CN111538135A

CN111538135A - Image pickup lens assembly

Info

Publication number: CN111538135A
Application number: CN202010522501.1A
Authority: CN
Inventors: 黄林; 计云兵; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-08-14

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 having an optical power; a third lens having a negative optical power; a fourth lens having a positive optical power; a fifth lens having a positive optical power; a sixth lens having optical power; and a seventh lens having a negative optical power; the total effective focal length f of the image pickup lens group and half of the maximum field angle Semi-FOV of the image pickup lens group satisfy: f/tan of 25.00mm²(Semi‑FOV)＜40.00mm。

Description

Image pickup lens assembly

Technical Field

The present application relates to the field of optical elements, and in particular, to a photographing lens assembly.

Background

With the continuous development of science and technology, the optical imaging module plays an increasingly important role in the work and life of people. Such as mobile phone and computer camera module related to entertainment and life; safety and production related vehicle-mounted and security camera modules, wherein the long-focus camera module occupies a place among a plurality of imaging modules due to the advantage of long-distance camera shooting.

Although the common short-focus camera module can clearly image when the scenery is shot at a short distance, the scenery cannot be clearly imaged on the detector when the scenery is shot at a long distance. If the method of enlarging the shot to make the scene look clear is adopted, the shot will be more noisy and smeared. Compare in the short burnt module of making a video recording, long burnt module of making a video recording can realize long-distance clear formation of image with its natural advantage to still can keep the picture clear under the circumstances with the object magnification one time.

Disclosure of Invention

The present application provides a photographing 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 having an optical power; a third lens having a negative optical power; a fourth lens having a positive optical power; a fifth lens having a positive optical power; a sixth lens having optical power; and a seventh lens having a negative optical power; the total effective focal length f of the image pickup lens group and half of the maximum field angle Semi-FOV of the image pickup lens group satisfy: f/tan of 25.00mm²(Semi-FOV)＜40.00mm。

In one embodiment, the object-side surface of the first lens element to the image-side surface of the seventh lens element has at least one aspherical mirror surface.

In one embodiment, a first lens having power and a second lens having power may constitute a first lens group; the third lens with negative focal power, the fourth lens with positive focal power and the fifth lens with positive focal power can form a second lens group; the sixth lens having a power and the seventh lens having a negative power may constitute the third lens group.

In one embodiment, a combined focal length f56 of the fifth lens element and the sixth lens element and a distance BFL on the optical axis from the image-side surface of the seventh lens element to the imaging surface of the imaging lens group satisfy: f56/BFL is more than 6.00 and less than 11.00.

In one embodiment, the effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens may satisfy: 1.00 < f3/f7 < 4.50.

In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: 1.00 < f5/f4 < 3.50.

In one embodiment, the combined focal length f34 of the third and fourth lenses and the total effective focal length f of the image capturing lens group satisfy: f34/f is more than 1.00 and less than 3.00.

In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 3.00 < (R5+ R6)/(R5-R6) < 6.00.

In one embodiment, the combined focal length f12 of the first and second lenses and the radius of curvature R11 of the object side of the sixth lens may satisfy: 1.00 < f12/R11 < 7.00.

In one embodiment, the distance T23 between the second lens and the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 8.00 < T23/CT2 < 14.00.

In one embodiment, the maximum effective radius DT71 of the object-side surface of the seventh lens and the maximum effective radius DT72 of the image-side surface of the seventh lens may satisfy: 13.00 < (DT71+ DT72)/(DT72-DT71) < 17.00.

In one embodiment, a distance SAG31 on the optical axis from 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 and a distance SAG32 on the optical axis from the intersection point of the image-side surface of the third lens and the optical axis to the effective radius vertex of the image-side surface of the third lens may satisfy: 2.00 < (SAG31+ SAG32)/(SAG32-SAG31) < 4.00.

In one embodiment, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens may satisfy: 6.00 < ET5/ET4 < 10.00.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 3.00 < CT5/CT1 < 13.00.

In another aspect, the present application provides a photographing 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 having an optical power; a third lens having a negative optical power; a fourth lens having a positive optical power; a fifth lens having a positive optical power; a sixth lens having optical power; and a seventh lens having a negative optical power. The separation distance T23 between the second lens and the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis can satisfy: 8.00 < T23/CT2 < 14.00.

