CN113484977A

CN113484977A - Optical imaging system

Info

Publication number: CN113484977A
Application number: CN202011337003.6A
Authority: CN
Inventors: 王彬清; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-10-08
Anticipated expiration: 2040-06-01
Also published as: CN111458845B; CN111458845A; CN113484977B

Abstract

The application discloses an optical imaging system, which comprises in order from an object side to an image side along an optical axis: a first lens having an optical power; a second lens having a positive optical power; a third lens having a negative optical power; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having a negative optical power; a seventh lens having positive optical power; an eighth lens having optical power; and a ninth lens having a negative optical power. The entrance pupil diameter EPD of the optical imaging system and the center thickness CT2 of the second lens satisfy: 3.5< EPD/CT2< 6.0.

Description

Optical imaging system

Divisional application statement

The present application is a divisional application of the chinese patent application entitled "optical imaging system" filed 6/1/2020, application No. 202010485774.3.

Technical Field

The application relates to an optical imaging system, in particular to an optical imaging system consisting of nine lenses.

Background

With the popularization of electronic products such as mobile phones and tablet computers, people tend to have higher and higher requirements on portability, lightness and thinness of the electronic products; meanwhile, with the development of scientific technology, semiconductor process technology is continuously advanced, and high-quality imaging lenses gradually become the mainstream trend of the market. In order to meet higher imaging quality and bring more imaging experience for users, more lenses are needed to be realized, and lenses with multiple lenses become mainstream products in the high-end market field.

Therefore, the invention provides an optical imaging system which is applicable to portable electronic products, has a large image plane, is ultrathin and has good imaging quality

Disclosure of Invention

An aspect of the present application provides an optical imaging system that may include, in order from an object side to an image side along an optical axis, a first lens having optical power; a second lens having an optical power; a third lens having a negative optical power; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having a negative optical power; a seventh lens having positive optical power; an eighth lens having optical power; and a ninth lens having a negative optical power.

In one embodiment, the effective focal length f of the optical imaging system and the maximum half field angle Semi-FOV of the optical imaging lens may satisfy: f TAN (Semi-FOV) is not less than 6.0 mm.

In one embodiment, the entrance pupil diameter EPD of the optical imaging system and the center thickness CT2 of the second lens may satisfy: 3.5< EPD/CT2< 6.0.

In one embodiment, the combined focal length f45 of the fourth and fifth lenses and the combined focal length f12 of the first and second lenses may satisfy: 1.2< f45/f12< 3.0.

In one embodiment, the effective focal length f of the optical imaging system, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens may satisfy: f/f1+ f/f2 is more than or equal to 0.7 and less than or equal to 1.0.

In one embodiment, the effective focal length f3 of the third lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens may satisfy: f7/| f3-f6| ≧ 1.0.

In one embodiment, the effective focal length f of the optical imaging system and the effective focal length f6 of the sixth lens may satisfy: -3.5< f6/f < -1.0.

In one embodiment, the effective focal length f of the optical imaging system and the effective focal length f9 of the ninth lens may satisfy: -2.1< f/f9< 0.

In one embodiment, the effective focal length f of the optical imaging system and the effective focal length f1 of the first lens may satisfy: 0< f/f1< 0.9.

In one embodiment, the effective focal length f of the optical imaging system, 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: 2.5< f/R11+ f/R12 is less than or equal to-1.0.

In one embodiment, the effective focal length f of the optical imaging system and the central thickness CT2 of the second lens may satisfy: f/CT2 is less than or equal to 15.

In one embodiment, the central thickness CT3 of the third lens, the central thickness CT4 of the fourth lens, and the central thickness CT5 of the fifth lens may satisfy: 2.5< (CT4+ CT5)/CT3< 6.0.

In one embodiment, the central thickness CT7 of the seventh lens, the central thickness CT8 of the eighth lens, and the central thickness CT9 of the ninth lens may satisfy: 0.6mm < (CT7+ CT8+ CT9)/3<1.1 mm.

In one embodiment, the effective focal length f of the optical imaging system and the entrance pupil diameter EPD of the optical imaging system may satisfy: f/EPD is less than or equal to 2.0.

In one embodiment, the on-axis distance TTL from the object-side surface of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface may satisfy: TTL/ImgH is less than or equal to 1.6.

The optical imaging lens provided by the application adopts a plurality of lenses, such as the first lens to the ninth lens, and can effectively balance all levels of aberration of the system by reasonably controlling the relationship between the image height and the total optical length of the optical imaging lens and reasonably distributing the focal power, so that the system has better imaging capability; meanwhile, the system has the characteristic of ultra-thinness, and is beneficial to the miniaturization of the system; in addition, the optical system has the characteristic of high pixel, and can effectively improve the resolution of the system.

