CN210572973U

CN210572973U - Image pickup lens assembly

Info

Publication number: CN210572973U
Application number: CN201921352879.0U
Authority: CN
Inventors: 耿晓婷; 唐大维; 管磊; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-05-19
Anticipated expiration: 2029-08-20

Abstract

The present application discloses a photographing lens assembly, sequentially comprising, from an object side to an image side along an optical axis: a first lens having an optical power; a second lens with focal power, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a diaphragm; a third lens having a positive refractive power, an object-side surface of which is convex; a fourth lens having a negative refractive power, an object-side surface of which is concave; the image side surface of the fifth lens is a convex surface; the sixth lens with focal power has a convex object-side surface and a concave image-side surface, and at least one of the object-side surface and the image-side surface of the sixth lens has an inflection point; and a seventh lens element having a negative refractive power, wherein the object-side surface of the seventh lens element is convex, the image-side surface of the seventh lens element is concave, and at least one of the object-side surface and the image-side surface of the seventh lens element has an inflection point. The camera lens group satisfies the following conditional expression: TTL/ImgH multiplied by f is more than 3.00mm and less than 6.00 mm; and 1.00 < f5/f < 3.00.

Description

Image pickup lens assembly

Technical Field

The present invention relates to a photographing lens group, and more particularly, to a photographing lens group including seven lenses.

Background

At present, the ultra-thinning of mobile phones is a market trend, and the module technology is also continuously upgraded, wherein higher and higher requirements are also put on the imaging quality of mobile phone lenses. With the trend of mobile phones towards light and thin, the camera lens assembly used in combination with the mobile phone not only needs to have good image quality, but also needs to have light and thin characteristics, so as to effectively reduce the thickness of the mobile phone. How to ensure the size reduction on the basis of the traditional structure and improve the imaging quality is a big problem faced by the recent mobile phone lens design.

SUMMERY OF THE UTILITY MODEL

An aspect of the present application provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens having an optical power; a second lens with focal power, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a diaphragm; a third lens having a positive refractive power, an object-side surface of which is convex; a fourth lens having a negative refractive power, an object-side surface of which is concave; the image side surface of the fifth lens is a convex surface; a sixth lens element having a refractive power, wherein an object-side surface of the sixth lens element is convex, an image-side surface of the sixth lens element is concave, and at least one of the object-side surface and the image-side surface of the sixth lens element has an inflection point; and a seventh lens element having a negative refractive power, wherein the object-side surface of the seventh lens element is convex, the image-side surface of the seventh lens element is concave, and at least one of the object-side surface and the image-side surface of the seventh lens element has an inflection point.

In one embodiment, the distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens group on the optical axis, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the image capturing lens group, and the total effective focal length f of the image capturing lens group satisfy: TTL/ImgH multiplied by f is more than 3.00mm and less than 6.00 mm.

In one embodiment, the effective focal length f5 of the fifth lens element and the total effective focal length f of the image capturing lens assembly satisfy: f5/f is more than 1.00 and less than 3.00.

In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens may satisfy: 0.50 < R11/R12 < 1.50.

In one embodiment, the effective focal length f7 of the seventh lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 2.50 < f7/R10 < 5.50.

In one embodiment, the central thickness CT2 of the third lens on the optical axis and the separation distance T23 of the second lens and the third lens on the optical axis may satisfy: 1.00 < CT2/T23 < 3.00.

In one embodiment, the total effective focal length f of the image capturing lens group and the radius of curvature R3 of the object side surface of the second lens element satisfy: f/R3 is more than 0.50 and less than 2.00.

In one embodiment, a sum Σ AT of a distance TD on the optical axis from the object-side surface of the first lens element to the image-side surface of the seventh lens element and a distance between any two adjacent first lens elements to the seventh lens element on the optical axis may satisfy: sigma AT/TD < 0.42.

In one embodiment, a distance SAG21 on the optical axis from the intersection point of the object-side surface of the second lens and the optical axis to the effective radius vertex of the object-side surface of the second lens and a distance SAG22 on the optical axis from 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 may satisfy: 1.00 < (SAG21+ SAG22)/(SAG21-SAG22) < 2.00.

In one embodiment, the maximum effective radius DT61 of the object-side surface of the sixth lens and the maximum effective radius DT62 of the image-side surface of the sixth lens may satisfy: -20.00 < (DT61+ DT62)/(DT61-DT62) < -7.00.

In one embodiment, the effective focal length f7 of the seventh lens and the effective focal length f4 of the fourth lens may satisfy: 0.50 < f7/f4 < 3.50.

