TWI853345B - Photographing lens assembly, image capturing unit and electronic device - Google Patents

Abstract

A photographing lens assembly includes at least four lens elements that are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, at least one subsequent lens element and a last lens element that is closest to an image surface. Each of the at least four lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one surface among the image-side surface of the second lens element to the object-side surface of the last lens element is a metasurface having a subwavelength microstructure. When specific conditions are satisfied, the requirements of compact size and high image quality can be met by the photographing lens assembly, simultaneously.

Description

Camera system lens assembly, imaging device and electronic device

The present disclosure relates to a camera lens assembly, an imaging device and an electronic device, and in particular to a camera lens assembly and an imaging device suitable for an electronic device.

As semiconductor manufacturing technology becomes more advanced, the performance of electronic photosensitive components has been improved, and pixels can reach a smaller size. Therefore, optical lenses with high imaging quality have become an indispensable part.

As technology advances, the application scope of electronic devices equipped with optical lenses is becoming wider, and the requirements for optical lenses are becoming more diverse. In the past, it was difficult for optical lenses to strike a balance between the requirements of imaging quality, sensitivity, aperture size, volume or viewing angle. In particular, traditional refractive lenses use refractive optics to control imaging quality through changes in surface curvature, which limits the space for thickness reduction. Its disadvantages include oversized size and limited manufacturing precision, which hinders the application scope of optical components in different fields. Therefore, the present invention provides an optical lens to meet the requirements.

The present disclosure provides a camera lens assembly, an imaging device, and an electronic device. The camera lens assembly includes multiple lenses arranged in sequence along the optical path from the object side to the image side, and at least one surface of these lenses is a metasurface. The metasurface can control the light beam by using the optical properties generated by the sub-wavelength scale microstructures made on the substrate surface, and adjust the phase of the light to change the path of the light, which can realize the thinning of optical components and achieve a compact camera lens assembly. Moreover, when specific conditions are met, the camera lens assembly provided by the present disclosure can simultaneously meet the requirements of miniaturization and high imaging quality.

The present disclosure provides a camera lens set, comprising at least four lenses. The at least four lenses are sequentially arranged from the object side to the image side along the optical path, namely, a first lens, a second lens, at least one subsequent lens, and a last lens closest to the imaging surface. The at least four lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, at least one surface from the image side surface of the second lens to the object side surface of the last lens is a super-slim surface having a sub-wavelength microstructure. The focal length of the imaging system lens group is f, the maximum imaging height of the imaging system lens group is ImgH, the radius of curvature of the object side surface of the first lens is R1, and the focal length of the first lens is f1, which preferably meets the following conditions: 0.03<f/|R1|<30.00; and 0.05<|ImgH/f1|<10.00; wherein, the maximum angle of the maximum field edge light incident on the super-slim surface is θm, and the following conditions are preferably met at the super-slim surface closest to the object side: θm<40.0[degrees].

The present disclosure further provides a camera system lens set, comprising at least three lenses. The at least three lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, at least one lens among the at least three lenses is a pure refractive lens, and at least another lens among the at least three lenses is a metalens. Preferably, at least one of the object side surface and the image side surface of the metalens is a metalens surface, the metalens comprises a substrate and a sub-wavelength microstructure formed on the substrate, and the metalens surface comprises a surface of the substrate and a sub-wavelength microstructure formed on the surface of the substrate. Preferably, the surface of the substrate is a plane. Preferably, the at least three lenses include at least three lenses closest to the object side, and the three lenses are the first lens, the second lens, and the third lens in order from the object side to the image side along the optical path. The distance from the super-slim surface closest to the object side in the imaging system lens set to the imaging plane on the optical axis is ML, the distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, the interval distance between the second lens and the third lens on the optical axis is T23, the distance from the object side surface of the first lens to the image side surface of the last lens closest to the imaging plane on the optical axis is TD, all pure refractive lens materials and all super-slim lenses in the imaging system lens set are connected to the super-slim surface of the imaging system lens set. The minimum Abbe number of the base material of the mirror is Vmin, which preferably meets the following conditions: 0.05<ML/TL<0.98; 0.005<T23/TD<0.80; and Vmin<30.0; wherein the maximum angle of the edge light of the maximum field of view incident on the super-slim surface is θm, and the following conditions are preferably met at the super-slim surface closest to the imaging surface: θm<32.0 [degrees].

The present disclosure further provides a camera system lens set, comprising a plurality of lenses. The lenses at least include a first lens closest to the object side and at least one subsequent lens. The lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, the first lens is a pure refractive lens. Preferably, at least one lens among the at least one subsequent lens is a super-slim lens. Preferably, at least one of the object side surface and the image side surface of the super-slim lens is a super-surface, the super-lens includes a substrate and a sub-wavelength microstructure formed on the substrate, and the super-surface includes a surface of the substrate and a sub-wavelength microstructure formed on the surface of the substrate. Preferably, the surface of the substrate is a plane. The minimum Abbe number of all pure refractive lens materials and all superlenses in the imaging system lens set is Vmin, the thickness of the pure refractive lens closest to the object side in the imaging system lens set on the optical axis is CTc1, and the radius of curvature of the image side surface of the pure refractive lens closest to the imaging surface in the imaging system lens set is RLci, which preferably meets the following conditions: 6.0<Vmin<20.0; and 0.01<CTc1/|RLci|<30.00.

The present disclosure also provides a camera lens set, comprising at least five lenses. The at least five lenses are sequentially arranged from the object side to the image side along the optical path, namely, a first lens, a second lens, at least two subsequent lenses, and a last lens closest to the imaging surface. The at least five lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, at least one lens among the at least five lenses is a pure refractive lens, and at least another lens among the at least five lenses is a super-slim lens. Preferably, at least one surface from the image side surface of the second lens to the image side surface of the last lens is a super-slim surface having a sub-wavelength microstructure. Preferably, the image-side surface of the pure refractive lens closest to the imaging surface in the imaging system lens group is concave near the optical axis. The focal length of the imaging system lens group is f, and the focal length of the pure refractive lens closest to the object side in the imaging system lens group is fc1, which preferably meets the following conditions: 0.015<f/|fc1|<20.00.

The present disclosure provides an imaging device, which includes the aforementioned imaging system lens set and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging system lens set.

The present disclosure provides an electronic device, which includes the aforementioned imaging device.

When f/|R1| meets the above conditions, the radius of curvature of the object side surface of the first lens can be adjusted to control the angle at which light enters the lens group of the camera system, which helps to adjust the viewing angle and the outer diameter of the object side.

When |ImgH/f1| meets the above conditions, the focal length of the first lens can be adjusted so that the lens group of the imaging system has sufficient refractive power on the object side to correct aberrations.

When θm at the super-surface closest to the object side meets the above conditions, the incident angle of light on the super-surface at the object side of the camera lens assembly can be adjusted to help avoid excessive loss of light intensity during the imaging process.

When θm at the metasurface closest to the imaging surface meets the above conditions, the incident angle of light on the metasurface on the image side of the imaging system lens group can be adjusted, which helps maintain the ability of the sub-wavelength microstructure to correct aberrations and improve imaging quality.

When ML/TL meets the above conditions, the position of the super-slim surface in the lens group of the camera system can be adjusted, which helps to correct aberrations such as chromatic aberration to improve imaging quality.

When T23/TD meets the above conditions, the ratio of lens spacing to the lens group of the camera system can be adjusted to avoid interference between lenses due to too small lens spacing or increase in eccentricity error due to too large lens spacing.

When Vmin meets the above conditions, the Abbe number of the lens can be adjusted, which helps the lenses to cooperate with each other to correct chromatic aberration.

When CTc1/|RLci| meets the above conditions, the curvature radius of the image-side surface of the pure refractive lens closest to the imaging surface can be adjusted, which helps to improve the ability of the pure refractive lens to correct image curvature.

When f/|fc1| meets the above conditions, the focal length of the pure refractive lens closest to the object side can be adjusted so that the imaging system lens group has sufficient refractive power on the object side to correct aberrations.

The imaging system lens set includes a plurality of lenses, and these lenses include at least a first lens closest to the object side and at least one subsequent lens. These lenses may further include a second lens, the second lens is adjacent to the first lens on the image side of the first lens, and there is no other lens between the first lens and the second lens. The number of these lenses may be at least three, and the at least three lenses include at least three lenses closest to the object side, and the three lenses closest to the object side may be the first lens, the second lens, and the third lens in order from the object side to the image side along the optical path. The number of these lenses may be at least four, and the at least four lenses may be sequentially arranged from the object side to the image side along the optical path, including the first lens, the second lens, at least one subsequent lens, and the last lens closest to the imaging surface. The number of these lenses may be at least five, and the at least five lenses may be sequentially arranged from the object side to the image side along the optical path, including the first lens, the second lens, at least two subsequent lenses, and the last lens closest to the imaging surface. The lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction.

The lens of the camera system lens set can be a metalens lens or a pure refractive lens. Among them, at least one lens among these lenses can be a metalens lens. Among them, at least another lens among these lenses can be a pure refractive lens. Thereby, the production cost can be effectively reduced, which helps to increase the mass production capacity. Among them, the camera system lens set can include at least two pure refractive lenses.

The term "meta-lens" mentioned in this article refers to a lens having a metasurface (metasurface) having a sub-wavelength microstructure on at least one of its object-side surface and its image-side surface. Alternatively, the meta-lens may include a substrate and a sub-wavelength microstructure, wherein the substrate may be equivalent to a pure refractive lens or a flat optical element, the sub-wavelength microstructure is disposed on the substrate and faces at least one of the object side and the image side, and the sub-wavelength microstructure itself and the surface of the substrate on which the sub-wavelength microstructure is formed may together serve as the metasurface of the meta-lens. This helps to reduce the thickness of a single lens and improve aberrations. The term "sub-wavelength microstructure" mentioned in this article refers to a structure whose shape or arrangement period in at least one dimension is less than a reference wavelength. The object side surface and the image side surface of the super-slim lens can both be super-slim surfaces with sub-wavelength microstructures. In this way, the sub-wavelength microstructures on both sides of a single lens can cooperate with each other to further correct aberrations such as chromatic aberration of the lens group of the imaging system. At least one surface from the image side surface of the second lens to the image side surface of the last lens can be a super-slim surface with a sub-wavelength microstructure. This helps to correct the aberrations generated by the object side lens. At least one surface from the image side surface of the second lens to the object side surface of the last lens can be a super-slim surface with a sub-wavelength microstructure. The surface of the base of the super-slim surface with a sub-wavelength microstructure can be a plane. This helps maintain the manufacturing yield of sub-wavelength microstructures. The super-surface substrate material can be glass (such as silicon dioxide ( _SiO2 ) or fused silica, etc.), quartz or polymer (such as poly (methyl methacrylate), PMMA, SU-8 photoresist or plastic, etc.).

The sub-wavelength microstructure may be a nanofin, and each unit structure cross section of the nanofin may have different rotation angles at different positions on the lens surface. The nanofin may achieve phase control of 0~2π by changing the structure rotation angle. Alternatively, the sub-wavelength microstructure may also be a nanopillar, and each unit structure cross section of the nanopillar may have different sizes at different positions on the lens surface. The nanopillar may achieve phase control of 0~2π by changing the structure size. By adjusting the geometric structure and distribution of the sub-wavelength microstructure on the lens surface, it helps to control the phase of light. The sub-wavelength microstructure may be arranged in a hexagonal periodic array on the surface of the substrate. Thereby, the periodic structural arrangement of the sub-wavelength microstructure can have good symmetry, so as to enhance the stability of the camera lens assembly. Wherein, the sub-wavelength microstructure can be a dielectric material (such as Al ₂ O ₃ , SiO ₂ , TiO ₂ , HfO ₂ , Si ₃ N ₄ , etc.). Thereby, the material of the sub-wavelength microstructure can be adjusted, and the electric and magnetic resonance can be effectively regulated, which is helpful to control the optical properties. Wherein, the material of the sub-wavelength microstructure can also be a III-V semiconductor (such as BP, GaN, GaAs, etc.) or silicon, etc. Please refer to FIG. 48 and FIG. 49 , which are respectively a top view schematic diagram of a nanofin-type sub-wavelength microstructure Lm according to the present disclosure and a three-dimensional schematic diagram of a unit structure of the nanofin-type sub-wavelength microstructure Lm. Please refer to FIG. 50 and FIG. 51, which are respectively a top view schematic diagram of the sub-wavelength microstructure Lm in the form of a nanopillar according to the present disclosure and a three-dimensional schematic diagram of the unit structure of the sub-wavelength microstructure Lm in the form of a nanopillar. In FIG. 48 and FIG. 49, parameter θ is the structural rotation angle of the unit structure of the nanofin, and parameters L, W, and H are the length, width, and height of the unit structure of the nanofin, respectively. In FIG. 51, parameter D is the cross-sectional diameter of the unit structure of the nanopillar, and parameter H is the height of the unit structure of the nanopillar.