Drawings

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

fig. 1 shows a schematic configuration diagram of an optical imaging system 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 optical imaging system of embodiment 1;

fig. 3 shows a schematic configuration diagram of an optical imaging system 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 chromatic aberration of magnification curve, respectively, of the optical imaging system of embodiment 2;

fig. 5 shows a schematic configuration diagram of an optical imaging system 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 chromatic aberration of magnification curve, respectively, of the optical imaging system of embodiment 3;

fig. 7 shows a schematic configuration diagram of an optical imaging system 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 optical imaging system of embodiment 4;

fig. 9 shows a schematic configuration diagram of an optical imaging system 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 optical imaging system of embodiment 5;

fig. 11 shows a schematic configuration diagram of an optical imaging system 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 optical imaging system of embodiment 6;

fig. 13 is a schematic structural view showing an optical imaging system 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 optical imaging system of embodiment 7;

fig. 15 shows a schematic configuration diagram of an optical imaging system 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 optical imaging system of embodiment 8.

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.

An optical imaging system according to an exemplary embodiment of the present application may include nine lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The nine lenses are arranged in order from the object side to the image side along the optical axis. In the first to ninth lenses, each of adjacent two lenses may have an air space 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 power or a negative power; the fifth lens may have a positive power or a negative power; the sixth lens may have a negative optical power; the seventh lens may have a positive optical power; the eighth lens may have a positive power or a negative power; and the ninth lens may have a negative optical power. Through the reasonable distribution of focal power of the lens, all levels of aberration of the system can be effectively balanced, so that the system has better imaging capability.

In an exemplary embodiment, the object-side surface of the first lens may be convex and the image-side surface may be concave.

In an exemplary embodiment, the object-side surface of the third lens element may be convex and the image-side surface may be concave.

In an exemplary embodiment, the object side surface of the fourth lens may be convex.

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

In an exemplary embodiment, an image side surface of the ninth lens may be concave.

In an exemplary embodiment, the effective focal length f of the optical imaging system and the maximum half field angle Semi-FOV of the optical imaging lens may satisfy: f TAN (Semi-FOV) is not less than 6.0 mm. For example f TAN (Semi-FOV) ≧ 6.08 mm. Through the effective focal length and the angle of view of rationally setting up optical imaging system, the size of compression system can be effectively for light deflection angle is little, guarantees that imaging system has great image plane, can acquire more image information volume at the shooting in-process, and the formation of image detail ability can show more outstanding.

In an exemplary embodiment, the entrance pupil diameter EPD of the optical imaging system and the center thickness CT2 of the second lens may satisfy: 3.5< EPD/CT2< 6.0. For example: EPD/CT2 is more than or equal to 3.75 and less than or equal to 5.77. The imaging system adopts a diaphragm preposed structure, the diameter of the entrance pupil of the system and the center thickness of the second lens are reasonably controlled, the light flux and the relative illumination of the lens can be ensured, and the imaging effect in a dark environment is enhanced.

In an exemplary embodiment, a combined focal length f45 of the fourth lens and the fifth lens and a combined focal length f12 of the first lens and the second lens may satisfy: 1.2< f45/f12< 3.0. For example, 1.40. ltoreq. f45/f 12. ltoreq.2.80. The first lens, the second lens and the combined focal length of the fourth lens and the fifth lens are reasonably distributed, so that the sensitivity of the first two lenses can be reduced, the too tight tolerance requirement is avoided, and the astigmatism, the coma aberration and the like of a system can be better and complementarily eliminated, so that the whole imaging quality is improved, and the better resolving power is obtained.

In an exemplary embodiment, the effective focal length f of the optical imaging system, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens may satisfy: f/f1+ f/f2 is more than or equal to 0.7 and less than or equal to 1.0. For example, 0.72. ltoreq. f/f1+ f/f 2. ltoreq.0.92. The effective focal lengths of the first lens and the second lens are reasonably distributed, so that the system keeps ultrathin, the focal power of the system is prevented from being excessively concentrated, and the system aberration can be better corrected by matching with the subsequent lens.

In an exemplary embodiment, the effective focal length f3 of the third lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens may satisfy: f7/| f3-f6| ≧ 1.0. For example, f7/| f3-f6| ≧ 1.05. The effective focal lengths of the third lens, the sixth lens and the seventh lens are reasonably distributed, so that the focal power of the system can be more reasonably distributed without being excessively concentrated on the seventh lens, and the imaging quality of the system is improved and the sensitivity of the system is reduced.

In an exemplary embodiment, the effective focal length f of the optical imaging system and the effective focal length f6 of the sixth lens may satisfy: -3.5< f6/f < -1.0. For example, -3.42. ltoreq. f 6/f. ltoreq-1.35. The effective focal length of the sixth lens is reasonably distributed, so that on one hand, spherical aberration and astigmatism of the whole system can be better eliminated, on the other hand, the light trend is reasonably controlled, and the problem of overhigh sensitivity caused by over-steep light is avoided.

