CN114706201A

CN114706201A - Optical imaging lens

Info

Publication number: CN114706201A
Application number: CN202210523688.6A
Authority: CN
Inventors: 贺凌波; 张龙; 李倩; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-07-05
Anticipated expiration: 2042-05-13
Also published as: CN114706201B

Abstract

The application discloses optical imaging lens includes following preface from object side to image side along optical axis: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. Wherein, the first lens to the fourth lens at least have three convex surfaces; the fifth lens to the eighth lens have at least three concave surfaces; the third lens has negative focal power; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the object side surface of the seventh lens is a convex surface. The effective focal length f of the optical imaging lens and half of the maximum field angle Semi-FOV of the optical imaging lens meet the following conditions: f × tan (Semi-FOV) >4.8 mm.

Description

Optical imaging lens

Technical Field

The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.

Background

With the rapid development of smart phones and the self-media era, people have higher and higher requirements on the camera function of the smart phones. Various large mobile phone manufacturers are continuously developing new products, at present, the requirements for the performance and the appearance of mobile phone lenses, especially high-end mobile phone lenses, are gradually developing towards the directions of large aperture, large image plane and ultra-thin, and the design challenges of the mobile phone lenses are also higher and higher.

Compared with a common optical imaging lens, the large-aperture large-image-plane lens has the advantages that the resolution of the lens can be improved, more details can be obtained, and more mobile phone shape design spaces can be provided due to the ultrathin shape. The structure of the conventional six-piece or seven-piece lens is not enough to effectively meet the challenges, and the optical imaging lens system of eight-piece or nine-piece type will become the mainstream gradually.

However, the existing high-end mobile phone lens, such as an eight-lens, is difficult to realize that the lens has a smaller total length due to the increase of the number of lenses, so that the requirement for an ultrathin large-image-plane lens cannot be met; meanwhile, the high-end mobile phone lens has higher design requirements and higher difficulty, so that the problems of imaging quality, processing technology and the like also exist.

Disclosure of Invention

In one aspect, the present disclosure provides an optical imaging lens, which sequentially includes, from an object side to an image side along an optical axis: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein at least three convex surfaces are arranged in the first lens to the fourth lens; at least three concave surfaces are arranged in the fifth lens to the eighth lens; the third lens has a negative optical power; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the object side surface of the seventh lens is a convex surface. The effective focal length f of the optical imaging lens and half of the maximum field angle Semi-FOV of the optical imaging lens can satisfy the following conditions: f × tan (Semi-FOV) >4.8 mm.

In one embodiment, a distance TTL from an object side surface of the first lens element to an imaging surface of the optical imaging lens along the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface may satisfy: TTL/ImgH < 1.2.

In one embodiment, a combined focal length f12345 of the first to fifth lenses and a combined focal length f678 of the sixth to eighth lenses may satisfy: -1.0< f12345/f678< 0.

In one embodiment, a combined focal length f123 of the first lens to the third lens and a distance T13 on the optical axis from an object side surface of the first lens to an image side surface of the third lens may satisfy: 3.0< f123/T13< 5.0.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, the effective focal length f1 of the first lens, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, and the effective focal length f2 of the second lens may satisfy: 0.2< [ (R1+ R2)/f1]/| (R3+ R4)/f2| < 2.0.

In one embodiment, the radius of curvature R6 of the image-side surface of the third lens and the effective focal length f3 of the third lens may satisfy: -1.0< R6/f3< 0.

In one embodiment, an effective focal length f4 of the fourth lens, a radius of curvature R7 of an object-side surface of the fourth lens, a radius of curvature R8 of an image-side surface of the fourth lens, an effective focal length f5 of the fifth lens, a radius of curvature R9 of an object-side surface of the fifth lens, and a radius of curvature R10 of an image-side surface of the fifth lens may satisfy: -3.0< f4/(R7+ R8) + f5/(R9+ R10) < -1.0.

In one embodiment, a separation distance T56 of the fifth lens and the sixth lens on the optical axis, a separation distance T67 of the sixth lens and the seventh lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and an edge thickness ET6 of the sixth lens may satisfy: 1.5< T56/T67+ CT6/ET6< 2.5.

In one embodiment, a sum Σ CTA of central thicknesses on the optical axis of lenses having one convex surface among the first to fourth lenses and a sum Σ CTB of central thicknesses on the optical axis of lenses having one convex surface among the fifth to eighth lenses may satisfy: 0.3< Σ CTA/Σ CTB < 2.0.

In one embodiment, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens may satisfy: (N3+ N4+ N5)/3> 1.5.

In one embodiment, the abbe number V4 of the fourth lens, the abbe number V3 of the third lens and the abbe number V5 of the fifth lens may satisfy: 10.0< V4- (V3+ V5) < 20.0.

In one embodiment, the first lens has a positive optical power, with a convex object-side surface and a concave image-side surface; the second lens has positive focal power, and the object side surface of the second lens is a convex surface; the image side surface of the third lens is a concave surface; and the fourth lens has a positive optical power.

In one embodiment, the fifth lens element has a negative power, and has a convex object-side surface and a concave image-side surface; the seventh lens has positive optical power; and the eighth lens has negative focal power, and the object side surface of the eighth lens is a concave surface.

In another aspect, the present disclosure provides an optical imaging lens, which sequentially includes, from an object side to an image side along an optical axis: the zoom lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. Wherein at least three convex surfaces are provided in the first to fourth lenses; at least three concave surfaces are arranged in the fifth lens to the eighth lens; the third lens has a negative power; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the object side surface of the seventh lens is a convex surface. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface can satisfy the following conditions: TTL/ImgH < 1.2.

