CN113759511A

CN113759511A - Optical imaging lens group

Info

Publication number: CN113759511A
Application number: CN202111081688.7A
Authority: CN
Inventors: 张韵; 吕赛锋; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2021-12-07
Anticipated expiration: 2041-09-15
Also published as: CN113759511B

Abstract

The invention provides an optical imaging lens group. The optical imaging lens group sequentially comprises from an object side to an image side along an optical axis: the first lens has positive focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; a third lens having optical power; a fourth lens having a focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; a seventh lens having a negative optical power; wherein, the effective focal length f of the optical imaging lens group and the maximum field angle FOV of the optical imaging lens group satisfy: f tan (FOV/2) >5.5 mm. The invention solves the problem that the optical imaging lens group in the prior art is difficult to simultaneously consider miniaturization and large image surface.

Description

Optical imaging lens group

Technical Field

The invention relates to the technical field of optical imaging equipment, in particular to an optical imaging lens group.

Background

In recent years, with the development of science and technology, the requirements of people on mobile phone lenses are higher and higher, and mobile phone lenses with high imaging quality are favored more and more. However, as portable electronic products are becoming smaller, the requirement for the overall length of the camera lens is becoming more and more strict, which reduces the degree of freedom of design and increases the difficulty of design. In order to meet the requirement of miniaturization, the F number of the imaging lens of the mobile phone is basically more than 2.0, and the optical imaging system with the F number less than 2.0 is difficult to meet the imaging requirement of higher order. Meanwhile, how to obtain higher imaging quality and smaller aberration under the conditions of large aperture and large image plane also becomes a bottleneck which is difficult to break through.

That is to say, the optical imaging lens group in the prior art has the problem that the miniaturization and the large image surface are difficult to be simultaneously compatible.

Disclosure of Invention

The invention mainly aims to provide an optical imaging lens group to solve the problem that the optical imaging lens group in the prior art is small in size and difficult to simultaneously consider a large image plane.

To achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens group comprising, in order from an object side to an image side along an optical axis: the first lens has positive focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; a third lens having optical power; a fourth lens having a focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; a seventh lens having a negative optical power; wherein, the effective focal length f of the optical imaging lens group and the maximum field angle FOV of the optical imaging lens group satisfy: f tan (FOV/2) >5.5 mm.

Further, the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy: 0< f/EPD < 2.

Further, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens satisfy: -1.8< f5/f7< -1.

Further, the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens satisfy: -1.2< f1/f7< -0.8.

Further, an on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the optical imaging lens group and a half ImgH of a diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group satisfy: TTL/ImgH < 1.55.

Further, the central thickness CT3 of the third lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy: 1.5< CT3/CT4< 2.

Further, an on-axis pitch T56 between the fifth lens and the sixth lens and an on-axis pitch T45 between the fourth lens and the fifth lens satisfy: 0< T56/T45< 0.5.

Further, the curvature radius R14 of the image side surface of the seventh lens and the effective focal length f of the optical imaging lens group satisfy: 0< R14/f < 0.5.

Further, a radius of curvature R11 of the object-side surface of the sixth lens and a radius of curvature R12 of the image-side surface of the sixth lens satisfy: 0.9< R11/R12< 1.2.

Further, an on-axis spacing distance SAG22 between an intersection point of the image-side surface of the second lens and the optical axis to an effective radius vertex of the image-side surface of the second lens and an on-axis spacing distance SAG31 between an intersection point of the object-side surface of the third lens and the optical axis to an effective radius vertex of the object-side surface of the third lens satisfy: -2< SAG22/SAG31< -1.

Further, an on-axis distance T56 between the fifth lens and the sixth lens, a center thickness CT5 of the fifth lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0<10 × T56/(CT5+ CT6) <1.

Further, an on-axis spacing distance SAG71 between an intersection point of the object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens and a central thickness CT7 of the seventh lens on the optical axis satisfies: -2.2< SAG71/CT7< -1.2.

Further, an on-axis spacing distance SAG72 between an intersection point of the image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens and a central thickness CT7 of the seventh lens on the optical axis satisfies: -2< SAG72/CT7< -0.5.

Further, an on-axis spacing distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and a central thickness CT5 of the fifth lens on the optical axis satisfies: -1< SAG52/CT5< -0.5.

Further, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT72 of the image side surface of the seventh lens satisfy: 0.3< DT11/DT72< 0.6.

Further, an on-axis distance Tr9r14 between the object-side surface of the fifth lens and the image-side surface of the seventh lens and a maximum value MAX (DTr9r14) of maximum effective radii of the respective surfaces between the object-side surface of the fifth lens and the image-side surface of the seventh lens satisfy: 0.5< Tr9r14/MAX (DTr9r14) < 0.8.

Further, the maximum effective radius DT61 of the object side surface of the sixth lens and the maximum effective radius DT52 of the image side surface of the fifth lens satisfy: 0< (DT61-DT52)/DT52< 0.3.

Further, a center thickness CT1 of the first lens on the optical axis and a maximum effective radius DT11 of an object side surface of the first lens satisfy: 0.4< CT1/DT11< 0.7.

Further, an on-axis spacing distance SAG51 between an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, an on-axis spacing distance SAG52 between an intersection point of a central thickness CT5 of the fifth lens on the optical axis and the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens satisfy: -2.5< SAG51/(CT5-SAG52) < -1.2.

Further, the abbe number V2 of the second lens and the abbe number V6 of the sixth lens satisfy: 0.5<2 x V2/V6< 0.8.

According to another aspect of the present invention, there is provided an optical imaging lens group comprising, in order from an object side to an image side along an optical axis: the first lens has positive focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; a third lens having optical power; a fourth lens having a focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; a seventh lens having a negative optical power; wherein an on-axis distance T34 between the third lens and the fourth lens and an on-axis distance T23 between the second lens and the third lens satisfy: t34 x 10/T23< 1.

By applying the technical scheme of the invention, the optical imaging lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an image side along an optical axis, the first lens has positive focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; the seventh lens has negative focal power; wherein, the effective focal length f of the optical imaging lens group and the maximum field angle FOV of the optical imaging lens group satisfy: f tan (FOV/2) >5.5 mm.

Through the reasonable distribution of the focal power of each lens, the balance of low-order aberration generated by the optical imaging lens group is facilitated, and the imaging quality of the optical imaging lens group is greatly improved. By restraining the relation between the effective focal length f of the optical imaging lens group and half FOV/2 of the maximum field angle of the optical imaging lens group within a reasonable range, the sensitivity of tolerance can be reduced, the miniaturization of the system is favorably ensured, and the imaging effect of a large image plane of the system is realized. In addition, the optical imaging lens group has the advantages of large aperture, large image plane and good imaging performance.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view showing a configuration of an optical imaging lens group according to a first example of the present invention;

fig. 2 to 5 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group in fig. 1;

fig. 6 is a schematic view showing a configuration of an optical imaging lens group according to a second example of the present invention;

fig. 7 to 10 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens group in fig. 6;

fig. 11 is a schematic view showing a configuration of an optical imaging lens group according to a third example of the present invention;

fig. 12 to 15 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 group in fig. 11;

fig. 16 is a schematic view showing a configuration of an optical imaging lens group of example four of the present invention;

fig. 17 to 20 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 group in fig. 16;

fig. 21 is a schematic view showing a configuration of an optical imaging lens group of example five of the present invention;

fig. 22 to 25 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 group in fig. 21;

fig. 26 is a schematic view showing a configuration of an optical imaging lens group of example six of the present invention;

fig. 27 to 30 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 group in fig. 26;

fig. 31 is a schematic view showing the structure of an optical imaging lens group of example seven of the present invention;

fig. 32 to 35 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 group in fig. 31;

fig. 36 is a schematic view showing a configuration of an optical imaging lens group of example eight of the present invention;

fig. 37 to 40 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 group in fig. 36.

