CN112764204B

CN112764204B - Camera lens

Info

Publication number: CN112764204B
Application number: CN202110138655.5A
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: 2021-02-01
Filing date: 2021-02-01
Publication date: 2022-07-15
Anticipated expiration: 2041-02-01
Also published as: CN115047596A; CN112764204A

Abstract

The application discloses a camera lens, it includes along optical axis from the thing side to image side in order: a first lens having an optical power; a second lens having a positive optical power; a third lens having optical power; a fourth lens having a focal power; a fifth lens having optical power; a sixth lens having a negative refractive power; a seventh lens having optical power; an eighth lens having optical power; a ninth lens having a negative optical power; and a tenth lens having a power. The total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens meet the following requirements: f/EPD < 1.7.

Description

Camera lens

Technical Field

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

Background

With the continuous development of portable electronic products such as smart phones, people have also made higher demands on the performance of camera lenses of portable electronic products such as smart phones. Most of the camera lenses in the current market cannot meet the imaging requirements under the conditions of insufficient light (such as overcast and rainy days, dusk and the like), hand trembling and the like due to the limitations of the number of the lenses, the size of the aperture, the structure of the camera lenses and the like. The multi-piece camera lens provides more design freedom, and therefore the multi-piece camera lens provides more possibility for improving the performance of portable electronic products such as smart phones.

Disclosure of Invention

An aspect of the present disclosure provides an imaging lens, sequentially 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 focal power; a fourth lens having a focal power; a fifth lens having optical power; a sixth lens having a negative refractive power; a seventh lens having optical power; an eighth lens having optical power; a ninth lens having a negative optical power; and a tenth lens having a power. The total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens can satisfy: f/EPD < 1.7.

In one embodiment, at least one mirror surface of the object side surface of the first lens to the image side surface of the tenth lens is an aspherical mirror surface.

In one embodiment, the total effective focal length f of the image pickup lens and the effective focal length f1 of the first lens may satisfy: 1.5 < f1/f < 5.

In one embodiment, the central thickness CT2 of the second lens on the optical axis and the separation distance T23 of the second lens and the third lens on the optical axis may satisfy: 1 < (CT2+ T23)/(CT2-T23) < 1.5.

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 < (R5+ R6)/(R5-R6) < 5.

In one embodiment, the total effective focal length f of the image pickup lens and the effective focal length f3 of the third lens may satisfy: -2 < f3/f < -1.5.

In one embodiment, the central thickness CT3 of the third lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 1 < CT4/(CT3+ CT5) < 1.5.

In one embodiment, a central thickness CT5 of the fifth lens on the optical axis, a central thickness CT6 of the sixth lens on the optical axis, a distance T45 between the fourth lens and the fifth lens on the optical axis, and a distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 1 < (T45+ CT5)/(T56+ CT6) < 2.

In one embodiment, the effective focal length f7 of the seventh lens and the radius of curvature R14 of the image side surface of the seventh lens may satisfy: -3 < f7/R14 < -1.

In one embodiment, an effective focal length f8 of the eighth lens, a center thickness CT8 of the eighth lens on the optical axis, a separation distance T78 of the seventh lens and the eighth lens on the optical axis, and a separation distance T89 of the eighth lens and the ninth lens on the optical axis may satisfy: 5 < f8/(T78+ CT8+ T89) < 10.

In one embodiment, the total effective focal length f of the image pickup lens and the effective focal length f9 of the ninth lens may satisfy: -0.2 < f/f9 < 0.

In one embodiment, the effective focal length f10 of the tenth lens, the radius of curvature R19 of the object-side surface of the tenth lens, and the radius of curvature R20 of the image-side surface of the tenth lens may satisfy: 2 < (R19-R20)/f10 < 7.

In one embodiment, the optical distortion DIST corresponding to the maximum field angle of the image pickup lens may satisfy: the | DIST | < 3%.

In one embodiment, a distance TTL on an optical axis from an object side surface of the first lens to an imaging surface of the imaging lens and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the imaging lens may satisfy: TTL/ImgH is more than 1 and less than 1.6.

In one embodiment, the imaging lens further includes a diaphragm, and a distance SD on the optical axis from the diaphragm to the image side surface of the tenth lens and a distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the imaging lens may satisfy: SD/TTL is more than 0.75 and less than 0.9.

Another aspect of the present disclosure provides an imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens having optical power. The total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens can satisfy: f/EPD is less than 1.7; and the total effective focal length f of the image pickup lens and the effective focal length f3 of the third lens satisfy: -2 < f3/f < -1.5.

In one embodiment, the total effective focal length f of the image pickup lens and the effective focal length f1 of the first lens may satisfy: f1/f < 5 > is more than 1.5.

In one embodiment, the effective focal length f10 of the tenth lens, the radius of curvature of the object-side surface R19 of the tenth lens, and the radius of curvature of the image-side surface R20 of the tenth lens may satisfy: 2 < (R19-R20)/f10 < 7.

In one embodiment, the optical distortion DIST corresponding to the maximum field angle of the image pickup lens may satisfy: the | < DIST | < 3%.

In one embodiment, a distance TTL between an object side surface of the first lens and an imaging surface of the imaging lens on the optical axis and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the imaging lens may satisfy: TTL/ImgH is more than 1 and less than 1.6.

In one embodiment, the imaging lens further includes a stop, and a distance SD on the optical axis from the stop to an image side surface of the tenth lens and a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the imaging lens may satisfy: SD/TTL is more than 0.75 and less than 0.9.