In one embodiment, the effective focal length f of the optical imaging lens and half of the maximum field angle Semi-FOV of the optical imaging lens may satisfy: f × tan (Semi-FOV) >4.8 mm.

In one embodiment, the effective focal length f4 of the fourth lens, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, the effective focal length f5 of the fifth lens, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens may satisfy: -3.0< f4/(R7+ R8) + f5/(R9+ R10) < -1.0.

The eight-piece type lens framework is adopted, and the focal power and the surface type of each lens are reasonably matched, so that the lenses have good machinability, and the ultra-thinning characteristic of the optical imaging lens can be realized. The power of the third lens is negative, so that the light trend is smooth, the aberration generated by the first lens and the second lens is balanced, and the performance of the optical lens group is improved; the fourth lens is arranged such that the object side surface is a concave surface and the image side surface is a convex surface, which contributes to balancing aberration and improving imaging quality; by setting the focal power of the sixth lens as positive, the object side surface as concave and the image side surface as convex, the total length of the lens can be shortened while good processability is ensured; meanwhile, the object side surface of the seventh lens is a convex surface, so that a small incident angle can be ensured when the principal ray of the imaging system is incident on the image surface. In addition, in the exemplary embodiment of the application, by reasonably controlling the effective focal length of the optical imaging lens and the maximum field angle of the optical imaging lens, the effect of a large image plane can be achieved, so that the system has higher optical resolution and better processing technology.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;

fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;

fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;

fig. 4A to 4D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, respectively;

fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;

fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;

fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;

fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;

fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;

fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;

fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;

fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6;

fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application; and

fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 7.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. In this document, the surface of each lens closest to the subject is referred to as the object-side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image-side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to examples or illustrations.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The following provides a detailed description of the features, principles, and other aspects of the present application.

An optical imaging lens according to an exemplary embodiment of the present application may include, for example, eight lenses, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in order from an object side to an image side along an optical axis.

In an exemplary embodiment, the first to fourth lenses may have at least three convex surfaces, i.e., the first, second, third, and fourth lenses may have at least three convex surfaces.

In an exemplary embodiment, at least three concave surfaces may be provided in the fifth to eighth lenses, that is, at least three concave surfaces may be provided in the fifth, sixth, seventh and eighth lenses.

In an exemplary embodiment, the third lens may have a negative power; the sixth lens may have a positive optical power.

In an exemplary embodiment, the object-side surface of the fourth lens element may be concave and the image-side surface may be convex; the object side surface of the sixth lens element can be a concave surface, and the image side surface can be a convex surface; the object side surface of the seventh lens element may be convex.