In an exemplary embodiment, the effective focal length f of the optical imaging system and the effective focal length f9 of the ninth lens may satisfy: -2.1< f/f9< 0. For example, -2.04. ltoreq. f/f 9. ltoreq.0.12. The effective focal length of the ninth lens is reasonably distributed, so that the edge field image height is favorably improved, and the requirements of high pixels and large image planes of the system are met.

In an exemplary embodiment, the effective focal length f of the optical imaging system and the effective focal length f1 of the first lens may satisfy: 0< f/f1< 0.9. For example, 0.03. ltoreq. f/f 1. ltoreq.0.82. The effective focal length of the first lens is reasonably distributed, which is beneficial to improving chromatic aberration, reducing the total length of the system and increasing the back focal length of the system.

In an exemplary embodiment, the effective focal length f of the optical imaging system, 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: 2.5< f/R11+ f/R12 is less than or equal to-1.0. For example, -2.39. ltoreq. f/R11+ f/R12. ltoreq.1.05. And the curvature radius between the sixth lens object images is reasonably distributed, so that the aberration of an optical system can be converged, and the integral imaging quality can be improved.

In an exemplary embodiment, the effective focal length f of the optical imaging system and the center thickness CT2 of the second lens may satisfy: f/CT2 is less than or equal to 15. For example, f/CT2 ≦ 11.17. The thickness of the second lens is reasonably set, so that light can be better converged to obtain a larger image surface, and the second lens is prevented from being too thick to cause too concentrated focal power, so that the aberration correction of the whole system is not facilitated.

In an exemplary embodiment, the central thickness CT3 of the third lens, the central thickness CT4 of the fourth lens, and the central thickness CT5 of the fifth lens may satisfy: 2.5< (CT4+ CT5)/CT3< 6.0. For example, 2.76 ≦ (CT4+ CT5)/CT3 ≦ 5.70. The central thickness of the third, fourth and fifth lenses is reasonably distributed, so that the forming characteristic of the lens is favorably ensured, the optical deflection degree is reduced, the sensitivity is reduced, and on the other hand, the overall length of the optical system can be reduced, and the ultrathin characteristic is realized.

In an exemplary embodiment, the central thickness CT7 of the seventh lens, the central thickness CT8 of the eighth lens, and the central thickness CT9 of the ninth lens may satisfy: 0.6mm < (CT7+ CT8+ CT9)/3<1.1 mm. For example, 0.69mm ≦ (CT7+ CT8+ CT9)/3 ≦ 1.06 mm. The central thicknesses of the seventh, eighth and ninth lenses are reasonably distributed, so that on one hand, the manufacturability of the lenses is ensured, and the problems that the lenses are formed and assembled unstably by too thin strips or the internal stress is too large due to too thick lenses and the like are avoided; on the other hand, ghost image risks caused by the back three lenses can be reduced.

In an exemplary embodiment, the effective focal length f of the optical imaging system and the entrance pupil diameter EPD of the optical imaging system may satisfy: f/EPD is less than or equal to 2.0. For example, f/EPD ≦ 1.97. The diameter of the entrance pupil is reasonably controlled, the light flux of the system is increased, more image information is acquired, and meanwhile, the high relative illumination and the resolution are achieved, so that the lens still has good imaging capability in a dark environment.

In an exemplary embodiment, the on-axis distance TTL from the object-side surface of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface may satisfy: TTL/ImgH is less than or equal to 1.6. For example, TTL/ImgH ≦ 1.58. The ultra-thin characteristic of the system can be realized by controlling the ratio of the total optical length to the half-image height of the system in a certain range.

In an exemplary embodiment, the optical imaging lens may further include a diaphragm. The diaphragm may be disposed at an appropriate position as required. For example, a diaphragm may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.

The application provides an optical imaging lens with characteristics of large image plane, large aperture, ultra-thin and the like. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, nine lenses as described above. 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 an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, i.e., at least one of the object-side surface of the first lens to the image-side surface of the ninth 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, the seventh lens, the eighth lens, and the ninth lens is an aspherical mirror surface. Optionally, each of the object-side surface and the image-side surface of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens is an aspheric mirror surface.

The present application also provides an imaging device whose electron sensing 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 optical imaging lens described above.

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

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

Example 1

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

As shown in fig. 1, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex 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 positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a convex image-side surface S16. The ninth lens element E9 has negative power, and has a convex object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In this embodiment, the total effective focal length f of the optical imaging lens is 8.07mm, and the maximum field angle FOV of the optical imaging lens is 85.3 °.