The optical imaging lens comprises seven lenses, and the optical focal power, the surface type, the center thickness of each lens, the axial distance between the lenses and the like are reasonably distributed, so that the optical imaging lens has at least one beneficial effect of ultra-thinning, high imaging quality, large aperture and the like.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 shows a schematic configuration diagram of a photographing lens group according to embodiment 1 of the present application;

fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image capturing lens group of embodiment 1;

fig. 3 shows a schematic configuration diagram of a photographing lens group according to embodiment 2 of the present application;

fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image capturing lens group of embodiment 2;

fig. 5 is a schematic view showing the structure of a photographing lens group according to embodiment 3 of the present application;

fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image capturing lens group of embodiment 3;

fig. 7 is a schematic view showing the structure of a photographing lens group according to embodiment 4 of the present application;

fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the image capturing lens group of embodiment 4;

fig. 9 is a schematic view showing the structure of a photographing lens group according to embodiment 5 of the present application;

fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the image capturing lens group of embodiment 5;

fig. 11 is a schematic view showing the structure of a photographing lens group according to embodiment 6 of the present application;

fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the image capturing lens group of embodiment 6.

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. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called 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 an example or illustration.

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 features, principles, and other aspects of the present application are described in detail below.

The image pickup lens group according to an exemplary embodiment of the present application may include, for example, seven lenses having optical powers, respectively a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the seventh lens may have a spacing distance therebetween.

In an exemplary embodiment, the first lens has an optical power; the second lens has focal power, and the object side surface of the second lens can be a convex surface, and the image side surface of the second lens can be a concave surface; the third lens can have positive focal power, and the object side surface of the third lens can be a convex surface; the fourth lens can have negative focal power, and the object side surface of the fourth lens can be a concave surface; the fifth lens can have positive focal power, and the image side surface of the fifth lens can be a convex surface; the sixth lens has focal power, the object side surface of the sixth lens can be a convex surface, the image side surface of the sixth lens can be a concave surface, and at least one of the object side surface and the image side surface of the sixth lens has an inflection point; and the seventh lens element may have a negative optical power, an object-side surface thereof may be convex, an image-side surface thereof may be concave, and at least one of the object-side surface and the image-side surface of the seventh lens element has an inflection point.