The term "pure refractive lens" mentioned in this article refers to an optical refractive element whose object side surface and image side surface do not have sub-wavelength microstructures. The pure refractive lens can be made of plastic material and both its object side surface and its image side surface can be aspherical. In this way, the production cost can be effectively reduced, the design freedom can be improved, and the mass production capacity can be increased. Among them, the lens closest to the object side in the lens group of the camera system (the first lens) can be a pure refractive lens (that is, at least one of the at least one subsequent lens mentioned above can be a super-slim lens). Thereby, the first lens can have sufficient light deflection ability, which helps to design various types of optical systems (such as wide-angle lenses, main lenses, and telephoto lenses) by changing the shape of the first lens. Among them, the lens (first lens) closest to the object side in the imaging system lens group can be a pure refractive lens and have negative refractive power. Thereby, the refractive power configuration of the imaging system lens group can be adjusted, which helps to increase the viewing angle. Among them, the image-side surface of the pure refractive lens closest to the imaging plane in the imaging system lens group can be a concave surface near the optical axis. Thereby, the back focal length of the imaging system lens group can be assisted to balance, and the off-axis aberration can be corrected at the same time. The object side surface of the second lens can be convex near the optical axis. The image side surface of the second lens can be concave near the optical axis. In this way, the surface shape of the second lens can be adjusted, which helps to correct aberrations such as astigmatism.

The working band of the lens group of the camera system can be visible light. Among them, the longitudinal spherical aberration on the imaging surface under each field of view in the visible light band can be between -0.10 mm and 0.10 mm. This helps to reduce chromatic aberration in the visible light band. Among them, the longitudinal spherical aberration on the imaging surface under each field of view in the visible light band can also be between -0.05 mm and 0.06 mm. The so-called visible light band refers to the wavelength range visible to the human eye, which can be a wavelength of about 400 nanometers to 700 nanometers.

The focal length of the imaging system lens group is f, and the radius of curvature of the object side surface of the first lens is R1, which can meet the following conditions: 0.03<f/|R1|<30.00. Thus, the radius of curvature of the object side surface of the first lens can be adjusted to control the angle at which light enters the imaging system lens group, which helps to adjust the viewing angle and the outer diameter of the object side. Among them, the following conditions can also be met: 0.10<f/|R1|<20.00.

The maximum imaging height of the lens group of the imaging system is ImgH (which can be half of the total diagonal length of the effective sensing area of the electronic photosensitive element), and the focal length of the first lens is f1, which can meet the following conditions: 0.05<|ImgH/f1|<10.00. In this way, the focal length of the first lens can be adjusted so that the lens group of the imaging system has sufficient refractive power at the object side to correct aberrations. Among them, the following conditions can also be met: 0.10<|ImgH/f1|<8.00. Among them, the following conditions can also be met: 0.20<|ImgH/f1|<6.00.

The maximum angle of the edge of the maximum field of view at which the light is incident on the super-slim surface is defined as θm. At the super-slim surface closest to the object side, the following condition can be met: θm<40.0[degrees]. In this way, the incident angle of the light on the super-slim surface at the object side of the camera lens group can be adjusted, which helps to avoid excessive loss of light intensity during the imaging process. At the super-slim surface closest to the imaging surface, the following condition can be met: θm<40.0[degrees]. In this way, the incident angle of the light on the super-slim surface at the image side of the camera lens group can be adjusted, which helps to maintain the ability of the sub-wavelength microstructure to correct aberrations and improve imaging quality. Among them, at the location of the super-slim surface closest to the imaging surface, the following conditions can also be met: θm<32.0[degrees]. At each location of the super-slim surface with a sub-wavelength microstructure, the following conditions can be met: 0.0[degrees]<θm<60.0[degrees]. In this way, the incident angle of light on the super-slim surface can be adjusted to avoid the reduction of the transmittance of the lens due to excessive incident angle. Among them, at each location of the super-slim surface with a sub-wavelength microstructure, the following conditions can also be met: 0.0[degrees]<θm<50.0[degrees]. Please refer to FIG. 46, which is a schematic diagram showing the parameter θm at the image side surface of the third lens E3 as a metasurface according to the first embodiment of the present disclosure, wherein ray 1 is the chief ray, ray 2 is the upper meridional ray, and ray 3 is the lower meridional ray; in FIG. 46, the angle between ray 2 and the normal line of the metasurface is 13.07°, and the angle between ray 3 and the normal line of the metasurface is 31.65°, so the maximum angle θm of the maximum field of view edge ray incident on the image side surface of the third lens E3 in the first embodiment is 31.65°.

The distance from the super-slim surface closest to the object side in the imaging system lens set to the imaging plane on the optical axis is ML, and the distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, which can meet the following conditions: 0.05<ML/TL<0.98. In this way, the position of the super-slim surface in the imaging system lens set can be adjusted, which helps to correct aberrations such as chromatic aberration to improve imaging quality. Among them, the following conditions can also be met: 0.20<ML/TL<0.90. Please refer to Figure 45, which is a schematic diagram of the parameters ML and TL in the first embodiment of the present disclosure.

The distance between the second lens and the third lens on the optical axis is T23, and the distance from the object side surface of the first lens to the image side surface of the last lens closest to the imaging plane on the optical axis is TD, which can meet the following conditions: 0.005<T23/TD<0.80. In this way, the ratio of the lens distance in the lens group of the imaging system can be adjusted to avoid interference between lenses due to too small lens distance or increase in eccentricity error due to too large lens distance. Among them, the following conditions can also be met: 0.02<T23/TD<0.60.

The minimum Abbe number of all pure refractive lens materials and all super-slim lens base materials in the camera lens set is Vmin, which can meet the following conditions: Vmin<30.0. In this way, the Abbe number of the lens can be adjusted, which helps the lenses to cooperate with each other to correct chromatic aberration. Among them, the following conditions can also be met: 6.0<Vmin<20.0.

The thickness of the pure refractive lens closest to the object side in the imaging system lens group on the optical axis is CTc1, and the curvature radius of the image side surface of the pure refractive lens closest to the imaging surface in the imaging system lens group is RLci, which can meet the following conditions: 0.01<CTc1/|RLci|<30.00. In this way, the curvature radius of the image side surface of the pure refractive lens closest to the imaging surface can be adjusted, which helps to improve the ability of the pure refractive lens to correct image curvature. Among them, the following conditions can also be met: 0.05<CTc1/|RLci|<20.00. Among them, the following conditions can also be met: 0.10<CTc1/|RLci|<10.00.

The focal length of the imaging system lens group is f, and the focal length of the pure refractive lens closest to the object side in the imaging system lens group is fc1, which can meet the following conditions: 0.015<f/|fc1|<20.00. In this way, the focal length of the pure refractive lens closest to the object side can be adjusted so that the imaging system lens group has sufficient refractive power at the object side to correct aberrations. Among them, the following conditions can also be met: 0.10<f/|fc1|<15.00.

The minimum Abbe number of all pure refractive lens materials in the camera lens group is Vcmin, which can meet the following conditions: 6.0<Vcmin<50.0. In this way, the Abbe number of the lens can be adjusted, which helps the lenses to cooperate with each other to correct chromatic aberration. Among them, the following conditions can also be met: 8.0<Vcmin<30.0. Among them, the following conditions can also be met: 10.0<Vcmin<25.0.

The height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, and the reference wavelength is λ0, which can meet the following conditions: 0.40<H/λ0<2.20. In this way, the height of the sub-wavelength microstructure can be adjusted so that it has a suitable structural size within the working band to maintain imaging quality. Among them, the following conditions can also be met: 0.60<H/λ0<1.60. Please refer to Figure 46, which is a schematic diagram of the parameter H according to the first embodiment of the present disclosure, wherein the parameter H represents the height of the sub-wavelength microstructure Lm perpendicular to the surface of the substrate Lb (substrate surface Ls). Please refer to Figures 49 and 51, which are schematic diagrams of the parameter H of the sub-wavelength microstructure Lm in the form of nanofins and nanopillars according to the present disclosure, respectively.

The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum imaging height of the lens group of the imaging system is ImgH, which can meet the following conditions: 1.40<TL/ImgH<15.00. In this way, a balance can be achieved between compressing the total length and increasing the imaging surface. Among them, the following conditions can also be met: 1.65<TL/ImgH<10.00. Among them, the following conditions can also be met: 1.80<TL/ImgH<8.00.

When the sub-wavelength microstructure is a nanocolumn, the height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, and the minimum diameter of the cross section of the nanocolumn is Dmin, which can meet the following conditions: 4.00<H/Dmin<40.00. In this way, the minimum diameter of the cross section of the nanocolumn can be adjusted to provide a suitable aspect ratio for the sub-wavelength microstructure, while avoiding the sub-wavelength microstructure being too small to increase the difficulty of manufacturing. Among them, the following conditions can also be met: 8.00<H/Dmin<25.00. Among them, the following conditions can also be met: 10.00<H/Dmin<20.00.

When the sub-wavelength microstructure is a nanocolumn, the height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, and the maximum diameter of the cross section of the nanocolumn is Dmax, which can meet the following conditions: 1.50<H/Dmax<10.00. In this way, the maximum diameter of the cross section of the nanocolumn can be adjusted to avoid the decrease in the transmittance of the lens due to the excessive size of the sub-wavelength microstructure. Among them, the following conditions can also be met: 2.50<H/Dmax<8.00. Among them, the following conditions can also be met: 3.20<H/Dmax<7.50. Please refer to Figure 51, which is a schematic diagram of the parameters H and D of the nanocolumn according to the present disclosure, wherein the parameter D represents the diameter of the cross section of the nanocolumn, its maximum value is Dmax, and its minimum value is Dmin.

The distance from the intersection of the image-side surface of the pure refractive lens closest to the imaging surface in the imaging system lens group on the optical axis to the maximum effective radius position of the image-side surface of the pure refractive lens closest to the imaging surface parallel to the optical axis is |SAGLci|, and the thickness of the pure refractive lens closest to the imaging surface in the imaging system lens group on the optical axis is CTLc, which can meet the following conditions: 0.05<|SAGLci|/CTLc<7.00. In this way, the overall shape of the pure refractive lens closest to the imaging surface can be adjusted, which helps to strike a balance between correcting off-axis aberrations and reducing the difficulty of molding. Among them, the following conditions can also be met: 0.07<|SAGLci|/CTLc<4.00. Please refer to Figure 47, which is a schematic diagram showing the parameters |SAGLci| and CTLc in the first embodiment of the present disclosure.

Half of the maximum viewing angle of the camera lens group is HFOV, which can meet the following conditions: 40.0[degrees]<HFOV<120.0[degrees]. In this way, the camera lens group can have the characteristics of a wide viewing angle and avoid the difficulty of image processing due to excessive viewing angle. Among them, the following conditions can also be met: 50.0[degrees]<HFOV<100.0[degrees].

The curvature radius of the object side surface of the pure refractive lens closest to the object side in the imaging system lens group is Rc1o, and the curvature radius of the image side surface of the pure refractive lens closest to the object side in the imaging system lens group is Rc1i, which can meet the following conditions: -30.00<(Rc1o-Rc1i)/(Rc1o+Rc1i)<0.30. In this way, the surface shape of the pure refractive lens closest to the object side can be adjusted so that the pure refractive lens has sufficient light deflection ability to control the direction of the light path.