Wherein the figures include the following reference numerals:

STO, stop; e1, first lens; s1, the object side surface of the first lens; s2, an image side surface of the first lens; e2, second lens; s3, the object side surface of the second lens; s4, an image side surface of the second lens; e3, third lens; s5, the object side surface of the third lens; s6, an image side surface of the third lens; e4, fourth lens; s7, the object side surface of the fourth lens; s8, an image side surface of the fourth lens element; e5, fifth lens; s9, the object side surface of the fifth lens; s10, an image side surface of the fifth lens element; e6, sixth lens; s11, the object-side surface of the sixth lens element; s12, an image side surface of the sixth lens element; e7, seventh lens; s13, an object-side surface of the seventh lens; s14, an image side surface of the seventh lens element; e8, optical filters; s15, the object side surface of the optical filter; s16, the image side surface of the optical filter; and S17, imaging surface.

Detailed Description

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 invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all 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.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

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. The surface of each lens close to the object side becomes the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The determination of the surface shape in the paraxial region can be performed by determining whether or not the surface shape is concave or convex, based on the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in a lens database (lens data) in optical software) in accordance with the determination method of a person ordinarily skilled in the art. For the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.

The invention provides an optical imaging lens group, aiming at solving the problem that the miniaturization and large image surface of the optical imaging lens group in the prior art are difficult to be simultaneously considered.

Example one

As shown in fig. 1 to 40, the optical imaging lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, where the first lens element has positive power and an object-side surface of the first lens element is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; the seventh lens has negative focal power; wherein, the effective focal length f of the optical imaging lens group and the maximum field angle FOV of the optical imaging lens group satisfy: f tan (FOV/2) >5.5 mm.

Preferably, 5.7mm < f tan (FOV/2) <5.9 mm.

Through the reasonable distribution of the focal power of each lens, the balance of low-order aberration generated by the optical imaging lens group is facilitated, and the imaging quality of the optical imaging lens group is greatly improved. By restraining the relation between the effective focal length f of the optical imaging lens group and the maximum field angle FOV of the optical imaging lens group within a reasonable range, the sensitivity of tolerance can be reduced, the miniaturization of the system is favorably ensured, and the imaging effect of a large image plane of the system is realized. In addition, the optical imaging lens group has the advantages of large aperture, large image plane and good imaging performance.

In the present embodiment, the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy: 0< f/EPD < 2. The characteristic of large aperture can be realized by reasonably distributing the focal power of the system to ensure that the F number of the system is less than 2. Preferably, 1.6< f/EPD < 1.8.

In the present embodiment, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens satisfy: -1.8< f5/f7< -1. By reasonably controlling the ratio of the effective focal length f5 of the fifth lens to the effective focal length f7 of the seventh lens, the focal power of the system can be reasonably distributed, so that the positive and negative spherical aberration of the front group lens and the rear group lens are mutually offset. Preferably, -1.6< f5/f7< -1.1.

In the present embodiment, the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens satisfy: -1.2< f1/f7< -0.8. By reasonably controlling the ratio of the effective focal length f1 of the first lens to the effective focal length f7 of the seventh lens, the focal power of the system can be reasonably distributed, so that the positive and negative spherical aberration of the front group lens and the rear group lens are mutually offset. Preferably, -1.1< f1/f7< -0.9.

In this embodiment, an on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the optical imaging lens group and a half ImgH of a diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group satisfy: TTL/ImgH < 1.55. The ratio of the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group to the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group is in a reasonable range, so that the size of the system is effectively reduced, and the ultrathin characteristic of the optical imaging lens group is guaranteed. Preferably, 1.4< TTL/ImgH < 1.50.

In the present embodiment, the central thickness CT3 of the third lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy: 1.5< CT3/CT4< 2. By reasonably constraining the conditional expression, the distortion of the system can be reasonably regulated and controlled, and finally the distortion of the system is in a certain range. Preferably, 1.6< CT3/CT4< 1.8.

In the present embodiment, the on-axis pitch T56 between the fifth lens and the sixth lens and the on-axis pitch T45 between the fourth lens and the fifth lens satisfy: 0< T56/T45< 0.5. By reasonably constraining the conditional expression, the field curvature contribution of each field can be controlled in a reasonable range, and the field curvature of the marginal field is mainly balanced. Preferably, 0< T56/T45< 0.3.

In the present embodiment, a radius of curvature R14 of the image-side surface of the seventh lens and the effective focal length f of the optical imaging lens group satisfy: 0< R14/f < 0.5. By reasonably constraining the conditional expression, the deflection angle of the marginal field of view at the seventh lens can be controlled, and the sensitivity of the system can be effectively reduced. Preferably 0.3< R14/f < 0.4.

In the present embodiment, a radius of curvature R11 of the object-side surface of the sixth lens and a radius of curvature R12 of the image-side surface of the sixth lens satisfy: 0.9< R11/R12< 1.2. By reasonably constraining the conditional expression, the deflection angle of light can be reduced, so that the system can better realize deflection of a light path. Preferably, 1.0< R11/R12< 1.1.

In the embodiment, the on-axis spacing distance SAG22 between the intersection point of the image-side surface of the second lens and the optical axis to the effective radius vertex of the image-side surface of the second lens and the on-axis spacing distance SAG31 between the intersection point of the object-side surface of the third lens and the optical axis to the effective radius vertex of the object-side surface of the third lens satisfy: -2< SAG22/SAG31< -1. The condition is controlled within a reasonable range, so that the miniaturization of the module can be realized in a better balance mode, and the spherical aberration of the second lens and the spherical aberration of the third lens can be mutually offset. Preferably, -1.6< SAG22/SAG31< -1.2.

In the present embodiment, the on-axis distance T56 between the fifth lens and the sixth lens, the central thickness CT5 of the fifth lens on the optical axis, and the central thickness CT6 of the sixth lens on the optical axis satisfy: 0<10 × T56/(CT5+ CT6) <1. By reasonably constraining the conditional expression, the total length of the optical system can be effectively controlled, and the ultrathin property is realized; meanwhile, the high sensitivity of the on-axis distance between the fifth lens and the sixth lens to the field curvature of the fringe field can be effectively reduced. Preferably, 0.1<10 × T56/(CT5+ CT6) < 0.7.

In the present embodiment, an on-axis spacing distance SAG71 between an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens and a central thickness CT7 of the seventh lens on the optical axis satisfies: -2.2< SAG71/CT7< -1.2. The conditional expression is satisfied, the incident angle of the chief ray on the object side surface of the seventh lens can be effectively reduced, and the matching degree of the optical imaging lens group and the chip can be improved. Preferably, -2.1< SAG71/CT7< -1.2.

In the present embodiment, an on-axis spacing distance SAG72 between an intersection point of the image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens and a central thickness CT7 of the seventh lens on the optical axis satisfies: -2< SAG72/CT7< -0.5. The conditional expression is satisfied, the incident angle of the chief ray on the image side surface of the seventh lens can be effectively reduced, and the matching degree of the optical imaging lens group and the chip can be improved. Preferably, -2.0< SAG72/CT7< -0.8.

