CN112817126B - Optical imaging lens, image capturing device and electronic equipment - Google Patents

Abstract

This applicationThe optical imaging lens sequentially comprises a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens, a fifth lens, a sixth lens with positive refractive power and a seventh lens with negative refractive power from an object side to an image side along an optical axis; the optical imaging lens satisfies the following relational expression: -0.3mm^‑1<tan(FOV)/TTL<‑0.2mm^‑1(ii) a Wherein tan (fov) is a tangent value of a maximum field angle of the optical imaging lens, and TTL is a distance on the optical axis from the object-side surface of the first lens element to the imaging surface of the optical imaging lens. The optical imaging lens is beneficial to eliminating the aberration in the optical imaging lens, realizes mutual correction of the aberration among the lenses, improves the resolving power of the optical imaging lens, enables the optical imaging lens to well capture the detailed characteristics of a shot object, obtains high-quality imaging, and improves the imaging definition.

Description

Optical imaging lens, imaging device and electronic equipment

technical field

The present application relates to the technical field of optical imaging, and in particular, to an optical imaging lens, an imaging device and electronic equipment.

Background technique

With the development of technology, electronic devices with camera functions are more and more widely used. The continuous improvement of the shooting effect of the camera lens has even become the focus of people's expectations for technological progress, especially with the popularization of smart electronic devices in life, providing a variety of shooting experiences on miniaturized electronic devices, and even achieving professional camera effects has become people's concern. The urgent need for electronic equipment.

It is difficult for the camera lens in the traditional technology to have a high imaging resolution on the premise of satisfying the miniaturization of the structure.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide an optical imaging lens, an imaging device and an electronic device for how to improve the imaging clarity of the lens.

In a first aspect, an embodiment of the present application provides an optical imaging lens, the optical imaging lens includes sequentially from the object side to the image side along the optical axis: a first lens having a negative refractive power; a second lens having a positive refractive power, The object side of the second lens is convex at the near optical axis, and the image side of the second lens is concave at the near optical axis; the third lens has positive refractive power, and the object side of the third lens is convex at the near optical axis , the image side of the third lens is convex at the near optical axis; the fourth lens has refractive power, and the object side of the fourth lens is concave at the near optical axis; the fifth lens has refractive power; the sixth lens has refractive power Positive refractive power, the image side of the sixth lens is convex at the near optical axis; the seventh lens has negative refractive power, the object side of the seventh lens is convex at the near optical axis, and the image side of the seventh lens is at the low beam. The axis is concave; the optical imaging lens satisfies the following relationship: -0.3mm ^-1 <tan(FOV)/TTL<-0.2mm ^-1 ; where tan(FOV) is the tangent of the maximum field of view of the optical imaging lens , TTL is the distance on the optical axis from the object side of the first lens to the imaging plane of the optical imaging lens.

Based on the optical imaging lens in the embodiment of the present application, by reasonably configuring the refractive power, surface shape, and arrangement and combination order of the first lens to the seventh lens, it is beneficial to eliminate the aberration inside the optical imaging lens and realize the aberration between the lenses. The mutual correction of the optical imaging lens improves the resolution of the optical imaging lens, so that it can well capture the details of the subject, obtain high-quality imaging, and improve imaging clarity. In addition, satisfying the above relational expression can make the structure of the optical imaging lens miniaturized and have a larger angle of view, which is also beneficial to the correction of aberrations. However, if the upper limit of the relational expression is exceeded, the overall structure of the optical imaging lens is too compact, aberration correction is difficult, and it is difficult to ensure imaging clarity. On the contrary, if the lower limit of the relational expression is exceeded, the overall structure of the optical imaging lens is too long, which does not meet the requirements of miniaturization design.

In one embodiment, the optical imaging lens satisfies the following relationship: VdL1>50; VdL2<50; 2<VdL1/VdL2<3; wherein, VdL1 is the Abbe number of the first lens, and VdL2 is the Abbe number of the second lens number of shells.

Based on the above embodiment, by reasonably configuring the Abbe numbers of the first lens and the second lens, the first lens and the second lens can be designed with high dispersion material and low dispersion material respectively, which is beneficial to the first lens and the second lens. The dispersion of the lenses is compensated for each other, and the first lens and the second lens have negative refractive power and positive refractive power respectively, and the opposite axial chromatic aberrations produced by the two can cancel each other to achieve the purpose of eliminating chromatic aberration.

In one of the embodiments, the optical imaging lens satisfies the following relationship: -1.2<f1/f<-0.8; wherein, f1 is the effective focal length of the first lens, and f is the effective focal length of the optical imaging lens.

Based on the above embodiment, the first lens largely determines the amount of object space information that can be obtained by the optical imaging lens. When the above relationship is satisfied, the negative refractive power of the first lens can be obtained after being constrained by the effective focal length of the lens. Good regulation can achieve reasonable divergence of the light from the object space, which is beneficial to expand the field of view of the optical imaging lens. Especially for optical imaging lenses with wide-angle or even ultra-wide-angle characteristics, when the above relationship is satisfied, the optical distortion in the optical imaging lens can be effectively corrected, the imaging quality can be guaranteed, and the machinability of the optical imaging lens can be improved. If the configuration relationship between the focal length f1 of the first lens and the effective focal length f of the optical imaging lens exceeds the range of the above relationship, the optical distortion in the optical imaging lens will be too large, the image quality will be poor, and the optical imaging lens will be increased. The sensitivity of the molding yield results in a large standard deviation of the optical imaging lens during processing, and it is difficult to control the optimization direction of the processing. For the ultra-wide-angle lens, the above defects will be more obvious.

In one of the embodiments, the optical imaging lens satisfies the following relationship: 120°≤FOV≤122°; wherein, FOV is the maximum field angle of the optical imaging lens.

Based on the above-mentioned embodiment, satisfying the above-mentioned relational expression can enable the optical imaging lens to have ultra-wide-angle characteristics and meet the shooting requirements for a wide field of view.

In one of the embodiments, the optical imaging lens satisfies the following relation: -1<f6/f7<0; wherein, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens.

Based on the above embodiment, since the sixth lens has a positive refractive power, which is conducive to light gathering, and the seventh lens has a negative refractive power, which makes the light divergent, satisfying the above relationship can reasonably control the convergence and divergence capabilities of the last two lenses of the lens. Expand the size of the effective imaging area on the imaging surface to meet the system's requirements for large images and height, and at the same time, it can also effectively compress the volume of the optical imaging lens to meet the miniaturization requirements, and analyze the aberration and field curvature of the entire optical imaging lens. good calibration.

In one of the embodiments, the optical imaging lens satisfies the following relationship: 2mm<SDL1/rad(FOV)<3mm; wherein, SDL1 is the maximum effective aperture of the object side of the first lens, and rad(FOV) is the The maximum field of view in radians.

Based on the above embodiment, since the maximum effective aperture and focal length of the first lens largely determine the size of the field of view, satisfying the above relationship can ensure that a large enough range of light information enters the optical imaging lens for imaging. However, if the upper limit of the relational expression is exceeded, the field of view of the optical imaging lens will be too small, which cannot meet the needs of a wide range of shooting. On the contrary, if the lower limit of the relation is exceeded, the imaging distortion in the optical imaging lens will be serious, and the captured image will be distorted.

In one of the embodiments, the optical imaging lens satisfies the following relationship: 2<TTL/f<3.2; wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and f is the optical axis The effective focal length of the imaging lens.

Based on the above embodiments, by reasonably controlling the effective focal length and total length of the optical imaging lens, not only the miniaturization of the optical imaging lens can be realized, but also the light can be better converged on the imaging surface. If it exceeds the upper limit of the relational expression, the total length of the optical imaging lens is too long, the angle of the chief ray when the light enters the imaging surface is too large, and the edge light of the imaging surface cannot be imaged normally, resulting in incomplete imaging information. On the contrary, if the lower limit of the relation is exceeded, the total length of the optical imaging lens is too short, and the imaging sensitivity increases, which is not conducive to the convergence of light on the imaging surface.