The maximum absolute value of the distortion aberration on the imaging surface under each field of view is |Dist|_max, which can meet the following conditions: |Dist|_max<10.0%. In this way, it can be avoided that the distortion aberration is too large and affects the imaging. Among them, the following conditions can also be met: |Dist|_max<6.0%. Among them, the following conditions can also be met: |Dist|_max<3.5%.

The focal length of the pure refractive lens closest to the object side in the imaging system lens group is fc1, and the focal length of the second pure refractive lens closest to the object side in the imaging system lens group is fc2, which can meet the following conditions: -10.00<fc1/fc2<0.03. In this way, the first two pure refractive lenses on the object side can cooperate with each other to correct aberrations such as spherical aberration.

The refractive index of the material of the sub-wavelength microstructure of the metasurface is Nm, and the refractive index of the material of the substrate of the meta-lens is Ns. The metasurface with sub-wavelength microstructure in the lens set of the camera system can meet the following conditions: 0.50<Nm-Ns<2.50. In this way, the material of the sub-wavelength microstructure and the substrate can be adjusted, which helps to reduce the energy loss caused by the light passing through.

The refractive index of the material of the sub-wavelength microstructure of the metasurface is Nm. The metasurface with sub-wavelength microstructure in the camera lens group can meet the following conditions: 1.600<Nm<3.500. In this way, the material of the sub-wavelength microstructure can be adjusted, and the resonance of electricity and magnetism can be effectively controlled, which helps to control the optical properties. Among them, the following conditions can also be met: 2.000<Nm<3.400. Among them, the following conditions can also be met: 2.300<Nm<3.300.

The maximum effective radius of the super-slim surface with sub-wavelength microstructure in the camera lens group is Ym_max, and the maximum imaging height of the camera lens group is ImgH, which can meet the following conditions: 0.10<Ym_max/ImgH<0.75. In this way, the maximum effective radius of the super-slim lens can be adjusted, which helps to reduce sensitivity and improve manufacturing yield.

The height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, and the distance between the centers of two adjacent periodic structures in the sub-wavelength microstructure is P, which can meet the following conditions: 1.25<H/P<10.00. In this way, the ratio of the height and spacing of the sub-wavelength microstructure can be adjusted, which helps to strike a balance between maintaining the transmittance of the ultra-smooth lens and reducing the difficulty of manufacturing. Please refer to Figures 48 and 49, which are schematic diagrams of the parameters P and H of the sub-wavelength microstructure Lm in the form of nanofins according to the present disclosure. Please refer to Figures 50 and 51, which are schematic diagrams of the parameters P and H of the sub-wavelength microstructure Lm in the form of nanopillars according to the present disclosure.

The distance between the centers of two adjacent periodic structures in the sub-wavelength microstructure is P, and the reference wavelength is λ0, which can meet the following conditions: 0.05<P/λ0<0.80. In this way, the spacing distance between adjacent sub-wavelength microstructures in the periodic array can be adjusted, which helps the super-surface achieve the desired optical properties on the sub-wavelength scale.

The maximum Abbe number of all pure refractive lens materials in the camera lens group is Vcmax, and the minimum Abbe number of all pure refractive lens materials in the camera lens group is Vcmin, which can meet the following conditions: 1.10<Vcmax/Vcmin<5.20. In this way, the Abbe number of the lens can be adjusted, which helps the lenses to cooperate with each other to correct chromatic aberration. Among them, the following conditions can also be met: 1.50<Vcmax/Vcmin<4.50.

The maximum effective radius of the super-silver surface with sub-wavelength microstructure in the camera lens group is Ym_max, which can meet the following conditions: Ym_max<4.00[mm]. In this way, the maximum effective radius of the super-silver lens can be adjusted, which helps to reduce sensitivity and improve manufacturing yield. Among them, the following conditions can also be met: 0.20[mm]<Ym_max<3.50[mm].

The various technical features of the camera lens assembly disclosed in the above disclosure can be combined and configured to achieve corresponding effects.

In the imaging system lens set disclosed in the present disclosure, the lens material (the base material of the pure refractive lens material and the super-slim lens) can be glass or plastic. If the lens material is glass, the freedom of the refractive power configuration of the imaging system lens set can be increased, and the influence of the external environmental temperature change on the imaging can be reduced. The glass lens can be made by grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface (SPH) or an aspherical surface (ASP) can be set on the mirror surface, wherein a spherical lens can reduce the difficulty of manufacturing, and if an aspherical surface is set on the mirror surface, more control variables can be obtained to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the lens set of the disclosed imaging system. Furthermore, the aspherical surface can be made by plastic injection molding or molded glass lenses.

In the imaging system lens set disclosed in this disclosure, if the lens surface is aspherical, it means that the entire or a part of the optically effective area of the lens surface is aspherical.

In the camera lens assembly disclosed in the present disclosure, additives can be selectively added to any (or more) lens materials to produce light absorption or light interference effects to change the transmittance of the lens for light in a specific wavelength band, thereby reducing stray light and color deviation. For example, the additive can have the function of filtering light in the 600-800 nm wavelength band in the system to help reduce excess red light or infrared light; or it can filter light in the 350-450 nm wavelength band to reduce excess blue light or ultraviolet light. Therefore, the additive can prevent light in a specific wavelength band from interfering with imaging. In addition, the additive can be evenly mixed in a plastic material and made into a lens using injection molding technology. In addition, the additives can also be disposed in a coating on the lens surface to provide the above-mentioned effects.

In the imaging system lens set disclosed in the present disclosure, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens does not define its regional position, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

In the imaging system lens set disclosed in the present disclosure, the imaging surface of the imaging system lens set can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side, depending on the corresponding electronic photosensitive element.

In the imaging system lens assembly disclosed in the present disclosure, one or more imaging correction elements (flat field elements, etc.) can be selectively arranged between the lens closest to the imaging surface in the imaging optical path and the imaging surface to achieve the effect of correcting the image (image bending, etc.). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, surface shape (convex or concave, spherical or aspherical, diffraction surface and Fresnel surface, etc.) can be adjusted according to the requirements of the imaging device. Generally speaking, the preferred imaging correction element configuration is to place a thin plano-concave element with a concave surface toward the object side close to the imaging surface.

In the imaging system lens assembly disclosed in the present disclosure, at least one element having the function of deflecting the optical path, such as a prism or a reflector, can be selectively arranged on the imaging optical path between the object to the imaging surface, wherein the prism surface or the reflector surface can be a plane, a spherical surface, an aspherical surface or a free-form surface, etc., to provide the imaging system lens assembly with a more flexible spatial configuration, so that the thinness of the electronic device is not restricted by the total optical length of the imaging system lens assembly. For further explanation, please refer to Figures 59 and 60, wherein Figure 59 is a schematic diagram showing a configuration relationship of the optical path deflection element in the imaging system lens assembly according to the present disclosure, and Figure 60 is a schematic diagram showing another configuration relationship of the optical path deflection element in the imaging system lens assembly according to the present disclosure. As shown in Figures 59 and 60, the imaging system lens group can have a first optical axis OA1, an optical path bending element LF and a second optical axis OA2 in sequence from the object (not shown) to the imaging surface IMG along the optical path, wherein the optical path bending element LF can be arranged between the object and the lens group LG of the imaging system lens group as shown in Figure 59, or be arranged between the lens group LG of the imaging system lens group and the imaging surface IMG as shown in Figure 60. In addition, please refer to FIG. 61, which is a schematic diagram showing a configuration relationship of two optical path turning elements in an imaging system lens group according to the present disclosure. As shown in FIG. 61, the imaging system lens group can also have a first optical axis OA1, a first optical path turning element LF1, a second optical axis OA2, a second optical path turning element LF2 and a third optical axis OA3 in sequence from the object (not shown) to the imaging surface IMG along the optical path, wherein the first optical path turning element LF1 is disposed between the object and the lens group LG of the imaging system lens group, the second optical path turning element LF2 is disposed between the lens group LG of the imaging system lens group and the imaging surface IMG, and the direction of travel of the light on the first optical axis OA1 can be the same direction as the direction of travel of the light on the third optical axis OA3 as shown in FIG. 61. The camera system lens assembly can also be optionally configured with more than three optical path bending elements. This disclosure is not limited to the type, quantity and position of the optical path bending elements disclosed in the figure.

In the imaging system lens assembly disclosed in the present disclosure, at least one aperture stop may be provided, which may be located before the first lens, between the lenses, or after the last lens. The aperture stop may be a glare stop or a field stop, etc., which may be used to reduce stray light and help improve image quality.

In the camera lens set disclosed in the present disclosure, the aperture configuration can be a front aperture or a center aperture. The front aperture means that the aperture is set between the object and the first lens, and the center aperture means that the aperture is set between the first lens and the imaging plane. If the aperture is a front aperture, the exit pupil can be longer away from the imaging plane, giving it a telecentric effect and increasing the efficiency of the CCD or CMOS of the electronic photosensitive element in receiving the image; if it is a center aperture, it helps to expand the field of view of the camera lens set.

The present disclosure may appropriately set a variable aperture element, which may be a mechanical component or a light regulating component, which can control the size and shape of the aperture by electricity or electrical signals. The mechanical component may include movable parts such as blade sets and shielding plates; the light regulating component may include shielding materials such as filter elements, electrochromic materials, and liquid crystal layers. The variable aperture element can enhance the image adjustment ability by controlling the amount of light entering the image or the exposure time. In addition, the variable aperture element may also be the aperture of the present disclosure, which can adjust the image quality, such as depth of field or exposure speed, by changing the aperture value.

The present disclosure may appropriately set one or more optical elements to limit the form of light passing through the lens set of the imaging system. The optical element may be a filter, a polarizer, etc., but the present disclosure is not limited thereto. Moreover, the optical element may be a single-chip element, a composite component, or presented in the form of a film, etc., but the present disclosure is not limited thereto. The optical element may be placed at the object end, the image end, or between the lenses of the lens set of the imaging system to control the passage of a specific form of light, thereby meeting the application requirements.

The imaging system lens assembly disclosed in the present disclosure may include at least one optical lens, optical element or carrier, at least one surface of which has a low-reflection layer, and the low-reflection layer can effectively reduce stray light generated by light reflection at the interface. The low-reflection layer can be arranged on the ineffective area of the object side surface or the image side surface of the optical lens, or the connecting surface between the object side surface and the image side surface; the optical element can be a shading element, an annular spacer element, a lens barrel element, a flat glass (Cover glass), a blue glass (Blue glass), a filter element (Filter, Color filter), an optical path bending element, a prism or a mirror, etc.; the carrier can be a lens assembly lens holder, a micro lens arranged on a photosensitive element, the periphery of a photosensitive element substrate, or a glass sheet used to protect a photosensitive element, etc.

In the imaging system lens set disclosed in the present disclosure, the object side and the image side are determined according to the direction of the optical axis, and the data on the optical axis are calculated along the optical axis, and if the optical axis is deflected by an optical path deflection element, the data on the optical axis are also calculated along the optical axis.

Based on the above implementation method, a specific implementation example is proposed below and is explained in detail with the help of drawings.

<First embodiment>

Please refer to FIG. 1 and FIG. 2, wherein FIG. 1 is a schematic diagram of an imaging device according to a first embodiment of the present disclosure, and FIG. 2 is a graph of spherical aberration, astigmatism, and distortion curves of the first embodiment from left to right. As can be seen from FIG. 1, the imaging device 1 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, an aperture ST, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element (Filter) E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The third lens E3 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and its image side surface is a super-slim surface with a sub-wavelength microstructure. Further, the third lens E3 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface of the substrate facing the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The sixth lens E6 is a pure refractive lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

The curve equations of the aspheric surfaces of the above lenses are expressed as follows:

X: displacement parallel to the optical axis from the intersection of the aspheric surface and the optical axis to the point on the aspheric surface that is Y away from the optical axis; Y: the vertical distance between the point on the aspheric curve and the optical axis; R: radius of curvature; k: cone coefficient; and Ai: i-th order aspheric coefficient.