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

TABLE 1

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the ninth lens E9 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 S18 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.4082E-03

8.5542E-04

-5.0427E-04

1.8012E-04

-4.0168E-05

4.0658E-06

-1.6716E-07

-8.9297E-10

1.6750E-12

S2

-4.0252E-03

-1.5603E-03

6.5570E-04

-2.5920E-04

6.4015E-05

-8.0805E-06

4.1458E-07

-9.2572E-11

5.8838E-13

S3

-7.0993E-03

-9.6482E-04

3.1507E-06

-9.6995E-06

1.4354E-05

-2.9703E-06

1.8461E-07

2.3815E-10

3.4135E-11

S4

-7.1628E-03

1.1367E-04

-7.7191E-05

7.2722E-06

-1.9388E-06

-1.5907E-07

1.2692E-08

-1.7127E-09

8.9247E-12

S5

-4.8447E-03

7.2986E-04

-1.4828E-04

1.7299E-06

4.7296E-07

3.6158E-09

-1.5594E-09

-3.0552E-10

-1.1279E-11

S6

-1.0513E-03

3.1134E-04

-1.3000E-04

6.8761E-06

-1.5622E-07

7.2013E-08

-4.1977E-09

-2.3762E-11

-9.3331E-12

S7

-2.5051E-03

-5.1381E-04

-4.7298E-05

5.8054E-05

-1.4279E-05

1.3917E-06

-4.0894E-08

1.3036E-10

-4.1686E-11

S8

-1.5512E-03

-5.1418E-05

7.8409E-06

5.5091E-07

6.2240E-08

1.2205E-08

-1.7457E-10

1.7656E-10

1.7369E-11

S9

1.0914E-03

-2.4346E-06

-7.2388E-06

-1.3599E-07

-1.2619E-09

6.0752E-09

-2.1440E-10

2.6099E-11

9.8036E-12

S10

-4.3024E-03

6.2358E-06

-3.5672E-05

3.8340E-06

1.3097E-06

-2.8744E-07

1.7464E-08

-6.1951E-11

2.2998E-12

S11

-2.0915E-02

7.3066E-03

-1.5294E-03

2.0017E-04

-1.5115E-05

6.0638E-07

-1.0001E-08

-2.8227E-11

-4.7930E-12

S12

-2.3293E-02

6.3827E-03

-1.0469E-03

1.1072E-04

-6.5911E-06

2.0266E-07

-2.2732E-09

1.8946E-11

4.6422E-12

S13

9.6589E-04

-2.0758E-04

-1.1393E-04

1.0920E-05

-6.7917E-07

1.9166E-08

-8.7205E-10

6.1439E-12

5.4488E-12

S14

1.0141E-02

-2.5644E-03

2.5495E-04

-1.9692E-05

9.2498E-07

-1.8581E-08

5.6970E-10

-1.0787E-11

-2.5187E-12

S15

-3.2269E-03

-6.8908E-05

-3.9845E-05

9.9028E-07

2.7630E-08

-1.6391E-09

1.3471E-10

4.6655E-12

4.4017E-13

S16

4.0672E-05

-2.9803E-05

-7.6320E-05

5.1481E-06

-1.4970E-07

2.6388E-09

2.4640E-11

1.8164E-12

1.9281E-13

S17

-2.2423E-02

1.0998E-03

2.7023E-06

-4.7684E-07

-5.0806E-09

-1.4938E-09

-9.6586E-11

2.0463E-11

-1.0440E-12

S18

-1.1249E-02

7.7929E-04

-3.5090E-05

1.0703E-06

-2.3802E-08

4.1117E-10

-3.6919E-12

-1.1425E-13

2.7262E-15

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

Example 2

An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 3, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a 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 positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a convex object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In this embodiment, the total effective focal length f of the optical imaging lens is 7.88mm, and the maximum field angle FOV of the optical imaging lens is 84.0 °.

Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 3

In embodiment 2, both the object-side surface and the image-side surface of any one of the first lens E1 through the ninth lens E9 are aspheric. Table 4 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S18 used in example 2₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆，A₁₈And A₂₀。

TABLE 4

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

Example 3

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

As shown in fig. 5, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a 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 negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a convex image-side surface S16. The ninth lens element E9 has negative power, and has a convex object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In this embodiment, the total effective focal length f of the optical imaging lens is 6.60mm, and the maximum field angle FOV of the optical imaging lens is 85.3 °.

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 5

In embodiment 3, both the object-side surface and the image-side surface of any one of the first lens E1 through the ninth lens E9 are aspheric. Table 6 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S18 used in example 3₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆，A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.2355E-03