In the present embodiment, an on-axis spacing distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and a central thickness CT5 of the fifth lens on the optical axis satisfies: -1< SAG52/CT5< -0.5. By controlling the position relation of the fifth lens on the optical axis, the problem of field curvature sensitivity of the whole optical imaging lens group is effectively improved, and the astigmatism and coma contribution of the fifth lens in the whole system is reduced. Preferably, -0.9< SAG52/CT5< -0.7.

In the present embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT72 of the image-side surface of the seventh lens satisfy: 0.3< DT11/DT72< 0.6. By reasonably constraining the conditional expression, the light transmission amount of the optical imaging lens group can be effectively increased, the relative illumination of the marginal field of view is improved, and the optical system has good imaging quality in a dark environment. Preferably 0.4< DT11/DT72< 0.5.

In this embodiment, an on-axis distance Tr9r14 between the object-side surface of the fifth lens and the image-side surface of the seventh lens and a maximum value MAX (DTr9r14) of maximum effective radii of the respective surfaces between the object-side surface of the fifth lens and the image-side surface of the seventh lens satisfy: 0.5< Tr9r14/MAX (DTr9r14) < 0.8. The curvature radius and the edge field angle of the object side surface of the fifth lens and the image side surface of the seventh lens can be effectively controlled within a certain range, and the sensitivity of the fifth lens and the sensitivity of the seventh lens are reduced; while preventing the thickness ratio of the fifth lens and the seventh lens from being excessively large, improving the workability of the lenses. Preferably 0.6< Tr9r14/MAX (DTr9r14) < 0.7.

In the present embodiment, the maximum effective radius DT61 of the object-side surface of the sixth lens and the maximum effective radius DT52 of the image-side surface of the fifth lens satisfy: 0< (DT61-DT52)/DT52< 0.3. The conditional expression is satisfied, so that the system can ensure normal light transition and normal and stable deflection angle when the double optical rings are switched. Preferably, 0< (DT61-DT52)/DT52< 0.2.

In the present embodiment, the central thickness CT1 of the first lens on the optical axis and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 0.4< CT1/DT11< 0.7. Satisfying the conditional expression, the thickness ratio of the first lens can be ensured in a reasonable range, and the processability of the lens is greatly improved. Preferably 0.5< CT1/DT11< 0.6.

In the present embodiment, the on-axis spacing distance SAG51 between the intersection point of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens, the on-axis spacing distance SAG52 between the center thickness CT5 of the fifth lens on the optical axis and the intersection point of the image-side surface of the fifth lens and the optical axis to the effective radius vertex of the image-side surface of the fifth lens satisfy: -2.5< SAG51/(CT5-SAG52) < -1.2. The curvature radius and the edge opening angle of the object side surface of the fifth lens and the overall thickness ratio of the fifth lens can be controlled within a certain range, the tolerance sensitivity of the fifth lens is effectively reduced, and the machinability is improved. Preferably, -2.4< SAG51/(CT5-SAG52) < -1.4.

In the present embodiment, the abbe number V2 of the second lens and the abbe number V6 of the sixth lens satisfy: 0.5<2 x V2/V6< 0.8. The refractive index difference between the materials of the second lens and the sixth lens can be effectively controlled when the conditional expression is met, so that the marginal light rays are in stable transition, and the performance of a marginal field of view is improved; meanwhile, the integral optical structure is prevented from being too large in offset, and the manufacturability is improved. Preferably, 2 × V2/V6 is 0.65.

Example two

As shown in fig. 1 to 40, the optical imaging lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, where the first lens element has positive power and an object-side surface of the first lens element is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has focal power, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; the seventh lens has negative focal power; wherein an on-axis distance T34 between the third lens and the fourth lens and an on-axis distance T23 between the second lens and the third lens satisfy: t34 x 10/T23< 1. Preferably, 0.4< T34 x 10/T23< 1.

Through the reasonable distribution of the focal power of each lens, the balance of low-order aberration generated by the optical imaging lens group is facilitated, and the imaging quality of the optical imaging lens group is greatly improved. By controlling the relation between the on-axis distance T34 between the third lens and the fourth lens and the on-axis distance T23 between the second lens and the third lens within a reasonable range, the peak value and the curvature of field contribution of the marginal field of view are mainly controlled within a reasonable range, so that the imaging quality is ensured. In addition, the optical imaging lens group has the advantages of large aperture, large image plane and good imaging performance.

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

The optical imaging lens group in the present application may employ a plurality of lenses, such as the seven lenses described above. By reasonably distributing the focal power, the surface shape, the central thickness of each lens, the axial distance between each lens and the like, the aperture of the optical imaging lens group can be effectively increased, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the optical imaging lens group is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The optical imaging lens group has large aperture and large angle of view. The advantages of ultra-thin and good imaging quality can meet the miniaturization requirement of intelligent electronic products.

In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may all be glass lenses. The optical lens made of glass can inhibit the shift of the back focus of the optical imaging lens group along with the temperature change, so as to improve the system stability. Meanwhile, the glass material is adopted, so that the problem that the normal use of the lens is influenced due to the imaging blur of the lens caused by high and low temperature changes in the use environment can be avoided. For example, the optical imaging lens group designed by all-glass has a wide temperature range and can maintain stable optical performance within the range of-40 ℃ to 105 ℃. Specifically, when the importance is paid to the resolution quality and the reliability, the first lens to the seventh lens may be all glass aspherical lenses. Of course, in the application where the requirement of temperature stability is low, the first lens to the seventh lens in the optical imaging lens group can also be made of plastic. The optical lens is made of plastic, so that the manufacturing cost can be effectively reduced. Of course, the first lens to the seventh lens in the optical imaging lens group can also be made of plastic and glass in a matching way.

The application also provides an electronic device which comprises the optical imaging lens group and an imaging element for converting an optical image formed by the optical imaging lens group into an electric signal. The imaging element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a stand-alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The electronic device is equipped with the optical imaging lens group described above.

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

Specific surface types, parameters of the optical imaging lens group applicable to the above embodiments are further described below with reference to the drawings.

It should be noted that any one of the following examples one to eight is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 5, an optical imaging lens group of the first example of the present application is described. Fig. 1 shows a schematic diagram of an optical imaging lens group structure of example one.

As shown in fig. 1, the optical imaging lens assembly, in order from an object side to an image side, 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, a filter E8, and an image forming surface S17.

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

In this example, the total effective focal length f of the optical imaging lens group is 6.84mm, the maximum field angle FOV of the optical imaging lens group is 81.5 °, the total length TTL of the optical imaging lens group is 8.85mm, and the image height ImgH is 6.00 mm.

Table 1 shows a basic structural parameter table of the optical imaging lens group of example one, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 1

In the first example, the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric, and the surface shape of each aspheric lens can be defined by, but is not limited to, the following aspheric 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. Table 2 below gives the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20 that can be used for each of the aspherical mirrors S1-S14 in example one.