In one embodiment, the second lens has a positive optical power; the sixth lens has negative focal power; and the ninth lens has a negative power.

This application provides one kind through reasonable distribution focal power and optimization optical parameter, has ultra-thin, big light ring, big image plane, good image quality etc. at least one beneficial effect's camera lens applicable in portable electronic product.

Drawings

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

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

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

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

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

fig. 5 shows a schematic configuration diagram of an imaging lens according to embodiment 3 of the present application;

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

fig. 7 is a schematic configuration diagram showing an imaging lens according to embodiment 4 of the present application;

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

fig. 9 is a schematic configuration diagram showing an imaging lens according to embodiment 5 of the present application;

fig. 10A to 10D show an axial chromatic aberration curve, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve of the imaging lens of embodiment 5, respectively;

fig. 11 is a schematic configuration diagram showing an imaging lens according to embodiment 6 of the present application;

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

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

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

Detailed Description

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

It should be noted that in this specification the expressions first, second, third etc. are only used 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 examples or illustrations.

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

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

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

An image pickup lens according to an exemplary embodiment of the present application may include ten lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens, respectively. The ten lenses are arranged in order from an object side to an image side along an optical axis. Any adjacent two lenses of the first lens to the tenth 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 optical power; the third lens may have a positive optical power or 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 positive or negative optical power; the eighth lens may have a positive power or a negative power; the ninth lens may have a negative power; and the tenth lens may have a positive power or a negative power.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: f/EPD < 1.7, wherein f is the total effective focal length of the camera lens, and EPD is the entrance pupil diameter of the camera lens. The f/EPD is less than 1.7, so that the light transmission quantity of the camera lens can be increased, the camera lens can acquire more image information, the camera lens has higher relative illumination and resolution, and the camera lens still has good imaging capability in a dark environment.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 1.5 < f1/f < 5, where f is the total effective focal length of the imaging lens and f1 is the effective focal length of the first lens. More specifically, f1 and f further satisfy: f1/f is more than 1.5 and less than 4.5. Satisfying 1.5 < f1/f < 5 is beneficial to slowing down the deflection of the light rays in the first lens and avoiding the over-high focal power of the first lens, thereby not only reducing the sensitivity of the first lens, but also reducing the aberration generated by the first lens.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 1 < (CT2+ T23)/(CT2-T23) < 1.5, wherein CT2 is the central thickness of the second lens on the optical axis, and T23 is the separation distance between the second lens and the third lens on the optical axis. More specifically, CT2 and T23 further satisfy: 1.1 < (CT2+ T23)/(CT2-T23) < 1.5. Satisfy 1 < (CT2+ T23)/(CT2-T23) < 1.5, both can guarantee the handling property of second lens and third lens, can guarantee the ultra-thin characteristic of camera lens again.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 3 < (R5+ R6)/(R5-R6) < 5, where 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: 3.8 < (R5+ R6)/(R5-R6) < 5. Satisfy 3 < (R5+ R6)/(R5-R6) < 5, both can avoid increasing the processing degree of difficulty because the field angle of third lens is too big, can reduce the sensitivity of third lens again, effectively balanced coma and the field curvature of camera lens.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: -2 < f3/f < -1.5, where f is the total effective focal length of the camera lens and f3 is the effective focal length of the third lens. More specifically, f3 and f further satisfy: -2 < f3/f < -1.6. Satisfying-2 < f3/f < -1.5, the lens has smaller spherical aberration, and the on-axis view field of the camera lens has good imaging quality.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 1 < CT4/(CT3+ CT5) < 1.5, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis. The requirements of 1 < CT4/(CT3+ CT5) < 1.5 are met, the molding characteristics of the third lens to the fifth lens are favorably ensured, the deflection degree of light rays in the third lens to the fifth lens is favorably reduced, the sensitivity of the lenses is reduced, the overall length of the camera lens is favorably reduced, and the ultra-thin characteristic of the lens is realized.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 1 < (T45+ CT5)/(T56+ CT6) < 2, wherein CT5 is a central thickness of the fifth lens on the optical axis, CT6 is a central thickness of the sixth lens on the optical axis, T45 is a separation distance of the fourth lens and the fifth lens on the optical axis, and T56 is a separation distance of the fifth lens and the sixth lens on the optical axis. More specifically, T45, CT5, T56, and CT6 may further satisfy: 1.1 < (T45+ CT5)/(T56+ CT6) < 1.8. Satisfy 1 < (T45+ CT5)/(T56+ CT6) < 2, both can guarantee the processing performance of fifth lens and sixth lens, can realize the ultra-thin characteristic of lens again.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: -3 < f7/R14 < -1, wherein f7 is the effective focal length of the seventh lens and R14 is the radius of curvature of the image side surface of the seventh lens. More specifically, f7 and R14 may further satisfy: -2.8 < f7/R14 < -1.8. Satisfying-3 < f7/R14 < -1, the curvature of field contribution of the image side surface of the seventh lens can be controlled within a reasonable range to balance the curvature of field generated by the front lens.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 5 < f8/(T78+ CT8+ T89) < 10, where f8 is an effective focal length of the eighth lens, CT8 is a center thickness of the eighth lens on the optical axis, T78 is a separation distance of the seventh lens and the eighth lens on the optical axis, and T89 is a separation distance of the eighth lens and the ninth lens on the optical axis. More specifically, f8, T78, CT8, and T89 may further satisfy: 5 < f8/(T78+ CT8+ T89) < 9.5. The requirements of 5 < f8/(T78+ CT8+ T89) < 10 are met, the assembly manufacturability of the seventh lens to the ninth lens can be ensured, and the ghost image risk brought by the seventh lens to the ninth lens can be reduced.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: -0.2 < f/f9 < 0, where f is the total effective focal length of the camera lens and f9 is the effective focal length of the ninth lens. More specifically, f and f9 further satisfy: -0.15 < f/f9 < 0. Satisfying-0.2 < f/f9 < 0, the spherical aberration contribution amount of the ninth lens can be controlled in a reasonable range, and the visual field on the lens axis can obtain good imaging quality.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 2 < (R19-R20)/f10 < 7, wherein f10 is the effective focal length of the tenth lens, R19 is the radius of curvature of the object-side surface of the tenth lens, and R20 is the radius of curvature of the image-side surface of the tenth lens. More specifically, R19, R20, and f10 may further satisfy: 2.7 < (R19-R20)/f10 < 6.2. The requirement of 2 < (R19-R20)/f10 < 7 is met, the astigmatism of the tenth lens can be effectively corrected, and the image quality of the marginal field of view of the lens can be further ensured.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: and | DIST | < 3%, wherein DIST is optical distortion corresponding to the maximum field angle of the camera lens. More specifically, the DIST may further satisfy: the | DIST | < 2.2%. The requirement that the absolute DIST is less than or equal to 3 percent is met, the small distortion characteristic is favorably realized, and the imaging quality is favorably improved.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: and 1 < TTL/Imgh < 1.6, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the camera lens on the optical axis, and Imgh is half of the length of the diagonal line of the effective pixel area on the imaging surface of the camera lens. More specifically, TTL and ImgH may further satisfy: TTL/ImgH is more than 1.4 and less than 1.6. The requirements that TTL/ImgH is more than 1 and less than 1.6 are met, and the ultrathin characteristic of the camera lens can be effectively ensured.