In one embodiment, the optical imaging lens satisfies the following relationship: 2<Imgh/f<4; where Imgh is the image height corresponding to the maximum field angle of the optical imaging lens, and f is the effective focal length of the optical imaging lens.

Based on the above-mentioned embodiments, satisfying the above-mentioned relational expressions can make the optical imaging lens have a larger depth of field, and meanwhile, the imaging sharpness can meet the requirements. If the upper limit of the relational expression is exceeded, the sharpness of the distant scene will be insufficient, which will affect the imaging effect. Conversely, if the lower limit of the relation is exceeded, the field of view of the optical imaging lens is too small to capture a wide range of scenes.

In one embodiment, the optical imaging lens satisfies the following relationship: FBL/TTL>0.15; wherein, FBL is the shortest distance from the image side of the seventh lens to the imaging plane of the optical imaging lens in a direction parallel to the optical axis, TTL is the distance from the object side of the first lens to the imaging plane of the optical imaging lens on the optical axis.

Based on the above embodiment, satisfying the above relationship can make the optical imaging lens meet the requirements of miniaturization and have a sufficient focusing range, improve the assembly yield of the optical imaging lens, and at the same time ensure that the focal depth of the optical imaging lens is large, and can obtain objects. More in-depth information on the side. If the lower limit of the relation is exceeded, the tolerance in the assembly process of the optical imaging lens is too small, resulting in a low yield rate and increasing production difficulty, and the depth of focus of the optical imaging lens cannot be guaranteed, resulting in poor imaging quality.

In one of the embodiments, the optical imaging lens satisfies the following relationship: -2<f3/R7<-1; wherein, f3 is the effective focal length of the third lens, and R7 is the curvature of the image side of the third lens at the optical axis radius.

Based on the above-mentioned embodiment, satisfying the above-mentioned relational expression is beneficial to shorten the overall length of the optical imaging lens and meet the requirements of miniaturization design.

In one embodiment, the optical imaging lens satisfies the following relationship: 1.5mm≤SDL1/FNO<3mm; wherein, SDL1 is the maximum effective aperture of the object side of the first lens, and FNO is the aperture number of the optical imaging lens.

Based on the above-mentioned embodiment, by reasonably configuring the maximum effective aperture of the object side of the first lens and the aperture number of the optical imaging lens, the optical imaging lens can be guaranteed to have the best light throughput and picture clarity. However, if the upper limit of the relational expression is exceeded, the field of view of the optical imaging lens will be too small, making it impossible to capture a wide range of scenes. If the lower limit of the relation is exceeded, it will cause a decrease in the amount of light passing through the optical imaging lens, resulting in a dark image.

In one of the embodiments, the optical imaging lens satisfies the following relationship: 1mm ⁻¹ <(R3+R4)/(R3*R4)<1.5mm ⁻¹ ; wherein R3 is that the object side of the second lens is at the optical axis , and R4 is the radius of curvature of the image side of the second lens at the optical axis.

Based on the above embodiment, satisfying the above relationship can reasonably balance the optical path difference between the edge light and the paraxial light of the optical imaging lens, correct the field curvature and astigmatism in the optical imaging lens, reduce the sensitivity of the optical imaging lens, and improve the Assembly stability. However, if the upper limit of the relational expression is exceeded, the sensitivity of the optical imaging lens will increase and the production yield will be reduced. If the lower limit of the relation is exceeded, the field curvature of the system will be too large.

In one of the embodiments, the optical imaging lens satisfies the following relationship: 1mm ⁻¹ <|R14+15|/|R14*R15|<1.5mm ⁻¹ ; wherein, R14 is the object side of the seventh lens at the optical axis The curvature radius of R15 is the curvature radius of the image side of the seventh lens at the optical axis.

Based on the above-mentioned embodiment, satisfying the above-mentioned relationship can reasonably increase the incident angle of the optical imaging lens to meet the image height requirement, while reducing the sensitivity of the optical imaging lens and improving the stability of assembly.

In a second aspect, an embodiment of the present application provides an image pickup device, where the image pickup device includes the above-mentioned optical imaging lens; a photosensitive element is disposed on the image side of the optical imaging lens.

Based on the imaging device in the embodiment of the present application, since the above-mentioned optical imaging lens is used, the refractive power, surface shape, and arrangement and combination order of the first lens to the seventh lens are reasonably configured, which is beneficial to eliminate the image inside the optical imaging lens. To achieve mutual correction of the aberrations between the lenses, improve the resolution of the optical imaging lens, so that it can well capture the details of the subject, obtain high-quality imaging, and improve imaging clarity.

In a third aspect, an embodiment of the present application provides an electronic device, the electronic device includes: a casing; as described above, the imaging device is disposed on the casing.

Based on the electronic equipment in the embodiments of the present application, since the above-mentioned imaging device is adopted, it is beneficial to eliminate the aberration inside the optical imaging lens by reasonably configuring the refractive power, surface shape, and arrangement and combination order of the first lens to the seventh lens. , to achieve mutual correction of aberrations between each lens, improve the resolution of the optical imaging lens, so that it can well capture the details of the subject, obtain high-quality imaging, and improve imaging clarity.

Based on the optical imaging lens, the imaging device, and the electronic equipment in the embodiments of the present application, by reasonably configuring the refractive power, surface shape, and arrangement and combination order of the first lens to the seventh lens, it is beneficial to eliminate the aberration inside the optical imaging lens, Realize the mutual correction of aberrations between the lenses, improve the resolution of the optical imaging lens, enable it to capture the details of the subject well, obtain high-quality imaging, and improve imaging clarity.

Description of drawings

1 is a schematic structural diagram of an optical imaging lens provided in Embodiment 1 of the present application;

2 is a spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical imaging lens provided in Embodiment 1 of the present application;

3 is a schematic structural diagram of an optical imaging lens provided in Embodiment 2 of the present application;

FIG. 4 is a spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical imaging lens provided in Embodiment 2 of the present application;

5 is a schematic structural diagram of an optical imaging lens provided in Embodiment 3 of the present application;

6 is a spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical imaging lens provided in Embodiment 3 of the present application;

7 is a schematic structural diagram of an optical imaging lens provided in Embodiment 4 of the present application;

FIG. 8 is a spherical aberration diagram, an astigmatism diagram and a distortion diagram of the optical imaging lens provided in Embodiment 4 of the present application;

9 is a schematic structural diagram of an optical imaging lens provided in Embodiment 5 of the present application;

10 is a spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical imaging lens provided in Embodiment 5 of the present application;

11 is a schematic structural diagram of an optical imaging lens provided in Embodiment 6 of the present application;

12 is a spherical aberration diagram, an astigmatism diagram, and a distortion diagram of the optical imaging lens provided in Embodiment 6 of the present application;

13 is a schematic structural diagram of an imaging device provided by an embodiment of the application;

FIG. 14 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are for the purpose of describing specific embodiments only, and are not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this specification, the expressions first, second, third, etc. are only used to distinguish one feature from another feature and do not imply any limitation on the feature. Accordingly, the first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application. For ease of explanation, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are examples only and are not drawn strictly to scale.

In this specification, the space on the side where the object is located relative to the optical element is called the object side of the optical element. Correspondingly, the image formed by the object relative to the side space where the optical element is located is called the image of the optical element. side. The surface of each lens closest to the object is called the object side, and the surface of each lens closest to the imaging surface is called the image side. And define the positive direction of the distance from the object side to the image side.

In addition, in the following description, if the lens surface is convex and the position of the convex surface is not defined, it means that the surface of the lens is convex at least near the optical axis; if the surface of the lens is concave and the position of the concave surface is not defined, then Indicates that the lens surface is concave at least near the optical axis. Here, near the optical axis refers to an area near the optical axis.