The optical imaging system has the advantages that the seven lenses are adopted, the focal power, the surface type and the center thickness of each lens are reasonably distributed, the distance between the lenses on the axis is equal, and the optical imaging system has at least one beneficial effect of long focus, high definition, high imaging quality 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 taking lens group of embodiment 6;

fig. 13 is a schematic view showing the structure of a photographing lens group according to embodiment 7 of the present application;

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

fig. 15 is a schematic view showing the structure of a photographing lens group according to embodiment 8 of the present application;

fig. 16A to 16D 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 8;

fig. 17 is a schematic view showing the structure of a photographing lens group according to embodiment 9 of the present application; and

fig. 18A to 18D 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 9.

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 capturing lens group according to an exemplary embodiment of the present application may include seven lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, respectively. 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 may have a positive power or a negative power; the second lens may have a positive or negative optical power; the third lens may have a negative optical power; the fourth lens may have a positive optical power; the fifth lens may have a positive optical power; the sixth lens may have a positive optical power or a negative optical power; and the seventh lens may have a negative optical power.

In an exemplary embodiment, the first lens and the second lens may constitute a first lens group; the third lens, the fourth lens and the fifth lens can form a second lens group; the sixth lens and the seventh lens may constitute a third lens group.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: f/tan of 25.00mm²(Semi-FOV) < 40.00mm, where f is the total effective focal length of the image pickup lens group, and Semi-FOV is half of the maximum field angle of the image pickup lens group. More specifically, f and Semi-FOV further satisfy: f/tan of 28.00mm & lt²(Semi-FOV) < 40.00 mm. Satisfy the requirement that f/tan is more than 25.00mm²The (Semi-FOV) is less than 40.00mm, so that the high resolving power can still be ensured during long-distance shooting, and the shooting field range can be effectively controlled.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 6.00 < f56/BFL < 11.00, wherein f56 is the combined focal length of the fifth lens and the sixth lens, and BFL is the distance on the optical axis from the image side surface of the seventh lens to the imaging surface of the shooting lens group. More specifically, f56 and BFL may further satisfy: f56/BFL is more than 6.30 and less than 10.90. Satisfies f56/BFL < 6.00 < 11.00, can reasonably distribute the focal power of the camera lens group, controls the Back Focal Length (BFL) allowance of the camera lens group and ensures good imaging quality.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 1.00 < f3/f7 < 4.50, wherein f3 is the effective focal length of the third lens and f7 is the effective focal length of the seventh lens. More specifically, f3 and f7 may further satisfy: 1.20 < f3/f7 < 4.30. Satisfying 1.00 < f3/f7 < 4.50, being beneficial to balancing aberration of the camera lens group better and improving the resolution of the camera lens group.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 1.00 < f5/f4 < 3.50, wherein f4 is the effective focal length of the fourth lens and f5 is the effective focal length of the fifth lens. Satisfying 1.00 < f5/f4 < 3.50, being beneficial to balancing aberration of the camera lens group better and improving the resolution of the camera lens group.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 1.00 < f34/f < 3.00, wherein f34 is the combined focal length of the third lens and the fourth lens, and f is the total effective focal length of the image pickup lens group. More specifically, f34 and f further satisfy: f34/f is more than 1.30 and less than 2.60. Satisfying f34/f < 3.00 < 1.00, which is beneficial to correcting the axial chromatic aberration of the camera lens group and simultaneously improving the resolution of the camera lens group.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 3.00 < (R5+ R6)/(R5-R6) < 6.00, wherein R5 is the radius of curvature of the object-side surface of the third lens and R6 is the radius of curvature of the image-side surface of the third lens. More specifically, R5 and R6 may further satisfy: 3.40 < (R5+ R6)/(R5-R6) < 5.50. Satisfy 3.00 < (R5+ R6)/(R5-R6) < 6.00, can avoid the third lens too crooked, reduce the processing degree of difficulty, make the lens group of making a video recording possess better ability of balancing chromatic aberration and distortion simultaneously.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 1.00 < f12/R11 < 7.00, wherein f12 is the combined focal length of the first lens and the second lens, and R11 is the radius of curvature of the object side surface of the sixth lens. More specifically, f12 and R11 may further satisfy: 1.20 < f12/R11 < 6.80. The requirement that f12/R11 is more than 1.00 and less than 7.00 is met, the sixth lens can be prevented from being bent too much, the processing difficulty is reduced, and meanwhile, the camera lens group has better capability of balancing chromatic aberration and distortion.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 8.00 < T23/CT2 < 14.00, wherein T23 is the distance between the second lens and the third lens on the optical axis, and CT2 is the central thickness of the second lens on the optical axis. More specifically, T23 and CT2 further satisfy: 8.10 < T23/CT2 < 13.20. The requirements that T23/CT2 is more than 8.00 and less than 14.00 are met, the processing and assembling characteristics can be ensured, and the problems that front and rear lenses interfere in the assembling process due to too small space are avoided. Meanwhile, the light deflection is favorably slowed down, the curvature of field of the camera lens group is adjusted, the sensitivity is reduced, and the better imaging quality is obtained.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 13.00 < (DT71+ DT72)/(DT72-DT71) < 17.00, where DT71 is the maximum effective radius of the object side surface of the seventh lens and DT72 is the maximum effective radius of the image side surface of the seventh lens. More specifically, DT71 and DT72 further satisfy: 13.30 < (DT71+ DT72)/(DT72-DT71) < 16.50. Satisfies 13.00 < (DT71+ DT72)/(DT72-DT71) < 17.00, can prevent the aperture of the seventh lens from being overlarge, and ensures the miniaturization of the camera lens group.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 2.00 < (SAG31+ SAG32)/(SAG32-SAG31) < 4.00, wherein SAG31 is a distance on the optical axis from 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, and SAG32 is a distance on the optical axis from the intersection point of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens. More specifically, SAG31 and SAG32 further may satisfy: 2.70 < (SAG31+ SAG32)/(SAG32-SAG31) < 3.90. Satisfies the condition of 2.00 < (SAG31+ SAG32)/(SAG32-SAG31) < 4.00, can avoid the third lens from being bent too much, reduces the processing difficulty and simultaneously ensures that the assembly of the image pickup lens group has higher stability.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 6.00 < ET5/ET4 < 10.00, wherein ET4 is the edge thickness of the fourth lens and ET5 is the edge thickness of the fifth lens. More specifically, ET5 and ET4 further satisfy: 6.10 < ET5/ET4 < 9.80. The requirements that ET5/ET4 is more than 6.00 and less than 10.00 are met, the edges of the fourth lens and the fifth lens are prevented from being too thin, the processability of the fourth lens and the fifth lens is ensured, light deflection is relieved, the curvature of field of the shooting lens group is adjusted, the sensitivity is reduced, and further better imaging quality is obtained.