In an exemplary embodiment, an imaging lens according to the present application further includes a stop disposed between the object side and the first lens. The camera lens according to the application can satisfy: and 0.75 < SD/TTL < 0.9, wherein the SD is the distance on the optical axis from the diaphragm to the image side surface of the tenth lens, and the TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens. SD/TTL is more than 0.75 and less than 0.9, so that the lens can obtain enough luminous flux, higher illumination on the imaging surface of the lens is ensured, and the lens can keep good imaging quality at night or in an environment with weak light energy.

In an exemplary embodiment, the above-described image pickup lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image forming surface. The application provides a camera lens with characteristics of ultra-thin, large aperture, large image plane, high imaging quality and the like. The camera lens with the large aperture and the ultrathin characteristic has the advantages that on the premise of meeting a large image plane, the aperture is larger, the light inlet amount is larger, the shutter speed can be effectively increased, meanwhile, the background blurring effect is better, the ultrathin property of portable electronic products such as smart phones can be guaranteed on the premise that the optical performance is fully improved due to the ten-piece type ultrathin characteristic, and the camera lens is more suitable for the market trend of ultrathin portable electronic products such as field demands and smart phones. The imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, ten lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the axial distance between each lens and the like, the 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 camera lens is more favorable for 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 tenth 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 a better curvature radius characteristic, and has advantages of improving distortion aberration and improving astigmatism aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, and the imaging quality is further improved. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens is an aspheric mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses constituting the imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the claimed technical solution. For example, although ten lenses are exemplified in the embodiment, the imaging lens is not limited to including ten lenses. The camera lens may also include other numbers of lenses, if desired.

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

Example 1

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

As shown in fig. 1, the imaging lens includes, in order from an object side to an image side: the stop STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the ninth lens E9, the tenth lens E10, the filter E11, and the image plane S23.

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 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 convex object-side surface S11 and a concave 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 concave object-side surface S17 and a convex image-side surface S18. The tenth lens E10 has negative power, and has a concave object-side surface S19 and a concave image-side surface S20. Filter E11 has an object side S21 and an image side S22. Light from the object sequentially passes through the respective surfaces S1 to S22 and is finally imaged on the imaging surface S23.

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

TABLE 1

In this example, the total effective focal length f of the imaging lens is 6.97mm, and the maximum field angle FOV of the imaging lens is 81.6 °.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the tenth lens E10 are both aspheric, and the profile x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:

wherein x is a distance vector from the vertex of the aspheric surface when the aspheric surface is at a position having a height h along the optical axis directionHigh; 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 S20 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.5637E-03