The following first explains the aberrations involved in the embodiments of the present application; aberration refers to the inconsistency between the results obtained by non-paraxial ray tracing and the results obtained by paraxial ray tracing in the optical system, which is inconsistent with Gaussian optics Deviation from ideal conditions (first-order approximation theory or paraxial rays). Aberration is divided into two categories: chromatic aberration (chromatic aberration, or chromatic aberration) and monochromatic aberration (monochromatic aberration). Chromatic aberration is due to the refractive index of the lens material is a function of the wavelength. When light of different wavelengths passes through the lens, it is caused by different refractive indices. Chromatic aberration can be divided into two types: positional chromatic aberration and magnification chromatic aberration. Chromatic aberration is a kind of dispersion phenomenon. The so-called dispersion phenomenon refers to the phenomenon that the speed of light or the refractive index in the medium changes with the wavelength of the light wave. The dispersion that increases with the increase of wavelength can be called negative dispersion (or negative anomalous dispersion). Monochromatic aberration refers to the aberration that occurs even in highly monochromatic light. According to the effect, monochromatic aberration is divided into two categories: "blurring the image" and "distorting the image"; the former category has spherical Aberration (spherical aberration, may be referred to as spherical aberration), astigmatism (astigmatism), etc., the latter category includes field curvature (field curvature, may be referred to as field curvature), distortion (distortion) and so on. Aberration also includes coma, which refers to a monochromatic conical beam emitted to the optical system from an off-axis object point located outside the main axis. After being refracted by the optical system, it cannot form a clear point at the ideal plane. , but form comet-shaped spots with bright tails.

Please refer to FIG. 1 , FIG. 3 , FIG. 5 , FIG. 7 , FIG. 9 , and FIG. 11 together. An embodiment of the present application proposes an optical imaging lens 100 . The optical imaging lens 100 extends from the object side to the image side along the optical axis 110 It includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 in sequence.

The first lens L1 has a negative refractive power, and the object side S1 and the image side S2 of the first lens L1 may be concave, flat or convex at the near optical axis 110 . The second lens L2 has a positive refractive power, the object side S3 of the second lens L2 is convex at the near optical axis 110 , and the image side S4 of the second lens L2 is concave at the near optical axis 110 . The third lens L3 has positive refractive power, the object side S5 of the third lens L3 is convex at the near optical axis 110 , and the image side S6 of the third lens L3 is convex at the near optical axis 110 . The fourth lens L4 has a positive refractive power or a negative refractive power, the object side S7 of the fourth lens L4 is concave at the near optical axis 110, and the image side S8 of the fourth lens L4 can be concave at the near optical axis 110, or can be It can be flat or convex. The fifth lens L5 has positive refractive power or negative refractive power, and the object side S9 and the image side S10 of the fifth lens L5 may be concave, flat or convex at the near optical axis 110 . The sixth lens L6 has a positive refractive power, the object side S11 of the sixth lens L6 can be concave at the near optical axis 110, it can also be a plane, and can also be convex, and the image side S12 of the sixth lens L6 is at the near optical axis 110. is convex. The seventh lens L7 has negative refractive power, the object side S13 of the seventh lens L7 is convex at the near optical axis 110 , and the image side S14 of the seventh lens L7 is concave at the near optical axis 110 .

In addition, the optical imaging lens 100 satisfies the following relationship: -0.3mm ^-1 <tan(FOV)/TTL<-0.2mm ^-1 ; wherein, tan(FOV) is the tangent of the maximum angle of view of the optical imaging lens 100, TTL is the distance from the object side of the first lens L1 to the imaging surface S17 of the optical imaging lens 100 on the optical axis 110 . The maximum field of view is the field of view in the direction parallel to the diagonal of the rectangular effective pixel area in the optical imaging lens 100 . Satisfying the above relationship can make the structure of the optical imaging lens 100 miniaturized and have a larger angle of view, which is also beneficial to the correction of aberrations. tan(FOV)/TTL can be any value within the range of (-0.3mm ^-1 , -0.2mm ^-1 ), such as -0.29mm ^-1 , -0.28mm ^-1 , -0.26mm ^-1 , - 0.25mm ^-1 , -0.23mm ^-1 , -0.22mm ^-1 , -0.21mm ^-1 , etc.

Based on the above embodiment, by reasonably configuring the refractive power, surface shape, and arrangement and combination order of the first lens L1 to the seventh lens L7, it is beneficial to eliminate the aberration inside the optical imaging lens 100 and realize the mutual correction of the aberration between the lenses. , to improve the resolution of the optical imaging lens 100, so that it can well capture the details of the subject, obtain high-quality imaging, and improve imaging clarity. In addition, satisfying the above relational expression can make the structure of the optical imaging lens miniaturized and have a larger angle of view, which is also beneficial to the correction of aberrations.

Each lens can be made of a light-transmitting optical material. In order to save the cost of the optical imaging lens 100 , each lens can be made of a plastic material. The imaging quality of the optical imaging lens 100 is not only related to the cooperation between the various lenses in the lens, but also closely related to the material of each lens. Therefore, in order to improve the imaging quality of the optical imaging lens 100, each lens may also be partially or fully used. Made of glass material.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: VdL1>50; VdL2<50; 2<VdL1/VdL2<3; wherein, VdL1 is the Abbe number of the first lens L1, and VdL2 is the second lens Abbe number of L2. A material with an Abbe number greater than 50 is a high-dispersion material, and a material with an Abbe number less than 50 is a low-dispersion material. Based on the above-mentioned embodiment, by properly configuring the Abbe numbers of the first lens L1 and the second lens L2, the first lens L1 and the second lens L2 can be properly configured. The lens L1 and the second lens L2 are respectively designed with high dispersion material and low dispersion material, which is beneficial to the mutual compensation of the dispersion of the first lens L1 and the second lens L2, and the first lens L1 and the second lens L2 have negative refractive index respectively. Force and positive inflection force, both of which produce opposite axial chromatic aberrations can cancel each other out to achieve the purpose of eliminating chromatic aberration. VdL1/VdL2 can be any value within the range of (2, 3), for example, the values are 2.1, 2.2, 2.4, 2.5, 2.7, 2.8, 2.9, and so on.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: -1.2<f1/f<-0.8; where f1 is the effective focal length of the first lens L1 , and f is the effective focal length of the optical imaging lens 100 . Based on the above embodiment, the first lens L1 largely determines the amount of object space information that the optical imaging lens 100 can obtain. When the above relationship is satisfied, the negative refractive power of the first lens L1 is constrained by the effective focal length of the lens. Afterwards, good regulation can be obtained, so that a reasonable divergence of light from the object space can be realized, which is beneficial to expand the field of view of the optical imaging lens 100 . In particular, for the optical imaging lens 100 with wide-angle or even ultra-wide-angle characteristics, when the above relational conditions are satisfied, the optical distortion in the optical imaging lens 100 can be effectively corrected, the imaging quality can be ensured, and the machinability of the optical imaging lens 100 can be improved. If the proportional configuration relationship between the focal length f1 of the first lens L1 and the effective focal length f of the optical imaging lens 100 exceeds the range of the above relationship, the optical distortion in the optical imaging lens 100 will be too large, the image quality will be poor, and the The sensitivity of the molding yield of the large optical imaging lens 100 results in a large standard deviation of the optical imaging lens 100 during processing, and it is difficult to control the processing optimization direction. For the ultra-wide-angle lens, the above-mentioned defects will be more obvious. f1/f can be any value in the range of (-1.2, -0.8), for example, the value is -1.1, -1.07, -1.02, -1.00, -0, 95, -0.90, -0.88, -0.81, and so on.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: 120°≤FOV≤122°; wherein, FOV is the maximum field angle of the optical imaging lens 100 . Based on the above embodiments, satisfying the above relationship can make the optical imaging lens 100 have ultra-wide-angle characteristics, and meet the shooting requirements for a wide field of view. The FOV can be any angle within the range i of [120°, 122°], such as 120°, 120.3°, 120.8°, 121.0°, 121.2°, 121.5°, 121.9°, 122.0°, etc.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: -1<f6/f7<0; wherein, f6 is the effective focal length of the sixth lens L6, and f7 is the effective focal length of the seventh lens L7. Based on the above embodiment, since the sixth lens L6 has a positive refractive power, which is conducive to light gathering, and the seventh lens L7 has a negative refractive power, which makes the light divergent, satisfying the above relationship can reasonably control the convergence and divergence capabilities of the last two lenses of the lens , the size of the effective imaging area on the imaging surface S15 can be expanded to meet the system's requirements for large image height, and at the same time, the volume of the optical imaging lens 100 can be effectively compressed to meet the miniaturization requirements, and the image of the entire optical imaging lens 100 can be reduced. The difference and field curvature are well corrected. f6/f7 can be any value in the range of (-1, 0), for example, the values are -0.99, -0.87, -0.74, -0.63, -0.50, -0.42, -0.33, -0.21, -0.16, and so on.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: 2mm<SDL1/rad(FOV)<3mm; wherein, SDL1 is the maximum effective aperture of the object side of the first lens L1, and rad(FOV) is the optical imaging The radian value of the maximum field of view of the lens 100. Based on the above embodiment, since the maximum effective aperture and focal length of the first lens L1 largely determine the size of the field of view, satisfying the above relationship can ensure that a large enough range of light information enters the optical imaging lens 100 for imaging. However, if the upper limit of the relational expression is exceeded, the angle of view of the optical imaging lens 100 will be too small, which cannot meet the needs of shooting in a wide range. On the contrary, if the lower limit of the relational expression is exceeded, the imaging distortion in the optical imaging lens 100 will be severe, and the captured image will be distorted. SDL1/rad(FOV) can be any value within the range of (2mm, 3mm), such as 2.01mm, 2.12mm, 2.28mm, 2.37mm, 2.49mm, 2.50mm, 2.77mm, 2.84mm, 2.99mm, etc. .