In an exemplary embodiment, the image pickup lens group according to the present application may satisfy: 3.00 < CT5/CT1 < 13.00, wherein CT1 is the central thickness of the first lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis. More specifically, CT5 and CT1 further satisfy: 3.40 < CT5/CT1 < 12.90. The requirements of 3.00 & lt CT5/CT1 & lt 13.00 are met, the processing and assembling characteristics can be guaranteed, the problems of front and rear lens interference and the like in the assembling process caused by too small space are avoided, meanwhile, the better aberration correction is facilitated, and the good imaging quality is guaranteed.

In an exemplary embodiment, a photographing lens group according to the present application further includes a stop disposed between the fourth lens and the fifth 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 present application provides a photographing lens assembly having characteristics of a long focus, a variable focus, a high resolution, and a high imaging quality. The image pickup lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above seven lenses. By reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the optical imaging lens is more beneficial to production and processing.

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 in imaging can be eliminated as much as possible, and the imaging quality is further improved. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, 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 third lens E3, a fourth lens E4, a stop STO, 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 power, and has a convex object-side surface S1 and a concave 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 negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave 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-taking lens group is 6.50mm, the total length TTL of the image-taking 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-taking lens group) is 15.33mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.67mm, the half Semi-FOV of the maximum angle of view of the image-taking lens group is 22.5 °, and the aperture value Fno of the image-taking lens group is 2.02.

