CN114114629A

CN114114629A - Camera lens

Info

Publication number: CN114114629A
Application number: CN202111474387.0A
Authority: CN
Inventors: 王彦; 徐武超; 肖海东; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-03-01

Abstract

The invention provides a camera lens. The image pickup lens sequentially includes from an object side to an image side along an optical axis: a first lens having a negative focal power, the object side surface of which is concave; a second lens having a positive optical power; a third lens with negative focal power, wherein the object side surface of the third lens is a convex surface; a fourth lens with positive focal power, wherein the object side surface is a concave surface, and the image side surface is a convex surface; a fifth lens having a negative optical power; wherein, satisfy between camera lens's effective focal length f and camera lens's entrance pupil diameter EPD: f/EPD < 1.9; the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens meet the following conditions: 3.5mm < f tan (FOV/2) <6 mm. The invention solves the problem that the camera lens in the prior art has large aperture, ultra-wide angle and high pixel which are difficult to realize simultaneously.

Description

Camera lens

Technical Field

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

Background

Along with the popularization of smart phones, the requirements of people on the photographing effect of the camera lens on the smart phone are gradually improved, and meanwhile the camera lens is required to meet different photographing effects. At present, mainstream manufacturers generally carry a plurality of different types of camera lenses in mobile phones to ensure high image quality and unique shooting effect. In general. In order to meet the effects of wide field of view and large depth of field in shooting, a camera lens with an ultra-wide angle characteristic is indispensable; to meet the shooting effect of clear imaging details, a large-aperture lens is required. The prior art provides a camera lens applied to a mobile phone, and although the camera lens has the characteristic of large aperture, the shooting range and the imaging quality are difficult to meet the actual requirements of users.

That is, the imaging lens in the related art has a problem that it is difficult to simultaneously implement a large aperture, an ultra-wide angle, and high pixels.

Disclosure of Invention

The invention mainly aims to provide a camera lens, which solves the problem that the camera lens in the prior art has large aperture, ultra-wide angle and high pixel which are difficult to realize simultaneously.

In order to achieve the above object, according to one aspect of the present invention, there is provided an imaging lens comprising, in order from an object side to an image side along an optical axis: a first lens having a negative focal power, the object side surface of which is concave; a second lens having a positive optical power; a third lens with negative focal power, wherein the object side surface of the third lens is a convex surface; a fourth lens with positive focal power, wherein the object side surface is a concave surface, and the image side surface is a convex surface; a fifth lens having a negative optical power; wherein, satisfy between camera lens's effective focal length f and camera lens's entrance pupil diameter EPD: f/EPD < 1.9; the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens meet the following conditions: 3.5mm < f tan (FOV/2) <6 mm.

Further, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy the following conditions: 1.0< (f3+ f5)/f1< 1.5.

Further, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: 0.8< (R8-R7)/f4< 1.3.

Further, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, and the effective focal length f2 of the second lens satisfy: 2.1< (R3-R4)/f2< 2.7.

Further, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens satisfy: 1.7< R5/R6< 2.5.

Further, the radius of curvature R9 of the object-side surface of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: 1.8< R9/R10< 2.6.

Further, the effective half-bore DT51 of the object side surface of the fifth lens and the effective half-bore DT21 of the object side surface of the second lens satisfy the following conditions: 2.4< DT51/DT21< 3.2.

Further, the effective half-aperture DT52 of the image side surface of the fifth lens and the effective half-aperture DT11 of the object side surface of the first lens satisfy: 1.0< DT52/DT11< 1.5.

Further, the combined focal length f23 of the second lens and the third lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy the following conditions: 1.1< f45/f23< 1.8.

Further, the central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens satisfy: 1.5< CT2/ET2< 2.0.

Further, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 1.0< (ET3+ ET4)/ET5< 1.6.

According to another aspect of the present invention, there is provided an imaging lens including, in order from an object side to an image side along an optical axis: a first lens having a negative focal power, the object side surface of which is concave; a second lens having a positive optical power; a third lens with negative focal power, wherein the object side surface of the third lens is a convex surface; a fourth lens with positive focal power, wherein the object side surface is a concave surface, and the image side surface is a convex surface; a fifth lens having a negative optical power; the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens meet the following conditions: 3.5mm < f tan (FOV/2) <6 mm; the central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens satisfy that: 1.5< CT2/ET2< 2.0.