The object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface, so that the imaging lens group Fno is reduced, and meanwhile, light rays have a better convergence effect. The third lens has positive focal power, the fourth lens has negative focal power, and the fifth lens has positive focal power, so that the focal power of the shooting lens group is reasonably distributed, and the excessive focal power is prevented from being concentrated on one or two lenses. The object side surface of the third lens element is convex, the object side surface of the fourth lens element is concave, and the image side surface of the fifth lens element is convex, so that the system Fno is reduced, and simultaneously, the marginal rays are converged well on the imaging surface, which is helpful for increasing the imaging area of the photographing lens assembly. The convex-concave surface type of the sixth lens and the convex-concave surface type of the seventh lens are beneficial to improving the spherical aberration of the photographing lens group, so that the photographing lens group has better aberration correction capability. At least one of the object side surface and the image side surface of each lens in the last two lenses is ensured to have an inflection point, which is beneficial to correcting coma aberration of the camera lens, so that the camera lens group has better imaging quality.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 3.00mm < TTL/ImgH x f < 6.00mm, wherein TTL is the distance from the object side surface of the first lens to the imaging surface of the shooting lens group on the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the shooting lens group, and f is the total effective focal length of the shooting lens group. More specifically, TTL, ImgH, and f further may satisfy: 3.50mm < TTL/ImgH x f < 5.50 mm. The lens group can meet the requirement that the TTL/ImgH multiplied by f is more than 3.00mm and less than 6.00mm, not only can help to control the field angle of the camera lens group within a reasonable range, but also can help to enlarge the aperture of the camera lens group, thereby enhancing the imaging quality of the camera lens group in a dark environment.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 1.00 < f5/f < 3.00, wherein f5 is the effective focal length of the fifth lens element, and f is the total effective focal length of the image pickup lens group. More specifically, f5 and f further satisfy: f5/f is more than 1.20 and less than 2.90. The requirement that f5/f is more than 1.00 and less than 3.00 is met, the focal power of the fifth lens can be reasonably controlled, the focal power can be effectively prevented from being excessively concentrated on the fifth lens, the sensitivity of the fifth lens can be effectively reduced, and the fifth lens has better processing feasibility.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 0.50 < R11/R12 < 1.50, wherein R11 is a radius of curvature of an object-side surface of the sixth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens. More specifically, R11 and R12 may further satisfy: 0.70 < R11/R12 < 1.20. The curvature radius of the object side surface and the curvature radius of the image side surface of the sixth lens are controlled within a reasonable range, so that the central area of the lens can be effectively prevented from being excessively bent, the processing feasibility of the sixth lens is improved, and meanwhile, the correction of the camera lens group on spherical aberration is facilitated.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 2.50 < f7/R10 < 5.50, wherein f7 is the effective focal length of the seventh lens and R10 is the radius of curvature of the image side surface of the fifth lens. More specifically, f7 and R10 may further satisfy: 2.55 < f7/R10 < 5.50. The proportion of the effective focal length of the seventh lens and the curvature radius of the image side surface of the fifth lens is controlled within a reasonable range, so that the risk of generating ghost images between the seventh lens and the fifth lens can be effectively reduced, the camera lens group can keep miniaturization, meanwhile, the camera lens group has good manufacturability, and the post-processing mass production is facilitated.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 1.00 < CT2/T23 < 3.00, wherein CT2 is the central thickness of the second lens on the optical axis, and T23 is the separation distance between the second lens and the third lens on the optical axis. More specifically, CT2 and T23 further satisfy: 1.05 < CT2/T23 < 2.80. The ratio of the central thickness of the third lens on the optical axis to the distance between the second lens and the third lens on the optical axis is controlled in a reasonable range, which can not only help to reduce the size of the camera lens group, but also better improve the distortion of the camera lens group.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 0.50 < f/R3 < 2.00, where f is the total effective focal length of the image pickup lens group, and R3 is the radius of curvature of the object side surface of the second lens element. More specifically, f and R3 further satisfy: f/R3 is more than 0.80 and less than 2.00. The proportion of the total effective focal length of the camera lens group and the curvature radius of the object side surface of the second lens is reasonably controlled, so that the size of the camera lens group can be controlled while the camera lens group is ensured to have higher aberration correction capability, and the excessive concentration of the focal power of the camera lens group can be avoided. Through the mutual cooperation of each lens, the aberration of the camera lens group can be better corrected.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: Σ AT/TD < 0.42, where TD is the distance on the optical axis from the object-side surface of the first lens element to the image-side surface of the seventh lens element, Σ AT is the sum of the distances on the optical axis between any two adjacent first lens elements to the seventh lens element. The reasonable distribution each lens is at the epaxial interval distance of optical, can guarantee the processing and the equipment characteristic of the lens group of making a video recording, still is favorable to slowing down light deflection simultaneously, adjusts the field curvature of the lens group of making a video recording, reduces the degree of sensitivity, and then obtains better image quality.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 1.00 < (SAG21+ SAG22)/(SAG21-SAG22) < 2.00, wherein SAG21 is a distance on the optical axis from the intersection point of the object side surface of the second lens and the optical axis to the effective radius vertex of the object side surface of the second lens, and SAG22 is a distance on the optical axis from 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. The rise size of the object side surface and the imaging surface of the second lens is reasonably distributed, the fifth lens can be prevented from being too bent to reduce the processing difficulty, and the spherical aberration of the camera lens group is favorably reduced.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: -20.00 < (DT61+ DT62)/(DT61-DT62) < -7.00, where DT61 is the maximum effective radius of the object side face of the sixth lens and DT62 is the maximum effective radius of the image side face of the sixth lens. More specifically, DT61 and DT62 further satisfy: -17.00 < (DT61+ DT62)/(DT61-DT62) < -7.50. The maximum effective radius of the object side surface of the sixth lens element and the maximum effective radius of the image side surface of the sixth lens element are controlled within a reasonable range, so that the difference between the effective radii of the object side surface and the image side surface of the sixth lens element can be effectively prevented from being too large, the lens is favorable for processing and forming the lens, and the stability of the performance of the camera lens group is favorable for improving.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 0.50 < f7/f4 < 3.50, wherein f7 is the effective focal length of the seventh lens and f4 is the effective focal length of the fourth lens. More specifically, f7 and f4 may further satisfy: 0.70 < f7/f4 < 3.20. The effective focal length of the seventh lens of the camera lens group and the effective focal length of the fourth lens are controlled within a reasonable range, so that the risk of generating ghost images between the seventh lens and the fourth lens can be effectively reduced, the focal power of the camera lens group can be reasonably distributed, and the later-stage processing volume production is facilitated.

In an exemplary embodiment, the above-mentioned photographing lens group may further include a diaphragm. The diaphragm may be disposed at an appropriate position as needed, for example, between the second lens and the third lens. Optionally, the above-mentioned image pickup lens group may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element on the image plane.