4.6562E-04

-4.4552E-04

1.5152E-04

-3.1797E-05

3.6524E-06

-2.9576E-07

1.0482E-09

2.9540E-10

S2

-3.9175E-03

-1.3801E-03

5.3589E-04

-2.2009E-04

5.3132E-05

-6.8407E-06

3.3765E-07

-1.7682E-10

-8.6996E-11

S3

-5.9967E-03

-7.6966E-04

1.7080E-05

-1.0313E-05

1.2170E-05

-2.5640E-06

1.3235E-07

-3.9135E-10

-2.4795E-11

S4

1.8300E-04

-4.0474E-06

-5.6358E-05

7.2004E-06

-1.4056E-06

-1.6460E-07

6.2330E-09

-1.6916E-09

-2.0092E-11

S5

-3.4041E-03

5.3366E-04

-1.4129E-04

2.9265E-07

3.9754E-07

2.1221E-08

1.8396E-09

6.4404E-11

-2.5607E-11

S6

-1.8232E-03

2.6945E-04

-1.0240E-04

5.4679E-06

-3.9087E-08

3.2507E-08

-1.3651E-09

6.1791E-11

9.1391E-12

S7

-1.5999E-03

-2.6296E-04

-3.8610E-05

4.7901E-05

-1.1829E-05

1.1653E-06

-3.1941E-08

-1.5187E-10

-6.5762E-11

S8

-9.0527E-04

-1.7023E-04

7.0426E-06

1.4254E-06

6.5236E-08

1.2141E-09

9.0613E-11

1.0593E-10

3.0009E-11

S9

-3.2429E-04

3.3970E-05

-1.1170E-05

-9.7704E-07

-1.1204E-08

5.3609E-09

9.9162E-10

4.8700E-11

3.3148E-12

S10

-3.2887E-03

-1.8312E-04

-4.0105E-05

3.7939E-06

1.0346E-06

-2.3105E-07

1.3839E-08

-3.7319E-11

-5.7205E-12

S11

-1.7509E-02

6.1088E-03

-1.2765E-03

1.6642E-04

-1.2624E-05

5.0265E-07

-8.6259E-09

-7.6879E-11

-1.4617E-11

S12

-1.9039E-02

5.2727E-03

-8.7405E-04

9.2034E-05

-5.4987E-06

1.6619E-07

-2.3880E-09

-2.9255E-11

-3.1393E-12

S13

-1.7857E-03

4.9616E-05

-8.8681E-05

8.7349E-06

-5.2680E-07

2.2513E-08

-3.3324E-10

-4.2482E-12

-2.3104E-13

S14

9.3977E-03

-2.1512E-03

2.2302E-04

-1.5751E-05

7.7481E-07

-1.4935E-08

3.2227E-10

-2.7161E-11

-7.8974E-12

S15

-2.6368E-03

-2.6778E-04

-4.8551E-05

5.2295E-07

5.5917E-09

-1.0550E-09

1.7399E-10

4.3513E-11

5.8671E-12

S16

-1.2907E-03

-6.2254E-05

-6.7483E-05

4.2037E-06

-1.0908E-07

4.8082E-09

2.2446E-10

2.4034E-11

1.6597E-12

S17

-2.0729E-02

6.9529E-04

1.0665E-06

2.5975E-08

4.8262E-08

6.8962E-10

-7.0339E-10

6.4755E-12

1.6892E-12

S18

-8.3580E-03

5.7329E-04

-2.8344E-05

8.7074E-07

-2.1636E-08

3.2791E-10

2.5716E-12

2.3192E-14

-5.3639E-15

TABLE 6

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

Example 4

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

As shown in fig. 8, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a convex object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In this embodiment, the total effective focal length f of the optical imaging lens is 8.50mm, and the maximum field angle FOV of the optical imaging lens is 86.4 °.

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 7

In embodiment 4, both the object-side surface and the image-side surface of any one of the first lens E1 to the ninth lens E9 are aspheric. Table 8 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S18 used in example 4₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆，A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.3724E-04