Further, the effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens satisfy: f/EPD < 1.9; the effective focal length f1 of the first lens, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy the following conditions: 1.0< (f3+ f5)/f1< 1.5.

By applying the technical scheme of the invention, the camera lens sequentially comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power and a fifth lens with negative focal power from the object side to the image side along the optical axis; the object side surface of the first lens is a concave surface; the object side surface of the third lens is a convex surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; wherein, satisfy between camera lens's effective focal length f and camera lens's entrance pupil diameter EPD: f/EPD < 1.9; the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens meet the following conditions: 3.5mm < f tan (FOV/2) <6 mm.

The focal power and the surface type of each lens are reasonably configured, so that the imaging quality of the camera lens is improved, and the imaging effect of high pixels is ensured. The ratio of the effective focal length F of the camera lens to the entrance pupil diameter EPD of the camera lens is restricted within a reasonable range, so that the F number of the camera lens is smaller than 1.9, and the characteristic of large aperture can be favorably realized. By restricting the relation between the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens within a reasonable range, the imaging effect of a large image plane can be realized, so that the camera lens has a sufficiently large shooting range. In addition, the camera lens has the characteristics of high pixel, ultra-wide angle and large aperture, and can better meet the imaging requirement.

Drawings

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

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

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

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

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

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

fig. 12 to 15 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 11;

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

fig. 17 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 16;

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

fig. 22 to 25 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 21;

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

fig. 27 to 30 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 26.

Wherein the figures include the following reference numerals:

e1, a first lens; s1, the object side surface of the first lens; s2, the image side surface of the first lens; STO, stop; e2, a second lens; s3, the object side surface of the second lens; s4, the image side surface of the second lens; e3, third lens; s5, the object side surface of the third lens; s6, the image side surface of the third lens; e4, fourth lens; s7, the object side surface of the fourth lens; s8, the image side surface of the fourth lens; e5, fifth lens; s9, the object side surface of the fifth lens; s10, the image side surface of the fifth lens; e6, optical filters; s11, the object side surface of the optical filter; s12, the image side surface of the optical filter; and S13, imaging surface.

Detailed Description

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

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

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

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side becomes the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The determination of the surface shape in the paraxial region can be made by determining whether or not the surface shape is concave or convex using an R value (R denotes a radius of curvature of the paraxial region, and usually denotes an R value in a lens database (lens data) in optical software) according to a determination method by a person ordinarily skilled in the art. For the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.

The invention provides a camera lens, aiming at solving the problem that a camera lens in the prior art has large aperture, ultra-wide angle and high pixel which are difficult to realize simultaneously.

Example one

As shown in fig. 1 to 30, the imaging lens includes, in order from an object side to an image side along an optical axis, a first lens having negative optical power, a second lens having positive optical power, a third lens having negative optical power, a fourth lens having positive optical power, and a fifth lens having negative optical power; the object side surface of the first lens is a concave surface; the object side surface of the third lens is a convex surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; wherein, satisfy between camera lens's effective focal length f and camera lens's entrance pupil diameter EPD: f/EPD < 1.9; the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens meet the following conditions: 3.5mm < f tan (FOV/2) <6 mm.

Preferably, 3.7mm < f tan (FOV/2) <4.1 mm.

In the present embodiment, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy: 1.0< (f3+ f5)/f1< 1.5. When the conditional expression is satisfied, the focal power of the system can be reasonably distributed, so that the positive spherical aberration and the negative spherical aberration between the first lens, the third lens and the fifth lens are mutually offset. Preferably, 1.1< (f3+ f5)/f1< 1.4.

In the present embodiment, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: 0.8< (R8-R7)/f4< 1.3. The method meets the conditional expression, can effectively control the astigmatism of the system, and further can improve the imaging quality of the off-axis field of view. Preferably, 1.0< (R8-R7)/f4< 1.2.