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 circleThe cone 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

3.7897E-03

-6.3787E-03

2.1381E-03

-3.6121E04

3.3636E-05

-1.6575E-06

4.3755E-08

-1.3486E-09

4.8553E-11

S2

5.0437E-02

-4.4328E-02

2.0850E-02

-6.3017E-03

1.2800E-03

-1.7290E-04

1.4800E-05

-7.2199E-07

1.5205E-08

S3

4.0806E-02

-3.2765E-02

1.7109E-02

-5.7971E-03

1.2871E-03

-1.8543E-04

1.6653E-05

-8.4602E-07

1.8538E-08

S4

3.0693E-03

-3.2306E-03

2.5927E-03

-1.1839E-03

3.0920E-04

-4.8222E-05

4.4223E-06

-2.2046E-07

4.6221E-09

S5

6.5588E-03

-9.1658E-03

6.0941E-04

2.2132E-03

-1.6180E-03

5.9399E-04

-1.2956E-04

1.5811E-05

-8.0601E-07

S6

3.6099E-02

-1.9892E-02

-7.1198E-02

1.2368E-01

-9.7906E-02

4.4457E-02

-1.1798E-02

1.6971E-03

-1.0195E-04

S7

3.0349E-02

-8.5834E-03

-8.0045E-02

1.3264E-01

-1.0282E-01

4.5309E-02

-1.1559E-02

1.5868E-03

-9.0605E-05

S8

-6.7148E-02

7.5484E-02

-3.9112E-02

1.0715E-02

-1.0481E-03

-1.0762E-03

7.7406E-04

-2.0734E-04

1.9854E-05

S9

-5.1940E-02

7.7166E-02

-4.1943E-02

1.2410E-02

-3.2083E-03

1.1734E-03

-3.3463E-04

4.4778E-05

-1.7994E-06

S10

1.7496E-02

6.4964E-03

-1.5038E-02

3.3820E-02

-4.0140E-02

2.7596E-02

-1.1058E-02

2.4004E-03

-2.1850E-04

S11

4.6067E-03

3.4373E-03

1.1452E-02

-2.0214E-02

1.4781E-02

-5.8004E-03

1.2837E-03

-1.5172E-04

7.4566E-06

S12

-2.1189E-02

5.4761E-02

-5.6120E-02

3.4563E-02

-1.4647E-02

4.5774E-03

-9.5848E-04

1.1337E-04

-5.6163E-06

S13

-7.9394E-02

5.5859E-02

-6.0100E-02

4.1504E-02

-1.7083E-02

4.3785E-03

-6.6001E-04

4.8422E-05

-9.5479E-07

S14

-1.5431E-02

-1.3695E-02

1.3398E-02

-5.4565E-03

1.5919E-03

-3.8881E-04

7.2030E-05

-8.1444E-06

4.0065E-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 third lens E3, a fourth lens E4, a stop STO, 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 negative power, and has a concave object-side surface S1 and a concave 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 negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave 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 this example, the total effective focal length f of the image-taking lens group is 6.10mm, the total length TTL of the image-taking lens group is 15.59mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.67mm, the half Semi-FOV of the maximum field angle of the image-taking lens group is 24.3 °, and the aperture value Fno of the image-taking lens group is 2.20.

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 third lens E3, a fourth lens E4, a stop STO, 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 negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex 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 this example, the total effective focal length f of the image-taking lens group is 6.50mm, the total length TTL of the image-taking lens group is 15.06mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.67mm, the half Semi-FOV of the maximum field angle of the image-taking lens group is 22.1 °, and the aperture value Fno of the image-taking lens group is 2.42.