2.2353E-03

-2.7603E-03

1.7216E-03

-6.6995E-04

1.6160E-04

-2.2773E-05

1.6806E-06

-4.9223E-08

S2

-1.3153E-02

1.3665E-02

-1.8315E-02

1.1167E-02

-3.6324E-03

6.4877E-04

-5.1442E-05

-6.3442E-07

2.5356E-07

S3

-5.4423E-03

1.8687E-02

-2.4415E-02

1.3121E-02

-3.5682E-03

4.2338E-04

1.6280E-05

-9.6368E-06

7.2880E-07

S4

4.4834E-02

-1.7261E-02

8.8347E-03

-7.5677E-03

5.0903E-03

-2.1426E-03

5.2457E-04

-6.8083E-05

3.6222E-06

S5

-1.0610E-02

-1.2858E-02

1.3368E-02

-7.2196E-03

2.9424E-03

-1.0112E-03

2.4418E-04

-3.3051E-05

1.8405E-06

S6

-3.5442E-02

4.3618E-03

-4.2964E-04

4.8658E-04

-3.2073E-04

5.7660E-05

4.3047E-06

-2.3942E-06

2.0224E-07

S7

4.0301E-02

-1.1262E-02

2.5364E-03

-8.5194E-04

6.1576E-04

-2.7001E-04

6.0413E-05

-6.5575E-06

2.6965E-07

S8

1.4053E-02

-7.0193E-03

8.2552E-04

7.6997E-04

-8.5395E-04

4.6000E-04

-1.2908E-04

1.8125E-05

-1.0185E-06

S9

-3.0464E-02

8.2230E-03

-3.4681E-03

2.5333E-03

-2.6082E-03

1.4790E-03

-4.2908E-04

6.2068E-05

-3.5708E-06

S10

-3.5022E-02

3.4704E-02

-4.2580E-03

-1.3084E-02

1.0940E-02

-4.3184E-03

9.6709E-04

-1.1902E-04

6.3392E-06

S11

-2.3494E-02

2.5790E-02

-4.7835E-03

-1.1573E-02

1.0940E-02

-4.6526E-03

1.0880E-03

-1.3563E-04

7.0798E-06

S12

-1.1806E-02

-2.5557E-04

1.4597E-03

-2.5591E-03

1.8599E-03

-6.9657E-04

1.4283E-04

-1.4945E-05

6.1155E-07

S13

-8.1790E-03

7.1329E-04

-2.3195E-04

-6.9240E-04

6.8602E-04

-3.5122E-04

1.0269E-04

-1.6352E-05

1.1116E-06

S14

-2.1824E-02

-1.4853E-04

2.0279E-03

-1.5529E-03

6.8622E-04

-1.9698E-04

3.5637E-05

-3.7162E-06

1.7150E-07

S15

-8.3220E-03

-1.8667E-03

1.0404E-03

-3.7466E-04

9.9800E-05

-1.7032E-05

1.7327E-06

-9.5659E-08

2.2018E-09

S16

6.4409E-03

-2.9964E-03

7.0050E-04

-1.3667E-04

2.5144E-05

-3.3135E-06

2.6183E-07

-1.1062E-08

1.9081E-10

S17

-2.2215E-03

-1.3271E-03

3.5427E-05

3.0590E-05

-4.3203E-06

3.7497E-07

-2.7828E-08

1.3373E-09

-2.6913E-11

S18

5.0855E-03

-2.4597E-03

9.0251E-04

-1.6881E-04

1.8484E-05

-1.2543E-06

5.1858E-08

-1.1933E-09

1.1697E-11

S19

-7.8358E-03

2.9466E-03

-3.7782E-05

-5.9531E-05

9.2329E-06

-6.9627E-07

2.9750E-08

-6.8859E-10

6.7156E-12

S20

-1.8177E-02

3.8918E-03

-6.7306E-04

7.8329E-05

-6.0848E-06

3.1217E-07

-1.0105E-08

1.8609E-10

-1.4817E-12

TABLE 2

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

Example 2

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

As shown in fig. 3, the image capturing lens system includes, in order from an object side to an image side: the stop STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the ninth lens E9, the tenth lens E10, the filter E11, and the image plane S23.

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 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 convex object-side surface S11 and a concave 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 concave object-side surface S17 and a convex image-side surface S18. The tenth lens E10 has negative power, and has a concave object-side surface S19 and a concave image-side surface S20. Filter E11 has an object side S21 and an image side S22. The light from the object passes through the respective surfaces S1 to S22 in order and is finally imaged on the imaging surface S23.

In the present example, the total effective focal length f of the imaging lens is 6.92mm, and the maximum field angle FOV of the imaging lens is 81.6 °.

Table 3 shows a basic parameter table of the 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 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