The optical power and the surface type of each lens are reasonably matched, so that the characteristics of good machinability and ultra-thinning can be ensured. The focal power of the third lens is negative, so that the light ray trend is smooth, the aberration generated by the first lens and the second lens can be balanced, and the performance of the optical lens group is improved. The object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface, so that aberration is balanced, and imaging quality is improved. The sixth lens has positive focal power, a concave object side surface and a convex image side surface, and the surface types are reasonably matched, so that the total length of the lens is shortened while good processability is ensured. The object side surface of the seventh lens is a convex surface, which is beneficial to ensuring that the chief ray of the imaging system has a smaller incident angle when being incident on the image plane.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression f × tan (Semi-FOV) >4.8mm, where f is an effective focal length of the optical imaging lens, and the Semi-FOV is half of a maximum field angle of the optical imaging lens. By controlling the effective focal length of the optical imaging lens and the maximum field angle of the optical imaging lens to satisfy f multiplied by tan (Semi-FOV) >4.8mm, the effect of a large image plane can be realized, and further, the optical imaging lens has higher optical resolution and better processing technology. More specifically, f and FOV may satisfy: f × tan (Semi-FOV) >4.9 mm. Illustratively, f may satisfy 4.73mm < f < 4.91mm, and Semi-FOV may satisfy 45.0 ° < Semi-FOV < 46.5 °.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression TTL/ImgH <1.2, where TTL is a distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is a half of a diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. By controlling the ratio of the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis to half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens within the range, the optical imaging system can be ultrathin and large image plane high pixels can be realized at the same time. Illustratively, TTL can satisfy 5.6mm < TTL < 5.8mm, and ImgH can satisfy 5.0mm < ImgH < 5.2 mm.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.0 < f12345/f678<0, where f12345 is the combined focal length of the first lens to the fifth lens, and f678 is the combined focal length of the sixth lens to the eighth lens. By controlling the ratio of the combined focal length of the first lens to the fifth lens to the combined focal length of the sixth lens to the eighth lens within the range, the five lenses of the first lens to the fifth lens can be combined to be used as a lens group with reasonable positive focal power to balance the aberration generated by the lens group with negative focal power after the sixth lens, the seventh lens and the eighth lens are combined, and the image resolving power is improved. More specifically, f12345 and f678 may satisfy: -0.8< f12345/f678< -0.2.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 3.0< f123/T13<5.0, where f123 is a combined focal length of the first lens to the third lens, and T13 is a distance on an optical axis from an object-side surface of the first lens to an image-side surface of the third lens. By controlling the ratio of the combined focal length of the first lens to the third lens to the distance between the object side surface of the first lens and the image side surface of the third lens on the optical axis within the range, the light converging capability of the optical lens group is improved, the light focusing position is adjusted, the total length of the optical lens is shortened, and the ultra-thinning characteristic is realized. More specifically, f123 and T13 may satisfy: 3.7< f123/T13< 4.9.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.2< [ (R1+ R2)/f1]/| (R3+ R4)/f2| <2.0, where R1 is a radius of curvature of an object-side surface of the first lens, R2 is a radius of curvature of an image-side surface of the first lens, f1 is an effective focal length of the first lens, R3 is a radius of curvature of an object-side surface of the second lens, R4 is a radius of curvature of an image-side surface of the second lens, and f2 is an effective focal length of the second lens. By controlling the curvature radius of the object side surface of the first lens, the curvature radius of the image side surface of the first lens, the effective focal length of the first lens, the curvature radius of the object side surface of the second lens, the curvature radius of the image side surface of the second lens and the effective focal length of the second lens to meet 0.2< [ (R1+ R2)/f1]/| (R3+ R4)/f2| <2.0, the optical distortion of the system is reduced, and better imaging quality is ensured. More specifically, R1, R2, f1, R3, R4, and f2 may satisfy: 0.3< [ (R1+ R2)/f1]/| (R3+ R4)/f2| < 1.8.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.0 < R6/f3<0, where R6 is a radius of curvature of an image-side surface of the third lens, and f3 is an effective focal length of the third lens. By controlling the ratio of the curvature radius of the image side surface of the third lens to the effective focal length of the third lens in the range, the axial aberration of the optical system can be effectively controlled, and the processing difficulty of the third lens is controlled. More specifically, R6 and f3 may satisfy: -0.9< R6/f3< -0.2.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-3.0 < f4/(R7+ R8) + f5/(R9+ R10) < -1.0, where f4 is an effective focal length of the fourth lens, R7 is a radius of curvature of an object-side surface of the fourth lens, R8 is a radius of curvature of an image-side surface of the fourth lens, f5 is an effective focal length of the fifth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and R10 is a radius of curvature of an image-side surface of the fifth lens. By controlling the effective focal length of the fourth lens, the curvature radius of the object side surface of the fourth lens, the curvature radius of the image side surface of the fourth lens, the effective focal length of the fifth lens, the curvature radius of the object side surface of the fifth lens and the curvature radius of the image side surface of the fifth lens meet the requirements that-3.0 < f4/(R7+ R8) + f5/(R9+ R10) < -1.0, the incident angle of rays of an off-axis field of view on an imaging surface can be controlled, and the matching performance between the rays of the off-axis field of view rays and a photosensitive element and a band-pass filter can be improved. More specifically, f4, R7, R8, f5, R9, and R10 may satisfy: -2.5< f4/(R7+ R8) + f5/(R9+ R10) < -1.2.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5< T56/T67+ CT6/ET6<2.5, where T56 is a separation distance of the fifth lens and the sixth lens on the optical axis, T67 is a separation distance of the sixth lens and the seventh lens on the optical axis, CT6 is a center thickness of the sixth lens on the optical axis, and ET6 is an edge thickness of the sixth lens. By controlling the ratio of the spacing distance of the fifth lens and the sixth lens on the optical axis to the spacing distance of the sixth lens and the seventh lens on the optical axis and the sum of the ratio of the center thickness of the sixth lens on the optical axis to the edge thickness of the sixth lens within the range, the air interval and the thickness ratio are reasonably distributed, the assembly difficulty of the lens is reduced, the problems of interference of the front lens and the rear lens in the assembly process caused by too small gaps are avoided, and the processing performance is improved. More specifically, T56, T67, CT6, and ET6 may satisfy: 1.7< T56/T67+ CT6/ET6< 2.4.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3< Σ CTA/Σ CTB <2.0, where Σ is a sum of central thicknesses on the optical axis of the lenses having one convex surface among the first to fourth lenses, and Σ CTB is a sum of central thicknesses on the optical axis of the lenses having one convex surface among the fifth to eighth lenses. By controlling the ratio of the sum of the central thicknesses of the lenses with one convex surface in the first lens to the fourth lens and the sum of the central thicknesses of the lenses with one convex surface in the fifth lens to the eighth lens in the optical axis within the range, the middle thickness of the lenses is reasonably controlled, so that the lenses are easy to perform injection molding, the processability of an imaging system is ensured, the optical sensitivity is reduced, and the yield is improved. More specifically, Σ CTA and Σ CTB can satisfy: 0.5< Σ CTA/Σ CTB < 1.8.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression (N3+ N4+ N5)/3>1.5, where N3 is a refractive index of the third lens, N4 is a refractive index of the fourth lens, and N5 is a refractive index of the fifth lens. By controlling the refractive index of the third lens, the refractive index of the fourth lens and the refractive index of the fifth lens to satisfy (N3+ N4+ N5)/3>1.5, the length of the entire optical system can be effectively shortened, contributing to the ultra-thinning of the optical imaging system. More specifically, N3, N4, and N5 may satisfy: (N3+ N4+ N5)/3> 1.6.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 10.0< V4- (V3+ V5) <20.0, where V4 is an abbe number of the fourth lens, V3 is an abbe number of the third lens, and V5 is an abbe number of the fifth lens. By controlling the abbe number of the fourth lens, the abbe number of the third lens and the abbe number of the fifth lens to satisfy 10.0< V4- (V3+ V5) <20.0, it is helpful to improve the correction capability of the optical system for chromatic aberration. More specifically, V4, V3, and V5 may satisfy: 12.0< V4- (V3+ V5) < 19.0.