Flour mark	A4	A6	A8	A10	A12
						S1	-2.4592E-02	-1.1769E-02	-4.3913E-03	-1.2716E-03	-3.1270E-04
S2	-1.2223E-01	1.1966E-02	-6.4109E-03	1.1037E-03	-3.3129E-04
						S3	-2.3026E-01	2.8108E-02	-2.1739E-03	1.5254E-03	3.1202E-05
S4	-1.1020E-01	1.3817E-02	1.8230E-03	1.2955E-03	5.4455E-04
						S5	-2.0641E-01	-3.9570E-02	-1.0505E-03	1.2153E-03	7.7023E-04
S6	-2.3458E-01	-8.5589E-02	2.4792E-02	-6.7386E-03	-1.8731E-04
						S7	-2.9162E-01	8.8288E-03	2.0492E-02	-1.6600E-02	-1.3591E-03
S8	-4.6967E-01	8.1033E-02	1.1666E-02	-8.9560E-03	-3.4364E-05
						S9	1.3810E-01	3.0326E-02	3.1836E-02	-2.2693E-02	-2.8694E-03
S10	2.6272E-01	1.9079E-01	-8.4536E-03	-4.0550E-02	2.4643E-03
						S11	-2.7473E+00	1.0933E-01	1.5086E-01	-5.5219E-03	-5.9307E-03
S12	-2.7507E+00	4.4875E-02	5.6864E-02	-4.4363E-02	8.9158E-03
						S13	-4.1700E+00	1.1726E+00	-4.5093E-01	1.2181E-01	-3.8265E-02
S14	-3.4425E+00	1.0073E+00	-2.8031E-01	1.0868E-01	-4.3415E-02
						Flour mark	A14	A16	A18	A20
S1	-4.3179E-05	-1.2583E-05	0.0000E+00	0.0000E+00
						S2	6.5362E-05	-3.9173E-05	0.0000E+00	0.0000E+00
S3	7.2349E-05	-9.2150E-07	0.0000E+00	0.0000E+00
						S4	2.3940E-04	1.2113E-04	5.7004E-05	2.4763E-05
S5	2.6046E-04	1.6783E-04	7.3497E-05	5.8743E-05
						S6	-1.0381E-03	1.0382E-03	-2.8190E-04	7.5849E-05
S7	-8.3051E-04	8.0116E-04	-8.6821E-04	5.1653E-06
						S8	1.1650E-04	4.5468E-04	-9.0049E-05	1.0984E-04
S9	1.3971E-03	-3.1119E-05	-1.6186E-04	1.7563E-04
						S10	5.0341E-03	6.2184E-04	-1.3142E-03	3.4381E-04
S11	-1.5766E-02	-3.0466E-03	2.2422E-03	2.3150E-03
						S12	1.1560E-04	4.4393E-03	2.1266E-03	2.4191E-04
S13	1.4775E-02	-9.7112E-03	2.9070E-03	-4.0062E-04
						S14	6.4743E-03	-1.2123E-02	4.1459E-03	-4.1449E-03

TABLE 2

Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens group of example one, which represents a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens group. Fig. 3 shows astigmatism curves of the optical imaging lens group of the first example, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the optical imaging lens group of example one, which indicate distortion magnitude values corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the optical imaging lens group of the first example, which represents a deviation of different image heights of light rays on an imaging surface after passing through the optical imaging lens group.

As can be seen from fig. 2 to 5, the optical imaging lens group given in the first example can achieve good imaging quality.

Example two

As shown in fig. 6 to 10, an optical imaging lens group of example two of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 6 shows a schematic diagram of an optical imaging lens group structure of example two.

As shown in fig. 6, the optical imaging lens assembly, in order from an object side to an image side, 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, a filter E8, and an image forming surface S17.

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

In this example, the total effective focal length f of the optical imaging lens group is 6.89mm, the maximum field angle FOV of the optical imaging lens group is 80.4 °, the total length TTL of the optical imaging lens group is 8.86mm, and the image height ImgH is 6.00 mm.

Table 3 shows a basic structural parameter table of the optical imaging lens group of example two, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 3

Table 4 shows the high-order term coefficients that can be used for each aspherical mirror surface in example two, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark	A4	A6	A8	A10	A12
						S1	-1.8435E-02	-9.8545E-03	-4.1720E-03	-1.3855E-03	-4.0105E-04
S2	-1.2145E-01	1.5685E-02	-6.8598E-03	1.3456E-03	-4.0480E-04
						S3	-2.3199E-01	2.8793E-02	-2.6506E-03	1.6298E-03	7.0755E-06
S4	-1.0946E-01	1.4141E-02	1.9899E-03	1.4265E-03	5.8271E-04
						S5	-1.9913E-01	-3.9403E-02	-1.2079E-03	1.5170E-03	9.5691E-04
S6	-2.3036E-01	-8.4225E-02	2.3942E-02	-6.0063E-03	3.9121E-04
						S7	-2.9231E-01	9.6083E-03	2.0186E-02	-1.6314E-02	-6.7115E-04
S8	-4.6623E-01	8.0113E-02	1.3052E-02	-9.1965E-03	1.2204E-03
						S9	1.2460E-01	3.7372E-02	3.4010E-02	-2.2619E-02	-1.5046E-03
S10	2.6920E-01	1.9106E-01	-6.8115E-03	-3.8001E-02	2.2690E-03
						S11	-2.7508E+00	1.0736E-01	1.5081E-01	-5.5066E-03	-3.8375E-03
S12	-2.7187E+00	4.3969E-02	5.6120E-02	-5.3343E-02	9.0890E-03
						S13	-2.7187E+00	4.3969E-02	5.6120E-02	-5.3343E-02	9.0890E-03
S14	-3.4888E+00	1.0112E+00	-2.6137E-01	9.8349E-02	-3.9680E-02
						Flour mark	A14	A16	A18	A20
S1	-9.1778E-05	-2.0631E-05	0.0000E+00	0.0000E+00
						S2	5.9303E-05	-5.8186E-05	0.0000E+00	0.0000E+00
S3	6.7810E-05	-9.2150E-07	0.0000E+00	0.0000E+00
						S4	2.3153E-04	1.0945E-04	4.3874E-05	1.8464E-05
S5	3.7122E-04	1.8563E-04	7.3346E-05	3.7829E-05
						S6	-9.9897E-04	1.0620E-03	-1.9141E-04	8.5197E-05
S7	-9.4363E-04	9.1565E-04	-7.4360E-04	6.5489E-06
						S8	2.1443E-04	5.0619E-04	-1.2039E-04	9.3566E-05
S9	1.8764E-03	-9.3498E-05	-2.6886E-04	1.8701E-04
						S10	5.0946E-03	4.7574E-04	-1.2003E-03	2.8766E-04
S11	-1.5206E-02	-3.0280E-03	2.4011E-03	2.1175E-03
						S12	-5.0316E-03	2.9662E-03	1.1180E-03	-1.0637E-04
S13	-5.0316E-03	2.9662E-03	1.1180E-03	-1.0637E-04
						S14	4.3396E-03	-1.1699E-02	3.7213E-03	-3.9692E-03

TABLE 4

Fig. 7 shows on-axis chromatic aberration curves of the optical imaging lens group of example two, which represent the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens group. Fig. 8 shows astigmatism curves of the optical imaging lens group of example two, which represent meridional field curvature and sagittal field curvature. Fig. 9 shows distortion curves of the optical imaging lens group of example two, which indicate distortion magnitude values corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the optical imaging lens group of the second example, which represents a deviation of different image heights on an imaging surface after light passes through the optical imaging lens group.

As can be seen from fig. 7 to 10, the optical imaging lens group of example two can achieve good imaging quality.

Example III

As shown in fig. 11 to 15, an optical imaging lens group of example three of the present application is described. Fig. 11 shows a schematic diagram of an optical imaging lens group structure of example three.