The phase equations of the metasurfaces of the above-mentioned meta-lenses are expressed as follows:

φ(r): phase profiles

d: diffraction order

λ ₀ : reference wavelength

r: radial coordinate

According to the above phase equation, the relationship between the phase (unit: radian rad) and the radial coordinate (unit: mm) of the image side surface of the third lens E3 as a super-surface having a sub-wavelength microstructure in the first embodiment is shown in FIG52. The sub-wavelength microstructure can be in the form of nanofins or nanorods to control the phase. Among them, the cross-section of each unit structure of the nanofin has different rotation angles (such as the aforementioned θ, refer to the annotations of Figure 48) at different positions on the lens surface (substrate surface Ls), and its structure can be shown in the top view of Figure 53. The nanofin completes the phase control of 0~2π by changing the rotation angle (0°~180°); the cross-section of each unit structure of the nanocolumn has different sizes (such as the aforementioned diameter D, refer to the annotations of Figure 51) at different positions on the lens surface (substrate surface Ls). Its structure can be shown in the top view of Figure 54. The nanocolumn completes the phase control of 0~2π by changing the cylinder diameter.

In the camera lens set of the first embodiment, the focal length of the camera lens set is f, the aperture value (F-number) of the camera lens set is Fno, and half of the maximum viewing angle in the camera lens set is HFOV, and its values are as follows: f=1.78 mm, Fno=2.40, HFOV=59.9 degrees (deg.).

The maximum imaging height of the camera lens group is ImgH, and the focal length of the first lens E1 is f1, which meets the following conditions: |ImgH/f1|=0.54.

The distance from the object side surface of the first lens E1 to the imaging surface IMG on the optical axis is TL, and the maximum imaging height of the imaging system lens group is ImgH, which meets the following conditions: TL/ImgH=1.91.

The maximum value of the maximum effective radius of the super-surface with sub-wavelength microstructure in the imaging system lens set is Ym_max, and the maximum imaging height of the imaging system lens set is ImgH, which satisfies the following condition: Ym_max/ImgH=0.37. In this embodiment, the maximum effective radius of the image-side surface of the third lens E3 is the largest of the maximum effective radii of all super-surfaces with sub-wavelength microstructures, so Ym_max is the maximum effective radius of the image-side surface of the third lens E3.

The maximum effective radius of the super-surface with sub-wavelength microstructure in the camera lens set is Ym_max, which satisfies the following conditions: Ym_max=0.86[mm].

The distance from the super-slim surface closest to the object side in the imaging system lens group to the imaging surface IMG on the optical axis is ML, and the distance from the object side surface of the first lens E1 to the imaging surface IMG on the optical axis is TL, which meets the following condition: ML/TL=0.64. In this embodiment, the super-slim surface closest to the object side is the image side surface of the third lens E3, so ML is the distance from the image side surface of the third lens E3 to the imaging surface IMG on the optical axis.

The distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the distance between the object side surface of the first lens E1 and the image side surface of the last lens closest to the imaging surface IMG on the optical axis is TD, which satisfies the following condition: T23/TD=0.009. In this embodiment, the distance between two adjacent lenses on the optical axis refers to the distance between two adjacent lens surfaces of two adjacent lenses on the optical axis. In this embodiment, the last lens closest to the imaging surface IMG is the sixth lens E6, so TD is the distance between the object side surface of the first lens E1 and the image side surface of the sixth lens E6 on the optical axis.

The focal length of the imaging system lens set is f, and the focal length of the pure refractive lens closest to the object side in the imaging system lens set is fc1, which satisfies the following condition: f/|fc1|=0.42. In this embodiment, the pure refractive lens closest to the object side is the first lens E1, so fc1 is the focal length of the first lens E1.

The focal length of the pure refractive lens closest to the object side in the imaging system lens set is fc1, and the focal length of the pure refractive lens second closest to the object side in the imaging system lens set is fc2, which meets the following condition: fc1/fc2=-1.53. In this embodiment, the second pure refractive lens closest to the object side is the second lens E2, so fc2 is the focal length of the second lens E2.

The focal length of the camera lens group is f, and the radius of curvature of the object side surface of the first lens E1 is R1, which meets the following conditions: f/|R1|=0.23.

The thickness of the pure refractive lens closest to the object side in the imaging system lens group on the optical axis is CTc1, and the curvature radius of the image side surface of the pure refractive lens closest to the imaging surface IMG in the imaging system lens group is RLci, which meets the following conditions: CTc1/|RLci|=0.33. In this embodiment, the pure refractive lens closest to the imaging surface IMG is the sixth lens E6, so RLci is the curvature radius of the image side surface of the sixth lens E6.

The radius of curvature of the object-side surface of the pure refractive lens closest to the object side in the imaging system lens group is Rc1o, and the radius of curvature of the image-side surface of the pure refractive lens closest to the object side in the imaging system lens group is Rc1i, which meets the following conditions: (Rc1o-Rc1i)/(Rc1o+Rc1i)=2.47.

The distance from the intersection of the image side surface of the pure refractive lens closest to the imaging surface IMG in the imaging system lens set on the optical axis to the maximum effective radius position of the image side surface of the pure refractive lens closest to the imaging surface IMG parallel to the optical axis is |SAGLci|, and the thickness of the pure refractive lens closest to the imaging surface IMG in the imaging system lens set on the optical axis is CTLc, which meets the following conditions: |SAGLci|/CTLc=1.03.

The minimum Abbe number of all pure refractive lens materials and all super-lens base materials in the camera system lens set is Vmin, which meets the following conditions: Vmin=19.5. In this embodiment, the Abbe number of the sixth lens E6 is the smallest of the Abbe numbers of all pure refractive lens materials and all super-lens base materials, so Vmin is the Abbe number of the sixth lens E6.

The minimum Abbe number of all pure refractive lens materials in the camera lens set is Vcmin, which meets the following conditions: Vcmin=19.5. In this embodiment, the Abbe number of the sixth lens E6 is the smallest of the Abbe numbers of all pure refractive lens materials, so Vcmin is the Abbe number of the sixth lens E6.

The maximum value of the Abbe number of all pure refractive lens materials in the camera lens set is Vcmax, and the minimum value of the Abbe number of all pure refractive lens materials in the camera lens set is Vcmin, which meets the following conditions: Vcmax/Vcmin=2.88. In this embodiment, the Abbe number of the first lens E1 is the largest among the Abbe numbers of all pure refractive lens materials, so Vcmax is the Abbe number of the first lens E1.

The maximum absolute value of the distortion aberration on the imaging surface IMG in each field of view is |Dist|_max, which satisfies the following conditions: |Dist|_max=24.99%.

When the sub-wavelength microstructure Lm on the image side surface of the third lens E3 as a metasurface is a nanofin, the local top view of the structure is shown in Figure 55. In addition, when the HFOV is 0 degrees, the simulation results of the rotation angle (θ) of the nanofin unit structure relative to the transmittance and phase are shown in Figure 56, where the nanofin completes the phase control of 0~2π by changing the rotation angle (0°~180°).

When the sub-wavelength microstructure on the image-side surface of the third lens E3 as a super-surface is a nanofin, the material of the nanofin is TiO2 (refractive index = 2.947), the height of the nanofin unit structure (the height of the sub-wavelength microstructure perpendicular to the surface of the substrate) is H, the length of the nanofin unit structure is L, the width of the nanofin unit structure is W, and the distance between the centers of two adjacent periodic structures in the nanofin (sub-wavelength microstructure) is P, which meets the following conditions: H = 600 [nanometers]; L = 190 [nanometers]; W = 72 [nanometers]; and P = 320 [nanometers].

When the sub-wavelength microstructure Lm on the image side surface of the third lens E3 as a super-surface is a nanocolumn, the local top view of the structure is shown in Figure 57. In addition, when the HFOV is 0 degrees, the simulation results of the cylindrical diameter (D) of the nanocolumn unit structure relative to the transmittance and phase are shown in Figure 58, where the nanocolumn achieves phase control of 0~2π by changing the cylindrical diameter (50nm~160nm).

When the sub-wavelength microstructure on the image-side surface of the third lens E3 as a super-surface is a nanocolumn, the material of the nanocolumn is TiO2 (refractive index = 2.947), the height of the nanocolumn unit structure (the height of the sub-wavelength microstructure perpendicular to the surface of the substrate) is H, the diameter of the cross-section of the nanocolumn unit structure is D, and the distance between the centers of two adjacent periodic structures in the nanocolumn (sub-wavelength microstructure) is P, which meets the following conditions: H = 600 [nanometers]; D = 50 [nanometers] ~ 160 [nanometers]; and P = 250 [nanometers].

The height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, the reference wavelength is λ0, the nanofin meets the following conditions: H/λ0=1.08; the nanopillar meets the following conditions: H/λ0=1.08.

The distance between the centers of two adjacent periodic structures in the sub-wavelength microstructure is P, the reference wavelength is λ0, the nanofin meets the following conditions: P/λ0=0.58; the nanopillar meets the following conditions: P/λ0=0.45.

The height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, and the distance between the centers of two adjacent periodic structures in the sub-wavelength microstructure is P. The nanofin meets the following conditions: H/P=1.88; the nanopillar meets the following conditions: H/P=2.40.

The height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, the minimum diameter of the cross section of the nanocolumn is Dmin, and the nanocolumn meets the following conditions: H/Dmin=12.00.

The height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, the maximum diameter of the cross section of the nanocolumn is Dmax, and the nanocolumn meets the following conditions: H/Dmax=3.75.

The refractive index of the material of the sub-wavelength microstructure of the super-surface is Nm. The nanofin meets the following conditions: Nm=2.947; the nanorod meets the following conditions: Nm=2.947.

The refractive index of the material of the sub-wavelength microstructure of the super-silver surface is Nm, and the refractive index of the material of the substrate of the super-silver lens is Ns. The nanofin meets the following conditions: Nm-Ns=1.43; the nanopillar meets the following conditions: Nm-Ns=1.43.

Please refer to Table 1A to Table 1C below.

Table 1A is the detailed structural data of the first embodiment of FIG. 1, wherein the units of the radius of curvature, thickness and focal length are millimeters (mm), and surfaces 0 to 16 represent the surfaces from the object side to the image side in sequence. Table 1B is the aspheric surface data of the first embodiment, wherein k is the cone coefficient in the aspheric curve equation, and A4 to A20 represent the 4th to 20th order aspheric surface coefficients of each surface. Table 1C is the phase equation data of the super-slim surface of the super-lens in the first embodiment, wherein C1 to C7 represent the phase equation coefficients of each surface of the super-slim surface of the super-lens. In addition, the following tables of the embodiments correspond to the schematic diagrams and aberration curves of the embodiments. The definitions of the data in the tables are the same as those in Table 1A, Table 1B and Table 1C of the first embodiment, and will not be elaborated here.

<Second embodiment>

Please refer to FIG. 3 and FIG. 4, wherein FIG. 3 is a schematic diagram of an imaging device according to a second embodiment of the present disclosure, and FIG. 4 is a graph of spherical aberration, astigmatism and distortion curves of the second embodiment from left to right. As can be seen from FIG. 3, the imaging device 2 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, an aperture ST, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E9 and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. Further, the fourth lens E4 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fifth lens E5 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The sixth lens E6 is a pure refractive lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 2A to Table 2C below.

In the second embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 2D are the same as those in the first embodiment and are not elaborated here.

<Third embodiment>

Please refer to FIG. 5 and FIG. 6, wherein FIG. 5 is a schematic diagram of an imaging device according to a third embodiment of the present disclosure, and FIG. 6 is a graph of spherical aberration, astigmatism, and distortion curves of the third embodiment from left to right. As can be seen from FIG. 5, the imaging device 3 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, an aperture ST, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The third lens E3 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. In other words, the third lens E3 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The sixth lens E6 is a pure refractive lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 3A to Table 3C below.

In the third embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 3D are the same as those in the first embodiment and will not be elaborated here.

<Fourth embodiment>

Please refer to FIG. 7 and FIG. 8, wherein FIG. 7 is a schematic diagram of an imaging device according to a fourth embodiment of the present disclosure, and FIG. 8 is a graph of spherical aberration, astigmatism, and distortion curves of the fourth embodiment from left to right. As can be seen from FIG. 7, the imaging device 4 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The second lens E2 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. Further, the second lens E2 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a pure refractive lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The sixth lens E6 is a pure refractive lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 4A to Table 4C below.