In the present embodiment, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, and the effective focal length f2 of the second lens satisfy: 2.1< (R3-R4)/f2< 2.7. The conditional expression is satisfied, so that the field curvature contribution amount of the second lens is in a reasonable range to balance the field curvature amount generated by the rear lens. Preferably, 2.4< (R3-R4)/f2< 2.5.

In the present 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 satisfy: 1.7< R5/R6< 2.5. The condition is satisfied, the sharing of the large field of view on the object side can be effectively realized, the correction capability of subsequent lenses on off-axis aberration is improved, and a better imaging effect is obtained. Preferably, 1.9< R5/R6< 2.3.

In the present embodiment, the radius of curvature R9 of the object-side surface of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: 1.8< R9/R10< 2.6. The conditional expression is satisfied, the deflection angle of the system edge light can be reasonably controlled, and the sensitivity of the system is effectively reduced. Preferably, 2.0< R9/R10< 2.4.

In this embodiment, the effective half-aperture DT51 of the object-side surface of the fifth lens and the effective half-aperture DT21 of the object-side surface of the second lens satisfy: 2.4< DT51/DT21< 3.2. The size of the lens can be reasonably distributed, the reasonability of the structure of the camera lens is ensured, and the camera lens is easy to process and assemble. Preferably 2.7< DT51/DT21< 3.0.

In the present embodiment, the effective half-aperture DT52 of the image-side surface of the fifth lens and the effective half-aperture DT11 of the object-side surface of the first lens satisfy: 1.0< DT52/DT11< 1.5. The condition is satisfied, the front end size of the camera lens can be effectively reduced, and the lens screen occupation ratio is reduced. Preferably, 1.2< DT52/DT11< 1.4.

In the present embodiment, the combined focal length f23 of the second and third lenses and the combined focal length f45 of the fourth and fifth lenses satisfy: 1.1< f45/f23< 1.8. Satisfying the conditional expression can balance the contribution of lens aberration in the camera lens, and make the aberration in a reasonable level state. Preferably, 1.3< f45/f23< 1.7.

In the present embodiment, the central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens satisfy: 1.5< CT2/ET2< 2.0. The ratio of the central thickness CT2 of the second lens on the optical axis to the edge thickness ET2 of the second lens is restricted within a reasonable range, so that the second lens has good processing property, and the total system length TTL of the camera lens is ensured within a certain range, so that miniaturization is ensured. Preferably, 1.6< CT2/ET2< 1.8.

In the present embodiment, the edge thicknesses ET3, ET4 and ET5 of the third, fourth and fifth lenses satisfy: 1.0< (ET3+ ET4)/ET5< 1.6. By constraining the relation among the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens within a reasonable range, on one hand, the distortion of the system can be reasonably controlled, and the camera lens has good distortion performance; on the other hand, ghost images in the system can be reasonably controlled, so that the camera lens has good optical performance. Preferably, 1.1< (ET3+ ET4)/ET5< 1.5.

Example two

As shown in fig. 1 to 30, the imaging lens includes, in order from an object side to an image side along an optical axis, a first lens having negative optical power, a second lens having positive optical power, a third lens having negative optical power, a fourth lens having positive optical power, and a fifth lens having negative optical power; the object side surface of the first lens is a concave surface; the object side surface of the third lens is a convex surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens meet the following conditions: 3.5mm < f tan (FOV/2) <6 mm; the central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens satisfy that: 1.5< CT2/ET2< 2.0.

Preferably, 3.7mm < f tan (FOV/2) <4.1 mm.

Preferably, 1.6< CT2/ET2< 1.8.

The focal power and the surface type of each lens are reasonably configured, so that the imaging quality of the camera lens is improved, and the imaging effect of high pixels is ensured. By restricting the relation between the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens within a reasonable range, the imaging effect of a large image plane can be realized, so that the camera lens has a sufficiently large shooting range. The ratio of the central thickness CT2 of the second lens on the optical axis to the edge thickness ET2 of the second lens is restricted within a reasonable range, so that the second lens has good processing property, and the total system length TTL of the camera lens is ensured within a certain range, so that miniaturization is ensured. In addition, the camera lens has the characteristics of high pixel, ultra-wide angle and large aperture, and can better meet the imaging requirement.