As shown in fig. 11, the optical imaging lens assembly, in order from an object side to an image side, 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, a filter E8, and an image forming surface S17.

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

In this example, the total effective focal length f of the optical imaging lens group is 7.01mm, the maximum field angle FOV of the optical imaging lens group is 79.5 °, the total length TTL of the optical imaging lens group is 8.86mm, and the image height ImgH is 6.00 mm.

Table 5 shows a basic structural parameter table of the optical imaging lens group of example three, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 5

Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in example three, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark	A4	A6	A8	A10	A12
						S1	-1.6858E-02	-9.0129E-03	-4.0093E-03	-1.4271E-03	-4.3439E-04
S2	-1.1983E-01	1.6822E-02	-7.0695E-03	1.1663E-03	-5.0218E-04
						S3	-2.3326E-01	2.8493E-02	-3.0538E-03	1.5289E-03	-4.4305E-07
S4	-1.0910E-01	1.4768E-02	1.7673E-03	1.4686E-03	5.8937E-04
						S5	-2.0078E-01	-3.8526E-02	-1.6376E-03	1.6570E-03	1.2231E-03
S6	-2.2410E-01	-8.4413E-02	2.4892E-02	-4.8681E-03	7.0682E-04
						S7	-2.9533E-01	8.6939E-03	1.9679E-02	-1.7243E-02	-8.4955E-04
S8	-4.4868E-01	8.2138E-02	1.4540E-02	-9.6060E-03	2.3064E-03
						S9	1.0898E-01	4.2506E-02	3.3129E-02	-2.4005E-02	-2.2597E-03
S10	2.8426E-01	1.8802E-01	-6.9661E-03	-3.7684E-02	1.7667E-03
						S11	-2.7517E+00	1.0997E-01	1.5185E-01	-4.6792E-03	-5.2884E-03
S12	-2.6800E+00	6.2504E-02	5.6375E-02	-5.5212E-02	1.0133E-02
						S13	-4.2235E+00	1.1731E+00	-4.5064E-01	1.2296E-01	-3.8908E-02
S14	-3.6017E+00	1.0134E+00	-2.5581E-01	9.4302E-02	-3.7422E-02
						Flour mark	A14	A16	A18	A20
S1	-1.1023E-04	-1.7817E-05	0.0000E+00	0.0000E+00
						S2	2.8905E-06	-7.2526E-05	0.0000E+00	0.0000E+00
S3	5.4885E-05	-9.2150E-07	0.0000E+00	0.0000E+00
						S4	2.3606E-04	1.0521E-04	3.8737E-05	1.3095E-05
S5	4.9637E-04	2.3459E-04	7.7941E-05	3.9598E-05
						S6	-7.0384E-04	1.0971E-03	-1.5287E-04	5.6385E-05
S7	-1.2595E-03	5.8560E-04	-8.2082E-04	-3.7418E-05
						S8	-4.2771E-04	2.2559E-04	-4.4756E-06	2.2684E-04
S9	2.1695E-03	-9.4944E-05	-2.0035E-04	2.0388E-04
						S10	6.1434E-03	4.9814E-04	-1.2480E-03	3.9681E-05
S11	-1.6653E-02	-3.5259E-03	2.0921E-03	1.6116E-03
						S12	-7.1807E-03	2.8810E-03	2.1235E-04	-3.2973E-04
S13	1.5608E-02	-9.5846E-03	3.6564E-03	-8.3407E-04
						S14	4.1968E-03	-8.4703E-03	6.0773E-03	-2.3312E-03

TABLE 6

Fig. 12 shows on-axis chromatic aberration curves of the optical imaging lens group of example three, which represent the convergent focus deviations of light rays of different wavelengths after passing through the optical imaging lens group. Fig. 13 shows astigmatism curves of the optical imaging lens group of example three, which represent meridional field curvature and sagittal field curvature. Fig. 14 shows distortion curves of the optical imaging lens group of example three, which represent distortion magnitude values corresponding to different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of the optical imaging lens group of example three, which represents a deviation of different image heights on an imaging surface after light passes through the optical imaging lens group.

As can be seen from fig. 12 to 15, the optical imaging lens group given in example three can achieve good imaging quality.

Example four

As shown in fig. 16 to 20, an optical imaging lens group of example four of the present application is described. Fig. 16 shows a schematic diagram of an optical imaging lens group structure of example four.

As shown in fig. 16, the optical imaging lens assembly, in order from an object side to an image side, 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, a filter E8, and an image forming surface S17.

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

In this example, the total effective focal length f of the optical imaging lens group is 7.12mm, the maximum field angle FOV of the optical imaging lens group is 78.6 °, the total length TTL of the optical imaging lens group is 8.86mm, and the image height ImgH is 6.00 mm.

Table 7 shows a basic structural parameter table of the optical imaging lens group of example four, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 7

Table 8 shows the high-order term coefficients that can be used for each aspherical mirror surface in example four, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark	A4	A6	A8	A10	A12
						S1	-1.4247E-02	-8.2005E-03	-4.0111E-03	-1.4508E-03	-4.2997E-04
S2	-1.1864E-01	1.9579E-02	-6.4004E-03	1.5345E-03	-3.8142E-04
						S3	-2.3495E-01	2.9544E-02	-2.7265E-03	1.6533E-03	3.7168E-05
S4	-1.0814E-01	1.5778E-02	2.1058E-03	1.6510E-03	6.6426E-04
						S5	-2.0096E-01	-3.6509E-02	-3.8159E-04	2.2396E-03	1.4234E-03
S6	-2.3586E-01	-7.8403E-02	2.5484E-02	-5.5949E-03	1.8584E-03
						S7	-2.9506E-01	5.2197E-03	1.9490E-02	-1.8869E-02	-7.4569E-05
S8	-4.3534E-01	8.7722E-02	1.5553E-02	-1.1131E-02	2.6272E-03
						S9	1.1428E-01	5.1803E-02	3.1112E-02	-2.2263E-02	-1.5641E-03
S10	2.8690E-01	1.8387E-01	-6.9632E-03	-3.6642E-02	2.3822E-03
						S11	-2.7514E+00	1.0727E-01	1.5161E-01	-1.1762E-02	-5.7338E-03
S12	-2.6459E+00	5.2708E-02	4.9737E-02	-5.7436E-02	1.2181E-02
						S13	-4.2167E+00	1.1755E+00	-4.5258E-01	1.2220E-01	-3.9474E-02
S14	-3.7046E+00	1.0138E+00	-2.6411E-01	7.1381E-02	-3.4903E-02
						Flour mark	A14	A16	A18	A20
S1	-9.7828E-05	-1.5180E-05	0.0000E+00	0.0000E+00
						S2	4.1366E-05	-5.6397E-05	0.0000E+00	0.0000E+00
S3	5.5329E-05	-9.2150E-07	0.0000E+00	0.0000E+00
						S4	2.6456E-04	1.1834E-04	4.1704E-05	1.5418E-05
S5	5.8252E-04	2.5853E-04	8.3831E-05	3.3144E-05
						S6	-4.3098E-04	1.1358E-03	-9.0043E-05	5.1745E-05
S7	-1.4308E-03	4.3980E-04	-7.5562E-04	-7.5589E-05
						S8	-1.7564E-04	2.0063E-04	-1.0926E-04	1.1439E-04
S9	2.4732E-03	-2.8215E-04	-2.0740E-04	1.4764E-04
						S10	5.6428E-03	2.4001E-05	-1.0942E-03	1.5889E-04
S11	-1.6646E-02	-3.8750E-03	1.5908E-03	1.5071E-03
						S12	-8.2402E-03	2.2468E-03	-1.3677E-04	-2.8493E-04
S13	1.6324E-02	-9.7384E-03	3.6802E-03	-8.2001E-04
						S14	8.8400E-03	-1.1051E-02	5.3856E-03	-1.9029E-03

TABLE 8

Fig. 17 shows on-axis chromatic aberration curves of the optical imaging lens group of example four, which represent convergent focus deviations of light rays of different wavelengths after passing through the optical imaging lens group. Fig. 18 shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of example four. Fig. 19 shows distortion curves of the optical imaging lens group of example four, which represent distortion magnitude values corresponding to different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the optical imaging lens group of example four, which represents a deviation of different image heights on an imaging surface after light passes through the optical imaging lens group.