4.9511E-04

-4.1914E-04

1.5384E-04

-3.2665E-05

3.5147E-06

-1.5074E-07

0.0000E+00

S2

-2.4106E-03

-1.3240E-03

5.4991E-04

-2.2213E-04

5.3407E-05

-6.7210E-06

3.5769E-07

0.0000E+00

S3

-5.8235E-03

-4.6822E-04

-1.0570E-06

-1.1559E-05

1.2498E-05

-2.4654E-06

1.5992E-07

0.0000E+00

S4

-3.1573E-03

1.5825E-04

-3.4815E-05

7.6606E-06

-1.3335E-06

-1.3342E-07

1.6465E-08

0.0000E+00

S5

-2.8918E-03

6.8178E-04

-1.3278E-04

5.3642E-07

4.1897E-07

2.1276E-08

9.2104E-10

0.0000E+00

S6

-4.7412E-04

3.4220E-04

-9.6197E-05

6.1589E-06

3.3088E-08

3.7788E-08

-1.9076E-09

0.0000E+00

S7

-1.6416E-03

-5.2815E-04

-4.6484E-05

4.7237E-05

-1.1984E-05

1.1462E-06

-3.3038E-08

0.0000E+00

S8

-6.6688E-04

-5.7408E-05

7.6853E-07

4.0358E-07

-1.4669E-09

-2.0358E-09

-3.9041E-10

0.0000E+00

S9

-4.1924E-04

-8.3858E-06

-1.5603E-06

-9.0652E-08

1.7439E-08

3.2618E-09

4.6732E-10

0.0000E+00

S10

-1.5348E-03

-1.4742E-04

-4.5344E-05

3.3850E-06

1.0189E-06

-2.3079E-07

1.4137E-08

0.0000E+00

S11

-1.7966E-02

6.1357E-03

-1.2735E-03

1.6660E-04

-1.2626E-05

5.0421E-07

-8.2840E-09

0.0000E+00

S12

-1.9244E-02

5.1989E-03

-8.7721E-04

9.2209E-05

-5.4834E-06

1.6881E-07

-2.1116E-09

0.0000E+00

S13

-2.2585E-03

2.6493E-04

-8.3897E-05

8.3692E-06

-5.5641E-07

2.1493E-08

-3.2999E-10

0.0000E+00

S14

1.1475E-02

-2.0957E-03

2.2002E-04

-1.6139E-05

7.2894E-07

-1.8088E-08

1.8833E-10

0.0000E+00

S15

-3.5190E-03

3.0761E-05

-2.4624E-05

9.9599E-07

1.1297E-08

-1.1253E-09

1.4343E-11

0.0000E+00

S16

1.3431E-04

2.2275E-04

-6.2065E-05

4.2744E-06

-1.3115E-07

1.9125E-09

-1.0820E-11

0.0000E+00

S17

-1.2040E-02

5.0742E-04

-2.3742E-06

-3.2264E-07

8.9168E-09

-9.4002E-11

3.4531E-13

0.0000E+00

S18

-7.0831E-03

4.8658E-04

-2.6657E-05

9.7127E-07

-2.1261E-08

2.5058E-10

-1.2255E-12

0.0000E+00

TABLE 8

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

Example 5

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

As shown in fig. 9, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex 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 positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a convex object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In this embodiment, the total effective focal length f of the optical imaging lens is 7.61mm, and the maximum field angle FOV of the optical imaging lens is 85.3 °.

Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 9

In embodiment 5, both the object-side surface and the image-side surface of any one of the first lens E1 through the ninth lens E9 are aspheric. Table 10 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S18 used in example 5₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆，A₁₈And A₂₀。

Watch 10

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

Example 6

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

As shown in fig. 11, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave 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 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 negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a convex object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In this embodiment, the total effective focal length f of the optical imaging lens is 7.83mm, and the maximum field angle FOV of the optical imaging lens is 85.3 °.

Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 11

In embodiment 6, both the object-side surface and the image-side surface of any one of the first lens E1 to the ninth lens E9 are aspheric. Table 12 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S18 used in example 6₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆，A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-5.9625E-04