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.0620E-03

2.8746E-04

-1.2824E-03

1.1225E-03

-5.2173E-04

1.4409E-04

-2.3219E-05

1.9704E-06

-6.6717E-08

S2

-7.3752E-03

3.5917E-04

-8.1419E-03

8.2344E-03

-3.9578E-03

1.1260E-03

-1.9235E-04

1.8168E-05

-7.2730E-07

S3

1.1237E-03

3.1992E-03

-1.3492E-02

1.2052E-02

-5.9261E-03

1.8036E-03

-3.3605E-04

3.5192E-05

-1.5920E-06

S4

4.5787E-02

-2.1607E-02

1.1538E-02

-5.5077E-03

1.6379E-03

-3.4219E-04

6.6201E-05

-1.0025E-05

6.8264E-07

S5

-1.4903E-02

-8.2647E-03

1.1956E-02

-7.5342E-03

2.8725E-03

-7.6840E-04

1.5096E-04

-1.9289E-05

1.1343E-06

S6

-3.9115E-02

8.0541E-03

-1.1508E-03

5.0634E-04

-6.4329E-04

2.8394E-04

-5.6529E-05

4.8570E-06

-1.0003E-07

S7

3.8718E-02

-1.1947E-02

4.7841E-03

-8.2866E-04

-5.2918E-04

3.6240E-04

-9.2480E-05

1.1388E-05

-5.6910E-07

S8

1.3495E-02

-1.5757E-02

1.5319E-02

-1.1164E-02

5.3739E-03

-1.6107E-03

2.8931E-04

-2.8342E-05

1.1472E-06

S9

-2.5671E-02

-2.5660E-03

8.9210E-03

-7.7934E-03

3.4811E-03

-7.7070E-04

5.3781E-05

7.4359E-06

-1.0659E-06

S10

-3.2834E-02

4.2049E-02

-2.5013E-02

6.5418E-03

1.0783E-03

-1.4006E-03

4.6235E-04

-7.2829E-05

4.6849E-06

S11

-2.8423E-02

4.4334E-02

-3.4346E-02

1.3826E-02

-1.9634E-03

-6.6985E-04

3.5709E-04

-6.2325E-05

3.9646E-06

S12

-1.8048E-02

1.2309E-02

-1.2338E-02

7.6747E-03

-3.1878E-03

9.3608E-04

-1.9551E-04

2.6379E-05

-1.6597E-06

S13

-7.3962E-03

-1.3401E-04

1.7196E-03

-3.0580E-03

2.3910E-03

-1.1151E-03

3.1065E-04

-4.8126E-05

3.1860E-06

S14

-2.2922E-02

1.0673E-04

1.9836E-03

-1.6836E-03

8.1403E-04

-2.4980E-04

4.6905E-05

-4.9551E-06

2.2634E-07

S15

-5.9833E-03

-2.2463E-03

6.6322E-04

-1.3483E-04

3.7209E-05

-8.1368E-06

9.8776E-07

-5.9568E-08

1.3998E-09

S16

7.1250E-03

-3.2986E-03

5.1033E-04

-4.6251E-05

1.0734E-05

-2.2339E-06

2.2396E-07

-1.0531E-08

1.8715E-10

S17

-1.0359E-03

-2.5426E-03

3.4401E-04

-4.4484E-05

1.2060E-05

-1.7856E-06

1.2969E-07

-4.5989E-09

6.3821E-11

S18

3.7599E-03

-5.2375E-04

9.3592E-05

3.2696E-06

-3.1412E-06

4.1035E-07

-2.5181E-08

7.7368E-10

-9.5853E-12

S19

-1.2973E-02

6.4994E-03

-1.2565E-03

1.7843E-04

-1.9035E-05

1.3810E-06

-6.2319E-08

1.5637E-09

-1.6614E-11

S20

-1.7522E-02

3.4385E-03

-5.8621E-04

6.8736E-05

-5.4377E-06

2.8806E-07

-9.7332E-09

1.8781E-10

-1.5634E-12

TABLE 4

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

Example 3

An 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 configuration diagram of an imaging lens according to embodiment 3 of the present application.

As shown in fig. 5, the imaging lens includes, in order from an object side to an image side: the stop STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the ninth lens E9, the tenth lens E10, the filter E11, and the image plane S23.

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 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 convex object-side surface S11 and a concave 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 concave object-side surface S17 and a convex image-side surface S18. The tenth lens element E10 has negative power, and has a concave object-side surface S19 and a concave image-side surface S20. Filter E11 has an object side S21 and an image side S22. Light from the object sequentially passes through the respective surfaces S1 to S22 and is finally imaged on the imaging surface S23.

In this example, the total effective focal length f of the imaging lens is 6.80mm, and the maximum field angle FOV of the imaging lens is 81.6 °.

Table 5 shows a basic parameter table of the 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 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

TABLE 6

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

Example 4

An 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 configuration diagram of an imaging lens according to embodiment 4 of the present application.

As shown in fig. 7, the imaging lens includes, in order from an object side to an image side: the stop STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the ninth lens E9, the tenth lens E10, the filter E11, and the image plane S23.

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 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 convex object-side surface S11 and a concave 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 concave object-side surface S17 and a convex image-side surface S18. The tenth lens element E10 has negative power, and has a concave object-side surface S19 and a concave image-side surface S20. Filter E11 has an object side S21 and an image side S22. The light from the object passes through the respective surfaces S1 to S22 in order and is finally imaged on the imaging surface S23.

In this example, the total effective focal length f of the imaging lens is 6.92mm, and the maximum field angle FOV of the imaging lens is 81.6 °.

Table 7 shows a basic parameter table of the imaging lens of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are 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

TABLE 8

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

Example 5

An 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 configuration diagram of an imaging lens according to embodiment 5 of the present application.

As shown in fig. 9, the imaging lens includes, in order from an object side to an image side: the stop STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the ninth lens E9, the tenth lens E10, the filter E11, and the image plane S23.

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 convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has 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 concave object-side surface S17 and a convex image-side surface S18. The tenth lens element E10 has negative power, and has a concave object-side surface S19 and a concave image-side surface S20. Filter E11 has an object side S21 and an image side S22. Light from the object sequentially passes through the respective surfaces S1 to S22 and is finally imaged on the imaging surface S23.

In the present example, the total effective focal length f of the imaging lens is 6.83mm, and the maximum field angle FOV of the imaging lens is 81.6 °.