In the present embodiment, the effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens satisfy: f/EPD < 1.9. The ratio of the effective focal length F of the camera lens to the entrance pupil diameter EPD of the camera lens is restricted within a reasonable range, so that the F number of the camera lens is smaller than 1.9, and the characteristic of large aperture can be favorably realized.

The above-described image pickup lens may further optionally include a filter for correcting color deviation or a protective glass for protecting a photosensitive element located on the image forming surface.

The imaging lens in the present application may employ a plurality of lenses, for example, five lenses 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 the lenses and the like, the aperture of the camera lens can be effectively increased, the sensitivity of the lens is reduced, and the machinability of the lens is improved, so that the camera lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The left side is the object side and the right side is the image side.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens has the characteristics 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 lens center to the lens periphery, an aspherical lens has a better curvature radius characteristic, 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.

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

Examples of specific surface types and parameters of the imaging lens applicable to the above embodiments are further described below with reference to the drawings.

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

Example one

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

As shown in fig. 1, the imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an image plane S13.

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

In this example, the total effective focal length f of the camera lens is 2.19mm, the total system length TTL of the camera lens is 6.50mm and the image height ImgH is 3.69 mm.

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

TABLE 1

In the first example, the object-side surface and the image-side surface of any one of the first lens E1 through the fifth lens E5 are aspheric surfaces, and the surface shape 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 gives the high-order coefficient coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each of the aspherical mirrors S1-S10 in example one.

TABLE 2

Fig. 2 shows an axial chromatic aberration curve of the imaging lens of the first example, which shows the deviation of the convergent focal points of the light rays of different wavelengths after passing through the imaging lens. Fig. 3 shows astigmatism curves of the imaging lens of the first example, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the imaging lens of the first example, which show distortion magnitude values corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the imaging lens of the first example, which shows the deviation of different image heights on the image formation plane after the light passes through the imaging lens.

As can be seen from fig. 2 to 5, the imaging lens according to the first example can achieve good imaging quality.

Example two

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

As shown in fig. 6, the imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an image plane S13.

In this example, the total effective focal length f of the camera lens is 2.24mm, the total system length TTL of the camera lens is 6.50mm and the image height ImgH is 3.69 mm.