The image pickup lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the camera lens group can be effectively reduced, the sensitivity of the imaging camera lens group is reduced, and the machinability of the camera lens group is improved, so that the camera lens group is more beneficial to production and processing and is suitable for portable electronic products. The application provides a seven-piece type camera lens group with high pixel, large aperture and ultrathin thickness. The camera lens group can provide an oversized diaphragm, so that the camera lens group has better imaging quality even in a dark environment. Meanwhile, due to the unique lens model design of the camera lens group, enough space can be provided for subsequent related adjustment well, and related structures and assembly processes are more flexible without reducing the imaging quality too much.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the seventh lens is an aspherical mirror surface. 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 during imaging can be eliminated as much as possible, thereby improving the imaging quality. 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, and the seventh lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, sixth, and seventh lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.

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

Specific examples of the image pickup lens group applicable to the above embodiments are further described below with reference to the drawings.

Example 1

An image capturing lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an image capturing lens group according to embodiment 1 of the present application.

As shown in fig. 1, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, 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 plane S17.

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

Table 1 shows a basic parameter table of the image pickup lens group of embodiment 1, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 1

In the present example, the total effective focal length f of the image capturing lens group is 3.04mm, the total length TTL of the image capturing lens group (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17 of the image capturing lens group) is 4.75mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image capturing lens group is 3.43mm, the maximum half field angle Semi-FOV of the image capturing lens group is 47.4 °, and the aperture value Fno is 1.60.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the seventh lens E7 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. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S14 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.1011E-01

-9.0413E-02

1.6740E-01

-2.4827E-01

2.6765E-01

-2.0121E-01

9.7562E-02

-2.7282E-02

3.3017E-03

S2

9.8862E-02

6.5830E-02

-1.4224E-01

1.3176E-01

1.0917E-01

-4.1097E-01

4.3577E-01

-2.1536E-01

4.1549E-02

S3

-1.2389E-01

2.6856E-01

-5.5053E-01

3.5417E-01

1.3389E+00

-4.0014E+00

4.8587E+00

-2.9001E+00

7.0315E-01

S4

-1.4842E-01

-9.3411E-02

1.2004E+00

-5.9362E+00

1.7339E+01

-3.1416E+01

3.4716E+01

-2.1414E+01

5.6775E+00

S5

-8.6628E-02

3.7091E-03

-4.7876E-01

2.3566E+00

-7.3472E+00

1.3869E+01

-1.5318E+01

9.1000E+00

-2.2194E+00

S6

-9.1135E-02

-1.8698E-01

6.8814E-01

-2.2706E+00

4.8295E+00

-6.5543E+00

5.5556E+00

-2.6946E+00

5.7160E-01

S7

6.5115E-02

-3.6458E-01

9.0268E-01

-1.1431E+00

7.5944E-01

7.9414E-01

-2.0852E+00

1.5169E+00

-3.7236E-01

S8

1.8319E-01

-1.0602E+00

2.1342E+00

-2.8218E+00

2.8885E+00

-2.1476E+00

1.0296E+00

-2.8245E-01

3.4951E-02

S9

2.8107E-01

-7.0856E-01

8.6800E-01

-6.6226E-01

2.7250E-01

-1.6579E-02

-3.5609E-02

1.3771E-02

-1.5357E-03

S10

1.4713E-01

-4.1472E-02

-1.9886E-01

2.4749E-01

-1.2534E-01

2.0244E-02

8.5002E-03

-4.3404E-03

5.5546E-04

S11

1.1401E-01

-3.0929E-01

3.5995E-01

-3.7192E-01

2.7020E-01

-1.2609E-01

3.5870E-02

-5.6277E-03

3.7173E-04

S12

-4.2175E-03

-3.5334E-03

-1.2288E-01

1.3990E-01

-7.8010E-02

2.5271E-02

-4.7674E-03

4.8254E-04

-2.0146E-05

S13

-5.6812E-01

1.9896E-01

-1.5641E-02

-7.6769E-03

2.4366E-03

-2.7536E-04

5.7172E-06

1.2920E-06

-7.8619E-08

S14

-6.4203E-01

4.1967E-01

-2.1799E-01

8.2796E-02

-2.1251E-02

3.5111E-03

-3.5496E-04

1.9900E-05

-4.7296E-07

TABLE 2

Fig. 2A shows a chromatic aberration curve on the axis of the image-taking lens group of embodiment 1, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 1. Fig. 2C shows a distortion curve of the image capturing lens group of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the imaging lens group 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 image capturing lens assembly of embodiment 1 can achieve good image quality.

Example 2

An image capturing lens group 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 configuration diagram of a photographing lens group according to embodiment 2 of the present application.

As shown in fig. 3, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, 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 plane S17.