In one embodiment, the optical imaging lens 100 satisfies the following relationship: 2<TTL/f<3.2; wherein, TTL is the distance from the object side of the first lens L1 to the imaging plane S17 of the optical imaging lens 100 on the optical axis 110 distance, f is the effective focal length of the optical imaging lens 100 . Based on the above embodiment, by reasonably controlling the effective focal length and total length of the optical imaging lens 100, not only the miniaturization of the optical imaging lens 100 can be realized, but also the light can be better converged on the imaging surface S17. However, if the upper limit of the relational expression is exceeded, the total length of the optical imaging lens 100 is too long, the angle of the chief ray when the light enters the imaging surface S17 is too large, and the edge light of the imaging surface S17 cannot be imaged normally, resulting in incomplete imaging information. On the contrary, if the lower limit of the relational expression is exceeded, the total length of the optical imaging lens 100 is too short, and the imaging sensitivity increases, which is not conducive to the convergence of light on the imaging surface S17. TTL/f can be any value in the range of (2, 3.2), for example, the value is 2.01, 2.24, 2.57, 2.66, 2.89, 2.95, 3.00, 3.14, 3.19, and so on.

In one embodiment, the optical imaging lens 100 satisfies the following relationship: 2<Imgh/f<4; where Imgh is the image height corresponding to the maximum field angle of the optical imaging lens 100 , and f is the effective image height of the optical imaging lens 100 focal length. Based on the above-mentioned embodiments, satisfying the above-mentioned relational expressions can enable the optical imaging lens 100 to have a larger depth of field, and at the same time, the imaging clarity can meet the requirements. If the upper limit of the relational expression is exceeded, the sharpness of the distant scene will be insufficient, which will affect the imaging effect. On the other hand, if the lower limit of the relational expression is exceeded, the field of view of the optical imaging lens 100 is too small to capture a wide range of scenes. Imgh/f can be any value in the range of (2, 4), for example, the value is 2.01, 2.53, 2.74, 2.96, 3.00, 3.27, 3.64, 3.83, 3.99, etc.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: FBL/TTL>0.15; wherein, FBL is the direction parallel to the optical axis 110 from the image side surface of the seventh lens L7 to the imaging surface S17 of the optical imaging lens 100 TTL is the distance from the object side of the first lens L1 to the imaging surface S17 of the optical imaging lens 100 on the optical axis 110 . Based on the above-mentioned embodiment, satisfying the above-mentioned relationship can make the optical imaging lens 100 satisfy the miniaturized structure and have a sufficient focusing range, improve the assembly yield of the optical imaging lens 100, and at the same time ensure that the focal depth of the optical imaging lens 100 is large, More depth information on the object side can be obtained. If the lower limit of the relational expression is exceeded, the tolerance in the assembly process of the optical imaging lens 100 is too small, resulting in a low yield rate and increasing production difficulty, and the focal depth of the optical imaging lens 100 cannot be guaranteed, resulting in poor imaging quality. FBL/TTL can be any value greater than 0.15, such as 0.151, 0.162, 0.173, 0.186, 0.195, 0.200, 0.263, 0.314, and so on.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: -2<f3/R7<-1; wherein, f3 is the effective focal length of the third lens L3, and R7 is the image side of the third lens L3 on the optical axis Radius of curvature at 110. Based on the above-mentioned embodiment, satisfying the above-mentioned relational expression is beneficial to shorten the overall length of the optical imaging lens 100 and meet the requirements of miniaturized design. f3/R7 can be any value in the range of (-2, -1), such as -1.99, -1.84, -1.72, -1.66, -1.50, -1.47, -1.33, -1.29, -1.10, - 1.01 etc.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: 1.5mm≤SDL1/FNO<3mm; wherein, SDL1 is the maximum effective aperture of the object side of the first lens L1, and FNO is the aperture number of the optical imaging lens 100 . Based on the above embodiments, by properly configuring the maximum effective aperture of the object side of the first lens L1 and the aperture number of the optical imaging lens 100 , the optical imaging lens 100 can be guaranteed to have the best light throughput and picture clarity. However, if the upper limit of the relational expression is exceeded, the field of view of the optical imaging lens 100 will be too small, and a large-scale scene cannot be captured. If the lower limit of the relational expression is exceeded, the amount of light passing through the optical imaging lens 100 will be reduced, resulting in a dark image. SDL1/FNO can be any value within the range of [2mm, 3mm), such as 2.00mm, 2.14mm, 2.22mm, 2.47mm, 2.62mm, 2.71mm, 2.86mm, 2.99mm, etc.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: 1mm ⁻¹ <(R3+R4)/(R3*R4)<1.5mm ⁻¹ ; wherein R3 is the object side of the second lens L2 facing the light The curvature radius at the axis 110, R4 is the curvature radius of the image side surface of the second lens L2 at the optical axis 110. Based on the above embodiment, satisfying the above relationship can reasonably balance the optical path difference between the edge light and the paraxial light of the optical imaging lens 100 , correct the field curvature and astigmatism in the optical imaging lens 100 , and reduce the sensitivity of the optical imaging lens 100 at the same time. properties and improve assembly stability. However, if the upper limit of the relational expression is exceeded, the sensitivity of the optical imaging lens 100 will increase, and the production yield will be reduced. If the lower limit of the relation is exceeded, the field curvature of the system will be too large. (R3+R4)/(R3*R4) can be any value within the range of (1mm ^-1 , 1.5mm ^-1 ), such as 1.01mm ^-1 , 1.10mm ^-1 , 1.18mm ^-1 , 1.20mm ^-1 , 1.25mm ^-1 , 1.30mm ^-1 , 1.36mm ^-1 , 1.42mm ^-1 , 1.49mm ^-1 , etc.