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

-9.2820E-03

2.6157E-03

-1.1998E-03

5.4724E-04

-1.4695E-04

2.3632E-05

-2.2803E-06

1.2214E-07

-2.7908E-09

S2

-3.0897E-02

2.9851E-02

-1.9502E-02

7.9449E-03

-2.0340E-03

3.3199E-04

-3.3683E-05

1.9391E-06

-4.8406E-08

S3

-2.0037E-02

2.6376E-02

-1.6958E-02

6.7425E-03

-1.7257E-03

2.8448E-04

-2.9407E-05

1.7433E-06

-4.5305E-08

S4

-2.7226E-03

5.9873E-03

-3.4956E-03

1.4356E-03

-4.1681E-04

7.8345E-05

-9.1666E-06

6.1297E-07

-1.7953E-08

S5

1.1714E-02

-1.5178E-02

9.5690E-03

-8.5851E-03

6.1959E-03

-2.6796E-03

6.6286E-04

-8.7507E-05

4.8223E-06

S6

-4.6519E-03

3.1330E-03

-1.8349E-02

1.6475E-02

-7.5670E-03

1.9945E-03

-2.5905E-04

1.7835E-06

2.3143E-06

S7

-2.5601E-02

2.5563E-02

-3.3742E-02

2.9474E-02

-1.5296E-02

4.5200E-03

-6.5875E-04

2.1406E-05

3.1488E-06

S8

-7.1020E-02

1.1324E-01

-1.1104E-01

7.8768E-02

-3.8679E-02

1.2043E-02

-2.1516E-03

1.8276E-04

-3.9809E-06

S9

-5.4990E-02

1.0853E-01

-1.0961E-01

7.9145E-02

-4.1240E-02

1.4546E-02

-3.2317E-03

4.0459E-04

-2.1699E-05

S10

1.5638E-02

4.5266E-03

-8.2638E-03

1.9143E-02

-2.4358E-02

1.8143E-02

-7.8873E-03

1.8513E-03

-1.8095E-04

S11

8.2983E-04

3.2081E-03

-1.6191E-04

-1.5929E-03

2.1128E-03

-1.3158E-03

4.2823E-04

-7.0520E-05

4.6518E-06

S12

-4.7458E-02

5.4514E-02

-4.8886E-02

3.7103E-02

-1.9238E-02

6.7504E-03

-1.5334E-03

1.9978E-04

-1.1163E-05

S13

-2.5860E-01

2.0868E-01

-1.3868E-01

8.3718E-02

-3.8968E-02

1.2525E-02

-2.5566E-03

2.9353E-04

-1.4282E-05

S14

-1.2087E-01

9.0110E-02

-4.4120E-02

1.7128E-02

-5.3721E-03

1.2597E-03

-1.9733E-04

1.7814E-05

-6.8847E-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 third lens E3, a fourth lens E4, a stop STO, 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 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 negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave 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 this example, the total effective focal length f of the image-taking lens group is 6.50mm, the total length TTL of the image-taking lens group is 15.38mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.67mm, the half Semi-FOV of the maximum field angle of the image-taking lens group is 23.0 °, and the aperture value Fno of the image-taking lens group is 2.42.