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

In the present example, the total effective focal length f of the image-taking lens group is 3.14mm, the total length TTL of the image-taking lens group is 4.75mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 3.28mm, the maximum half field angle Semi-FOV of the image-taking lens group is 45.0 °, and the aperture value Fno is 1.59.

Table 3 shows a basic parameter table of the image pickup lens group of embodiment 2, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 3

TABLE 4

Fig. 4A shows a chromatic aberration curve on the axis of the image-taking lens group of embodiment 2, which represents the deviation of the convergent focus 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 image pickup lens group of embodiment 2. Fig. 4C shows a distortion curve of the image capturing lens group of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the imaging lens group 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 image capturing lens assembly according to embodiment 2 can achieve good image quality.

Example 3

A photographing lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural view of a photographing lens group according to embodiment 3 of the present application.

As shown in fig. 5, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, 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 plane S17.

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

In the present example, the total effective focal length f of the image-taking lens group is 2.47mm, the total length TTL of the image-taking lens group is 4.61mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 3.15mm, the maximum half field angle Semi-FOV of the image-taking lens group is 47.7 °, and the aperture value Fno is 1.53.

Table 5 shows a basic parameter table of the image pickup lens group of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

6.5967E-02

1.8043E-01

-8.4442E-01

1.8620E+00

-2.2756E+00

1.6427E+00

-6.9918E-01

1.6230E-01

-1.5870E-02

S2

7.4095E-01

-2.8668E+00

7.7440E+00

-1.3296E+01

1.5374E+01

-1.2060E+01

6.1828E+00

-1.8651E+00

2.4883E-01

S3

8.5837E-01

-4.9466E+00

1.6989E+01

-3.7379E+01

5.3986E+01

-5.0881E+01

3.0064E+01

-1.0087E+01

1.4635E+00

S4

-6.9359E-02

-1.5598E-01

1.3052E-01

8.2233E-01

-2.5827E+00

3.2472E+00

-1.9434E+00

4.5984E-01

0.0000E+00

S5

-1.9720E-01

1.6959E+00

-9.8798E+00

3.3411E+01

-7.0197E+01

9.2357E+01

-7.3896E+01

3.2838E+01

-6.2060E+00

S6

2.0967E-01

-2.7532E+00

1.4562E+01

-4.6468E+01

9.1951E+01

-1.1419E+02

8.6632E+01

-3.6701E+01

6.6563E+00

S7

-7.4651E-01

4.0677E+00

-1.7782E+01

4.8071E+01

-8.1061E+01

8.6444E+01

-5.6769E+01

2.0949E+01

-3.3220E+00

S8

1.3467E-01

-1.7469E+00

5.1960E+00

-1.0386E+01

1.4505E+01

-1.3179E+01

7.3210E+00

-2.2625E+00

3.0011E-01

S9

7.2912E-01

-2.5314E+00

5.3146E+00

-7.6722E+00

7.5878E+00

-5.0518E+00

2.1650E+00

-5.4086E-01

5.9998E-02

S10

1.6530E-01

-4.2029E-01

1.0866E+00

-1.9334E+00

2.1006E+00

-1.4144E+00

5.7899E-01

-1.3140E-01

1.2619E-02

S11

-1.7214E-01

2.4130E-01

-5.9759E-01

7.5872E-01

-5.7976E-01

2.7188E-01

-7.6086E-02

1.1654E-02

-7.5140E-04

S12

-2.7095E-02

-1.2719E-01

1.1188E-01

-7.1229E-02

2.9810E-02

-7.1723E-03

8.9988E-04

-4.6823E-05

1.8999E-07

S13

-5.9101E-01

3.7137E-01

-2.1682E-01

1.1715E-01

-4.3534E-02

1.0036E-02

-1.3792E-03

1.0391E-04

-3.3102E-06

S14

-5.2918E-01

3.8324E-01

-2.2519E-01

9.4505E-02

-2.6378E-02

4.7361E-03

-5.2434E-04

3.2534E-05

-8.6470E-07

TABLE 6

Fig. 6A shows a chromatic aberration curve on the axis of the image-taking lens group of embodiment 3, which represents the deviation of the convergent focus 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 image pickup lens group of embodiment 3. Fig. 6C shows a distortion curve of the image capturing lens group of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the imaging lens group 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 image capturing lens assembly of embodiment 3 can achieve good image quality.

Example 4

A photographing lens group according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of a photographing lens group according to embodiment 4 of the present application.

As shown in fig. 7, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, 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 plane S17.

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

In the present example, the total effective focal length f of the image-taking lens group is 3.35mm, the total length TTL of the image-taking lens group is 5.28mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 3.28mm, the maximum half field angle Semi-FOV of the image-taking lens group is 41.7 °, and the aperture value Fno is 1.84.