In the fourth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 4D are the same as those in the first embodiment and are not elaborated here.

<Fifth embodiment>

Please refer to FIG. 9 and FIG. 10, wherein FIG. 9 is a schematic diagram of an imaging device according to the fifth embodiment of the present disclosure, and FIG. 10 is a graph of spherical aberration, astigmatism and distortion curves of the fifth embodiment from left to right. As can be seen from FIG. 9, the imaging device 5 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E9, a flat glass (Cover Glass) E10 and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with negative refractive power and is made of glass. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are spherical.

The second lens E2 is a pure refractive lens with positive refractive power and is made of glass. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are spherical.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object-side surface is a plane near the optical axis, its image-side surface is a convex surface near the optical axis, its image-side surface is a spherical surface, and its object-side surface is a super-slim surface with a sub-wavelength microstructure. Further, the fourth lens E4 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fifth lens E5 is a pure refractive lens with negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are spherical.

The sixth lens E6 is a pure refractive lens with positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are spherical, and its object-side surface is bonded to the image-side surface of the fifth lens E5.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

The material of the flat glass E10 is glass. It is placed between the filter element E9 and the imaging surface IMG and does not affect the focal length of the lens group of the camera system.

Please refer to Table 5A to Table 5C below.

In the fifth embodiment, the curve equation of the aspheric surface and the phase equation of the super-spherical surface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 5D are the same as those in the first embodiment and are not repeated here.

<Sixth Implementation Example>

Please refer to FIG. 11 and FIG. 12, wherein FIG. 11 is a schematic diagram of an imaging device according to the sixth embodiment of the present disclosure, and FIG. 12 is a graph of spherical aberration, astigmatism, and distortion curves of the sixth embodiment from left to right. As can be seen from FIG. 11, the imaging device 6 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E9, a flat glass E10, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with negative refractive power and is made of glass. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are spherical.

The second lens E2 is a pure refractive lens with positive refractive power and is made of glass. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are spherical.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of glass. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are spherical.

The fifth lens E5 is a pure refractive lens with negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are spherical.

The sixth lens E6 is a super-slim lens with positive refractive power, and its base is made of glass, its object side surface is convex near the optical axis, its image side surface is flat near the optical axis, its object side surface is spherical, its object side surface is bonded to the image side surface of the fifth lens E5, and its image side surface is a super-slim surface with a sub-wavelength microstructure. Further, the sixth lens E6 includes a base and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the base surface of the base facing the image side, and the super-slim surface includes the base surface and the sub-wavelength microstructure.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

The material of the flat glass E10 is glass. It is placed between the filter element E9 and the imaging surface IMG and does not affect the focal length of the lens group of the camera system.

Please refer to Table 6A to Table 6C below.

In the sixth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 6D are the same as those in the first embodiment and are not elaborated here.

<Seventh Implementation Example>

Please refer to FIG. 13 and FIG. 14, wherein FIG. 13 is a schematic diagram of an imaging device according to the seventh embodiment of the present disclosure, and FIG. 14 is a graph of spherical aberration, astigmatism, and distortion curves of the seventh embodiment from left to right. As can be seen from FIG. 13, the imaging device 7 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a flat glass E10, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of seven lenses (E1, E2, E3, E4, E5, E6, E7), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with negative refractive power and is made of glass. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are spherical.

The second lens E2 is a pure refractive lens with positive refractive power and is made of glass. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are spherical.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are spherical.

The fifth lens E5 is a pure refractive lens with negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are spherical.

The sixth lens E6 is a super-slim lens with positive refractive power, and its base is made of glass, its object side surface is convex near the optical axis, its image side surface is flat near the optical axis, its object side surface is spherical, its object side surface is bonded to the image side surface of the fifth lens E5, and its image side surface is a super-slim surface with a sub-wavelength microstructure. Further, the sixth lens E6 includes a base and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the base surface of the base facing the image side, and the super-slim surface includes the base surface and the sub-wavelength microstructure.

The seventh lens E7 is a super-slim lens with negative refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and its object side surface is a super-slim surface with a sub-wavelength microstructure. In other words, the seventh lens E7 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure. The seventh lens E7 has a light filtering function and can be used as a light filtering element.

The material of the flat glass E10 is glass. It is placed between the seventh lens E7 and the imaging surface IMG and does not affect the focal length of the lens group of the camera system.

Please refer to Table 7A to Table 7C below.

In the seventh embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 7D are the same as those in the first embodiment and are not elaborated here.

<Eighth Implementation Example>

Please refer to Figures 15 and 16, wherein Figure 15 is a schematic diagram of an imaging device according to the eighth embodiment of the present disclosure, and Figure 16 is a graph of spherical aberration, astigmatism, and distortion curves of the eighth embodiment from left to right. As can be seen from Figure 15, the imaging device 8 includes an imaging system lens group (not separately labeled) and an electronic photosensitive element IS. The imaging system lens group includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter element E9, and an imaging surface IMG in sequence from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging system lens group includes four lenses (E1, E2, E3, E4), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The second lens E2 is a super-slim lens with positive refractive power, and its substrate is made of glass. Its object-side surface is a plane near the optical axis, and its image-side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. In other words, the second lens E2 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The third lens E3 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the fourth lens E4 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 8A to Table 8C below.

In the eighth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 8D are the same as those in the first embodiment and are not elaborated here.

<Ninth embodiment>

Please refer to Figures 17 and 18, wherein Figure 17 is a schematic diagram of an imaging device according to the ninth embodiment of the present disclosure, and Figure 18 is a graph of spherical aberration, astigmatism, and distortion curves of the ninth embodiment from left to right. As can be seen from Figure 17, the imaging device 9 includes an imaging system lens set (not labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter element E9, and an imaging surface IMG along the optical path from the object side to the image side. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging system lens set includes four lenses (E1, E2, E3, E4), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The third lens E3 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. In other words, the third lens E3 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fourth lens E4 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the fourth lens E4 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 9A to Table 9C below.

In the ninth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 9D are the same as those in the first embodiment and are not elaborated here.

<Tenth Implementation Example>

Please refer to FIG. 19 and FIG. 20, wherein FIG. 19 is a schematic diagram of an imaging device according to the tenth embodiment of the present disclosure, and FIG. 20 is a graph of spherical aberration, astigmatism, and distortion curves of the tenth embodiment from left to right. As can be seen from FIG. 19, the imaging device 10 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a filter element E9, and an imaging surface IMG in sequence from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of four lenses (E1, E2, E3, E4), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a super-slim lens with positive refractive power, and its substrate is made of glass. Its object-side surface is a plane near the optical axis, and its image-side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. In other words, the fourth lens E4 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The filter element E9 is made of glass and is placed between the fourth lens E4 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 10A to Table 10C below.

In the tenth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 10D are the same as those in the first embodiment and are not elaborated here.

<Eleventh Implementation Example>

Please refer to FIG. 21 and FIG. 22, wherein FIG. 21 is a schematic diagram of an imaging device according to the eleventh embodiment of the present disclosure, and FIG. 22 is a graph of spherical aberration, astigmatism, and distortion curves of the eleventh embodiment from left to right. As can be seen from FIG. 21, the imaging device 11 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The third lens E3 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and its image side surface is a super-slim surface with a sub-wavelength microstructure. Further, the third lens E3 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the image side of the substrate, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the fifth lens E5 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 11A to Table 11C below.

In the eleventh embodiment, the curve equation of the aspheric surface and the phase equation of the super-spherical surface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 11D are the same as those in the first embodiment and are not elaborated here.

<Twelfth embodiment>

Please refer to FIG. 23 and FIG. 24, wherein FIG. 23 is a schematic diagram of an imaging device according to the twelfth embodiment of the present disclosure, and FIG. 24 is a graph of spherical aberration, astigmatism, and distortion curves of the twelfth embodiment from left to right. As can be seen from FIG. 23, the imaging device 12 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The third lens E3 is a super-slim lens with negative refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. In other words, the third lens E3 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the fifth lens E5 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 12A to Table 12C below.

In the twelfth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 12D are the same as those in the first embodiment and are not elaborated here.

<Thirteenth Implementation Example>

Please refer to FIG. 25 and FIG. 26, wherein FIG. 25 is a schematic diagram of an imaging device according to the thirteenth embodiment of the present disclosure, and FIG. 26 is a graph of spherical aberration, astigmatism, and distortion curves of the thirteenth embodiment from left to right. As can be seen from FIG. 25, the imaging device 13 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses.

The first lens E1 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and its image side surface is a super-slim surface with a sub-wavelength microstructure. Further, the first lens E1 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the image side of the substrate, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The second lens E2 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The third lens E3 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the fifth lens E5 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 13A to Table 13C below.

In the thirteenth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 13D are the same as those in the first embodiment and will not be elaborated here.

<Fourteenth Implementation Example>

Please refer to FIG. 27 and FIG. 28, wherein FIG. 27 is a schematic diagram of an imaging device according to the fourteenth embodiment of the present disclosure, and FIG. 28 is a graph of spherical aberration, astigmatism, and distortion curves of the fourteenth embodiment from left to right. As can be seen from FIG. 27, the imaging device 14 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of five lenses (E1, E2, E3, E4, E5), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a super-slim lens with positive refractive power, and its substrate is made of glass. The object-side surface is a plane near the optical axis, and the image-side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. Further, the fourth lens E4 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fifth lens E5 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the fifth lens E5 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 14A to Table 14C below.

In the fourteenth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 14D are the same as those in the first embodiment and are not elaborated here.

<Fifteenth Implementation Example>

Please refer to FIG. 29 to FIG. 30, wherein FIG. 29 is a schematic diagram of an imaging device according to the fifteenth embodiment of the present disclosure, and FIG. 30 is a graph of spherical aberration, astigmatism, and distortion curves of the fifteenth embodiment from left to right. As can be seen from FIG. 29, the imaging device 15 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The sixth lens E6 is a super-slim lens with negative refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. In other words, the sixth lens E6 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 15A to Table 15C below.

In the fifteenth embodiment, the curve equation of the aspheric surface and the phase equation of the metasurface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 15D are the same as those in the first embodiment and are not elaborated here.

<Sixteenth Implementation Example>

Please refer to FIG. 31 and FIG. 32, wherein FIG. 31 is a schematic diagram of an imaging device according to the sixteenth embodiment of the present disclosure, and FIG. 32 is a graph of spherical aberration, astigmatism, and distortion curves of the sixteenth embodiment from left to right. As can be seen from FIG. 31, the imaging device 16 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, an aperture ST, a second lens E2, a third lens E3, an aperture S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and its image side surface is a super-slim surface with a sub-wavelength microstructure. Further, the first lens E1 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the image side of the substrate, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The second lens E2 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The third lens E3 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The sixth lens E6 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 16A to Table 16C below.

In the sixteenth embodiment, the curve equation of the aspheric surface and the phase equation of the super-spherical surface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 16D are the same as those in the first embodiment and are not elaborated here.

<Seventeenth Implementation Example>

Please refer to FIG. 33 and FIG. 34, wherein FIG. 33 is a schematic diagram of an imaging device according to the seventeenth embodiment of the present disclosure, and FIG. 34 is a graph of spherical aberration, astigmatism and distortion curves of the seventeenth embodiment from left to right. As can be seen from FIG. 33, the imaging device 17 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E9 and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of six lenses (E1, E2, E3, E4, E5, E6), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The third lens E3 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a super-slim lens with negative refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and both surfaces are super-slim surfaces with sub-wavelength microstructures. Further, the fourth lens E4 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the object side and the image side, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fifth lens E5 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The sixth lens E6 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 17A to Table 17C below.

In the seventeenth embodiment, the curve equation of the aspheric surface and the phase equation of the super-spherical surface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 17D are the same as those in the first embodiment and are not elaborated here.