Table 9 shows a basic parameter table of the 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 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

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-9.7683E-04

-1.1663E-03

1.2883E-03

-1.1467E-03

6.4169E-04

-2.1757E-04

4.3004E-05

-4.4668E-06

1.8591E-07

S2

1.2319E-03

-1.0653E-02

-1.8483E-03

6.0918E-03

-3.8547E-03

1.3362E-03

-2.6768E-04

2.8926E-05

-1.3089E-06

S3

1.5302E-02

-1.3823E-02

-4.8756E-03

1.2739E-02

-9.2668E-03

3.6054E-03

-7.8815E-04

9.0747E-05

-4.2788E-06

S4

5.4931E-02

-4.5187E-02

3.5613E-02

-1.7187E-02

4.5494E-03

-7.8332E-04

1.5068E-04

-2.8386E-05

2.3408E-06

S5

-9.7281E-03

-1.1794E-02

7.1144E-03

-1.4445E-04

-1.6033E-03

5.9263E-04

-3.9797E-05

-1.2647E-05

1.6907E-06

S6

-4.2282E-02

3.1250E-02

-3.6519E-02

2.8617E-02

-1.4807E-02

4.8532E-03

-9.4689E-04

9.8889E-05

-4.2166E-06

S7

1.8702E-02

7.7807E-03

-1.0408E-02

6.0811E-03

-2.4606E-03

6.6439E-04

-9.5310E-05

4.3932E-06

1.7634E-07

S8

-6.4043E-03

1.1562E-02

-1.2403E-02

6.9447E-03

-2.1240E-03

3.8800E-04

-4.3932E-05

2.9244E-06

-8.8145E-08

S9

-3.0522E-02

2.7057E-02

-2.7131E-02

1.2539E-02

-2.2128E-03

-2.9089E-04

1.9932E-04

-3.4339E-05

2.1970E-06

S10

-6.4775E-03

1.7959E-02

-1.5257E-02

5.1815E-03

-6.3891E-04

-5.2783E-05

2.3955E-05

-2.5113E-06

9.0629E-08

S11

5.2174E-03

-1.4089E-02

1.2663E-02

-6.2150E-03

8.8429E-04

3.5816E-04

-1.5253E-04

2.0782E-05

-9.9233E-07

S12

1.9907E-04

-2.1924E-02

1.6069E-02

-7.0688E-03

1.8339E-03

-2.4309E-04

9.7540E-06

1.5321E-06

-1.8048E-07

S13

1.9480E-03

-1.0239E-02

3.2543E-03

-5.7526E-04

-9.2635E-05

5.8504E-05

-5.4445E-06

-1.3181E-06

2.0842E-07

S14

-5.9704E-03

-6.5855E-03

4.2636E-04

1.5760E-03

-1.0969E-03

3.7194E-04

-7.1350E-05

7.2713E-06

-3.0258E-07

S15

-2.4176E-03

-7.6416E-03

2.5853E-03

-9.0431E-04

2.8717E-04

-6.0639E-05

7.3004E-06

-4.4824E-07

1.0827E-08

S16

7.6017E-03

-4.2241E-03

3.3055E-04

4.5023E-05

-9.2967E-06

6.6204E-07

-2.3756E-08

4.3167E-10

-3.1646E-12

S17

-2.0502E-02

5.3528E-03

-2.9359E-03

7.5332E-04

-9.6948E-05

7.0377E-06

-2.9492E-07

6.6757E-09

-6.3225E-11

S18

3.2783E-02

-1.2868E-02

2.1380E-03

-2.0102E-04

1.1349E-05

-3.7180E-07

6.1474E-09

-2.6537E-11

-3.0933E-13

S19

2.5261E-02

-1.1798E-02

2.2388E-03

-2.5311E-04

1.8468E-05

-8.6471E-07

2.4839E-08

-3.9567E-10

2.6654E-12

S20

-1.0596E-02

5.4698E-04

-1.5557E-05

2.9387E-07

-3.9872E-09

3.5681E-11

-1.9282E-13

5.6492E-16

-6.8757E-19

Watch 10

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

Example 6

An 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 configuration diagram of an imaging lens according to embodiment 6 of the present application.

As shown in fig. 11, the imaging lens includes, in order from an object side to an image side: the stop STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the ninth lens E9, the tenth lens E10, the filter E11, and the image plane S23.

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 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 concave 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 concave image-side surface S16. The ninth lens element E9 has negative power, and has a concave object-side surface S17 and a convex image-side surface S18. The tenth lens element E10 has negative power, and has a concave object-side surface S19 and a concave image-side surface S20. Filter E11 has an object side S21 and an image side S22. Light from the object sequentially passes through the respective surfaces S1 to S22 and is finally imaged on the imaging surface S23.

Table 11 shows a basic parameter table of the 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 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