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

-1.2389E-02

9.3658E-04

1.0105E-03

-5.5629E-04

1.5084E-04

-2.4390E-05

2.3634E-06

-1.2645E-07

2.8690E-09

S2

5.9356E-02

-9.8847E-02

7.7661E-02

-3.5738E-02

1.0173E-02

-1.8075E-03

1.9486E-04

-1.1649E-05

2.9605E-07

S3

6.6140E-02

-9.2162E-02

7.0816E-02

-3.2461E-02

9.2151E-03

-1.6312E-03

1.7486E-04

-1.0373E-05

2.6110E-07

S4

1.0263E-02

-1.5543E-02

1.2628E-02

-6.0384E-03

1.7693E-03

-3.2108E-04

3.4997E-05

-2.0937E-06

5.2720E-08

S5

-1.0929E-03

1.8037E-02

-3.6834E-02

3.2142E-02

-1.6448E-02

5.2687E-03

-1.0452E-03

1.1774E-04

-5.7570E-06

S6

-5.1420E-02

1.9225E-01

-3.3465E-01

3.0829E-01

-1.7035E-01

5.8530E-02

-1.2279E-02

1.4415E-03

-7.2568E-05

S7

-5.9586E-02

1.8883E-01

-3.1570E-01

2.8730E-01

-1.5579E-01

5.1934E-02

-1.0449E-02

1.1642E-03

-5.5116E-05

S8

-4.5072E-02

1.6254E-02

4.5297E-02

-6.7135E-02

4.6915E-02

-1.9948E-02

5.2158E-03

-7.6624E-04

4.8150E-05

S9

-3.0317E-02

8.1988E-03

6.4224E-02

-9.3189E-02

6.6283E-02

-2.8453E-02

7.4624E-03

-1.1004E-03

6.9796E-05

S10

1.4630E-02

1.4198E-02

-3.5585E-02

6.2096E-02

-6.4290E-02

4.0542E-02

-1.5302E-02

3.1754E-03

-2.7845E-04

S11

5.2999E-03

-1.8661E-03

5.2982E-03

-4.4684E-03

1.6566E-03

4.2865E-05

-2.2553E-04

6.3256E-05

-5.6503E-06

S12

-1.0814E-02

9.8990E-03

-1.1080E-02

1.5200E-02

-1.4095E-02

7.6315E-03

-2.2810E-03

3.4951E-04

-2.1490E-05

S13

-1.5375E-01

1.0383E-01

-5.9552E-02

2.7938E-02

-1.3469E-02

6.2972E-03

-1.9302E-03

3.0847E-04

-1.9507E-05

S14

-9.7183E-02

7.1783E-02

-4.0397E-02

1.5602E-02

-3.8896E-03

6.6783E-04

-8.9295E-05

8.8721E-06

-4.3674E-07

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 third lens E3, a fourth lens E4, a stop STO, 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 negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave 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 this example, the total effective focal length f of the image-taking lens group is 6.00mm, the total length TTL of the image-taking lens group is 15.39mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.67mm, the half Semi-FOV of the maximum field angle of the image-taking lens group is 24.6 °, and the aperture value Fno of the image-taking lens group is 2.33.

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 third lens E3, a fourth lens E4, a stop STO, 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 negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave 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 this example, the total effective focal length f of the image-taking lens group is 6.10mm, the total length TTL of the image-taking lens group is 15.59mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.67mm, the half Semi-FOV of the maximum field angle of the image-taking lens group is 24.3 °, and the aperture value Fno of the image-taking lens group is 2.29.

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

-9.7102E-03

3.4372E-03

-9.1055E-04

2.1184E-04

-3.9286E-05

5.2296E-06

-4.5130E-07

2.2201E-08

-4.7110E-10

S2

-1.8435E-02

1.2325E-02

-5.6689E-03

1.7696E-03

-3.6557E-04

4.9842E-05

-4.3702E-06

2.2631E-07

-5.3128E-09

S3

-5.4494E-03

7.3890E-03

-3.7104E-03

1.0858E-03

-1.9909E-04

2.4299E-05

-2.1186E-06

1.2515E-07

-3.5870E-09

S4

2.5689E-03

6.8419E-04

-6.1626E-05

-1.4737E-04

7.6914E-05

-1.7330E-05

1.9581E-06

-1.0751E-07

2.2505E-09

S5

1.3518E-03

-4.0789E-03

-7.5128E-04

2.5195E-03

-1.8620E-03

7.6456E-04

-1.8536E-04

2.4602E-05

-1.3708E-06

S6

-7.7917E-03

-4.6709E-03

-1.0979E-02

2.3497E-02

-2.0699E-02

1.0173E-02

-2.8737E-03

4.3508E-04

-2.7332E-05

S7

-1.4010E-02

-2.1119E-03

-2.8524E-03

1.3302E-02

-1.4151E-02

7.5784E-03

-2.2477E-03

3.5270E-04

-2.2990E-05

S8

-6.5198E-02

8.7582E-02

-5.5008E-02

1.0561E-02

9.6824E-03

-8.4482E-03

2.9853E-03

-5.2213E-04

3.6881E-05

S9

-5.0870E-02

8.2590E-02

-4.8250E-02

-9.0303E-04

2.0779E-02

-1.4767E-02

5.1078E-03

-9.1260E-04

6.7242E-05

S10

1.1549E-02

-4.0298E-03

1.0436E-02

-1.1843E-02

7.7958E-03

-2.8463E-03

4.7163E-04

1.5191E-06

-7.1562E-06

S11

6.4562E-03

-3.8656E-03

6.2450E-03

-6.3073E-03

3.9403E-03

-1.4804E-03

3.2089E-04

-3.6099E-05

1.5618E-06

S12

4.8178E-03

1.5896E-03

-5.6264E-03

7.7364E-03

-6.4426E-03

3.1255E-03

-8.3893E-04

1.1532E-04

-6.3408E-06

S13

-1.5971E-01

1.1922E-01

-8.1709E-02

4.6837E-02

-2.2190E-02

7.9800E-03

-1.8588E-03

2.3779E-04

-1.2497E-05

S14

-8.7404E-02

6.7206E-02

-3.9706E-02

1.7223E-02

-5.3362E-03

1.1870E-03

-1.8030E-04

1.6327E-05

-6.4852E-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.

Example 7

A photographing lens group according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic configuration diagram of an image capturing lens group according to embodiment 7 of the present application.