In one of the embodiments, the optical imaging lens 100 satisfies the following relationship: 1mm ⁻¹ <|R14+15|/|R14*R15|<1.5mm ⁻¹ ; wherein, R14 is the object side of the seventh lens L7 facing the light The curvature radius at the axis 110, R15 is the curvature radius of the image side surface of the seventh lens L7 at the optical axis 110. Based on the above embodiments, satisfying the above relationship can reasonably increase the incident angle of the optical imaging lens 100 to meet the image height requirement, while reducing the sensitivity of the optical imaging lens 100 and improving the stability of assembly. |R14+15|/|R14*R15| can be any value within the range of (1mm ^-1 , 1.5mm ^-1 ), such as 1.01mm ^-1 , 1.12mm ^-1 , 1.19mm ^-1 , 1.20mm ^-1 , 1.24mm ^-1 , 1.33mm ^-1 , 1.38mm ^-1 , 1.44mm ^-1 , 1.49mm ^-1 , etc.

The above parameters related to refractive index, Abbe number and focal length are all based on light with a wavelength of 587.6 nm.

The optical imaging lens 100 may further include a diaphragm STO, and the diaphragm STO is disposed between two adjacent lenses in the optical imaging lens 100 . The diaphragm STO can reduce stray light in the optical imaging lens 100 to improve imaging quality, and the diaphragm STO may be an aperture diaphragm and/or a field diaphragm. The diaphragm STO is disposed between two adjacent lenses in the optical imaging lens 100. For example, the diaphragm STO may be located between the object surface of the optical imaging lens 100 and the object side surface S1 of the first lens L1, and the Between the image side S2 and the object side S3 of the second lens L2, between the image side S4 of the second lens L2 and the object side S5 of the third lens L3, etc. To save cost, the diaphragm STO can also be set on the object side of any lens or the image side of any lens. In this embodiment, the diaphragm STO is arranged between the image side S4 of the second lens L2 and the object side S5 of the third lens L3, and the diaphragm STO is arranged in the middle of the optical imaging lens 100 to form an optical imaging lens 100 provides the possibility to have a larger field of view, effectively improving the viewing range of the picture.

The light rays emitted or reflected from the object to be photographed pass through the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 , and the sixth lens of the optical imaging lens 100 in sequence from the object side L6 and the seventh lens L7 reach the image side afterward, and form an image on the image side. In order to ensure the imaging clarity of the object to be photographed on the image side, the optical imaging lens 100 may further include an infrared filter, and the infrared filter 120 may be arranged between the image side of the seventh lens L7 and the image side of the optical imaging lens 100. between. By arranging the infrared filter 120 in the optical imaging lens 100, the light needs to pass through the infrared filter 120 after passing through the seventh lens L7, so that the infrared rays in the light can be effectively filtered, thereby ensuring the The imaging sharpness of the photographed object. Further, the optical imaging lens 100 may further include protective glass, which may be disposed on the image side of the infrared filter 120 to protect the photosensitive element, and also to prevent the photosensitive element from being contaminated with dust, thereby further ensuring imaging quality. It should be noted that, in some embodiments, in order to reduce the weight of the system or reduce the total length of the lens, it is also possible to choose not to provide a protective glass, which is not limited in this application.

The optical imaging lens 100 of the above-mentioned embodiments of the present application may employ multiple lenses, for example, the above-mentioned seven lenses. By reasonably assigning the focal length, refractive power, surface shape, thickness, and on-axis distance between the lenses, etc., the aberrations inside the optical imaging lens 100 can be eliminated, and the aberrations between the lenses can be mutually corrected, improving the The resolution power of the optical imaging lens 100 enables it to capture the details of the subject well, obtain high-quality imaging, and improve imaging clarity, so as to better meet the requirements of light-weight lenses such as in-vehicle auxiliary systems, mobile phones, and tablets. Application requirements of electronic equipment. However, those skilled in the art should understand that the number of lenses constituting the optical imaging lens 100 can be changed to obtain various results and advantages described in this specification without departing from the technical solutions claimed in the present application.

Specific examples of the optical imaging lens 100 applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

Example 1

The following describes the optical imaging lens 100 of the first embodiment of the present application with reference to FIGS. 1 to 2 .

FIG. 1 shows the structure of the optical imaging lens 100 in the first embodiment. The optical imaging lens 100 includes a first lens L1, a second lens L2, and a third lens L3 sequentially arranged along the optical axis 110 from the object side to the image side , the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the infrared filter 120, and the imaging surface S17. The diaphragm STO is disposed between the image side surface S4 of the second lens L2 and the object side surface S5 of the third lens L3.

Wherein, the first lens L1 has a negative refractive power, and its object side S1 and image side S2 are both aspherical, wherein the object side S1 is convex at the near optical axis 110, and is convex at the circumference, and the image side S2 is at the near optical axis. Concave at 110 and concave at the circumference. The second lens L2 has a positive refractive power, and the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the near optical axis 110, and is convex at the circumference, and the image side S4 is at the near optical axis 110. It is concave, and it is concave at the circumference. The third lens L3 has a positive refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is convex at the near optical axis 110, and is concave at the circumference, and the image side S6 is at the near optical axis 110. Convex, convex at the circumference. The fourth lens L4 has a negative refractive power, and the object side S7 and the image side S8 are both aspherical, wherein the object side S7 is concave at the near optical axis 110, and is concave at the circumference, and the image side S8 is at the near optical axis 110. It is concave, and it is concave at the circumference. The fifth lens L5 has a negative refractive power, and the object side S9 and the image side S10 are both aspherical surfaces, wherein the object side S9 is concave at the near optical axis 110, and is concave at the circumference, and the image side S10 is at the near optical axis 110. Convex, convex at the circumference. The sixth lens L6 has a positive refractive power, and the object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the near optical axis 110, and is concave at the circumference, and the image side S12 is at the near optical axis 110. Convex at the circumference and concave at the circumference. The seventh lens L7 has a negative refractive power, and the object side S13 and the image side S14 are both aspherical, wherein the object side S13 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S14 is at the near optical axis 110. Concave and convex at the circumference.

It should be noted that when the embodiments of the present application describe that one side surface of the lens is convex at the near optical axis, it can be understood that the area of the side surface of the lens near the optical axis is convex; when describing one side surface of the lens as When the circumference is concave, it can be understood that the area of the side near the maximum effective aperture is concave. For example, when the side surface is convex at the paraxial position and is also convex at the circumference, the shape of the side surface from the center (at the optical axis) to the edge direction can be purely convex; or a convex surface from the center first The shape transitions to a concave shape and then becomes convex near the maximum effective aperture. The descriptions of the above-mentioned surface shapes are only distances, and the specific surface shape changes are given by each specific embodiment.

In this embodiment, the refractive index, Abbe number, and focal length are based on light with a wavelength of 587.6 nm. The lens surface type, curvature radius, thickness, material, refractive index, and Abbe number (ie, dispersion coefficient) of the optical imaging lens 100 and focal length and other related parameters are shown in Table 1. Among them, f represents the effective focal length of the optical imaging lens 100, FNO represents the aperture value, FOV represents the maximum field angle of the optical imaging lens 100, and TTL represents the optical axis from the object side of the first lens L1 to the imaging surface S17 of the optical imaging lens 100. 100 on the distance. It should be noted that the units of curvature radius, thickness, and effective focal length of the lens are all millimeters (mm). In addition, taking the first lens L1 as an example, the first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis 110, and the second value is the image side to the image side of the lens The distance from the object side of the lens to the optical axis 110 in the direction of ) The distance on the optical axis 110, the default direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis 110, when the value is negative, it indicates that the aperture ST0 is arranged on the object of the lens On the right side of the apex of the side surface, if the thickness of the stop STO is a positive value, the stop STO is on the left side of the apex of the object side surface of the lens.

Table 1

The aspheric surface type in a lens is defined by the following formula:

Among them, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis 110 direction; c is the paraxial curvature of the aspheric surface, c=1/R (that is, the paraxial curvature c is Table 1 The reciprocal of the radius of curvature R); k is the conic coefficient; Ai is the i-th order coefficient of the aspheric surface. Table 2 shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20.