Table 7 shows a basic parameter table of the image pickup lens group of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

7.8655E-02

-3.1978E-02

3.2307E-02

-2.9629E-02

1.9703E-02

-9.2927E-03

2.8963E-03

-5.3486E-04

4.4569E-05

S2

7.6453E-02

7.2146E-03

-3.9151E-02

6.5769E-02

-6.2281E-02

3.4784E-02

-1.1015E-02

1.6680E-03

-7.4350E-05

S3

-4.2985E-02

9.1848E-02

-1.9043E-01

2.5421E-01

-1.9127E-01

5.2514E-02

2.8047E-02

-2.7269E-02

8.4892E-03

S4

-6.8039E-02

5.4501E-02

-1.2905E-01

2.6277E-01

-3.3602E-01

2.5363E-01

-1.0294E-01

1.7416E-02

0.0000E+00

S5

-3.7644E-02

1.4703E-02

-1.0322E-01

2.1992E-01

-2.9227E-01

2.3645E-01

-1.0855E-01

2.3952E-02

-1.3746E-03

S6

-2.5605E-02

-9.3509E-02

2.8617E-01

-6.6053E-01

9.3727E-01

-8.2182E-01

4.3724E-01

-1.2995E-01

1.6614E-02

S7

-7.8534E-02

8.7755E-02

-3.1774E-01

8.5101E-01

-1.3318E+00

1.3832E+00

-9.1448E-01

3.3757E-01

-5.2123E-02

S8

9.8581E-02

-5.4173E-01

8.3886E-01

-7.9043E-01

5.4917E-01

-2.7554E-01

8.9779E-02

-1.6751E-02

1.4199E-03

S9

2.7502E-01

-6.3027E-01

8.0802E-01

-7.3089E-01

4.7264E-01

-2.1394E-01

6.4297E-02

-1.1558E-02

9.4170E-04

S10

5.9026E-02

2.8549E-02

-1.0943E-01

7.1323E-02

-7.3663E-03

-1.2874E-02

7.1412E-03

-1.5439E-03

1.2461E-04

S11

-4.8246E-02

-3.9084E-02

2.3668E-02

-1.6389E-02

8.9740E-03

-3.0535E-03

6.0771E-04

-6.3507E-05

2.6473E-06

S12

-4.6214E-02

-6.0988E-03

-9.0598E-03

1.0480E-02

-5.0206E-03

1.3731E-03

-2.1651E-04

1.8150E-05

-6.2425E-07

S13

-2.1746E-01

6.6678E-02

-1.5195E-02

3.7755E-03

-7.9443E-04

1.0971E-04

-9.0928E-06

4.1253E-07

-7.9019E-09

S14

-2.3408E-01

1.0925E-01

-4.1582E-02

1.1453E-02

-2.0953E-03

2.4401E-04

-1.7291E-05

6.7817E-07

-1.1280E-08

TABLE 8

Fig. 8A shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 4, which represents the deviation of the convergent focus 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 image pickup lens group of embodiment 4. Fig. 8C shows a distortion curve of the image capturing lens group of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the imaging lens group 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 imaging lens assembly according to embodiment 4 can achieve good imaging quality.

Example 5

A photographing lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration diagram of a photographing lens group according to embodiment 5 of the present application.

As shown in fig. 9, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, 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 plane S17.

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

In the present example, the total effective focal length f of the image-taking lens group is 2.95mm, the total length TTL of the image-taking lens group is 4.41mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.85mm, the maximum half field angle Semi-FOV of the image-taking lens group is 32.6 °, and the aperture value Fno is 1.52.

Table 9 shows a basic parameter table of the image pickup lens group of embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 9

Watch 10

Fig. 10A shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 5, which represents the deviation of the convergent focus 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 image pickup lens group of embodiment 5. Fig. 10C shows a distortion curve of the image capturing lens group of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10A to 10D, the imaging lens assembly according to embodiment 5 can achieve good imaging quality.

Example 6

A photographing lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic configuration diagram of a photographing lens group according to embodiment 6 of the present application.

As shown in fig. 11, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a stop STO, 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 plane S17.

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

In the present example, the total effective focal length f of the image-taking lens group is 3.31mm, the total length TTL of the image-taking lens group is 4.94mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 3.15mm, the maximum half field angle Semi-FOV of the image-taking lens group is 41.1 °, and the aperture value Fno is 1.83.