As shown in fig. 13, 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 third lens E3, a fourth lens E4, a stop STO, 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 negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave 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 13 shows a basic parameter table of the image pickup lens group of embodiment 7, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.6306E-02

9.5054E-03

-3.4911E-03

8.8506E-04

-1.5215E-04

1.7416E-05

-1.2748E-06

5.3905E-08

-9.9465E-10

S2

-1.6775E-02

9.8145E-03

-3.9309E-03

1.2738E-03

-3.1369E-04

5.4199E-05

-6.0145E-06

3.7811E-07

-1.0124E-08

S3

1.8155E-03

8.4040E-04

-1.2956E-03

8.0030E-04

-2.7295E-04

5.4405E-05

-6.4619E-06

4.2810E-07

-1.2202E-08

S4

2.4312E-03

1.1748E-03

-1.5019E-03

8.0067E-04

-2.4669E-04

4.5333E-05

-5.0355E-06

3.1832E-07

-8.9071E-09

S5

4.5104E-03

-1.6408E-03

-1.0118E-02

1.2035E-02

-7.4594E-03

2.8115E-03

-6.4056E-04

8.1020E-05

-4.3631E-06

S6

-6.4594E-03

1.3661E-02

-4.2442E-02

4.7274E-02

-3.0989E-02

1.2803E-02

-3.2342E-03

4.5303E-04

-2.6846E-05

S7

-2.0524E-02

1.1927E-02

-1.4653E-02

1.3098E-02

-7.4944E-03

2.8777E-03

-7.0221E-04

9.6640E-05

-5.7765E-06

S8

-7.2246E-02

1.0591E-01

-7.9163E-02

2.7919E-02

3.0556E-03

-7.4473E-03

3.1271E-03

-5.9457E-04

4.4307E-05

S9

-5.5773E-02

1.0847E-01

-9.3202E-02

4.3480E-02

-7.2571E-03

-3.2273E-03

2.1015E-03

-4.6170E-04

3.7521E-05

S10

1.5119E-02

1.2462E-04

2.9852E-03

-3.2030E-03

1.8502E-03

-3.9820E-04

-1.1090E-04

7.0619E-05

-9.8668E-06

S11

3.9029E-03

-4.1074E-04

6.6254E-04

-3.2323E-04

-2.5104E-05

1.3490E-04

-7.0931E-05

1.5382E-05

-1.2400E-06

S12

-2.4945E-04

2.3164E-03

-6.8260E-04

-1.1537E-04

1.4937E-04

-2.9880E-05

3.1873E-06

-5.8905E-07

5.9693E-08

S13

-1.1391E-01

6.1726E-02

-2.7977E-02

9.1352E-03

-2.0373E-03

3.1678E-04

-2.2989E-05

-2.2591E-06

3.9817E-07

S14

-6.6493E-02

3.6527E-02

-1.5169E-02

4.2804E-03

-7.0603E-04

4.2322E-05

6.7158E-06

-1.4926E-06

8.6532E-08

TABLE 14

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

Example 8

A photographing lens group according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural view of a photographing lens group according to embodiment 8 of the present application.

As shown in fig. 15, 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 third lens E3, a fourth lens E4, a stop STO, 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 negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave object-side surface S11 and a convex 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 this example, the total effective focal length f of the image-taking lens group is 6.10mm, the total length TTL of the image-taking lens group is 15.59mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.67mm, the half Semi-FOV of the maximum field angle of the image-taking lens group is 24.2 °, and the aperture value Fno of the image-taking lens group is 2.30.

Table 15 shows a basic parameter table of the image pickup lens group of embodiment 8, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 shows high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 15

TABLE 16

Fig. 16A shows a on-axis chromatic aberration curve of the image-taking lens group of embodiment 8, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 8. Fig. 16C shows a distortion curve of the image capturing lens group of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 8, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 16A to 16D, the image capturing lens assembly according to embodiment 8 can achieve good image quality.

Example 9

A photographing lens group according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 shows a schematic configuration diagram of an image capturing lens group according to embodiment 9 of the present application.

As shown in fig. 17, 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 third lens E3, a fourth lens E4, a stop STO, 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 negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave 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 this example, the total effective focal length f of the image-taking lens group is 6.00mm, the total length TTL of the image-taking lens group is 15.39mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image-taking lens group is 2.67mm, the half Semi-FOV of the maximum field angle of the image-taking lens group is 24.5 °, and the aperture value Fno of the image-taking lens group is 2.37.