In an exemplary embodiment, the first lens may have a positive optical power, and the object side surface thereof may be convex and the image side surface thereof may be concave. The second lens may have a positive optical power and the object side surface may be convex. The image side surface of the third lens may be concave. The fourth lens may have a positive optical power. The focal power and the face type of the first lens of reasonable collocation, the object side face of the second lens sets up to the convex surface, and the image side face of the third lens sets up to the concave surface, and rational distribution focal power makes light in the transmission, can be steady, helps balanced aberration, improves the resolving power.

In an exemplary embodiment, the fifth lens element may have a negative power, and the object-side surface thereof may be convex and the image-side surface thereof may be concave. The seventh lens may have a positive optical power. The eighth lens may have a negative optical power, and the object side surface thereof may be concave. The imaging system is favorable for ensuring that the chief ray of the imaging system has a smaller incident angle when being incident to the image plane, and the relative illumination of the image plane is improved.

In an exemplary embodiment, the optical imaging lens of the present application may include at least one diaphragm. The diaphragm can restrict the light path and control the intensity of light. The stop may be provided at an appropriate position of the optical imaging lens, for example, the stop may be provided between the object side and the first lens.

In an exemplary embodiment, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an imaging surface.

In an exemplary embodiment, the effective focal length f of the optical imaging lens may be, for example, in the range of 4.73mm to 4.91mm, the effective focal length f1 of the first lens may be, for example, in the range of 6.0mm to 6.9mm, the effective focal length f2 of the second lens may be, for example, in the range of 13.8mm to 16.4mm, the effective focal length f3 of the third lens may be, for example, in the range of-17.1 mm to-11.4 mm, the effective focal length f4 of the fourth lens may be, for example, in the range of 7.9mm to 9.8mm, the effective focal length f5 of the fifth lens may be, for example, in the range of-13.0 mm to-10.0 mm, the effective focal length f6 of the sixth lens may be, for example, in the range of 8.0mm to 9.1mm, the effective focal length f7 of the seventh lens may be, for example, in the range of 14.1mm to 25.7mm, and the effective focal length f8 of the eighth lens may be, for example, in the range of 3.1mm to 3.7 mm.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, eight lenses as described above. By reasonably distributing the focal power, the surface type and the like of each lens and reasonably selecting the refractive index, the dispersion coefficient and the like of each lens, the optical imaging lens with the characteristics of large image surface, large aperture, ultra-thinning, high imaging quality and the like can be provided, and the application requirement of the main camera on the next generation of high-end smart phone can be well met.

In the embodiment of the present application, the mirror surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens may have at least one aspherical mirror surface, that is, at least one aspherical mirror surface may be included from the object side surface of the first lens to the image side surface of the eighth lens. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, and the imaging quality is further improved. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens is an aspherical mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although eight lenses are exemplified in the embodiment, the optical imaging lens is not limited to include eight lenses. The optical imaging lens may also include other numbers of lenses, if desired.

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

Example 1

An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

Table 1 shows basic parameters of the optical imaging lens of embodiment 1, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 1

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. The high-order term coefficients A usable for the aspherical mirror surfaces S1 to S16 in example 1 are shown in Table 2-1 and Table 2-2 below₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂And A₂₄。

TABLE 2-1

Flour mark	A16	A18	A20	A22	A24
						S1	-1.8590E-05	-5.2119E-05	-6.1956E-05	0.0000E+00	0.0000E+00
S2	4.7451E-04	2.4846E-04	1.0753E-04	0.0000E+00	0.0000E+00
						S3	3.7694E-05	-3.3949E-05	-5.8895E-05	0.0000E+00	0.0000E+00
S4	2.9821E-04	6.2649E-05	1.2107E-05	0.0000E+00	0.0000E+00
						S5	6.7755E-05	2.9825E-05	-2.0010E-06	0.0000E+00	0.0000E+00
S6	1.5050E-05	1.1550E-05	2.4534E-07	0.0000E+00	0.0000E+00
						S7	2.6847E-05	5.8307E-06	1.5890E-05	0.0000E+00	0.0000E+00
S8	2.0545E-04	1.9337E-04	1.2368E-04	0.0000E+00	0.0000E+00
						S9	5.2269E-06	2.0002E-04	8.6102E-05	0.0000E+00	0.0000E+00
S10	-3.8867E-04	2.6162E-04	6.3249E-05	0.0000E+00	0.0000E+00
						S11	-7.4169E-04	-4.0312E-04	-8.2995E-05	0.0000E+00	0.0000E+00
S12	2.7579E-04	-3.6496E-04	-4.5515E-05	2.8869E-05	0.0000E+00
						S13	-8.0818E-04	-5.6361E-04	2.9087E-06	-5.4970E-05	-3.0152E-04
S14	6.6431E-04	-3.8878E-04	-1.5168E-04	-2.1948E-04	4.5695E-06
						S15	1.0137E-03	2.1877E-05	1.7522E-07	1.5576E-06	1.9491E-06
S16	1.3323E-03	3.8288E-04	-1.5224E-04	3.4261E-05	-2.3728E-04

Tables 2 to 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.