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

TABLE 3

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

9.2690E-02

-4.5240E-02

2.2623E-02

-7.6285E-03

-1.3124E-03

4.5232E-03

-3.8411E-03

S2

1.8886E-01

-5.5446E-01

4.5954E+00

-2.5618E+01

9.6469E+01

-2.5606E+02

4.9283E+02

S3

-3.1183E-02

7.7743E-01

-2.3504E+01

3.9546E+02

-4.3956E+03

3.4400E+04

-1.9528E+05

S4

1.2220E-01

-2.5650E+00

3.2475E+01

-2.5680E+02

1.3714E+03

-5.1523E+03

1.3905E+04

S5

-2.4955E-01

-7.2298E-01

9.3879E+00

-5.8196E+01

2.4172E+02

-7.2193E+02

1.5982E+03

S6

-2.0508E-01

9.7311E-02

7.0043E-01

-3.1724E+00

8.1884E+00

-1.5614E+01

2.4188E+01

S7

1.4259E-01

-2.6065E-01

6.8712E-01

-1.7980E+00

3.8061E+00

-5.9042E+00

6.6257E+00

S8

5.1270E-01

-1.5441E+00

3.5167E+00

-5.8630E+00

7.3529E+00

-7.1604E+00

5.5593E+00

S9

1.5451E-01

-1.1422E+00

2.7112E+00

-4.3238E+00

4.8860E+00

-3.9854E+00

2.3719E+00

S10

-4.4491E-01

4.2724E-01

-4.3914E-01

3.7661E-01

-2.4404E-01

1.1655E-01

-4.0953E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

2.0210E-03

-7.3250E-04

1.8645E-04

-3.2831E-05

3.8132E-06

-2.6294E-07

8.1541E-09

S2

-6.9715E+02

7.2572E+02

-5.4971E+02

2.9478E+02

-1.0606E+02

2.2964E+01

-2.2613E+00

S3

8.1028E+05

-2.4429E+06

5.2637E+06

-7.8642E+06

7.7160E+06

-4.4620E+06

1.1509E+06

S4

-2.7211E+04

3.8565E+04

-3.9090E+04

2.7544E+04

-1.2774E+04

3.4928E+03

-4.2458E+02

S5

-2.6606E+03

3.3349E+03

-3.1065E+03

2.0852E+03

-9.5168E+02

2.6366E+02

-3.3373E+01

S6

-3.1534E+01

3.3748E+01

-2.7891E+01

1.6614E+01

-6.6014E+00

1.5530E+00

-1.6292E-01

S7

-5.3867E+00

3.1623E+00

-1.3232E+00

3.8363E-01

-7.2998E-02

8.1650E-03

-4.0464E-04

S8

-3.4643E+00

1.7032E+00

-6.3668E-01

1.7178E-01

-3.1133E-02

3.3623E-03

-1.6259E-04

S9

-1.0343E+00

3.2923E-01

-7.5471E-02

1.2109E-02

-1.2887E-03

8.1617E-05

-2.3262E-06

S10

1.0590E-02

-2.0055E-03

2.7423E-04

-2.6298E-05

1.6748E-06

-6.3493E-08

1.0825E-09

TABLE 4

Fig. 7 shows an axial chromatic aberration curve of the imaging lens of example two, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 8 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example two. Fig. 9 shows distortion curves of the imaging lens of example two, which show values of distortion magnitudes corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the imaging lens of the second example, which shows the deviation of different image heights on the image forming surface after the light passes through the imaging lens.

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

Example III

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

As shown in fig. 11, the imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an image plane S13.

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

In this example, the total effective focal length f of the camera lens is 2.20mm, the total system length TTL of the camera lens is 6.46mm and the image height ImgH is 3.69 mm.