Table 17 shows a basic parameter table of the image pickup lens group of embodiment 9, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 18 shows high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 17

Watch 18

Fig. 18A shows a chromatic aberration curve on the axis of the image-taking lens group of embodiment 9, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 18B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 9. Fig. 18C shows a distortion curve of the image capturing lens group of embodiment 9, which represents distortion magnitude values corresponding to different image heights. Fig. 18D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 9, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 18A to 18D, the imaging lens assembly according to embodiment 9 can achieve good imaging quality.

In summary, examples 1 to 9 each satisfy the relationship shown in table 19.

Conditions/examples	1	2	3	4	5	6	7	8	9
										f/tan²(Semi-FOV)(mm)	37.69	29.90	39.21	36.12	28.68	30.01	28.62	30.07	28.75
f56/BFL	6.35	8.15	9.00	7.75	7.73	8.83	10.79	7.64	6.98
										f3/f7	4.21	2.51	1.28	1.57	1.48	1.62	1.36	1.52	1.33
f5/f4	1.10	3.41	1.35	1.46	1.45	2.31	1.35	1.56	1.37
										f34/f	2.31	1.34	2.35	2.37	2.50	1.61	2.56	2.23	2.57
(R5+R6)/(R5-R6)	5.42	3.50	4.57	4.11	3.47	3.53	3.45	3.54	3.53
										f12/R11	6.74	4.28	1.32	2.33	1.47	1.81	1.99	1.71	1.97
T23/CT2	8.18	13.10	11.33	11.17	9.57	9.81	10.70	9.82	8.30
										(DT71+DT72)/(DT72-DT71)	13.86	14.34	15.51	15.64	14.73	14.91	13.34	14.79	16.44
(SAG31+SAG32)/(SAG32-SAG31)	3.12	3.85	3.59	3.30	3.00	3.15	2.83	3.15	2.79
										ET5/ET4	6.42	6.19	8.77	7.13	8.94	9.72	7.44	7.79	7.50
CT5/CT1	3.46	5.47	7.56	6.74	9.73	8.06	12.80	9.54	8.50

Watch 19

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 having an optical power;

a third lens having a negative optical power;

a fourth lens having a positive optical power;

a fifth lens having a positive optical power;

a sixth lens having optical power; and

a seventh lens having a negative optical power;

the total effective focal length f of the image pickup lens group and half of the Semi-FOV of the maximum field angle of the image pickup lens group satisfy: f/tan of 25.00mm²(Semi-FOV)＜40.00mm。

2. The imaging lens group of claim 1, wherein a combined focal length f56 of the fifth lens and the sixth lens and a distance BFL on the optical axis from an image side surface of the seventh lens to an imaging surface of the imaging lens group satisfy: f56/BFL is more than 6.00 and less than 11.00.

3. The imaging lens group of claim 1, wherein the effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens satisfy: 1.00 < f3/f7 < 4.50.

4. The imaging lens group of claim 1, wherein the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: 1.00 < f5/f4 < 3.50.

5. The imaging lens group of claim 1, wherein a combined focal length f34 of the third and fourth lenses and a total effective focal length f of the imaging lens group satisfy: f34/f is more than 1.00 and less than 3.00.

6. The imaging lens group of claim 1, wherein the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens satisfy: 3.00 < (R5+ R6)/(R5-R6) < 6.00.

7. The image capturing lens group of claim 1, wherein a combined focal length f12 of the first and second lenses and a radius of curvature R11 of an object side surface of the sixth lens satisfy: 1.00 < f12/R11 < 7.00.

8. The imaging lens group of claim 1, wherein a separation distance T23 between the second lens and the third lens on the optical axis and a center thickness CT2 of the second lens on the optical axis satisfy: 8.00 < T23/CT2 < 14.00.

9. The imaging lens group of claim 1, wherein the maximum effective radius DT71 of the object side surface of the seventh lens and the maximum effective radius DT72 of the image side surface of the seventh lens satisfy: 13.00 < (DT71+ DT72)/(DT72-DT71) < 17.00.

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 second lens having an optical power;

a third lens having a negative optical power;

a fourth lens having a positive optical power;

a fifth lens having a positive optical power;

a sixth lens having optical power; and

a seventh lens having a negative optical power;

the second lens and the third lens are separated by a distance T23 on the optical axis and a center thickness CT2 of the second lens on the optical axis satisfy: 8.00 < T23/CT2 < 14.00.