<Eighteenth Implementation Example>

Please refer to FIG. 35 and FIG. 36, wherein FIG. 35 is a schematic diagram of an imaging device according to the eighteenth embodiment of the present disclosure, and FIG. 36 is a graph of spherical aberration, astigmatism and distortion curves of the eighteenth embodiment from left to right. As can be seen from FIG. 35, the imaging device 18 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes an aperture ST, a first lens E1, a second lens E2, a stop S1, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9 and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The third lens E3 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object-side surface is a plane near the optical axis, its image-side surface is a plane near the optical axis, and its image-side surface is a super-slim surface with a sub-wavelength microstructure. Further, the fifth lens E5 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the image side of the substrate, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The sixth lens E6 is a pure refractive lens with negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical.

The seventh lens E7 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The eighth lens E8 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 18A to Table 18C below.

In the eighteenth embodiment, the curve equation of the aspheric surface and the phase equation of the super-spherical surface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 18D are the same as those in the first embodiment and are not elaborated here.

<Nineteenth Implementation Example>

Please refer to FIG. 37 and FIG. 38, wherein FIG. 37 is a schematic diagram of an imaging device according to the nineteenth embodiment of the present disclosure, and FIG. 38 is a graph of spherical aberration, astigmatism, and distortion curves of the nineteenth embodiment from left to right. As can be seen from FIG. 37, the imaging device 19 includes an imaging system lens set (not separately labeled) and an electronic photosensitive element IS. The imaging system lens set includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a diaphragm S1, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG in order from the object side to the image side along the optical path. Among them, the electronic photosensitive element IS is disposed on the imaging surface IMG. The camera lens group consists of eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interpolated lenses between the lenses.

The first lens E1 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The second lens E2 is a pure refractive lens with positive refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The third lens E3 is a super-slim lens with positive refractive power, and its substrate is made of glass, its object side surface is a plane near the optical axis, its image side surface is a plane near the optical axis, and its image side surface is a super-slim surface with a sub-wavelength microstructure. Further, the third lens E3 includes a substrate and a sub-wavelength microstructure, wherein the sub-wavelength microstructure is formed on the substrate surface facing the image side of the substrate, and the super-slim surface includes the substrate surface and the sub-wavelength microstructure.

The fourth lens E4 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The fifth lens E5 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The sixth lens E6 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis. Both surfaces are aspherical.

The seventh lens E7 is a pure refractive lens with positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical.

The eighth lens E8 is a pure refractive lens with negative refractive power and is made of plastic. Its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis. Both surfaces are aspherical.

The filter element E9 is made of glass and is placed between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the lens group of the camera system.

Please refer to Table 19A to Table 19C below.

In the nineteenth embodiment, the curve equation of the aspheric surface and the phase equation of the super-spherical surface are expressed in the same form as in the first embodiment. In addition, the definitions described in Table 19D are the same as those in the first embodiment and are not elaborated here.

<Twentieth embodiment>

Please refer to FIG. 39, which is a three-dimensional schematic diagram of an imaging device according to the twentieth embodiment of the present disclosure. In this embodiment, the imaging device 100 is a camera module. The imaging device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive element 103, and an image stabilization module 104. The imaging lens 101 includes the imaging system lens assembly of the first embodiment, a lens barrel (not separately labeled) for carrying the imaging system lens assembly, and a support device (Holder Member, not separately labeled). The imaging lens 101 can also be changed to be configured with the imaging system lens assembly of the other embodiments mentioned above, and the present disclosure is not limited to this. The imaging device 100 uses the imaging lens 101 to focus light to generate an image, and cooperates with the driving device 102 to focus the image. Finally, the image is formed on the electronic photosensitive element 103 and can be output as image data.

The driving device 102 may have an auto-focus function, and its driving method may use a driving system such as a voice coil motor (VCM), a micro electro-mechanical system (MEMS), a piezoelectric system (Piezoelectric), and a shape memory alloy. The driving device 102 allows the imaging lens 101 to obtain a better imaging position, and can provide a clear image of the object at different object distances. In addition, the imaging device 100 is equipped with an electronic photosensitive element 103 (such as CMOS, CCD) with good sensitivity and low noise, which is set on the imaging surface of the camera lens group, which can truly present the good imaging quality of the camera lens group.

The image stabilization module 104 is, for example, an accelerometer, a gyroscope, or a Hall Effect Sensor. The drive device 102 can be used together with the image stabilization module 104 as an optical image stabilization device (Optical Image Stabilization, OIS), which compensates for the blurred image caused by shaking at the moment of shooting by adjusting the changes in different axes of the imaging lens 101, or uses the image compensation technology in the imaging software to provide an electronic image stabilization function (EIS), further improving the image quality of dynamic and low-light scene shooting.

<Example 21>

Please refer to Figures 40 to 42, wherein Figure 40 is a three-dimensional schematic diagram of one side of an electronic device according to the twenty-first embodiment of the present disclosure, Figure 41 is a three-dimensional schematic diagram of another side of the electronic device of Figure 40, and Figure 42 is a system block diagram of the electronic device of Figure 40.

In this embodiment, the electronic device 200 is a smart phone. The electronic device 200 includes the imaging device 100, imaging device 100a, imaging device 100b, imaging device 100c, imaging device 100d, flash module 201, focus assist module 202, image signal processor 203 (Image Signal Processor), display module 204 and image software processor 205 of the twentieth embodiment. The imaging device 100 and the imaging device 100a are both arranged on the same side of the electronic device 200. The focus assist module 202 can adopt a laser ranging or a time of flight (ToF) module, but the present disclosure is not limited thereto. The image capturing device 100b, the image capturing device 100c, the image capturing device 100d and the display module 204 are all disposed on the other side of the electronic device 200, and the display module 204 can be a user interface, so that the image capturing device 100b, the image capturing device 100c and the image capturing device 100d can be used as a front lens to provide a selfie function, but the present disclosure is not limited thereto. Moreover, the image capturing device 100a, the image capturing device 100b, the image capturing device 100c and the image capturing device 100d can all include the imaging system lens set of the present disclosure and can all have a similar structural configuration to the image capturing device 100. Specifically, the imaging device 100a, the imaging device 100b, the imaging device 100c and the imaging device 100d may each include an imaging lens, a driving device, an electronic photosensitive element and an image stabilization module. The imaging lenses of the imaging device 100a, the imaging device 100b, the imaging device 100c and the imaging device 100d may each include an optical lens assembly such as the imaging system lens assembly disclosed herein, a lens barrel for carrying the optical lens assembly and a supporting device.

The imaging device 100 is a wide-angle imaging device, the imaging device 100a is an ultra-wide-angle imaging device, the imaging device 100b is a wide-angle imaging device, the imaging device 100c is an ultra-wide-angle imaging device, and the imaging device 100d is a time-of-flight ranging imaging device. The imaging device 100 and the imaging device 100a of this embodiment have different viewing angles, so that the electronic device 200 can provide different magnifications to achieve the optical zoom shooting effect. In addition, the imaging device 100d can obtain the depth information of the image. The above-mentioned electronic device 200 is taken as an example including a plurality of imaging devices 100, 100a, 100b, 100c, and 100d, but the number and configuration of the imaging devices are not used to limit the present disclosure.

When the user takes a picture of the object 206, the electronic device 200 uses the image capturing device 100 or the image capturing device 100a to focus and capture the image, activates the flash module 201 for supplementary lighting, and uses the object distance information of the object 206 provided by the focus assist module 202 for rapid focusing, and the image signal processor 203 performs image optimization processing to further improve the image quality produced by the camera lens group. The focus assist module 202 can use an infrared or laser focus assist system to achieve rapid focusing. In addition, the electronic device 200 can also use the image capturing device 100b, the image capturing device 100c, or the image capturing device 100d for shooting. The display module 204 can use a touch screen to perform image capture and image processing in conjunction with the diverse functions of the image software processor 205 (or can use a physical capture button to perform image capture). The image processed by the image software processor 205 can be displayed on the display module 204.

<Example 22>

Please refer to Figure 43, which is a three-dimensional schematic diagram of one side of an electronic device according to the twenty-second embodiment of the present disclosure.

In this embodiment, the electronic device 300 is a smart phone. The electronic device 300 includes the imaging device 100 of the twentieth embodiment, the imaging device 100e, the imaging device 100f, the flash module 301, the focus assist module, the image signal processor, the display module and the image software processor (not shown). The imaging device 100, the imaging device 100e and the imaging device 100f are all arranged on the same side of the electronic device 300, and the display module is arranged on the other side of the electronic device 300. Moreover, the imaging device 100e and the imaging device 100f can both include the imaging system lens set disclosed in this disclosure and can both have a similar structural configuration as the imaging device 100, which will not be described in detail here.

The imaging device 100 is a wide-angle imaging device, the imaging device 100e is a telephoto imaging device, and the imaging device 100f is an ultra-wide-angle imaging device. The imaging device 100, the imaging device 100e, and the imaging device 100f of this embodiment have different viewing angles, so that the electronic device 300 can provide different magnifications to achieve the optical zoom shooting effect. In addition, the imaging device 100e is a telephoto imaging device with an optical path bending element configuration, so that the total length of the imaging device 100e is not limited by the thickness of the electronic device 300. Among them, the optical path bending element configuration of the imaging device 100e can, for example, have a structure similar to Figures 59 to 61, and the above description corresponding to Figures 59 to 61 can be referred to, and no further description is given here. The electronic device 300 mentioned above includes multiple imaging devices 100, 100e, and 100f, but the number and configuration of the imaging devices are not intended to limit the present disclosure. When the user takes a photo of the subject, the electronic device 300 uses the imaging device 100, the imaging device 100e, or the imaging device 100f to focus light and capture images, activates the flash module 301 for fill light, and performs subsequent processing in a manner similar to the aforementioned embodiment, which will not be elaborated here.

<Example 23>

Please refer to Figure 44, which is a three-dimensional schematic diagram of one side of an electronic device according to the twenty-third embodiment of the present disclosure.

In this embodiment, the electronic device 400 is a smart phone and includes the imaging device 100, imaging device 100g, imaging device 100h, imaging device 100i, imaging device 100j, imaging device 100k, imaging device 100m, imaging device 100n, imaging device 100p, flash module 401, focus assist module, image signal processor, display module and image software processor (not shown) of the twentieth embodiment. The imaging device 100, the imaging device 100g, the imaging device 100h, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n and the imaging device 100p are all arranged on the same side of the electronic device 400, and the display module is arranged on the other side of the electronic device 400. Moreover, the imaging device 100g, the imaging device 100h, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n and the imaging device 100p can all include the imaging system lens set disclosed in the present invention and can all have a similar structural configuration as the imaging device 100, which will not be described in detail here.

The imaging device 100 is a wide-angle imaging device, the imaging device 100g is a telephoto imaging device, the imaging device 100h is a telephoto imaging device, the imaging device 100i is a wide-angle imaging device, the imaging device 100j is an ultra-wide-angle imaging device, the imaging device 100k is an ultra-wide-angle imaging device, the imaging device 100m is a telephoto imaging device, the imaging device 100n is a telephoto imaging device, and the imaging device 100p is a time-of-flight ranging imaging device. The imaging device 100, imaging device 100g, imaging device 100h, imaging device 100i, imaging device 100j, imaging device 100k, imaging device 100m and imaging device 100n of the present embodiment have different viewing angles, so that the electronic device 400 can provide different magnifications to achieve the shooting effect of optical zoom. In addition, the imaging device 100g and the imaging device 100h can be a telephoto imaging device with an optical path bending element configuration. Among them, the optical path bending element configuration of the imaging device 100g and the imaging device 100h can, for example, have a structure similar to Figures 59 to 61, and the description of the corresponding Figures 59 to 61 mentioned above can be referred to, and will not be repeated here. In addition, the imaging device 100p can obtain depth information of the image. The electronic device 400 includes a plurality of imaging devices 100, 100g, 100h, 100i, 100j, 100k, 100m, 100n, and 100p, but the number and configuration of the imaging devices are not intended to limit the present disclosure. When the user takes a photo of the subject, the electronic device 400 uses the imaging device 100, the imaging device 100g, the imaging device 100h, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, or the imaging device 100p to focus and capture the image, activates the flash module 401 for fill light, and performs subsequent processing in a manner similar to the aforementioned embodiment, which will not be described in detail here.