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

TABLE 5

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

9.7417E-02

-2.9558E-02

-3.6461E-02

9.6475E-02

-1.1848E-01

9.5314E-02

-5.3825E-02

S2

1.3466E-01

2.7410E-01

-2.7677E+00

1.5686E+01

-6.0554E+01

1.6464E+02

-3.2090E+02

S3

-1.8889E-02

-7.3565E-02

8.2213E+00

-2.5828E+02

3.9296E+03

-3.5800E+04

2.1350E+05

S4

1.3008E-01

-2.6573E+00

3.3784E+01

-2.7130E+02

1.4705E+03

-5.5811E+03

1.5141E+04

S5

-2.5509E-01

-6.8580E-01

9.7367E+00

-6.8470E+01

3.3092E+02

-1.1558E+03

2.9696E+03

S6

-1.7924E-01

-3.0394E-01

4.1114E+00

-2.2287E+01

8.1321E+01

-2.1189E+02

4.0152E+02

S7

1.2777E-01

-8.2042E-02

-4.5906E-01

2.6762E+00

-7.6043E+00

1.4032E+01

-1.7975E+01

S8

5.8235E-01

-1.7691E+00

3.8504E+00

-5.6081E+00

5.2252E+00

-2.6549E+00

4.5021E-03

S9

2.1186E-01

-1.4137E+00

3.4359E+00

-5.6291E+00

6.4919E+00

-5.3768E+00

3.2408E+00

S10

-4.2748E-01

4.1199E-01

-4.3418E-01

3.7490E-01

-2.3956E-01

1.1112E-01

-3.7479E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

2.1840E-02

-6.3995E-03

1.3421E-03

-1.9641E-04

1.9045E-05

-1.0994E-06

2.8604E-08

S2

4.5317E+02

-4.6447E+02

3.4218E+02

-1.7662E+02

6.0638E+01

-1.2439E+01

1.1536E+00

S3

-8.7211E+05

2.4908E+06

-4.9831E+06

6.8585E+06

-6.1978E+06

3.3158E+06

-7.9683E+05

S4

-2.9657E+04

4.1930E+04

-4.2287E+04

2.9591E+04

-1.3611E+04

3.6879E+03

-4.4414E+02

S5

-5.6484E+03

7.9254E+03

-8.0833E+03

5.8161E+03

-2.7932E+03

8.0220E+02

-1.0407E+02

S6

-5.5738E+02

5.6595E+02

-4.1520E+02

2.1410E+02

-7.3564E+01

1.5114E+01

-1.4038E+00

S7

1.6407E+01

-1.0755E+01

5.0268E+00

-1.6350E+00

3.5147E-01

-4.4875E-02

2.5756E-03

S8

1.0721E+00

-8.5370E-01

3.6555E-01

-9.6862E-02

1.5853E-02

-1.4701E-03

5.9029E-05

S9

-1.4304E+00

4.6130E-01

-1.0733E-01

1.7522E-02

-1.9030E-03

1.2339E-04

-3.6131E-06

S10

9.2052E-03

-1.6379E-03

2.0778E-04

-1.8199E-05

1.0369E-06

-3.4144E-08

4.8325E-10

TABLE 6

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

As can be seen from fig. 12 to 15, the imaging lens according to the third example can achieve good imaging quality.

Example four

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

As shown in fig. 16, the imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an image plane S13.

In this example, the total effective focal length f of the imaging lens is 2.08mm, the total system length TTL of the imaging lens is 6.50mm and the image height ImgH is 3.69 mm.

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

TABLE 7

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

TABLE 8

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

As can be seen from fig. 17 to 20, the imaging lens according to example four can achieve good imaging quality.

Example five

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

As shown in fig. 21, the imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an image plane S13.

In this example, the total effective focal length f of the camera lens is 2.23mm, the total system length TTL of the camera lens is 6.50mm and the image height ImgH is 3.69 mm.