Table 2

The image height Imgh corresponding to the maximum field angle of the optical imaging lens 100 is 7.00mm, and the distance TTL from the object side S1 of the first lens L1 to the diaphragm STO on the optical axis 100 is 6.50mm. It can be seen from the data that the optical imaging lens 100 in the first embodiment satisfies:

tan(FOV)/TTL=-0.2462mm ^-1 ; tan(FOV) is the tangent of the maximum angle of view of the optical imaging lens 100, and TTL is the object side of the first lens L1 to the imaging surface S17 of the optical imaging lens 100 at Distance on optical axis 110. Satisfying the above relationship can make the structure of the optical imaging lens 100 miniaturized and have a larger angle of view, which is also beneficial to the correction of aberrations.

VdL1=56.11, VdL2=21.53, VdL1/VdL2=2.61; wherein, VdL1 is the Abbe number of the first lens L1, and VdL2 is the Abbe number of the second lens L2. Satisfying the above relationship, the first lens L1 and the second lens L2 can be designed with high-dispersion materials and low-dispersion materials respectively, which is beneficial to the mutual compensation of the dispersion of the first lens L1 and the second lens L2, and the two produce opposite effects. The axial chromatic aberration can cancel each other to achieve the purpose of eliminating chromatic aberration.

f1/f=−1.07; wherein, f1 is the effective focal length of the first lens L1 , and f is the effective focal length of the optical imaging lens 100 . When the above relationship is satisfied, the optical distortion in the optical imaging lens 100 can be effectively corrected, the imaging quality is ensured, and the machinability of the optical imaging lens 100 is improved.

FOV=122°; wherein, FOV is the maximum field angle of the optical imaging lens 100 . Satisfying the above relationship can make the optical imaging lens 100 have ultra-wide-angle characteristics and meet the shooting requirements for a wide field of view.

f6/f7=-0.74; wherein, f6 is the effective focal length of the sixth lens L6, and f7 is the effective focal length of the seventh lens L7. Satisfying the above relationship can reasonably control the convergence and divergence capabilities of the last two lenses of the lens, and can expand the size of the effective imaging area on the imaging surface to meet the system’s requirements for large image height, and can also effectively compress the optical imaging lens 100. The volume of the optical imaging lens 100 can meet the requirements of miniaturization, and the aberration and field curvature of the entire optical imaging lens 100 can be well corrected.

SDL1/rad(FOV)=2.37mm; wherein, SDL1 is the maximum effective aperture of the object side surface S1 of the first lens L1 , and rad(FOV) is the radian value of the maximum field angle of the optical imaging lens 100 . Satisfying the above relationship can ensure that a sufficiently large range of light information enters the optical imaging lens 100 for imaging.

TTL/f=2.95; wherein, TTL is the distance from the object side S1 of the first lens L1 to the imaging surface S17 of the optical imaging lens 100 on the optical axis 110 , and f is the effective focal length of the optical imaging lens 100 . Satisfying the above relationship can not only realize the miniaturization of the optical imaging lens 100 , but also ensure that the light is better converged on the imaging surface S17 .

Imgh/f=3.18; where Imgh is the image height corresponding to the maximum angle of view of the optical imaging lens 100 , and f is the effective focal length of the optical imaging lens 100 . Satisfying the above relationship can make the optical imaging lens 100 have a larger depth of field, and at the same time, the imaging clarity can meet the requirements.

FBL/TTL=0.154; wherein, FBL is the shortest distance from the image side S14 of the seventh lens L7 to the imaging surface S17 of the optical imaging lens 100 in a direction parallel to the optical axis 110, and TTL is the object side S1 of the first lens L1 to The distance between the imaging surface S17 of the optical imaging lens 100 and the optical axis 110 . Satisfying the above relationship can make the optical imaging lens 100 satisfy the miniaturization of the structure and have a sufficient focusing range, improve the assembly yield of the optical imaging lens 100, and at the same time ensure that the focal depth of the optical imaging lens 100 is large, and can obtain more object-side images. lots of in-depth information.

f3/R7=-1.32; wherein, f3 is the effective focal length of the third lens L3, and R7 is the radius of curvature of the image side surface S6 of the third lens L3 on the optical axis 110. Satisfying the above relationship is beneficial to shorten the overall length of the optical imaging lens 100 and meet the requirements of miniaturized design.

SDL1/FNO=2.38mm; wherein, SDL1 is the maximum effective aperture of the object side surface S1 of the first lens L1 , and FNO is the aperture number of the optical imaging lens 100 . Satisfying the above relationship can ensure that the optical imaging lens 100 has the best light transmission amount and picture clarity.

(R3+R4)/(R3*R4)=1.25mm ⁻¹ ; wherein, R3 is the radius of curvature of the object side S3 of the second lens L2 at the optical axis 110, and R4 is the image side S4 of the second lens L2 in the light Radius of curvature at axis 110 . Satisfying the above relationship can reasonably balance the optical path difference between the edge light and the paraxial light of the optical imaging lens 100 , correct the field curvature and astigmatism in the optical imaging lens 100 , reduce the sensitivity of the optical imaging lens 100 , and improve the assembly stability. sex.

|R14+15|/|R14*R15|=1.27mm ⁻¹ ; wherein, R14 is the radius of curvature of the object side S13 of the seventh lens L7 at the optical axis 110, and R15 is the image side S14 of the seventh lens L7 at the optical axis Radius of curvature at axis 110 . Satisfying the above relationship can reasonably increase the incident angle of the optical imaging lens 100 to meet the image height requirement, and at the same time reduce the sensitivity of the optical imaging lens 100 and improve the stability of assembly.

FIG. 2 respectively shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens 100 according to the first embodiment, and the reference wavelength of the optical imaging lens 100 is 587.60 nm. Among them, the longitudinal spherical aberration graph shows the focus point deviation of light with wavelengths of 650.00nm, 610.00nm, 587.60nm, 510.00nm and 470.00nm after passing through the optical imaging lens 100, and its abscissa is the focus deviation, in mm , the ordinate is the normalized field of view; the astigmatism graph shows the curvature of the meridional image plane and the curvature of the sagittal image plane of the optical imaging lens 100, the abscissa is the focus shift, the unit is mm, and the ordinate is the image height , the unit is mm, S is the field curvature of the sagittal image surface, T is the field curvature of the meridional image surface; the distortion curve diagram shows the distortion of the optical imaging lens 100 under different image heights, the abscissa is the distortion rate, and the ordinate is is the image height, in mm. It can be seen from FIG. 2 that the optical imaging lens 100 provided in the first embodiment can achieve good imaging quality.

Embodiment 2

The following describes the optical imaging lens 100 of the second embodiment of the present application with reference to FIGS. 3 to 4 .

FIG. 3 shows the structure of the optical imaging lens 100 in the second embodiment. The optical imaging lens 100 includes a first lens L1 , a second lens L2 , and a third lens L3 sequentially arranged along the optical axis 110 from the object side to the image side , the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the infrared filter 120, and the imaging surface S17. The diaphragm STO is disposed between the image side surface S4 of the second lens L2 and the object side surface S5 of the third lens L3.

The first lens L1 has a negative refractive power, the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is concave at the near optical axis 110 and convex at the circumference, and the image side S2 is at the near optical axis. Concave at 110 and concave at the circumference. The second lens L2 has a positive refractive power, and the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the near optical axis 110, and is convex at the circumference, and the image side S4 is at the near optical axis 110. It is concave, and it is concave at the circumference. The third lens L3 has a positive refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is convex at the near optical axis 110, and is concave at the circumference, and the image side S6 is at the near optical axis 110. Convex, convex at the circumference. The fourth lens L4 has a negative refractive power, and the object side S7 and the image side S8 are both aspherical, wherein the object side S7 is concave at the near optical axis 110, and is concave at the circumference, and the image side S8 is at the near optical axis 110. Concave and convex at the circumference. The fifth lens L5 has a positive refractive power, and the object side S9 and the image side S10 are both aspherical, wherein the object side S9 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S10 is at the near optical axis 110. Concave and convex at the circumference. The sixth lens L6 has a positive refractive power, and the object side S11 and the image side S12 are both aspherical, wherein the object side S11 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S12 is at the near optical axis 110. Convex, convex at the circumference. The seventh lens L7 has a negative refractive power, and the object side S13 and the image side S14 are both aspherical, wherein the object side S13 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S14 is at the near optical axis 110. Concave and convex at the circumference.