Table 11 shows a basic parameter table of the imaging lens group of embodiment 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

9.0996E-02

-1.4059E-03

-6.2128E-02

1.3908E-01

-1.6601E-01

1.1602E-01

-4.7907E-02

1.0400E-02

-8.6937E-04

S2

7.8435E-02

2.0091E-01

-6.9460E-01

1.6573E+00

-2.5966E+00

2.6469E+00

-1.6793E+00

5.8949E-01

-8.5801E-02

S3

-1.2588E-01

4.4088E-01

-1.7206E+00

4.5063E+00

-7.5986E+00

8.0288E+00

-5.0149E+00

1.6077E+00

-1.7258E-01

S4

-1.3496E-01

-1.5106E-01

1.2047E+00

-4.6734E+00

1.1024E+01

-1.6066E+01

1.4240E+01

-7.1005E+00

1.5641E+00

S5

-1.1470E-01

2.2261E-01

-1.8976E+00

7.7937E+00

-2.0080E+01

3.2515E+01

-3.1955E+01

1.7455E+01

-4.0725E+00

S6

-8.5209E-02

1.2194E-01

-1.2390E+00

4.3774E+00

-9.7672E+00

1.3740E+01

-1.1629E+01

5.4032E+00

-1.0596E+00

S7

1.0947E-01

-3.8189E-01

6.6017E-01

-4.5011E-01

-1.5331E+00

5.6670E+00

-7.3517E+00

4.2745E+00

-9.3649E-01

S8

2.3092E-01

-1.0936E+00

1.7077E+00

-1.2813E+00

-1.4967E-01

1.6019E+00

-1.6926E+00

7.6562E-01

-1.2971E-01

S9

3.2775E-01

-1.0175E+00

1.7436E+00

-2.3682E+00

2.3886E+00

-1.6484E+00

7.2878E-01

-1.8617E-01

2.0846E-02

S10

1.4123E-01

7.4017E-02

-4.8740E-01

6.0144E-01

-4.0809E-01

1.7350E-01

-4.3399E-02

5.2015E-03

-1.5433E-04

S11

6.7350E-02

-2.1382E-01

2.1729E-01

-1.9642E-01

1.2689E-01

-5.2373E-02

1.3024E-02

-1.7695E-03

1.0067E-04

S12

-1.1188E-02

-3.2558E-02

-3.4232E-02

4.9445E-02

-2.7541E-02

8.4562E-03

-1.4537E-03

1.2533E-04

-3.8340E-06

S13

-5.6083E-01

2.9348E-01

-1.4902E-01

7.2701E-02

-2.4835E-02

5.3206E-03

-6.8511E-04

4.8633E-05

-1.4651E-06

S14

-6.8627E-01

5.3563E-01

-3.3808E-01

1.4342E-01

-3.8671E-02

6.5407E-03

-6.7246E-04

3.8416E-05

-9.3563E-07

TABLE 12

Fig. 12A shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 6, which represents the deviation of the convergent focus 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 image pickup lens group of embodiment 6. Fig. 12C shows a distortion curve of the image capturing lens group of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 6, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the imaging lens assembly according to embodiment 6 can achieve good imaging quality.

In summary, examples 1 to 6 each satisfy the relationship shown in table 13.

Conditions/examples	1	2	3	4	5	6
							TTL/ImgH×f	4.20	4.54	3.62	5.39	4.57	5.20
f5/f	1.47	1.56	2.81	1.69	1.42	1.31
							R11/R12	0.99	0.94	0.77	1.10	1.03	1.05
f7/R10	3.93	2.77	3.04	2.57	5.40	2.94
							CT2/T23	1.49	1.55	1.63	1.10	2.73	1.22
f/R3	1.88	1.90	0.86	1.68	1.73	1.98
							ΣAT/TD	0.33	0.35	0.33	0.32	0.40	0.418
(SAG21+SAG22)/(SAG21-SAG22)	1.95	1.79	1.995	1.28	1.15	1.52
							(DT61+DT62)/(DT61-DT62)	-13.00	-12.43	-13.80	-7.95	-10.78	-16.56
f7/f4	2.30	1.48	0.85	1.51	3.03	1.42

Watch 13

The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (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 above-described image-taking lens group.

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 the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. 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 imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having an optical power;

a second lens with focal power, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;

a diaphragm;

a third lens having a positive refractive power, an object-side surface of which is convex;

a fourth lens having a negative refractive power, an object-side surface of which is concave;

the image side surface of the fifth lens is a convex surface;

the image side surface of the sixth lens is a concave surface, and at least one of the object side surface and the image side surface of the sixth lens is provided with an inflection point;

the optical lens comprises a seventh lens with negative focal power, wherein the object side surface of the seventh lens is a convex surface, the image side surface of the seventh lens is a concave surface, and at least one of the object side surface and the image side surface of the seventh lens is provided with an inflection point;

the distance TTL from the object side surface of the first lens to the imaging surface of the shooting lens group on the optical axis, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the shooting lens group and the total effective focal length f of the shooting lens group meet the following requirements: TTL/ImgH multiplied by f is more than 3.00mm and less than 6.00 mm; and

the effective focal length f5 of the fifth lens and the total effective focal length f of the shooting lens group satisfy: f5/f is more than 1.00 and less than 3.00.