As can be seen from fig. 17 to 20, the optical imaging lens group given in example four can achieve good imaging quality.

Example five

As shown in fig. 21 to 25, an optical imaging lens group of example five of the present application is described. Fig. 21 shows a schematic diagram of an optical imaging lens group structure of example five.

As shown in fig. 21, the optical imaging lens assembly, in order from an object side to an image side, 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, a filter E8, and an image forming surface S17.

In this example, the total effective focal length f of the optical imaging lens group is 6.95mm, the maximum field angle FOV of the optical imaging lens group is 79.7 °, the total length TTL of the optical imaging lens group is 9.00mm, and the image height ImgH is 6.00 mm.

Table 9 shows a basic structural parameter table of the optical imaging lens group of example five, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 9

Table 10 shows the high-order term coefficients that can be used for each aspherical mirror surface in example five, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark	A4	A6	A8	A10	A12
						S1	-2.2673E-02	-9.6859E-03	-3.5758E-03	-1.0318E-03	-2.7909E-04
S2	-1.2460E-01	1.5458E-02	-6.7138E-03	1.2957E-03	-3.5816E-04
						S3	-2.3036E-01	2.8789E-02	-3.2168E-03	1.4248E-03	-5.9400E-05
S4	-1.0993E-01	1.3243E-02	1.3296E-03	1.0427E-03	4.2199E-04
						S5	-1.9530E-01	-3.8454E-02	-1.4618E-03	1.0837E-03	6.7686E-04
S6	-2.2755E-01	-8.4203E-02	2.4082E-02	-6.5863E-03	6.7345E-04
						S7	-2.9623E-01	9.3286E-03	2.0037E-02	-1.5226E-02	1.6514E-04
S8	-4.6987E-01	8.0125E-02	1.3583E-02	-7.6288E-03	9.9503E-04
						S9	1.3832E-01	3.8226E-02	3.4435E-02	-2.2523E-02	-1.6487E-03
S10	2.6730E-01	1.9077E-01	-6.9739E-03	-3.8075E-02	2.5604E-03
						S11	-2.7522E+00	1.0458E-01	1.4723E-01	-8.1946E-03	-3.2727E-03
S12	-2.7550E+00	3.4899E-02	6.0534E-02	-5.5145E-02	5.4221E-03
						S13	-4.1831E+00	1.1749E+00	-4.4968E-01	1.2299E-01	-3.8182E-02
S14	-3.3263E+00	1.0399E+00	-2.7388E-01	1.2593E-01	-3.5578E-02
						Flour mark	A14	A16	A18	A20
S1	-4.5735E-05	-1.6548E-05	0.0000E+00	0.0000E+00
						S2	7.0364E-05	-3.8756E-05	0.0000E+00	0.0000E+00
S3	3.8871E-05	-9.2150E-07	0.0000E+00	0.0000E+00
						S4	1.4477E-04	7.6370E-05	3.0731E-05	1.8278E-05
S5	2.4157E-04	1.2770E-04	5.8501E-05	3.7252E-05
						S6	-1.2098E-03	1.0466E-03	-2.8089E-04	8.4000E-05
S7	-8.6046E-04	1.0088E-03	-7.0266E-04	6.5381E-05
						S8	4.0414E-04	4.7039E-04	-4.0993E-05	6.7481E-05
S9	2.4222E-03	-2.8613E-05	-2.6610E-04	1.1320E-04
						S10	4.6838E-03	5.5384E-04	-1.2895E-03	3.1700E-04
S11	-1.5873E-02	-3.0448E-03	2.0078E-03	2.1859E-03
						S12	-5.9360E-03	3.4227E-03	1.1459E-03	1.6516E-04
S13	1.5240E-02	-8.6918E-03	2.5215E-03	-3.2445E-04
						S14	5.4932E-03	-1.0042E-02	3.8439E-03	-4.1989E-03

Watch 10

Fig. 22 shows on-axis chromatic aberration curves of the optical imaging lens group of example five, which represent convergent focus deviations of light rays of different wavelengths after passing through the optical imaging lens group. Fig. 23 shows astigmatism curves of the optical imaging lens group of example five, which represent meridional field curvature and sagittal field curvature. Fig. 24 shows distortion curves of the optical imaging lens group of example five, which represent distortion magnitude values corresponding to different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the optical imaging lens group of example five, which represents a deviation of different image heights on an imaging surface of light after passing through the optical imaging lens group.

As can be seen from fig. 22 to 25, the optical imaging lens group given in example five can achieve good imaging quality.

Example six

As shown in fig. 26 to 30, an optical imaging lens group of example six of the present application is described. Fig. 26 shows a schematic diagram of an optical imaging lens group structure of example six.

As shown in fig. 26, the optical imaging lens assembly, in order from an object side to an image side, 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, a filter E8, and an image forming surface S17.

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

In this example, the total effective focal length f of the optical imaging lens group is 7.03mm, the maximum field angle FOV of the optical imaging lens group is 79.3 °, the total length TTL of the optical imaging lens group is 9.00mm, and the image height ImgH is 6.00 mm.

Table 11 shows a basic structural parameter table of the optical imaging lens group of example six, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 11

Table 12 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark	A4	A6	A8	A10	A12
						S1	-2.4186E-02	-9.1236E-03	-3.3101E-03	-9.3671E-04	-2.6186E-04
S2	-1.2502E-01	1.6180E-02	-6.7977E-03	1.2745E-03	-3.6743E-04
						S3	-2.3164E-01	2.8911E-02	-3.7836E-03	1.3466E-03	-9.8723E-05
S4	-1.1129E-01	1.3638E-02	8.2604E-04	9.5621E-04	3.5207E-04
						S5	-1.9660E-01	-3.5856E-02	-1.7881E-03	1.0721E-03	7.3223E-04
S6	-2.1326E-01	-8.7090E-02	2.4595E-02	-6.5604E-03	1.0090E-03
						S7	-2.9595E-01	4.4484E-03	1.9859E-02	-1.6541E-02	5.0642E-04
S8	-4.5892E-01	8.6609E-02	1.6968E-02	-7.0127E-03	2.0278E-03
						S9	1.3947E-01	4.7379E-02	3.4738E-02	-2.4111E-02	-2.7049E-03
S10	2.7944E-01	1.8429E-01	-8.4613E-03	-3.7777E-02	2.4761E-03
						S11	-2.7597E+00	1.1160E-01	1.4448E-01	-5.4229E-03	-3.5301E-03
S12	-2.7313E+00	4.6073E-02	5.8680E-02	-5.7773E-02	2.2698E-03
						S13	-4.1735E+00	1.1732E+00	-4.5115E-01	1.2210E-01	-3.8651E-02
S14	-3.3062E+00	1.0508E+00	-2.7784E-01	1.3895E-01	-3.3228E-02
						Flour mark	A14	A16	A18	A20
S1	-4.5493E-05	-1.7318E-05	0.0000E+00	0.0000E+00
						S2	6.7771E-05	-4.1204E-05	0.0000E+00	0.0000E+00
S3	2.6900E-05	-9.2486E-06	0.0000E+00	0.0000E+00
						S4	1.1403E-04	5.8445E-05	2.1476E-05	1.5971E-05
S5	2.6504E-04	1.2139E-04	4.8162E-05	3.1022E-05
						S6	-8.7453E-04	7.7911E-04	-1.7664E-04	1.8910E-05
S7	-1.0319E-03	3.8854E-04	-6.0603E-04	-4.2559E-05
						S8	1.6482E-04	-8.4933E-05	3.2812E-05	5.7753E-05
S9	2.8709E-03	-5.1325E-04	-1.8383E-04	6.7899E-05
						S10	5.2222E-03	2.9252E-04	-1.0879E-03	2.0273E-04
S11	-1.7442E-02	-3.0645E-03	1.8681E-03	1.7227E-03
						S12	-9.1257E-03	3.7125E-03	5.2545E-04	1.6412E-04
S13	1.5931E-02	-8.4139E-03	2.4396E-03	-4.6422E-04
						S14	7.4947E-03	-5.3166E-03	6.3321E-03	-3.0425E-03