In this embodiment, the parameters of each lens in the optical imaging lens 100 are given in Table 3 and Table 4, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.

table 3

Table 4

Combining with the data in Table 3 and Table 4, it can be known that the optical imaging lens 100 in the second embodiment satisfies:

table 5

It can be seen from FIG. 4 that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 given in the second embodiment are well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

Embodiment 3

The following describes the optical imaging lens 100 of the third embodiment of the present application with reference to FIGS. 5 to 6 .

FIG. 5 shows the structure of the optical imaging lens 100 in the third embodiment. The optical imaging lens 100 includes a first lens L1 , a second lens L2 , and a third lens L3 sequentially arranged along the optical axis 110 from the object side to the image side , the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the infrared filter 120, and the imaging surface S17. The diaphragm STO is disposed between the image side surface S4 of the second lens L2 and the object side surface S5 of the third lens L3.

The first lens L1 has a negative refractive power, the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is concave at the near-optical axis 110 and convex at the circumference, and the image side S2 is at the near-optical axis. Concave at 110 and convex at the circumference. The second lens L2 has a positive refractive power, and the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the near optical axis 110, and is concave at the circumference, and the image side S4 is at the near optical axis 110. It is concave, and it is concave at the circumference. The third lens L3 has a positive refractive power, and the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is convex at the near optical axis 110, and concave at the circumference, and the image side S6 is at the near optical axis 110. Convex, convex at the circumference. The fourth lens L4 has a positive refractive power, and the object side S7 and the image side S8 are both aspherical surfaces, wherein the object side S7 is concave at the near optical axis 110, and is concave at the circumference, and the image side S8 is at the near optical axis 110. Convex, convex at the circumference. The fifth lens L5 has a negative refractive power, and the object side S9 and the image side S10 are both aspherical surfaces, wherein the object side S9 is concave at the near optical axis 110, and is concave at the circumference, and the image side S10 is at the near optical axis 110. Concave and convex at the circumference. The sixth lens L6 has a positive refractive power, and its object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the near optical axis 110, and is concave at the circumference, and the image side S12 is at the near optical axis 110. Convex at the circumference and concave at the circumference. The seventh lens L7 has a negative refractive power, and the object side S13 and the image side S14 are both aspherical surfaces, wherein the object side S13 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S14 is at the near optical axis 110. Concave and convex at the circumference.

In this embodiment, the parameters of each lens in the optical imaging lens 100 are given in Table 6 and Table 7, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.

Table 6

Table 7

Combining with the data in Table 6 and Table 7, it can be known that the optical imaging lens 100 in the third embodiment satisfies:

Table 8

It can be seen from FIG. 6 that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 of the third embodiment are well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

Embodiment 4

The optical imaging lens 100 according to the fourth embodiment of the present application will be described below with reference to FIGS. 7 to 8 .

FIG. 7 shows the structure of the optical imaging lens 100 in the fourth embodiment. The optical imaging lens 100 includes a first lens L1 , a second lens L2 , and a third lens L3 sequentially arranged along the optical axis 110 from the object side to the image side , the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the infrared filter 120, and the imaging surface S17. The diaphragm STO is disposed between the image side surface S4 of the second lens L2 and the object side surface S5 of the third lens L3.

Wherein, the first lens L1 has a negative refractive power, and its object side S1 and image side S2 are both aspherical, wherein the object side S1 is convex at the near optical axis 110, and is convex at the circumference, and the image side S2 is at the near optical axis. Concave at 110 and concave at the circumference. The second lens L2 has a positive refractive power, and the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the near optical axis 110, and is convex at the circumference, and the image side S4 is at the near optical axis 110. It is concave, and it is concave at the circumference. The third lens L3 has a positive refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is convex at the near optical axis 110, and is concave at the circumference, and the image side S6 is at the near optical axis 110. Convex, convex at the circumference. The fourth lens L4 has a negative refractive power, and the object side S7 and the image side S8 are both aspherical, wherein the object side S7 is concave at the near optical axis 110, and is concave at the circumference, and the image side S8 is at the near optical axis 110. Concave and convex at the circumference. The fifth lens L5 has a negative refractive power, and the object side S9 and the image side S10 are both aspherical surfaces, wherein the object side S9 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S10 is at the near optical axis 110. Concave and convex at the circumference. The sixth lens L6 has a positive refractive power, and the object side S11 and the image side S12 are both aspherical, wherein the object side S11 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S12 is at the near optical axis 110. Convex, convex at the circumference. The seventh lens L7 has a negative refractive power, and the object side S13 and the image side S14 are both aspherical, wherein the object side S13 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S14 is at the near optical axis 110. Concave and convex at the circumference.

In this embodiment, the parameters of each lens in the optical imaging lens 100 are given in Table 9 and Table 10, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.

Table 9

Table 10

Combining with the data in Table 9 and Table 10, it can be known that the optical imaging lens 100 in the fourth embodiment satisfies:

Table 11

It can be seen from FIG. 8 that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 of the fourth embodiment are well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

Embodiment 5

The optical imaging lens 100 of Embodiment 5 of the present application will be described below with reference to FIGS. 9 to 10 .

9 shows the structure of the optical imaging lens 100 in the fifth embodiment. The optical imaging lens 100 includes a first lens L1 , a second lens L2 , and a third lens L3 arranged in sequence from the object side to the image side along the optical axis 110 , the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the infrared filter 120, and the imaging surface S17. The diaphragm STO is disposed between the image side surface S4 of the second lens L2 and the object side surface S5 of the third lens L3.

The first lens L1 has a negative refractive power, the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is concave at the near optical axis 110 and convex at the circumference, and the image side S2 is at the near optical axis. Concave at 110 and concave at the circumference. The second lens L2 has a positive refractive power, and the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the near optical axis 110, and is convex at the circumference, and the image side S4 is at the near optical axis 110. It is concave, and it is concave at the circumference. The third lens L3 has a positive refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is convex at the near optical axis 110, and is concave at the circumference, and the image side S6 is at the near optical axis 110. Convex, convex at the circumference. The fourth lens L4 has a negative refractive power, and the object side S7 and the image side S8 are both aspherical, wherein the object side S7 is concave at the near optical axis 110, and is concave at the circumference, and the image side S8 is at the near optical axis 110. Concave and convex at the circumference. The fifth lens L5 has a negative refractive power, and the object side S9 and the image side S10 are both aspherical surfaces, wherein the object side S9 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S10 is at the near optical axis 110. Concave and convex at the circumference. The sixth lens L6 has a positive refractive power, and the object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the near optical axis 110, and is concave at the circumference, and the image side S12 is at the near optical axis 110. Convex at the circumference and concave at the circumference. The seventh lens L7 has a negative refractive power, and its object side S13 and image side S14 are both aspherical, wherein the object side S13 is a convex surface at the near optical axis 110, and is convex at the circumference, and the image side S14 is at the near optical axis 110. Concave and convex at the circumference.

In this embodiment, the lens parameters in the optical imaging lens 100 are given in Table 12 and Table 13, wherein the definitions of the structures and parameters can be obtained from the first embodiment, and are not repeated here.

Table 12

Table 13

Combining the data in Table 12 and Table 13, it can be known that the optical imaging lens 100 in the fifth embodiment satisfies:

Table 14

It can be seen from FIG. 10 that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 of the fifth embodiment are well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

Embodiment 6

The optical imaging lens 100 according to the sixth embodiment of the present application will be described below with reference to FIGS. 11 to 12 .