-3.1112E-04

-3.5616E-04

4.5700E-04

-3.3895E-04

1.4160E-04

-3.4048E-05

4.6255E-06

-3.2629E-07

9.2274E-09

S2

-2.1601E-03

-4.9089E-03

-9.3376E-04

1.0576E-03

-2.4703E-06

-1.3522E-04

3.9054E-05

-4.3284E-06

1.6416E-07

S3

1.3780E-02

-1.0894E-02

-1.2031E-03

3.0772E-03

-1.2492E-03

2.2225E-04

-1.0603E-05

-1.6472E-06

1.6331E-07

S4

4.5821E-02

-3.3515E-02

2.3538E-02

-1.2013E-02

4.7668E-03

-1.6250E-03

4.0380E-04

-5.7086E-05

3.3153E-06

S5

-1.7312E-02

-5.6390E-03

2.8445E-03

1.8740E-03

-2.0160E-03

6.5338E-04

-8.4636E-05

2.0697E-06

2.6790E-07

S6

-4.0085E-02

2.4249E-02

-2.5800E-02

1.9924E-02

-1.0067E-02

3.0984E-03

-5.5031E-04

5.1595E-05

-1.9899E-06

S7

2.2509E-02

5.2182E-04

-2.8924E-03

8.9622E-04

3.4936E-04

-5.1364E-04

2.1705E-04

-3.9427E-05

2.6306E-06

S8

-5.5930E-03

3.1138E-03

-1.8371E-03

5.0253E-04

-1.5144E-05

-1.4565E-05

2.4729E-06

-1.5393E-07

3.3041E-09

S9

-1.9179E-02

4.1247E-03

-2.1112E-03

-1.7914E-03

1.8568E-03

-7.4059E-04

1.6684E-04

-2.1616E-05

1.2713E-06

S10

-8.0515E-04

4.6505E-04

5.7871E-04

-1.2115E-03

5.7581E-04

-1.2599E-04

1.4390E-05

-8.2461E-07

1.8297E-08

S11

2.8834E-03

-7.3292E-03

-2.2227E-04

5.3724E-03

-4.2094E-03

1.5383E-03

-2.9623E-04

2.8953E-05

-1.1327E-06

S12

-4.6385E-03

-9.1983E-03

3.6358E-03

-5.4361E-04

6.6415E-05

-1.5788E-04

8.8692E-05

-1.7875E-05

1.2534E-06

S13

-9.1737E-03

-3.4648E-03

3.9527E-03

-4.2605E-03

2.7042E-03

-1.1078E-03

2.7574E-04

-3.7439E-05

2.1020E-06

S14

-1.9498E-02

-5.1112E-06

1.4259E-03

-1.1287E-03

5.4187E-04

-1.7745E-04

3.6164E-05

-4.0882E-06

1.9391E-07

S15

4.7580E-03

-1.1317E-02

4.4868E-03

-1.5029E-03

3.4941E-04

-5.0711E-05

3.8153E-06

-9.2414E-08

-1.7670E-09

S16

4.2316E-03

-2.9262E-03

1.6147E-04

4.1715E-05

-7.0474E-06

4.6732E-07

-1.5935E-08

2.7669E-10

-1.9406E-12

S17

-2.3186E-02

2.5951E-03

-7.4703E-04

2.2801E-04

-3.2958E-05

2.5299E-06

-1.0800E-07

2.4285E-09

-2.2428E-11

S18

4.3184E-02

-2.1414E-02

4.4022E-03

-5.1782E-04

3.8296E-05

-1.8180E-06

5.3944E-08

-9.1189E-10

6.6980E-12

S19

4.1211E-02

-1.9912E-02

3.7011E-03

-3.8149E-04

2.4282E-05

-9.7798E-07

2.4272E-08

-3.3830E-10

2.0230E-12

S20

-1.1323E-02

6.2127E-04

-2.1990E-05

4.5926E-07

-5.8866E-09

4.6112E-11

-2.1416E-13

5.4066E-16

-5.7125E-19

TABLE 12

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

Example 7

An imaging lens 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 imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, the image capturing lens system includes, in order from an object side to an image side: the stop STO, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the ninth lens E9, the tenth lens E10, the filter E11, and the image plane S23.

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 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 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 concave image-side surface S16. The ninth lens element E9 has negative power, and has a concave object-side surface S17 and a convex image-side surface S18. The tenth lens element E10 has negative power, and has a concave object-side surface S19 and a concave image-side surface S20. Filter E11 has an object side S21 and an image side S22. The light from the object passes through the respective surfaces S1 to S22 in order and is finally imaged on the imaging surface S23.

In this example, the total effective focal length f of the imaging lens is 6.90mm, and the maximum field angle FOV of the imaging lens is 81.6 °.

Table 13 shows a basic parameter table of the imaging lens of embodiment 7, in which the units of the radius of curvature, thickness/distance, and focal length are 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