Example 2

An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 3, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

Table 3 shows basic parameters of the optical imaging lens of embodiment 2, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 4-1 and 4-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 through S16 in example 2₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂And A₂₄Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 3

TABLE 4-1

Flour mark	A16	A18	A20	A22	A24
						S1	-8.9591E-06	4.1271E-06	-8.1524E-07	0.0000E+00	0.0000E+00
S2	-9.7789E-05	-4.8838E-05	-1.2936E-06	0.0000E+00	0.0000E+00
						S3	-2.8750E-05	1.0853E-06	-4.8408E-06	0.0000E+00	0.0000E+00
S4	5.7759E-05	-6.3054E-06	3.7211E-06	0.0000E+00	0.0000E+00
						S5	3.1846E-04	1.9330E-05	6.0346E-07	0.0000E+00	0.0000E+00
S6	3.0639E-05	9.1177E-06	2.6777E-06	0.0000E+00	0.0000E+00
						S7	-6.1185E-07	1.5288E-05	-6.9808E-06	0.0000E+00	0.0000E+00
S8	-1.4539E-04	1.4530E-04	-3.8326E-05	0.0000E+00	0.0000E+00
						S9	-3.5697E-04	1.7506E-04	-7.4464E-05	0.0000E+00	0.0000E+00
S10	-3.6215E-04	1.0863E-04	-5.4631E-05	0.0000E+00	0.0000E+00
						S11	1.1383E-05	-1.2792E-05	-4.4608E-05	0.0000E+00	0.0000E+00
S12	1.3235E-03	-5.6635E-04	-2.5708E-04	9.8490E-05	0.0000E+00
						S13	6.4780E-04	-1.1732E-03	3.9006E-04	2.9108E-04	-1.4523E-04
S14	5.9263E-04	-1.3947E-03	-1.2094E-03	-6.4072E-04	1.8205E-04
						S15	2.5515E-04	5.3557E-04	1.5350E-04	3.0029E-04	-1.2697E-04
S16	2.8926E-03	-1.0448E-03	6.3858E-04	5.3859E-04	-2.6511E-04

TABLE 4-2

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.

Example 3

An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 5, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

Table 5 shows basic parameters of the optical imaging lens of embodiment 3, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 6-1 and 6-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 3₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂And A₂₄Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 5

TABLE 6-1

Flour mark	A16	A18	A20	A22	A24
						S1	-8.0434E-06	5.3338E-06	-1.0090E-06	0.0000E+00	0.0000E+00
S2	-4.5014E-05	-2.1141E-05	8.1203E-06	0.0000E+00	0.0000E+00
						S3	-1.5514E-05	3.7425E-06	-2.8505E-06	0.0000E+00	0.0000E+00
S4	5.7559E-05	-3.0692E-06	-9.6992E-07	0.0000E+00	0.0000E+00
						S5	2.5787E-04	2.0880E-05	-7.4177E-06	0.0000E+00	0.0000E+00
S6	3.6834E-05	1.2624E-05	3.5698E-06	0.0000E+00	0.0000E+00
						S7	-3.1141E-05	1.7140E-07	-9.8944E-06	0.0000E+00	0.0000E+00
S8	-2.3665E-04	1.1642E-04	-4.4694E-05	0.0000E+00	0.0000E+00
						S9	-4.2805E-04	1.6266E-04	-8.0992E-05	0.0000E+00	0.0000E+00
S10	-4.2157E-04	7.6859E-05	-7.1308E-05	0.0000E+00	0.0000E+00
						S11	-2.3241E-05	-6.9969E-06	-4.0372E-05	0.0000E+00	0.0000E+00
S12	1.2952E-03	-5.4808E-04	-2.5679E-04	9.5532E-05	0.0000E+00
						S13	6.6805E-04	-1.1666E-03	3.8676E-04	2.8794E-04	-1.4778E-04
S14	3.5091E-04	-1.6870E-03	-1.1208E-03	-6.9098E-04	1.5922E-04
						S15	-3.2278E-05	3.2388E-04	9.5193E-05	2.9863E-04	-7.7833E-05
S16	2.6276E-03	-8.2206E-04	4.9658E-04	5.3900E-04	-3.1712E-04

TABLE 6-2

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens system according to embodiment 3 can achieve good imaging quality.

Example 4

An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 7, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

Table 7 shows basic parameters of the optical imaging lens of embodiment 4, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 4₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂And A₂₄Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