2. The imaging lens group of claim 1, wherein the radius of curvature R11 of the object-side surface of the sixth lens element and the radius of curvature R12 of the image-side surface of the sixth lens element satisfy: 0.50 < R11/R12 < 1.50.

3. The imaging lens group of claim 1, wherein an effective focal length f7 of the seventh lens and a radius of curvature R10 of an image side surface of the fifth lens satisfy: 2.50 < f7/R10 < 5.50.

4. The imaging lens group of claim 1, wherein a center thickness CT2 of the second lens on the optical axis and a separation distance T23 of the second lens and the third lens on the optical axis satisfy: 1.00 < CT2/T23 < 3.00.

5. The imaging lens group of claim 1, wherein the total effective focal length f of the imaging lens group and the radius of curvature R3 of the object side surface of the second lens satisfy: f/R3 is more than 0.50 and less than 2.00.

6. The imaging lens group according to claim 1, wherein a sum Σ AT of a distance TD on the optical axis from an object side surface of the first lens to an image side surface of the seventh lens and a separation distance on the optical axis from any two adjacent lenses having power of the first lens to the seventh lens satisfies: sigma AT/TD < 0.42.

7. The image-capturing lens group according to claim 1, wherein a distance SAG21 on the optical axis from an intersection point of an object-side surface of the second lens and the optical axis to an effective radius vertex of the object-side surface of the second lens to a distance SAG22 on the optical axis from an intersection point of an 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 satisfies: 1.00 < (SAG21+ SAG22)/(SAG21-SAG22) < 2.00.

8. The imaging lens group of claim 1, wherein the maximum effective radius DT61 of the object side surface of the sixth lens and the maximum effective radius DT62 of the image side surface of the sixth lens satisfy: -20.00 < (DT61+ DT62)/(DT61-DT62) < -7.00.

9. The imaging lens group of claim 3, wherein the effective focal length f7 of the seventh lens and the effective focal length f4 of the fourth lens satisfy: 0.50 < f7/f4 < 3.50.

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

a first lens having an optical power;

a diaphragm;

the image side surface of the fifth lens is a convex surface;

an effective focal length f7 of the seventh lens and an effective focal length f4 of the fourth lens satisfy: 0.50 < f7/f4 < 3.50.

11. The imaging lens group of claim 10, wherein the effective focal length f5 of the fifth lens and the total effective focal length f of the imaging lens group satisfy: f5/f is more than 1.00 and less than 3.00.

12. The imaging lens group of claim 10, wherein the radius of curvature R11 of the object-side surface of the sixth lens element and the radius of curvature R12 of the image-side surface of the sixth lens element satisfy: 0.50 < R11/R12 < 1.50.

13. The imaging lens group of claim 10, wherein the effective focal length f7 of the seventh lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 2.50 < f7/R10 < 5.50.

14. The imaging lens group of claim 10, wherein a center thickness CT2 of the second lens on the optical axis and a separation distance T23 of the second lens and the third lens on the optical axis satisfy: 1.00 < CT2/T23 < 3.00.

15. The imaging lens group of claim 10, wherein the total effective focal length f of the imaging lens group and the radius of curvature R3 of the object side surface of the second lens satisfy: f/R3 is more than 0.50 and less than 2.00.

16. The imaging lens group according to claim 10, wherein a sum Σ AT of a distance TD on the optical axis from an object side surface of the first lens to an image side surface of the seventh lens and a separation distance on the optical axis from any two adjacent lenses having power of the first lens to the seventh lens satisfies: sigma AT/TD < 0.42.

17. The image capturing lens group according to claim 10, wherein a distance SAG21 on the optical axis from an intersection point of an object side surface of the second lens and the optical axis to an effective radius vertex of the object side surface of the second lens to a distance SAG22 on the optical axis from an intersection point of an 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 satisfies: 1.00 < (SAG21+ SAG22)/(SAG21-SAG22) < 2.00.

18. The imaging lens group according to any one of claims 10 to 17, wherein a maximum effective radius DT61 of an object side surface of the sixth lens and a maximum effective radius DT62 of an image side surface of the sixth lens satisfy: -20.00 < (DT61+ DT62)/(DT61-DT62) < -7.00.