-2.7999E-04

3.8655E-05

-6.3959E-05

2.3826E-05

-1.2614E-06

-5.4527E-07

9.7320E-08

-6.1160E-09

1.3540E-10

S2

-1.5294E-04

-4.9703E-03

-3.8213E-03

4.0335E-03

-1.3941E-03

2.2454E-04

-1.3074E-05

-5.1110E-07

6.3363E-08

S3

1.6055E-02

-1.1495E-02

-5.2815E-03

7.3387E-03

-3.2588E-03

7.6554E-04

-9.7848E-05

6.1232E-06

-1.3283E-07

S4

4.2956E-02

-2.8889E-02

1.8043E-02

-7.7192E-03

2.1929E-03

-5.6743E-04

1.4196E-04

-2.2411E-05

1.4332E-06

S5

-2.0456E-02

-2.8082E-03

5.2336E-03

-1.4255E-03

-7.1786E-04

5.1048E-04

-1.1992E-04

1.2812E-05

-5.2880E-07

S6

-4.0400E-02

2.0161E-02

-1.7065E-02

1.1911E-02

-5.8361E-03

1.7235E-03

-2.8004E-04

2.2317E-05

-6.5889E-07

S7

2.5512E-02

-3.7303E-03

-1.5672E-05

-4.9607E-04

9.4405E-04

-7.3005E-04

2.7030E-04

-4.6493E-05

3.0029E-06

S8

-2.9621E-03

6.0848E-04

-7.8788E-04

1.3455E-04

7.9609E-05

-2.9668E-05

3.8636E-06

-2.2181E-07

4.6613E-09

S9

-1.5125E-02

2.2973E-03

-9.6868E-04

-3.1163E-03

2.7533E-03

-1.0699E-03

2.3596E-04

-2.9424E-05

1.6347E-06

S10

-8.9505E-04

-8.1938E-04

2.8117E-03

-2.8118E-03

1.2013E-03

-2.6731E-04

3.2849E-05

-2.1221E-06

5.6363E-08

S11

5.3144E-03

-1.5005E-02

9.0504E-03

-5.4125E-04

-1.8069E-03

8.9870E-04

-1.9048E-04

1.9269E-05

-7.6077E-07

S12

-1.2550E-03

-1.6457E-02

1.0069E-02

-4.1286E-03

1.3523E-03

-4.2694E-04

1.1396E-04

-1.7660E-05

1.1150E-06

S13

-8.4160E-03

-4.5440E-03

4.1862E-03

-3.9432E-03

2.3159E-03

-9.1274E-04

2.2533E-04

-3.0913E-05

1.7654E-06

S14

-2.1713E-02

3.3075E-04

2.4435E-03

-2.2384E-03

1.1354E-03

-3.6773E-04

7.2925E-05

-8.0247E-06

3.7234E-07

S15

9.0628E-04

-8.3599E-03

2.0867E-03

-7.6137E-05

-1.9371E-04

7.6605E-05

-1.3943E-05

1.2453E-06

-4.3267E-08

S16

3.6704E-03

-3.3023E-03

4.7019E-04

-2.9458E-05

7.5488E-07

4.2232E-09

-6.6691E-10

1.3528E-11

-9.0272E-14

S17

-2.3823E-02

1.7692E-03

-1.0484E-04

6.4894E-05

-1.1789E-05

9.6459E-07

-4.1352E-08

9.0781E-10

-8.0497E-12

S18

3.8588E-02

-1.9220E-02

3.8752E-03

-4.5154E-04

3.3884E-05

-1.6712E-06

5.2320E-08

-9.3855E-10

7.3036E-12

S19

3.5394E-02

-1.6824E-02

2.9003E-03

-2.6777E-04

1.4908E-05

-5.1805E-07

1.1055E-08

-1.3331E-10

7.0025E-13

S20

-1.1837E-02

6.9736E-04

-2.8470E-05

6.2876E-07

-8.5590E-09

7.3956E-11

-3.9350E-13

1.1702E-15

-1.4824E-18

TABLE 14

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

In summary, examples 1 to 7 each satisfy the relationship shown in table 15.

Watch 15

The present application also provides an imaging device whose electron photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging apparatus 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 pickup lens.

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 a positive optical power;

a second lens having positive optical power;

a third lens having a negative optical power;

a fourth lens having a positive optical power;

a fifth lens having optical power;

a sixth lens having a negative refractive power;

a seventh lens having positive optical power;

an eighth lens having positive optical power;

a ninth lens having a negative optical power; and

a tenth lens having a negative optical power;

the total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens meet the following requirements: f/EPD is less than 1.7;

the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the camera lens meet the following conditions: TTL/ImgH is more than 1 and less than 1.6; and

the number of lenses having a refractive power in the imaging lens is ten.

2. The imaging lens according to claim 1, wherein a total effective focal length f of the imaging lens and an effective focal length f1 of the first lens satisfy: 1.5 < f1/f < 5.

3. The imaging lens according to claim 1, wherein a center thickness CT2 of the second lens on the optical axis and a separation distance T23 of the second lens and the third lens on the optical axis satisfy: 1 < (CT2+ T23)/(CT2-T23) < 1.5.

4. The imaging lens of claim 1, wherein a radius of curvature R5 of an object-side surface of the third lens and a radius of curvature R6 of an image-side surface of the third lens satisfy: 3 < (R5+ R6)/(R5-R6) < 5.

5. The imaging lens according to claim 1, wherein a total effective focal length f of the imaging lens and an effective focal length f3 of the third lens satisfy: -2 < f3/f < -1.5.

6. The imaging lens according to claim 1, wherein a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis satisfy: 1 < CT4/(CT3+ CT5) < 1.5.

7. The imaging lens according to claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, a distance T45 between the fourth lens and the fifth lens on the optical axis, and a distance T56 between the fifth lens and the sixth lens on the optical axis satisfy: 1 < (T45+ CT5)/(T56+ CT6) < 2.

8. The imaging lens according to claim 1, wherein an effective focal length f7 of the seventh lens and a radius of curvature R14 of an image side surface of the seventh lens satisfy: -3 < f7/R14 < -1.

9. The imaging lens according to claim 1, wherein an effective focal length f8 of the eighth lens, a center thickness CT8 of the eighth lens on the optical axis, a separation distance T78 of the seventh lens and the eighth lens on the optical axis, and a separation distance T89 of the eighth lens and the ninth lens on the optical axis satisfy: 5 < f8/(T78+ CT8+ T89) < 10.

10. The imaging lens according to claim 1, wherein a total effective focal length f of the imaging lens and an effective focal length f9 of the ninth lens satisfy: -0.2 < f/f9 < 0.

11. The imaging lens of claim 1, wherein an effective focal length f10 of the tenth lens, a radius of curvature R19 of an object-side surface of the tenth lens, and a radius of curvature R20 of an image-side surface of the tenth lens satisfy: 2 < (R19-R20)/f10 < 7.

12. An image-capturing lens according to any one of claims 1 to 11, characterized in that the optical distortion DIST corresponding to the maximum field angle of the image-capturing lens satisfies: the | DIST | < 3%.

13. Imaging lens according to any one of claims 1 to 11, characterized in that it further comprises a diaphragm,

the distance SD between the diaphragm and the image side surface of the tenth lens on the optical axis and the distance TTL between the object side surface of the first lens and the imaging surface of the camera lens on the optical axis satisfy the following conditions: SD/TTL is more than 0.75 and less than 0.9.