S1

7.2465E-03

3.3786E-03

7.6470E-04

2.2915E-04

2.1478E-05

1.6923E-05

S2

-1.9405E-02

4.2235E-03

9.7471E-04

-2.8145E-04

-2.7518E-04

-2.1662E-04

S3

-8.6623E-02

4.5846E-03

2.7296E-04

-2.0137E-04

-6.1202E-05

-2.2521E-05

S4

-1.0001E-01

8.5201E-03

6.5597E-04

-4.9453E-05

3.8110E-04

-1.7668E-04

S5

-6.8772E-02

8.5402E-03

3.3231E-03

-4.8695E-04

1.2924E-04

-1.1014E-04

S6

1.6982E-03

8.9372E-03

5.5519E-03

2.6563E-04

6.3354E-05

-9.7631E-05

S7

1.2587E-02

-1.2078E-02

5.5251E-03

5.3746E-04

2.6851E-04

8.8802E-06

S8

8.9212E-02

-2.9702E-02

6.4085E-03

-3.4682E-03

-1.5133E-03

-1.3475E-04

S9

-3.8679E-01

4.2355E-02

-4.6235E-03

1.1011E-03

-2.9198E-03

2.7706E-04

S10

-6.4245E-01

6.0165E-02

-7.6581E-03

8.1796E-03

-1.5444E-03

7.6667E-04

S11

-4.4414E-01

-5.6864E-02

4.9747E-04

6.5785E-03

1.7420E-03

3.7118E-04

S12

-1.8760E-01

9.9626E-02

-1.9899E-03

-7.6410E-03

-4.5844E-03

2.7334E-03

S13

-1.8497E+00

5.4533E-01

-1.0092E-01

-9.9174E-03

9.0930E-03

-1.3736E-03

S14

-1.1208E+00

-1.6494E-02

2.2360E-02

8.1247E-03

9.6755E-03

6.4169E-03

S15

3.3304E+00

-7.3160E-01

3.1224E-01

-1.2200E-01

4.9867E-02

-1.7474E-02

S16

-1.1295E+00

-4.1080E-02

1.4175E-01

-6.1311E-02

1.9320E-02

-1.3646E-02

TABLE 8-1

TABLE 8-2

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.

Example 5

An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 9, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

Table 9 shows basic parameters of the optical imaging lens of embodiment 5, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 10-1 and 10-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 5₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂And A₂₄Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 9

Flour mark

A4

A6

A8

A10

A12

A14

S1

1.2434E-03

1.5997E-03

2.7777E-04

9.5160E-05

-5.3178E-05

-1.8761E-06

S2

-2.5709E-02

1.6794E-03

1.1981E-03

-1.2563E-04

-9.2899E-05

-9.8573E-05

S3

-8.2124E-02

2.3949E-03

9.9818E-04

-2.9435E-04

-1.2458E-04

7.5106E-06

S4

-9.7455E-02

3.1932E-03

1.0698E-03

-8.7915E-04

2.1321E-04

-6.8986E-05

S5

-7.8370E-02

1.0057E-02

2.4996E-03

-8.1834E-04

1.4189E-04

-1.3413E-04

S6

-1.1656E-02

1.4637E-02

5.1526E-03

4.6190E-04

1.5778E-04

-9.0233E-05

S7

2.5287E-02

-1.8761E-02

2.9167E-03

3.8450E-04

3.9427E-04

-1.3314E-05

S8

1.0266E-01

-2.5858E-02

1.2817E-03

-3.0878E-03

-1.9205E-03

-3.2467E-04

S9

-3.8452E-01

4.6527E-02

-4.9446E-03

6.1053E-04

-3.6965E-03

-1.0425E-04

S10

-6.3201E-01

6.1153E-02

-3.5793E-03

8.7750E-03

-1.4523E-03

4.9711E-04

S11

-4.4819E-01

-4.5707E-02

4.1720E-03

9.2004E-03

1.9267E-03

1.6906E-04

S12

-1.8142E-01

1.0302E-01

-5.5940E-03

-6.9650E-03

-4.3683E-03

2.4410E-03

S13

-1.8310E+00

5.4496E-01

-1.0175E-01

-1.0191E-02

7.9966E-03

-1.1584E-03

S14

-1.1504E+00

3.2332E-02

-2.6090E-03

6.4919E-03

9.2298E-03

4.9942E-03

S15

3.2833E+00

-7.6763E-01

3.1722E-01

-1.2346E-01

5.3004E-02

-1.7379E-02

S16

-9.6946E-01

-1.3821E-01

1.3654E-01

-5.1164E-02

1.4107E-02

-1.1524E-02

TABLE 10-1

TABLE 10-2

Fig. 10A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 5, which represent the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

Example 6

An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 11, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

Table 11 shows basic parameters of the optical imaging lens of embodiment 6, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 12-1 and 12-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 6₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂And A₂₄Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

S1

6.8774E-03

3.2790E-03

7.4161E-04

2.2363E-04

1.9661E-05

1.7758E-05

S2

-2.0425E-02

3.9562E-03

9.0707E-04

-2.6696E-04

-2.3865E-04

-1.8495E-04

S3

-8.6199E-02

4.3441E-03

2.2382E-04

-2.3125E-04

-5.4605E-05

-1.9045E-05

S4

-1.0035E-01

8.4370E-03

6.6272E-04

-4.9280E-05

3.8096E-04

-1.7825E-04

S5

-6.9352E-02

9.1317E-03

3.2420E-03

-4.1361E-04

9.6292E-05

-1.3901E-04

S6

1.2039E-04

9.4827E-03

5.3837E-03

2.7799E-04

5.4042E-05

-9.7026E-05

S7

1.2765E-02

-1.1972E-02

5.2361E-03

4.3460E-04

2.2653E-04

-1.0198E-05

S8

9.1431E-02

-2.9656E-02

6.0276E-03

-3.4368E-03

-1.6222E-03

-1.5544E-04

S9

-3.8700E-01

4.2318E-02

-4.7068E-03

1.2275E-03

-3.1023E-03

2.5360E-04

S10

-6.4155E-01

6.1240E-02

-7.7611E-03

8.3797E-03

-1.5876E-03

7.7991E-04

S11

-4.4397E-01

-5.4913E-02

6.0170E-04

6.5919E-03

1.6614E-03

3.4461E-04

S12

-1.8852E-01

9.9752E-02

-1.7880E-03

-7.7484E-03

-4.5416E-03

2.7459E-03

S13

-1.8477E+00

5.4504E-01

-1.0112E-01

-9.8310E-03

9.1612E-03

-1.3121E-03

S14

-1.1213E+00

-1.0349E-02

2.1611E-02

9.2363E-03

9.6868E-03

6.6274E-03

S15

3.3222E+00

-7.3277E-01

3.1308E-01

-1.2215E-01

4.9917E-02

-1.7562E-02

S16

-1.1605E+00

-4.1884E-02

1.4065E-01

-6.0597E-02

1.9319E-02

-1.3750E-02

TABLE 12-1

TABLE 12-2

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.