4.1002E-04

-5.8187E-04

1.7807E-04

-3.8082E-05

4.1275E-06

-4.8856E-07

-3.0470E-09

-8.5620E-10

S2

-5.0010E-03

-1.8348E-03

5.7573E-04

-2.7391E-04

6.2539E-05

-8.3243E-06

4.0547E-07

2.2679E-10

8.6948E-11

S3

-7.5229E-03

-1.0651E-03

1.7120E-05

-1.5088E-05

1.4200E-05

-3.0367E-06

2.0236E-07

4.1681E-11

-1.6073E-11

S4

-6.4432E-03

-1.2168E-04

-9.0239E-05

4.3179E-06

-2.0318E-06

-1.7868E-07

1.6827E-08

-2.2465E-09

9.5975E-12

S5

-4.1657E-03

4.6847E-04

-1.7172E-04

1.2350E-06

4.1302E-07

-1.1092E-08

-2.8780E-09

3.8829E-10

3.5175E-10

S6

-2.7067E-03

3.6973E-04

-1.2851E-04

5.7789E-06

-5.4758E-09

5.9189E-08

-5.1268E-11

-6.1027E-12

-6.3829E-11

S7

-2.4027E-03

-2.6368E-04

-2.6016E-05

6.0388E-05

-1.3849E-05

1.4248E-06

-3.7012E-08

-2.4275E-10

-1.1102E-10

S8

3.9792E-04

-7.1349E-05

1.3779E-05

1.6878E-06

1.3820E-07

2.1275E-08

4.3128E-09

8.4684E-10

1.4319E-10

S9

-1.1678E-04

-5.3299E-05

-1.6288E-05

-1.3851E-06

-2.4971E-07

-5.9556E-08

-1.2147E-08

-2.5621E-09

-5.2789E-10

S10

-6.8188E-03

8.3433E-05

-3.7308E-05

3.0550E-06

9.6529E-07

-3.1092E-07

1.3283E-08

-2.4189E-10

2.2700E-11

S11

-2.1425E-02

7.0459E-03

-1.5463E-03

1.9896E-04

-1.5300E-05

5.7813E-07

-1.4186E-08

-6.6285E-10

-1.1129E-10

S12

-2.6773E-02

6.3461E-03

-1.0567E-03

1.0876E-04

-6.7529E-06

1.8366E-07

-6.2374E-09

-7.6561E-10

-1.3326E-10

S13

-2.2146E-03

-1.6734E-04

-1.2486E-04

1.0548E-05

-5.2371E-07

2.4597E-08

-1.5202E-09

-1.1630E-10

8.0257E-12

S14

1.2186E-02

-2.6099E-03

2.5382E-04

-2.0087E-05

8.8609E-07

-1.7904E-08

6.6445E-10

1.0509E-11

-3.0339E-12

S15

-9.3465E-04

5.6806E-05

-4.7055E-05

4.4982E-07

-1.2664E-08

-3.4631E-11

4.7080E-11

8.0882E-12

5.7933E-13

S16

7.4070E-04

-1.6197E-04

-7.0046E-05

5.6593E-06

-1.4169E-07

3.0879E-09

-3.8404E-11

1.3303E-12

8.2482E-15

S17

-2.7341E-02

1.1633E-03

8.3113E-06

2.4293E-08

3.6398E-08

1.9446E-09

-8.3198E-10

1.5582E-11

7.5810E-13

S18

-1.2011E-02

8.5013E-04

-3.7567E-05

1.0657E-06

-2.4249E-08

3.7009E-10

5.8309E-13

-1.3857E-14

-2.5321E-15

TABLE 12

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

Example 7

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

As shown in fig. 13, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a 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 negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a convex image-side surface S16. The ninth lens element E9 has negative power, and has a concave object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In this embodiment, the total effective focal length f of the optical imaging lens is 6.85mm, and the maximum field angle FOV of the optical imaging lens is 85.3 °.

Table 13 shows a basic parameter table of the optical imaging lens of embodiment 7, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

Watch 13

In embodiment 7, both the object-side surface and the image-side surface of any one of the first lens E1 through the ninth lens E9 are aspheric. Table 14 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S18 used in example 7₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆，A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.0828E-03

6.2941E-04

-5.2629E-04

1.4990E-04

-3.0911E-05

3.8770E-06

-3.1264E-07

3.7904E-10

7.1277E-11

S2

-3.4237E-03

-1.8020E-03

4.8482E-04

-2.1115E-04

5.5554E-05

-6.5607E-06

3.0058E-07

4.2037E-11

4.1470E-12

S3

-6.7042E-03

-9.6664E-04

3.2285E-05

-1.5517E-05

1.1034E-05

-2.5089E-06

2.0923E-07

7.0406E-12

-9.5409E-12

S4

-2.9134E-03

-3.7073E-04

-7.6568E-05

5.9093E-06

-1.2508E-06

-1.5231E-07

1.7270E-08

-1.0751E-09

-3.5481E-12

S5

-4.4246E-03

3.9648E-04

-1.4417E-04

2.3378E-06

6.7015E-07

4.6091E-08

4.1259E-09

-6.4036E-11

-3.0501E-11

S6

-2.0908E-03

2.5455E-04

-1.0905E-04

4.5914E-06

-1.1079E-07

4.4648E-08

-7.4986E-10

1.5812E-10

9.3053E-13

S7

-1.6309E-03

-1.2835E-04

-2.8991E-05

4.8744E-05

-1.1820E-05

1.1556E-06

-3.3312E-08

-1.9384E-10

-3.8267E-11

S8

-1.0107E-03

-1.3832E-04

9.9579E-06

1.0920E-06

2.0654E-08

-2.5770E-09

-7.6442E-10

3.0408E-11

1.2369E-11

S9

-1.5834E-03

-3.8218E-05

-1.4317E-05

-5.1897E-07

4.3996E-08

2.2423E-08

1.1613E-09

1.2315E-10

-1.1103E-11

S10

-5.0162E-03

1.0569E-04

-1.5888E-05

4.9932E-06

1.0934E-06

-2.2949E-07

1.3562E-08

-1.8138E-10

-1.7368E-11

S11

-1.8169E-02

5.8875E-03

-1.2848E-03

1.6647E-04

-1.2648E-05

4.9168E-07

-7.8391E-09

-6.3429E-11

6.6963E-12

S12

-2.0639E-02

5.2614E-03

-8.8790E-04

9.0457E-05

-5.5828E-06

1.6968E-07

-6.2601E-10

1.6601E-10

2.3627E-11

S13

-1.3884E-03

-2.7304E-04

-1.0434E-04

9.1106E-06

-4.8258E-07

2.4250E-08

-2.1117E-10

-5.8494E-11

-2.8977E-12

S14

8.0926E-03

-2.2311E-03

1.9638E-04

-1.6530E-05

8.4523E-07

-7.3770E-09

8.6975E-10

-2.0261E-11

-9.3273E-12

S15

-2.4314E-03

-2.4596E-04

-3.3292E-05

1.7071E-06

1.3254E-08

5.0034E-09

1.7066E-10

1.2762E-11

-5.2486E-12

S16

2.1677E-04

-5.4175E-04

-5.1145E-05

6.3399E-06

-1.0043E-07

9.0714E-10

-3.4409E-10

-5.4628E-12

1.3249E-12

S17

-2.1995E-02

1.2118E-03

-2.4628E-05

-1.4337E-06

5.5387E-08

9.3043E-09

-2.4597E-10

1.4161E-11

-2.1070E-12

S18

-1.0771E-02

8.2153E-04

-3.4074E-05

8.8402E-07

-2.0130E-08

3.2288E-10

6.4738E-14

8.3113E-15

-2.1279E-15

TABLE 14

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

Example 8

An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.