FIG. 11 shows the structure of the optical imaging lens 100 in the sixth embodiment. The optical imaging lens 100 includes a first lens L1 , a second lens L2 , and a third lens L3 sequentially arranged along the optical axis 110 from the object side to the image side , the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the infrared filter 120, and the imaging surface S17. The diaphragm STO is disposed between the image side surface S4 of the second lens L2 and the object side surface S5 of the third lens L3.

The first lens L1 has a negative refractive power, the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is concave at the near optical axis 110 and convex at the circumference, and the image side S2 is at the near optical axis. Concave at 110 and concave at the circumference. The second lens L2 has a positive refractive power, and the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the near optical axis 110, and is convex at the circumference, and the image side S4 is at the near optical axis 110. It is concave, and it is concave at the circumference. The third lens L3 has a positive refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is convex at the near optical axis 110, and is concave at the circumference, and the image side S6 is at the near optical axis 110. Convex, convex at the circumference. The fourth lens L4 has a negative refractive power, and the object side S7 and the image side S8 are both aspherical, wherein the object side S7 is concave at the near optical axis 110, and is concave at the circumference, and the image side S8 is at the near optical axis 110. Concave and convex at the circumference. The fifth lens L5 has a negative refractive power, and the object side S9 and the image side S10 are both aspherical surfaces, wherein the object side S9 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S10 is at the near optical axis 110. It is concave, and it is concave at the circumference. The sixth lens L6 has a positive refractive power, and the object side S11 and the image side S12 are both aspherical, wherein the object side S11 is a convex surface at the near optical axis 110, and is concave at the circumference, and the image side S12 is at the near optical axis 110. Convex, convex at the circumference. The seventh lens L7 has a negative refractive power, and its object side S13 and image side S14 are both aspherical, wherein the object side S13 is a convex surface at the near optical axis 110, and is convex at the circumference, and the image side S14 is at the near optical axis 110. It is concave, and it is concave at the circumference.

In this embodiment, the parameters of each lens in the optical imaging lens 100 are given in Table 15 and Table 16, wherein the definitions of the structures and parameters can be obtained from the first embodiment, which will not be repeated here.

Table 15

Table 16

Combining with the data in Table 15 and Table 16, it can be known that the optical imaging lens 100 in the sixth embodiment satisfies:

Table 17

It can be seen from FIG. 12 that the longitudinal spherical aberration, field curvature and distortion in the optical imaging lens 100 given in the sixth embodiment are well controlled, so that the optical imaging lens 100 of this embodiment can achieve good imaging quality.

As shown in FIG. 13 , an embodiment of the present application further provides an imaging device 200 , which includes the optical imaging lens 100 and a photosensitive element 210 as described above. The photosensitive surface of S17 coincides with the imaging surface S17. Specifically, the photosensitive element 210 may use a complementary metal oxide semiconductor (CMOS, Complementary Metal Oxide Semiconductor) image sensor or a charge coupled device (CCD, Charge-coupled Device) image sensor.

The imaging device 200 in the embodiment of the present application adopts the above-mentioned optical imaging lens 100, and by reasonably configuring the refractive power, surface shape, and arrangement and combination order of the first lens L1 to the seventh lens L7, it is beneficial to eliminate the optical imaging lens. 100 internal aberrations, realize the mutual correction of the aberrations between the lenses, and improve the resolution of the optical imaging lens 100, so that it can well capture the details of the subject, obtain high-quality imaging, and improve imaging clarity.

As shown in FIG. 14 , the present application further provides an electronic device 300 , which includes a casing 310 and the imaging device 200 as described above, and the imaging device 200 is installed on the casing 310 . Specifically, the imaging device 200 is disposed in the casing 310 and exposed from the casing 310 to acquire images. The casing 310 can provide the imaging device 200 with protection from dust, water and drop, and the like. A hole corresponding to the device 200 is formed, so that light can pass through the hole or pass through the casing 310 . The electronic device 300 is any device that has the function of acquiring images, for example, it can be any of wearable devices such as mobile phones, tablet computers, notebook computers, personal digital assistants, smart bracelets, smart watches, etc. The imaging device 200 cooperates with the electronic device. The device 300 realizes image acquisition and reproduction of the target object.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (14)

1. An optical imaging lens, characterized in that the optical imaging lens comprises seven lenses with refractive power, and the optical imaging lens comprises in sequence from the object side to the image side along the optical axis: a first lens with negative refractive power; The second lens has a positive refractive power, the object side of the second lens is convex at the near optical axis, and the image side of the second lens is concave at the near optical axis; The third lens has a positive refractive power, the object side of the third lens is convex at the near optical axis, and the image side of the third lens is convex at the near optical axis; the fourth lens has a refractive power, and the object side of the fourth lens is concave at the near optical axis; the fifth lens, with refractive power; The sixth lens has a positive refractive power, and the image side surface of the sixth lens is convex at the near optical axis; The seventh lens has a negative refractive power, the object side of the seventh lens is convex at the near optical axis, and the image side of the seventh lens is concave at the near optical axis; The optical imaging lens satisfies the following relationship: -0.3mm ^-1 <tan(FOV)/TTL<-0.2mm ^-1 ; -1.2<f1/f<-0.8; Among them, tan(FOV) is the tangent value of the maximum field of view of the optical imaging lens, TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and f1 is the is the effective focal length of the first lens, and f is the effective focal length of the optical imaging lens. 2. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relationship: VdL1>50; VdL2<50; 2<VdL1/VdL2<3; Wherein, VdL1 is the Abbe number of the first lens, and VdL2 is the Abbe number of the second lens. 3. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relationship: 120°≤FOV≤122°; Wherein, FOV is the maximum field of view of the optical imaging lens. 4. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relationship: -1<f6/f7<0; Wherein, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens. 5. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation: 2mm<SDL1/rad(FOV)<3mm; Wherein, SDL1 is the maximum effective aperture of the object side of the first lens, and rad(FOV) is the radian value of the maximum field of view of the optical imaging lens. 6. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relationship: 2<TTL/f<3.2; Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and f is the effective focal length of the optical imaging lens. 7. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation: 2<Imgh/f<4; Wherein, Imgh is the image height corresponding to the maximum angle of view of the optical imaging lens, and f is the effective focal length of the optical imaging lens. 8. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relationship: FBL/TTL>0.15; Wherein, FBL is the shortest distance from the image side of the seventh lens to the imaging plane of the optical imaging lens in a direction parallel to the optical axis, and TTL is the imaging distance from the object side of the first lens to the optical imaging lens The distance of the face on the optical axis. 9. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation: -2<f3/R7<-1; Wherein, f3 is the effective focal length of the third lens, and R7 is the radius of curvature of the image side surface of the third lens at the optical axis. 10. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relationship: 1.5mm≤SDL1/FNO<3mm; Wherein, SDL1 is the maximum effective aperture of the object side of the first lens, and FNO is the aperture number of the optical imaging lens. 11. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relationship: 1mm ^-1 <(R3+R4)/(R3*R4)<1.5mm ^-1 ; Wherein, R3 is the radius of curvature of the object side of the second lens at the optical axis, and R4 is the radius of curvature of the image side of the second lens at the optical axis. 12. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relationship: 1mm ^-1 <|R14+R15|/|R14*R15|<1.5mm ^-1 ; Wherein, R14 is the radius of curvature of the object side of the seventh lens at the optical axis, and R15 is the radius of curvature of the image side of the seventh lens at the optical axis. 13. An imaging device, comprising: The optical imaging lens according to any one of claims 1 to 12; The photosensitive element is arranged on the image side of the optical imaging lens. 14. An electronic device, characterized in that, comprising: case; The imaging device according to claim 13, wherein the imaging device is provided on the casing.

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