Example 7

An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and a filter E9.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. The filter E9 has an object side S17 and an image side S18. The optical imaging lens has an imaging surface S19, and light from an object passes through the respective surfaces S1 to S18 in order and is finally imaged on the imaging surface S19.

Table 13 shows basic parameters of the optical imaging lens of embodiment 7, in which the radius of curvature and the thicknessThe units of degrees/distance are millimeters (mm). Tables 14-1 and 14-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S16 in example 7₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂And A₂₄Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

S1

3.8153E-04

1.2862E-03

2.7814E-04

8.3449E-05

-3.4511E-05

1.3508E-08

S2

-2.7648E-02

6.5367E-04

1.1406E-03

-7.2056E-05

-4.2497E-05

-7.1227E-05

S3

-8.0605E-02

1.1433E-03

1.2742E-03

-3.2191E-04

-1.6823E-04

6.7299E-06

S4

-9.8020E-02

3.2452E-03

9.6383E-04

-8.9618E-04

9.3283E-05

2.5296E-06

S5

-8.0487E-02

1.0445E-02

1.7103E-03

-6.5346E-04

1.4444E-04

-5.2478E-05

S6

-1.2193E-02

1.5202E-02

4.7569E-03

5.8212E-04

2.4579E-04

-4.3522E-05

S7

3.0662E-02

-1.8524E-02

3.1582E-03

4.6297E-04

4.7786E-04

2.2637E-05

S8

1.0226E-01

-2.4886E-02

1.4863E-03

-3.2393E-03

-2.1232E-03

-4.7190E-04

S9

-3.8444E-01

4.7714E-02

-4.4881E-03

2.0940E-04

-3.8515E-03

-3.0716E-04

S10

-6.2603E-01

6.3085E-02

-3.6216E-03

8.2839E-03

-1.4865E-03

4.2368E-04

S11

-4.4623E-01

-4.4665E-02

4.6963E-03

9.8601E-03

2.3464E-03

2.4161E-04

S12

-1.7248E-01

1.0378E-01

-7.9219E-03

-6.4788E-03

-3.8627E-03

2.1427E-03

S13

-1.8303E+00

5.4502E-01

-1.0260E-01

-1.0025E-02

7.6453E-03

-1.0692E-03

S14

-1.1701E+00

3.6130E-02

-6.9228E-03

4.5070E-03

8.8261E-03

4.7765E-03

S15

3.2750E+00

-7.7254E-01

3.1701E-01

-1.2346E-01

5.3655E-02

-1.7029E-02

S16

-1.0661E+00

-1.4822E-01

1.3009E-01

-4.4941E-02

1.3873E-02

-1.0096E-02

TABLE 14-1

Flour mark	A16	A18	A20	A22	A24
						S1	-1.7393E-05	9.4454E-06	2.7797E-06	0.0000E+00	0.0000E+00
S2	-7.9294E-06	-2.2717E-05	7.6206E-06	0.0000E+00	0.0000E+00
						S3	-8.8793E-06	9.5962E-06	-1.2794E-05	0.0000E+00	0.0000E+00
S4	9.5371E-06	-1.4672E-07	1.2416E-06	0.0000E+00	0.0000E+00
						S5	1.3362E-06	2.0831E-05	4.2164E-07	0.0000E+00	0.0000E+00
S6	-3.5174E-06	9.0159E-06	1.0233E-06	0.0000E+00	0.0000E+00
						S7	2.0476E-05	-1.7557E-05	-1.4253E-06	0.0000E+00	0.0000E+00
S8	-1.9179E-04	4.0569E-05	-2.7075E-06	0.0000E+00	0.0000E+00
						S9	-3.3762E-04	6.9072E-05	-2.6839E-05	0.0000E+00	0.0000E+00
S10	-4.0122E-04	-1.9857E-05	-5.6297E-05	0.0000E+00	0.0000E+00
						S11	-1.4452E-04	-1.2200E-04	-9.0051E-05	0.0000E+00	0.0000E+00
S12	1.0803E-03	-3.6267E-04	-2.2431E-04	7.2718E-05	0.0000E+00
						S13	5.4963E-04	-1.0729E-03	3.3539E-04	2.7006E-04	-1.6655E-04
S14	2.4085E-04	-1.7912E-03	-7.8268E-04	-5.3199E-04	1.4265E-04
						S15	7.5689E-04	-7.9454E-05	-3.2288E-06	4.2004E-05	2.6945E-05
S16	2.5073E-03	3.3103E-04	1.5586E-04	3.9712E-04	-4.9517E-04

TABLE 14-2

Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens according to embodiment 7 can achieve good imaging quality.

Further, in embodiments 1 to 7, the effective focal length values f1 to f8 of the respective lenses, the effective focal length f of the optical imaging lens, the distance TTL along the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, half the diagonal length ImgH of the effective pixel area on the imaging surface, half the Semi-FOV of the maximum field angle of the optical imaging lens, and the ratio f/EPD of the effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens are as shown in table 15.