The imaging device disclosed herein is not limited to being applied to smart phones. The imaging device can also be applied to a mobile focus system as required, and has the characteristics of excellent aberration correction and good imaging quality. For example, the imaging device can be applied in many aspects to electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile devices, digital tablets, smart TVs, network monitoring equipment, dash cams, reversing display devices, multi-lens devices, identification systems, somatosensory game consoles and wearable devices. The aforementioned electronic devices are only exemplary examples of the actual application of the present disclosure, and do not limit the scope of application of the imaging device disclosed herein.

Although the present disclosure is disclosed as above with the aforementioned preferred embodiment, it is not intended to limit the present disclosure. Anyone familiar with similar techniques can make some changes and modifications within the spirit and scope of the present disclosure. Therefore, the patent protection scope of the present disclosure shall be subject to the scope of the patent application attached to this specification.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p: Imaging device

101: Imaging lens

102: Driving device

103: Electronic photosensitive element

104: Image stabilization module

200, 300, 400: Electronic devices

201, 301, 401: Flash light module

202: Focus assist module

203: Image signal processor

204: Display module

205: Image software processor

206: Subject

OA1: First optical axis

OA2: Second optical axis

OA3: The third optical axis

LF: Light path bending element

LF1: First optical path deflection element

LF2: Second optical path deflection element

LG: Lens group

Lb: base

Lm: sub-wavelength microstructure

Ls: substrate surface

ST: aperture

S1: Optical beam

E1: First lens

E2: Second lens

E3: Third lens

E4: The fourth lens

E5: Fifth lens

E6: Sixth lens

E7: Seventh lens

E8: Eighth lens

E9: Filter element

E10: Flat glass

IMG: Imaging surface

IS: Electronic photosensitive element

CTc1: The thickness of the pure refractive lens closest to the object side in the imaging system lens group on the optical axis

CTLc: The thickness of the pure refractive lens closest to the imaging surface in the imaging system lens group on the optical axis

D: The diameter of the cross section of the nanorod unit structure

|Dist|_max: The maximum absolute value of the distortion aberration on the imaging surface under each field of view

Dmax: Maximum diameter of the cross section of the nanorod

Dmin: minimum diameter of the cross section of the nanorod

f: Focal length of the camera lens group

f1: Focal length of the first lens

fc1: The focal length of the pure refractive lens closest to the object side in the imaging system lens group

fc2: The focal length of the second pure refractive lens closest to the object side in the imaging system lens group

Fno: The aperture value of the camera lens group

H: Height of sub-wavelength microstructure perpendicular to the surface of the substrate

HFOV: half of the maximum viewing angle of the imaging system lens set

ImgH: Maximum imaging height of the camera lens assembly

L: Length of the nanofin unit structure

ML: The distance from the super-slim surface closest to the object side of the imaging system lens set to the imaging plane on the optical axis

Nm: The refractive index of the material of the sub-wavelength microstructure of the super-surface

Ns: The refractive index of the material used as the base of the super lens

P: The distance between the centers of two adjacent periodic structures in the sub-wavelength microstructure

R1: Radius of curvature of the object side surface of the first lens

Rc1i: The radius of curvature of the image-side surface of the pure refractive lens closest to the object side in the imaging system lens group

Rc1o: The radius of curvature of the object-side surface of the pure refractive lens closest to the object side in the imaging system lens group

RLci: The radius of curvature of the image-side surface of the pure refractive lens closest to the imaging surface in the imaging system lens group

|SAGLci|: The distance from the intersection of the image-side surface of the pure refractive lens closest to the imaging surface in the imaging system lens group on the optical axis to the maximum effective radius position of the image-side surface of the pure refractive lens closest to the imaging surface parallel to the optical axis

T23: The distance between the second lens and the third lens on the optical axis

TD: The distance on the optical axis from the object side surface of the first lens to the image side surface of the last lens closest to the imaging plane

TL: The distance from the object side surface of the first lens to the imaging plane on the optical axis

Vcmax: The maximum Abbe number of all pure refractive lens materials in the camera lens group

Vcmin: The minimum Abbe number of all pure refractive lens materials in the camera lens set

Vmin: The minimum Abbe number of all pure refractive lens materials and all super lens base materials in the camera system lens set

W: Width of the nanofin unit structure

Ym_max: The maximum value of the maximum effective radius of the super-surface with sub-wavelength microstructure in the lens assembly of the camera system

θ: Structural rotation angle of the nanofin unit structure

θm: Maximum angle of the edge light of the maximum field of view incident on the super-surface

λ0: reference wavelength

FIG1 is a schematic diagram of an imaging device according to the first embodiment of the present disclosure.

Figure 2 shows the spherical aberration, astigmatism and distortion curves of the first embodiment from left to right.

FIG3 is a schematic diagram of an imaging device according to the second embodiment of the present disclosure.

Figure 4 shows the spherical aberration, astigmatism and distortion curves of the second embodiment from left to right.

FIG5 is a schematic diagram of an imaging device according to the third embodiment of the present disclosure.

Figure 6 shows the spherical aberration, astigmatism and distortion curves of the third embodiment from left to right.

FIG7 is a schematic diagram of an imaging device according to the fourth embodiment of the present disclosure.

Figure 8 shows the spherical aberration, astigmatism and distortion curves of the fourth embodiment from left to right.

FIG9 is a schematic diagram of an imaging device according to the fifth embodiment of the present disclosure.

Figure 10 shows the spherical aberration, astigmatism and distortion curves of the fifth embodiment from left to right.

FIG11 is a schematic diagram of an imaging device according to the sixth embodiment of the present disclosure.

Figure 12 shows the spherical aberration, astigmatism and distortion curves of the sixth embodiment from left to right.

FIG13 is a schematic diagram of an imaging device according to the seventh embodiment of the present disclosure.

Figure 14 shows the spherical aberration, astigmatism and distortion curves of the seventh embodiment from left to right.

FIG15 is a schematic diagram of an imaging device according to the eighth embodiment of the present disclosure.

Figure 16 shows the spherical aberration, astigmatism and distortion curves of the eighth embodiment from left to right.

FIG17 is a schematic diagram of an imaging device according to the ninth embodiment of the present disclosure.

Figure 18 shows the spherical aberration, astigmatism and distortion curves of the ninth embodiment from left to right.

FIG19 is a schematic diagram of an imaging device according to the tenth embodiment of the present disclosure.

Figure 20 shows the spherical aberration, astigmatism and distortion curves of the tenth embodiment from left to right.

FIG21 is a schematic diagram of an imaging device according to the eleventh embodiment of the present disclosure.

Figure 22 shows the spherical aberration, astigmatism and distortion curves of the eleventh embodiment from left to right.

FIG23 is a schematic diagram of an imaging device according to the twelfth embodiment of the present disclosure.

Figure 24 shows the spherical aberration, astigmatism and distortion curves of the twelfth embodiment from left to right.

FIG25 is a schematic diagram of an imaging device according to the thirteenth embodiment of the present disclosure.

Figure 26 shows the spherical aberration, astigmatism and distortion curves of the thirteenth embodiment from left to right.

FIG27 is a schematic diagram of an imaging device according to the fourteenth embodiment of the present disclosure.

Figure 28 shows the spherical aberration, astigmatism and distortion curves of the fourteenth embodiment from left to right.

FIG29 is a schematic diagram of an imaging device according to the fifteenth embodiment of the present disclosure.

Figure 30 shows the spherical aberration, astigmatism and distortion curves of the fifteenth embodiment from left to right.

FIG31 is a schematic diagram of an imaging device according to the sixteenth embodiment of the present disclosure.

Figure 32 shows the spherical aberration, astigmatism and distortion curves of the sixteenth embodiment from left to right.

FIG33 is a schematic diagram of an imaging device according to the seventeenth embodiment of the present disclosure.

Figure 34 shows the spherical aberration, astigmatism and distortion curves of the seventeenth embodiment from left to right.

FIG35 is a schematic diagram of an imaging device according to the eighteenth embodiment of the present disclosure.

Figure 36 shows the spherical aberration, astigmatism and distortion curves of the eighteenth embodiment from left to right.

FIG37 is a schematic diagram of an imaging device according to the nineteenth embodiment of the present disclosure.

Figure 38 shows the spherical aberration, astigmatism and distortion curves of the nineteenth embodiment from left to right.

FIG39 is a three-dimensional schematic diagram of an imaging device according to the twentieth embodiment of the present disclosure.

FIG40 is a three-dimensional schematic diagram of one side of an electronic device according to the twenty-first embodiment of the present disclosure.

FIG41 is a three-dimensional schematic diagram showing another side of the electronic device of FIG40.

FIG42 shows a system block diagram of the electronic device of FIG40.

FIG43 is a three-dimensional schematic diagram of one side of an electronic device according to the twenty-second embodiment of the present disclosure.

FIG44 is a three-dimensional schematic diagram of one side of an electronic device according to the twenty-third embodiment of the present disclosure.

FIG. 45 is a schematic diagram showing the parameters TL and ML in the first embodiment of the present disclosure.

FIG. 46 is a schematic diagram of the third lens of FIG. 45 and illustrates the parameter θm at the image-side surface of the third lens as a super-surface according to the first embodiment of the present disclosure.

FIG. 47 is a schematic diagram showing the parameters |SAGLci| and CTLc according to the first embodiment of the present disclosure.

FIG. 48 is a schematic top view of a nanofin according to the present disclosure.

Figure 49 is a three-dimensional schematic diagram of the unit structure of the nanofin in Figure 48.

FIG. 50 is a schematic top view of a nanopillar according to the present disclosure.

Figure 51 is a three-dimensional schematic diagram of the unit structure of the nanorod in Figure 50.

FIG. 52 shows the relationship between the phase and radial coordinates of the object side surface of the third lens as a super-surface in the first embodiment of the present disclosure.

FIG. 53 is a schematic top view of a nanofin according to one embodiment of the present disclosure.

FIG. 54 is a schematic top view of a nanorod in another embodiment of the present disclosure.

Figure 55 shows a partial top view of the nanofin according to the first embodiment of the present disclosure.

FIG. 56 shows the simulation results of the rotation angle of the unit structure of the nanofin relative to the transmittance and phase in the first embodiment of the present disclosure.

Figure 57 shows a partial top view of the nanorod in the first embodiment of the present disclosure.

FIG. 58 shows the simulation results of the cylindrical diameter of the unit structure of the nanorod relative to the transmittance and phase according to the first embodiment of the present disclosure.

FIG. 59 is a schematic diagram showing a configuration relationship of an optical path deflection element in a lens assembly of an imaging system according to the present disclosure.

FIG60 is a schematic diagram showing another configuration relationship of the optical path deflection element in the lens assembly of the imaging system according to the present disclosure.

FIG61 is a schematic diagram showing a configuration relationship of two optical path deflection elements in a lens assembly of an imaging system according to the present disclosure.