As shown in fig. 15, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex 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 negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has positive power, and has a concave object-side surface S15 and a convex image-side surface S16. The ninth lens element E9 has negative power, and has a convex object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In this embodiment, the total effective focal length f of the optical imaging lens is 7.54mm, and the maximum field angle FOV of the optical imaging lens is 85.3 °.

Table 15 shows a basic parameter table of the optical imaging lens of embodiment 8, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

Watch 15

In embodiment 8, both the object-side surface and the image-side surface of any one of the first lens E1 to the ninth lens E9 are aspheric. Table 16 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S18 used in example 8₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆，A₁₈And A₂₀。

TABLE 16

Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of the convergent focal points 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 optical imaging lens of embodiment 8. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 8, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens according to embodiment 8 can achieve good imaging quality.

In summary, examples 1 to 8 each satisfy the relationship shown in table 17.

Conditions/examples	1	2	3	4	5	6	7	8
									f*tan(Semi-FOV)	7.43	7.09	6.08	7.98	7.02	7.21	6.31	6.95
EPD/CT2	5.19	4.06	4.89	5.27	5.08	5.77	3.75	4.93
									f45/f12	1.66	2.80	1.79	1.78	1.78	2.32	1.40	1.86
f7/\|f3-f6\|	1.05	7.67	2.99	1.32	1.30	2.85	1.96	1.92
									f/f1+f/f2	0.72	0.86	0.82	0.92	0.90	0.91	0.86	0.85
f6/f	-2.77	-2.36	-3.03	-1.61	-1.63	-2.83	-1.35	-3.42
									f/f9	-1.44	-0.12	-0.90	-0.76	-1.30	-1.12	-2.04	-1.41
f/f1	0.14	0.05	0.25	0.31	0.15	0.82	0.09	0.03
									f/R11+f/R12	-2.39	-1.15	-1.47	-1.06	-1.05	-1.11	-1.63	-1.68
(CT4+CT5)/CT3	4.81	2.76	4.29	2.85	2.86	5.70	3.11	3.43
									(CT7+CT8+CT9)/3	0.95	1.06	0.69	1.02	0.99	0.96	0.84	0.77
f/CT2	10.21	7.92	9.58	10.18	9.90	11.17	7.25	9.21
									f/EPD	1.97	1.95	1.96	1.93	1.95	1.94	1.94	1.87
TTL/ImgH	1.51	1.55	1.56	1.47	1.57	1.53	1.53	1.58

TABLE 17

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. An optical imaging system, 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 a positive optical power;

a third lens having a negative optical power;

a fourth lens having an optical power;

a fifth lens having optical power;

a sixth lens having a negative optical power;

a seventh lens having positive optical power;

an eighth lens having optical power; and

a ninth lens having a negative optical power,

wherein an entrance pupil diameter EPD of the optical imaging system and a center thickness CT2 of the second lens satisfy:

3.5<EPD/CT2<6.0。

2. the optical imaging system of claim 1, wherein the effective focal length f of the optical imaging system and the maximum half field angle Semi-FOV of the optical imaging lens satisfy:

f*TAN(Semi-FOV)≥6.0mm。

3. the optical imaging system of claim 1, wherein a combined focal length f45 of the fourth and fifth lenses and a combined focal length f12 of the first and second lenses satisfy:

1.2<f45/f12<3.0。

4. the optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system, an effective focal length f1 of the first lens, and an effective focal length f2 of the second lens satisfy:

0.7≤f/f1+f/f2<1.0。

5. the optical imaging system of claim 1, wherein an effective focal length f3 of the third lens, an effective focal length f6 of the sixth lens, and an effective focal length f7 of the seventh lens satisfy:

f7/|f3-f6|≥1.0。

6. the optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system and an effective focal length f6 of the sixth lens satisfy:

-3.5<f6/f<-1.0。

7. the optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system and an effective focal length f9 of the ninth lens satisfy:

-2.1<f/f9<0。

8. the optical imaging system of claim 1, wherein the effective focal length f of the optical imaging system and the effective focal length f1 of the first lens satisfy:

0<f/f1<0.9。

9. the optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system, a radius of curvature R11 of the sixth lens object-side surface, and a radius of curvature R12 of the sixth lens image-side surface satisfy:

-2.5<f/R11+f/R12≤-1.0。

10. the optical imaging system of claim 1, wherein an effective focal length f of the optical imaging system and a center thickness CT2 of the second lens satisfy:

f/CT2≤15。