Parameters/embodiments	1	2	3	4	5	6	7
								f1(mm)	6.84	6.09	6.15	6.08	6.22	6.09	6.61
f2(mm)	13.89	14.51	15.66	14.44	15.25	15.23	16.39
								f3(mm)	-16.53	-11.62	-12.70	-11.48	-13.37	-12.00	-17.06
f4(mm)	9.75	9.01	8.31	9.13	8.41	8.83	7.93
								f5(mm)	-12.96	-11.31	-10.68	-11.40	-10.86	-10.89	-10.02
f6(mm)	8.93	8.14	8.49	8.03	8.88	8.02	8.89
								f7(mm)	25.62	14.62	14.54	14.21	16.36	14.11	16.92
f8(mm)	-3.04	-2.83	-2.79	-2.89	-2.79	-2.89	-2.80
								f(mm)	4.90	4.74	4.74	4.76	4.79	4.77	4.81
TTL(mm)	5.78	5.78	5.78	5.78	5.78	5.78	5.78
								ImgH(mm)	5.12	5.12	5.12	5.12	5.12	5.12	5.12
Semi-FOV(°)	45.1	46.3	46.4	46.2	46.0	46.1	45.8
								f/EPD	1.89	1.89	1.89	1.89	1.89	1.89	1.89

Table 15 examples 1 to 7 respectively satisfy the conditions shown in table 16.

Conditions/examples	1	2	3	4	5	6	7
								f×tan(Semi-FOV)	4.92	4.97	4.97	4.97	4.96	4.96	4.95
TTL/ImgH	1.13	1.13	1.13	1.13	1.13	1.13	1.13
								f12345/f678	-0.65	-0.47	-0.53	-0.43	-0.63	-0.42	-0.64
f123/T13	4.47	4.88	4.87	4.86	4.75	4.89	4.73
								[(R1+R2)/f1]/\|(R3+R4)/f2\|	0.52	1.61	0.41	1.36	0.37	0.72	0.54
R6/f3	-0.36	-0.71	-0.72	-0.72	-0.44	-0.64	-0.32
								f4/(R7+R8)+f5/(R9+R10)	-2.09	-1.80	-1.62	-1.81	-1.48	-1.70	-1.33
T56/T67+CT6/ET6	2.05	2.17	2.12	2.18	1.99	2.18	1.97
								ΣCTA/ΣCTB	1.21	0.67	1.04	0.80	1.24	0.98	1.58
(N3+N4+N5)/3	1.63	1.62	1.62	1.62	1.63	1.62	1.63
								V4-(V3+V5)	17.60	14.40	14.20	14.20	16.70	14.50	17.60

TABLE 16

The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, and an eighth lens element,

at least three convex surfaces are arranged in the first lens to the fourth lens;

at least three concave surfaces are arranged in the fifth lens to the eighth lens;

the third lens has a negative optical power;

the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface;

the sixth lens has positive focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and

the object side surface of the seventh lens element is convex,

the optical imaging lens satisfies:

f × tan (Semi-FOV) >4.8mm, wherein f is the effective focal length of the optical imaging lens, and the Semi-FOV is half of the maximum field angle of the optical imaging lens.

2. The optical imaging lens of claim 1, wherein a distance TTL between an object side surface of the first lens element and an imaging surface of the optical imaging lens along the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface satisfy:

TTL/ImgH<1.2。

3. the optical imaging lens according to claim 1, wherein a combined focal length f12345 of the first to fifth lenses and a combined focal length f678 of the sixth to eighth lenses satisfy:

-1.0<f12345/f678<0。

4. the optical imaging lens of claim 1, wherein a combined focal length f123 of the first lens to the third lens and a distance T13 on the optical axis from an object side surface of the first lens to an image side surface of the third lens satisfy:

3.0<f123/T13<5.0。

5. the optical imaging lens of claim 1, wherein the radius of curvature of the object-side surface of the first lens R1, the radius of curvature of the image-side surface of the first lens R2, the effective focal length of the first lens f1, the radius of curvature of the object-side surface of the second lens R3, the radius of curvature of the image-side surface of the second lens R4, and the effective focal length of the second lens f2 satisfy:

0.2<[(R1+R2)/f1]/|(R3+R4)/f2|<2.0。

6. the optical imaging lens of claim 1, wherein the radius of curvature R6 of the image side surface of the third lens and the effective focal length f3 of the third lens satisfy:

-1.0<R6/f3<0。

7. the optical imaging lens of claim 1, wherein the effective focal length f4 of the fourth lens, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, the effective focal length f5 of the fifth lens, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens satisfy:

-3.0<f4/(R7+R8)+f5/(R9+R10)<-1.0。

8. the optical imaging lens according to any one of claims 1 to 7, wherein a separation distance T56 of the fifth lens and the sixth lens on the optical axis, a separation distance T67 of the sixth lens and the seventh lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis and an edge thickness ET6 of the sixth lens satisfy:

1.5<T56/T67+CT6/ET6<2.5。

9. the optical imaging lens according to any one of claims 1 to 7, wherein a sum Σ CTA of central thicknesses on the optical axis of one of the first to fourth lenses having one convex surface and a sum Σ CTB of central thicknesses on the optical axis of one of the fifth to eighth lenses having one convex surface satisfy:

0.3<ΣCTA/ΣCTB<2.0。

10. the optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, and an eighth lens element,

the third lens has a negative optical power;

the object side surface of the seventh lens element is convex,

the optical imaging lens satisfies:

TTL/ImgH <1.2, wherein, TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens along the optical axis, and ImgH is half of the length of the diagonal line of the effective pixel area on the imaging surface.