TABLE 12

Fig. 27 shows on-axis chromatic aberration curves of the optical imaging lens group of example six, which represent convergent focus deviations of light rays of different wavelengths after passing through the optical imaging lens group. Fig. 28 shows astigmatism curves of the optical imaging lens group of example six, which represent meridional field curvature and sagittal field curvature. Fig. 29 shows distortion curves of the optical imaging lens group of example six, which represent distortion magnitude values corresponding to different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the optical imaging lens group of example six, which represents a deviation of different image heights on an imaging surface of light rays after passing through the optical imaging lens group.

As can be seen from fig. 27 to 30, the optical imaging lens group given in example six can achieve good imaging quality.

Example seven

As shown in fig. 31 to 35, an optical imaging lens group of example seven of the present application is described. Fig. 31 shows a schematic diagram of an optical imaging lens group structure of example seven.

As shown in fig. 31, the optical imaging lens assembly, in order from an object side to an image side, 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, a filter E8, and an image forming surface S17.

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

In this example, the total effective focal length f of the optical imaging lens group is 7.12mm, the maximum field angle FOV of the optical imaging lens group is 77.7 °, the total length TTL of the optical imaging lens group is 8.86mm, and the image height ImgH is 5.91 mm.

Table 13 shows a basic structural parameter table of the optical imaging lens group of example seven, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Watch 13

Table 14 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example seven, wherein each of the aspherical mirror surface types can be defined by formula (1) given in example one above.

Flour mark	A4	A6	A8	A10	A12
						S1	-1.9233E-02	-6.8891E-03	-2.8526E-03	-9.3493E-04	-2.4412E-04
S2	-1.1677E-01	1.7402E-02	-4.1402E-03	1.4931E-03	-7.4750E-05
						S3	-2.3360E-01	2.5834E-02	-4.7063E-04	1.6194E-03	2.6912E-04
S4	-1.1008E-01	1.4066E-02	3.0557E-03	2.0351E-03	9.6995E-04
						S5	-2.0663E-01	-3.6604E-02	-6.0944E-05	2.5052E-03	1.6523E-03
S6	-2.4020E-01	-7.3655E-02	2.5298E-02	-5.5300E-03	2.6918E-03
						S7	-2.8720E-01	7.7033E-03	1.7162E-02	-1.8383E-02	6.3096E-04
S8	-4.4300E-01	8.5520E-02	1.3486E-02	-1.0643E-02	3.0207E-03
						S9	1.2651E-01	5.4405E-02	2.9698E-02	-1.9401E-02	-1.4407E-03
S10	2.9106E-01	1.8789E-01	-7.9102E-03	-3.5398E-02	1.8583E-03
						S11	-2.7445E+00	1.0877E-01	1.4441E-01	-1.3573E-02	-4.5222E-03
S12	-2.5991E+00	1.0775E-02	4.1251E-02	-5.4456E-02	1.5866E-02
						S13	-4.2199E+00	1.1863E+00	-4.5477E-01	1.2169E-01	-3.9238E-02
S14	-3.6061E+00	1.0301E+00	-2.6721E-01	5.9310E-02	-3.7166E-02
						Flour mark	A14	A16	A18	A20
S1	-4.8517E-05	-5.6701E-06	0.0000E+00	0.0000E+00
						S2	3.9982E-05	-3.1610E-05	0.0000E+00	0.0000E+00
S3	7.2117E-05	1.0457E-05	0.0000E+00	0.0000E+00
						S4	4.1113E-04	1.7979E-04	6.1927E-05	1.7423E-05
S5	7.3106E-04	3.3850E-04	1.1268E-04	4.2372E-05
						S6	-4.9701E-04	1.1128E-03	-1.4556E-04	6.1740E-05
S7	-1.5697E-03	4.5819E-04	-6.9297E-04	-1.6957E-05
						S8	6.0833E-04	5.5734E-04	-3.2831E-05	7.7770E-05
S9	2.7277E-03	-2.0432E-04	-2.2370E-04	-2.4901E-06
						S10	5.0778E-03	-2.7361E-04	-1.4130E-03	-8.2048E-05
S11	-1.6167E-02	-3.1663E-03	1.1288E-03	1.3850E-03
						S12	-6.8452E-03	4.1264E-03	3.9602E-04	3.3164E-04
S13	1.6490E-02	-9.2409E-03	3.2054E-03	-7.7535E-04
						S14	1.4059E-02	-1.1852E-02	4.4649E-03	-1.9504E-03

TABLE 14

Fig. 32 shows an on-axis chromatic aberration curve of an optical imaging lens group of example seven, which represents a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens group. Fig. 33 shows astigmatism curves of the optical imaging lens group of example seven, which represent meridional field curvature and sagittal field curvature. Fig. 34 shows distortion curves of the optical imaging lens group of example seven, which represent distortion magnitude values corresponding to different angles of view. Fig. 35 shows a chromatic aberration of magnification curve of the optical imaging lens group of example seven, which represents a deviation of different image heights on an imaging surface of light rays after passing through the optical imaging lens group.

As can be seen from fig. 32 to 35, the optical imaging lens group given in example seven can achieve good imaging quality.

Example eight

As shown in fig. 36 to 40, an optical imaging lens group of example eight of the present application is described. Fig. 36 shows a schematic diagram of an optical imaging lens group structure of example eight.

As shown in fig. 36, the optical imaging lens assembly, in order from an object side to an image side, 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, a filter E8, and an image forming surface S17.

In this example, the total effective focal length f of the optical imaging lens group is 7.19mm, the maximum field angle FOV of the optical imaging lens group is 77.4 °, the total length TTL of the optical imaging lens group is 8.85mm, and the image height ImgH is 5.91 mm.