1: Image capturing device ST: Aperture E1: First lens E2: Second lens E3: Third lens E4: Fourth lens E5: Fifth lens E6: Sixth lens E9: Filter element IMG: Imaging surface IS: Electronic photosensitive element

Claims (40)

A camera lens set includes at least four lenses, wherein the at least four lenses are sequentially arranged from the object side to the image side along an optical path, namely, a first lens, a second lens, at least one subsequent lens, and a last lens closest to an imaging surface, and the at least four lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction; wherein at least one surface from the image side surface of the second lens to the object side surface of the last lens is a metasurface having a sub-wavelength microstructure; wherein the focal length of the camera lens set is f, and the lens closest to the image side in the camera lens set is The focal length of the pure refractive lens on the object side is fc1, the maximum imaging height of the lens group of the imaging system is ImgH, the radius of curvature of the object side surface of the first lens is R1, and the focal length of the first lens is f1, which meets the following conditions: 0.015<f/|fc1|<20.00; 0.03<f/|R1|<30.00; and 0.05<|ImgH/f1|<10.00; wherein, the maximum angle of the edge light of the maximum field of view incident on the super-elastic surface is θm, and the following conditions are met at the super-elastic surface closest to the object side: θm<40.0[degrees]. The imaging system lens set as described in claim 1, wherein the minimum Abbe number of all pure refractive lens materials in the imaging system lens set is Vcmin, which satisfies the following condition: 6.0<Vcmin<50.0. The imaging system lens set as described in claim 1, wherein at least one lens among the second lens, the at least one subsequent lens and the last lens is a super-smooth lens, the super-smooth lens has the super-smooth surface, the super-smooth lens includes a substrate and the sub-wavelength microstructure formed on the substrate, the super-smooth surface includes the surface of the substrate and the sub-wavelength microstructure formed on the surface of the substrate, the surface of the substrate is a plane, the height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, the reference wavelength is λ0, and it satisfies the following conditions: 0.40<H/λ0<2.20. The imaging system lens set as described in claim 1, wherein at least one lens among the second lens, the at least one subsequent lens and the last lens is a super-smooth lens, the super-smooth lens has the super-smooth surface, the super-smooth lens includes a substrate and the sub-wavelength microstructure formed on the substrate, the super-smooth surface includes the surface of the substrate and the sub-wavelength microstructure formed on the surface of the substrate, the surface of the substrate is a plane, at least one lens among the at least four lenses is a pure refractive lens, and the at least one pure refractive lens is made of plastic material and its object side surface and its image side surface are both aspheric. The imaging system lens set as described in claim 1, wherein the distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, and the maximum imaging height of the imaging system lens set is ImgH, which satisfies the following conditions: 1.40<TL/ImgH<15.00. The imaging system lens set as described in claim 1, wherein the sub-wavelength microstructure is a nanofin, and the cross-section of the nanofin has different rotation angles at different positions on the lens surface. The imaging system lens set as described in claim 1, wherein the sub-wavelength microstructure is a nanopillar, and the cross-section of the nanopillar has different sizes at different locations on the lens surface. The imaging system lens set as described in claim 7, wherein at least one of the second lens, the at least one subsequent lens and the last lens is a super-slim lens, the super-slim lens has the super-slim surface, the super-slim lens includes a substrate and the sub-wavelength microstructure formed on the substrate, the super-slim surface includes the surface of the substrate and the sub-wavelength microstructure formed on the surface of the substrate, the surface of the substrate is a plane, the height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, and the minimum diameter of the cross section of the nanorod is Dmin, which meets the following conditions: 4.00<H/Dmin<40.00. The imaging system lens set as described in claim 7, wherein at least one lens among the second lens, the at least one subsequent lens and the last lens is a super-smooth lens, the super-smooth lens has the super-smooth surface, the super-smooth lens includes a substrate and the sub-wavelength microstructure formed on the substrate, the super-smooth surface includes the surface of the substrate and the sub-wavelength microstructure formed on the surface of the substrate, the surface of the substrate is a plane, the height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, and the maximum diameter of the cross section of the nanorod is Dmax, which meets the following conditions: 1.50<H/Dmax<10.00. An imaging device comprises: an imaging system lens set as described in claim 1; and an electronic photosensitive element disposed on the imaging surface of the imaging system lens set. An electronic device, comprising: an imaging device as described in claim 10. A camera lens set includes at least three lenses, and the at least three lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction; wherein at least one lens among the at least three lenses is a pure refractive lens, and at least another lens among the at least three lenses is a metalens lens, and at least one of the object side surface and the image side surface of the metalens lens is a metalens surface, and the metalens lens includes a substrate and The sub-wavelength microstructure is formed on the substrate, the super-slim surface includes the surface of the substrate and the sub-wavelength microstructure formed on the surface of the substrate, and the surface of the substrate is a plane; wherein the at least three lenses include at least three lenses closest to the object side, and the three lenses are sequentially a first lens, a second lens, and a third lens along the optical path from the object side to the image side, the focal length of the imaging system lens set is f, and the pure refractive lens closest to the object side in the imaging system lens set is The focal length is fc1, the distance from the super-slim surface closest to the object side in the imaging system lens set to the imaging plane on the optical axis is ML, the distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, the interval distance between the second lens and the third lens on the optical axis is T23, the distance from the object side surface of the first lens to the image side surface of the last lens closest to the imaging plane on the optical axis is TD, all pure refractive lens materials and all super-slim lenses in the imaging system lens set are The minimum Abbe number of the base material of the lens is Vmin, which meets the following conditions: 0.015<f/|fc1|<20.00; 0.05<ML/TL<0.98; 0.005<T23/TD<0.80; and Vmin<30.0; wherein the maximum angle of the edge light of the maximum field of view incident on the super-elastic surface is θm, and the following conditions are met at the super-elastic surface closest to the imaging surface: θm<32.0[degrees]. The imaging system lens set as described in claim 12, wherein the distance from the intersection of the image side surface of the pure refractive lens closest to the imaging plane in the imaging system lens set on the optical axis to the maximum effective radius position of the image side surface of the pure refractive lens closest to the imaging plane parallel to the optical axis is |SAGLci|, and the thickness of the pure refractive lens closest to the imaging plane in the imaging system lens set on the optical axis is CTLc, which meets the following conditions: 0.05<|SAGLci|/CTLc<7.00. The imaging system lens set as described in claim 12, wherein the focal length of the imaging system lens set is f, and the focal length of the pure refractive lens closest to the object side in the imaging system lens set is fc1, which satisfies the following condition: 0.015<f/|fc1|<15.00. An imaging system lens set as described in claim 14, wherein the lens closest to the object side in the imaging system lens set is a pure refractive lens and has negative refractive power. The imaging system lens set as described in claim 15, wherein half of the maximum viewing angle in the imaging system lens set is HFOV, which satisfies the following conditions: 40.0 [degrees] < HFOV < 120.0 [degrees]. The imaging system lens set as described in claim 14, wherein the curvature radius of the object side surface of the pure refractive lens closest to the object side in the imaging system lens set is Rc1o, and the curvature radius of the image side surface of the pure refractive lens closest to the object side in the imaging system lens set is Rc1i, which satisfies the following condition: -30.00<(Rc1o-Rc1i)/(Rc1o+Rc1i)<0.30. The imaging system lens set as described in claim 17, wherein the maximum absolute value of the distortion aberration on the imaging plane in each field of view is |Dist|_max, which satisfies the following conditions: |Dist|_max<10.0%. The imaging system lens set as described in claim 17, wherein at least one of the at least another lens serving as the super-slim lens has both an object-side surface and an image-side surface that are super-slim surfaces having a sub-wavelength microstructure. An imaging system lens set as described in claim 12, wherein the imaging system lens set comprises at least two pure refractive lenses; wherein the focal length of the pure refractive lens closest to the object side in the imaging system lens set is fc1, and the focal length of the pure refractive lens second closest to the object side in the imaging system lens set is fc2, which satisfies the following condition: -10.00<fc1/fc2<0.03. The imaging system lens set as described in claim 12, wherein the operating wavelength band of the imaging system lens set is visible light. An imaging system lens set as described in claim 12, wherein the image side surface of the pure refractive lens closest to the imaging plane in the imaging system lens set is concave near the optical axis. The imaging system lens set as described in claim 12, wherein the refractive index of the material of the sub-wavelength microstructure of the super-surface is Nm, the refractive index of the material of the substrate of the super-lens is Ns, and all super-surfaces in the imaging system lens set meet the following conditions: 0.50<Nm-Ns<2.50. An imaging system lens set as described in claim 12, wherein the sub-wavelength microstructure is arranged in a hexagonal periodic array on the surface of the substrate. A camera lens assembly includes a plurality of lenses, wherein the lenses include at least a first lens closest to the object side and at least one subsequent lens, and the lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction; wherein the first lens is a pure refractive lens, and at least one lens among the at least one subsequent lens is a super-slim lens, and at least one of the object side surface and the image side surface of the super-slim lens is a super-slim surface, and the super-slim lens includes a substrate and the sub-wavelength microstructure formed on the substrate, and the super-slim surface includes the surface of the substrate and the sub-wavelength microstructure formed on the surface of the substrate, and the surface of the substrate is a plane; wherein the camera lens assembly includes a first lens closest to the object side and at least one subsequent lens, and the first lens includes a second lens closest to the object side and at least one subsequent lens, and the second ... The focal length of the whole lens set is f, the focal length of the pure refractive lens closest to the object side in the imaging system lens set is fc1, the minimum Abbe number of the base material of all pure refractive lens materials and all superlenses in the imaging system lens set is Vmin, the thickness of the pure refractive lens closest to the object side in the imaging system lens set on the optical axis is CTc1, and the curvature radius of the image side surface of the pure refractive lens closest to the imaging surface in the imaging system lens set is RLci, which meets the following conditions: 0.015<f/|fc1|<20.00; 6.0<Vmin<20.0; and 0.01<CTc1/|RLci|<30.00. The imaging system lens set as described in claim 25, wherein the refractive index of the material of the sub-wavelength microstructure of the metasurface is Nm, and all metasurfaces in the imaging system lens set meet the following conditions: 1.600<Nm<3.500. The imaging system lens set as described in claim 25, wherein the longitudinal spherical aberration at the imaging plane is between -0.10 mm and 0.10 mm at each field of view in the visible light band. The imaging system lens set as described in claim 25, wherein the maximum value of the maximum effective radius of the super-surface having the sub-wavelength microstructure in the imaging system lens set is Ym_max, and the maximum imaging height of the imaging system lens set is ImgH, which satisfies the following conditions: 0.10<Ym_max/ImgH<0.75. The camera lens set as described in claim 25, wherein the height of the sub-wavelength microstructure perpendicular to the surface of the substrate is H, and the distance between the centers of two adjacent periodic structures in the sub-wavelength microstructure is P, which satisfies the following conditions: 1.25<H/P<10.00. The imaging system lens set as described in claim 25, wherein the maximum angle of the edge light of the maximum field of view incident on the super-surface is θm, and the following conditions are satisfied at the super-surface having the sub-wavelength microstructure: 0.0 [degrees] < θm < 60.0 [degrees]. The imaging system lens set as described in claim 25, wherein the lenses include at least the first lens closest to the object side and the second lens, the second lens is adjacent to the first lens on the image side of the first lens, there is no other lens between the first lens and the second lens, and the image side surface of the second lens is concave near the optical axis. A camera lens assembly includes at least five lenses, wherein the at least five lenses are sequentially arranged from the object side to the image side along an optical path, namely, a first lens, a second lens, at least two subsequent lenses, and a last lens closest to an imaging surface, and the at least five lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction; wherein at least one lens among the at least five lenses is a pure refractive lens, and at least another lens among the at least five lenses is a superfine lens, At least one of the image-side surfaces of the second lens to the last lens is a super-surface having a sub-wavelength microstructure, and the image-side surface of the pure refractive lens closest to the imaging surface in the imaging system lens set is a concave surface near the optical axis; wherein the focal length of the imaging system lens set is f, and the focal length of the pure refractive lens closest to the object side in the imaging system lens set is fc1, which meets the following conditions: 0.015<f/|fc1|<20.00. The imaging system lens set as described in claim 32, wherein the object side surface of the second lens is convex near the optical axis. The imaging system lens set as described in claim 32, wherein the distance between the centers of two adjacent periodic structures in the sub-wavelength microstructure is P, and the reference wavelength is λ0, which satisfies the following conditions: 0.05<P/λ0<0.80. The imaging system lens set as described in claim 32, wherein the imaging system lens set comprises at least two pure refractive lenses; wherein the maximum Abbe number of all the pure refractive lens materials in the imaging system lens set is Vcmax, and the minimum Abbe number of all the pure refractive lens materials in the imaging system lens set is Vcmin, which satisfies the following conditions: 1.10<Vcmax/Vcmin<5.20. The camera lens set as described in claim 32, wherein the maximum value of the maximum effective radius of the super-surface having the sub-wavelength microstructure in the camera lens set is Ym_max, which satisfies the following condition: Ym_max<4.00 [mm]. The imaging system lens set as described in claim 32, wherein the maximum angle of the edge light of the maximum field of view incident on the super-surface is θm, and the following conditions are satisfied at the super-surface closest to the imaging surface: 0.0 [degrees] < θm < 40.0 [degrees]. The camera lens set as described in claim 32, wherein the sub-wavelength microstructure of the super-surface in the camera lens set is a dielectric material. An imaging device comprises: an imaging system lens assembly as described in claim 32; and an electronic photosensitive element disposed on the imaging surface of the imaging system lens assembly. An electronic device, comprising: an imaging device as described in claim 39 _.