Table 15 shows a basic structural parameter table of the optical imaging lens group of example eight, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Watch 15

Table 16 shows the high-order term coefficients that can be used for each aspherical mirror surface in example eight, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark	A4	A6	A8	A10	A12
						S1	-1.7218E-02	-6.6395E-03	-2.8042E-03	-8.8960E-04	-1.9649E-04
S2	-1.1278E-01	1.8071E-02	-3.7367E-03	1.2839E-03	-3.1888E-04
						S3	-2.3321E-01	2.6069E-02	-1.1297E-05	1.5668E-03	2.2834E-04
S4	-1.0998E-01	1.4858E-02	3.1799E-03	1.8970E-03	8.3452E-04
						S5	-2.0672E-01	-3.6839E-02	-5.4651E-04	2.4480E-03	1.4535E-03
S6	-2.3763E-01	-7.2805E-02	2.5432E-02	-5.0076E-03	2.9280E-03
						S7	-2.8551E-01	8.0893E-03	1.6418E-02	-1.8708E-02	7.5615E-04
S8	-4.4050E-01	8.4073E-02	1.3932E-02	-1.0832E-02	3.5459E-03
						S9	1.2091E-01	5.6517E-02	2.9032E-02	-1.9469E-02	-1.2605E-03
S10	2.9418E-01	1.8572E-01	-7.4896E-03	-3.4065E-02	1.4801E-03
						S11	-2.7470E+00	1.1327E-01	1.4627E-01	-1.3224E-02	-3.4150E-03
S12	-2.6066E+00	1.7101E-02	4.0774E-02	-5.4677E-02	1.7470E-02
						S13	-4.2101E+00	1.1843E+00	-4.5607E-01	1.2176E-01	-3.9213E-02
S14	-3.6586E+00	1.0429E+00	-2.7133E-01	5.1659E-02	-3.6816E-02
						Flour mark	A14	A16	A18	A20
S1	-2.0314E-05	4.4109E-06	0.0000E+00	0.0000E+00
						S2	-8.5088E-05	-6.9161E-05	0.0000E+00	0.0000E+00
S3	4.8353E-05	1.6257E-07	0.0000E+00	0.0000E+00
						S4	3.3596E-04	1.3745E-04	4.6278E-05	1.2148E-05
S5	6.1903E-04	2.4044E-04	7.3937E-05	2.2505E-05
						S6	-4.3863E-04	1.0908E-03	-1.7540E-04	8.9180E-05
S7	-1.6240E-03	3.9837E-04	-6.7066E-04	4.0214E-05
						S8	5.6996E-04	5.7618E-04	5.1138E-05	1.2084E-04
S9	2.6605E-03	-2.7159E-04	-2.2310E-04	1.5765E-05
						S10	5.1932E-03	-3.1008E-04	-1.1266E-03	-1.1058E-04
S11	-1.6406E-02	-3.9375E-03	9.3269E-04	1.1337E-03
						S12	-7.5786E-03	4.4965E-03	3.0197E-04	3.7589E-04
S13	1.6724E-02	-9.3217E-03	3.1749E-03	-8.0962E-04
						S14	1.5021E-02	-9.8600E-03	5.8351E-03	-1.6195E-03

TABLE 16

Fig. 37 shows on-axis chromatic aberration curves of the optical imaging lens group of example eight, which represent convergent focus deviations of light rays of different wavelengths after passing through the optical imaging lens group. Fig. 38 shows astigmatism curves of the optical imaging lens group of example eight, which represent meridional field curvature and sagittal field curvature. Fig. 39 shows distortion curves of the optical imaging lens group of example eight, which represent distortion magnitude values corresponding to different angles of view. Fig. 40 shows a chromatic aberration of magnification curve of the optical imaging lens group of example eight, which represents a deviation of different image heights on an imaging surface of light rays after passing through the optical imaging lens group.

As can be seen from fig. 37 to 40, the optical imaging lens group given in example eight can achieve good imaging quality.

To sum up, examples one to eight satisfy the relationships shown in table 17, respectively.

TABLE 17

Table 18 gives effective focal lengths f of the optical imaging lens groups of examples one to eight, effective focal lengths f1 to f5 of the respective lenses, and the like.

Parameter \ example	1	2	3	4	5	6	7	8
									TTL(mm)	8.85	8.86	8.86	8.86	9.00	9.00	8.86	8.85
ImgH(mm)	6.00	6.00	6.00	6.00	6.00	6.00	5.91	5.91
									FOV(°)	81.5	80.4	79.5	78.6	79.7	79.3	77.7	77.4
f(mm)	6.84	6.89	7.01	7.12	6.95	7.03	7.12	7.19
									f1(mm)	7.78	7.62	7.58	7.44	7.66	7.64	7.69	7.57
f2(mm)	-27.37	-25.06	-24.55	-23.81	-25.00	-25.43	-26.70	-24.60
									f3(mm)	20.43	18.12	15.24	18.11	19.59	15.90	21.55	18.48
f4(mm)	-21.78	-21.17	-17.46	-21.39	-21.48	-17.45	-25.87	-25.43
									f5(mm)	8.78	8.85	9.26	10.04	8.72	9.50	10.83	10.75
f6(mm)	28345.73	-1530.03	-1469.28	-493.01	-4539.95	750.50	527.54	-193.24
									f7(mm)	-7.52	-6.93	-6.89	-7.11	-7.40	-7.70	-7.11	-6.88

Watch 18

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical imaging lens assembly, comprising, in order from an object side to an image side along an optical axis:

a first lens having a positive focal power, an object side surface of the first lens being a convex surface;

the second lens has focal power, and the image side surface of the second lens is a concave surface;

a third lens having an optical power;

a fourth lens having an optical power;

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

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

a seventh lens having a negative optical power;

wherein the effective focal length f of the optical imaging lens group and the maximum field angle FOV of the optical imaging lens group satisfy: f tan (FOV/2) >5.5 mm.

2. The optical imaging lens group of claim 1, wherein an effective focal length f of the optical imaging lens group and an entrance pupil diameter EPD of the optical imaging lens group satisfy: 0< f/EPD < 2.

3. The optical imaging lens group of claim 1, wherein an effective focal length f5 of the fifth lens and an effective focal length f7 of the seventh lens satisfy: -1.8< f5/f7< -1.

4. The optical imaging lens group of claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f7 of the seventh lens satisfy: -1.2< f1/f7< -0.8.

5. The optical imaging lens group of claim 1, wherein an on-axis distance TTL from an object side surface of the first lens element to an imaging surface of the optical imaging lens group and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens group satisfy: TTL/ImgH < 1.55.

6. The optical imaging lens group of claim 1 wherein a center thickness CT3 of the third lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 1.5< CT3/CT4< 2.

7. The optical imaging lens group of claim 1 wherein an on-axis spacing T56 between the fifth lens and the sixth lens and an on-axis spacing T45 between the fourth lens and the fifth lens satisfies: 0< T56/T45< 0.5.

8. The optical imaging lens group of claim 1, wherein a radius of curvature R14 of an image side surface of the seventh lens and an effective focal length f of the optical imaging lens group satisfy: 0< R14/f < 0.5.

9. The optical imaging lens group of claim 1, wherein a radius of curvature R11 of an object-side surface of the sixth lens and a radius of curvature R12 of an image-side surface of the sixth lens satisfy: 0.9< R11/R12< 1.2.

10. An optical imaging lens assembly, comprising, in order from an object side to an image side along an optical axis:

a third lens having an optical power;

a fourth lens having an optical power;

a seventh lens having a negative optical power;

wherein an on-axis spacing between the third lens and the fourth lens, T34, and an on-axis spacing between the second lens and the third lens, T23, satisfies: t34 x 10/T23< 1.