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

TABLE 9

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

9.5322E-02

-5.0798E-02

2.8886E-02

-8.7105E-03

-8.2141E-03

1.5015E-02

-1.1992E-02

S2

1.7854E-01

-3.4512E-01

2.1934E+00

-9.7775E+00

2.8801E+01

-5.7318E+01

7.7520E+01

S3

-2.1555E-02

1.0154E-01

-2.3106E+00

1.1929E+01

3.5821E+01

-3.0741E+02

-4.2535E+03

S4

1.2421E-01

-2.4945E+00

3.1585E+01

-2.5111E+02

1.3472E+03

-5.0671E+03

1.3623E+04

S5

-2.4011E-01

-1.0369E+00

1.3159E+01

-8.8139E+01

4.0613E+02

-1.3581E+03

3.3599E+03

S6

-1.8716E-01

-2.5158E-01

3.5122E+00

-1.7643E+01

5.9781E+01

-1.4705E+02

2.6723E+02

S7

1.3265E-01

-1.0723E-01

-3.5100E-01

2.3197E+00

-6.7880E+00

1.2790E+01

-1.6729E+01

S8

5.8796E-01

-1.8175E+00

4.1656E+00

-6.8807E+00

8.4195E+00

-7.8976E+00

5.8697E+00

S9

2.1708E-01

-1.4097E+00

3.3470E+00

-5.3372E+00

6.0099E+00

-4.8859E+00

2.9054E+00

S10

-4.2883E-01

3.8492E-01

-3.5278E-01

2.6356E-01

-1.4718E-01

5.9707E-02

-1.7357E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

6.0441E-03

-2.0712E-03

4.9080E-04

-7.9380E-05

8.3794E-06

-5.2105E-07

1.4492E-08

S2

-6.8634E+01

3.3814E+01

-5.0207E-01

-1.1615E+01

7.9640E+00

-2.4523E+00

3.0528E-01

S3

5.6975E+04

-3.0266E+05

9.1763E+05

-1.7126E+06

1.9532E+06

-1.2527E+06

3.4702E+05

S4

-2.6395E+04

3.6785E+04

-3.6369E+04

2.4750E+04

-1.0943E+04

2.8011E+03

-3.0996E+02

S5

-6.1889E+03

8.4534E+03

-8.4335E+03

5.9614E+03

-2.8236E+03

8.0248E+02

-1.0331E+02

S6

-3.5999E+02

3.5761E+02

-2.5806E+02

1.3136E+02

-4.4664E+01

9.0945E+00

-8.3811E-01

S7

1.5608E+01

-1.0468E+01

5.0084E+00

-1.6679E+00

3.6718E-01

-4.8009E-02

2.8217E-03

S8

-3.5168E+00

1.6843E+00

-6.2265E-01

1.6813E-01

-3.0726E-02

3.3597E-03

-1.6483E-04

S9

-1.2703E+00

4.0699E-01

-9.4275E-02

1.5346E-02

-1.6633E-03

1.0772E-04

-3.1523E-06

S10

3.5460E-03

-4.8790E-04

4.0451E-05

-1.2127E-06

-1.0463E-07

1.1436E-08

-3.3464E-10

Watch 10

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

As can be seen from fig. 22 to 25, the imaging lens according to example five can achieve good imaging quality.

Example six

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

As shown in fig. 26, the imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an image plane S13.

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

TABLE 11

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

9.1686E-02

-3.7142E-02

-9.4192E-04

3.6163E-02

-5.6704E-02

5.3520E-02

-3.4768E-02

S2

1.8015E-01

-5.0110E-01

3.8084E+00

-1.9304E+01

6.5218E+01

-1.5293E+02

2.5543E+02

S3

-4.0245E-02

9.7675E-01

-2.7687E+01

4.4282E+02

-4.6496E+03

3.4169E+04

-1.8178E+05

S4

9.1469E-02

-1.5521E+00

2.0128E+01

-1.6609E+02

9.2232E+02

-3.5898E+03

1.0006E+04

S5

-2.7897E-01

-8.3925E-03

1.4207E+00

-2.9620E+00

-2.2405E+01

1.8545E+02

-6.8451E+02

S6

-2.2153E-01

2.1202E-01

-3.1946E-02

4.8670E-01

-5.6938E+00

2.3729E+01

-5.8251E+01

S7

1.1264E-01

-1.4665E-03

-6.2575E-01

2.4799E+00

-5.5981E+00

8.5658E+00

-9.3256E+00

S8

5.8314E-01

-1.7270E+00

3.6297E+00

-5.2052E+00

5.1024E+00

-3.4103E+00

1.5697E+00

S9

2.3559E-01

-1.3947E+00

3.1541E+00

-4.7583E+00

5.0634E+00

-3.8889E+00

2.1836E+00

S10

-4.3751E-01

3.8553E-01

-3.5532E-01

2.7975E-01

-1.7266E-01

8.1077E-02

-2.8673E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

1.6119E-02

-5.3840E-03

1.2867E-03

-2.1470E-04

2.3757E-05

-1.5663E-06

4.6571E-08

S2

-3.0731E+02

2.6594E+02

-1.6312E+02

6.8672E+01

-1.8659E+01

2.8950E+00

-1.8870E-01

S3

7.0828E+05

-2.0140E+06

4.1132E+06

-5.8508E+06

5.4850E+06

-3.0388E+06

7.5227E+05

S4

-2.0168E+04

2.9370E+04

-3.0522E+04

2.2006E+04

-1.0425E+04

2.9071E+03

-3.5991E+02

S5

1.5735E+03

-2.4363E+03

2.5918E+03

-1.8727E+03

8.7946E+02

-2.4228E+02

2.9724E+01

S6

9.5385E+01

-1.0866E+02

8.6797E+01

-4.7796E+01

1.7307E+01

-3.7118E+00

3.5743E-01

S7

7.3633E+00

-4.2374E+00

1.7624E+00

-5.1656E-01

1.0128E-01

-1.1932E-02

6.3903E-04

S8

-5.5311E-01

2.1346E-01

-1.0320E-01

4.1141E-02

-1.0358E-02

1.4367E-03

-8.4054E-05

S9

-9.0051E-01

2.7178E-01

-5.9196E-02

9.0415E-03

-9.1737E-04

5.5459E-05

-1.5101E-06

S10

7.5852E-03

-1.4856E-03

2.1149E-04

-2.1199E-05

1.4142E-06

-5.6227E-08

1.0063E-09

TABLE 12

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

As can be seen from fig. 27 to 30, the imaging lens according to example six can achieve good image quality.

To sum up, examples one to six satisfy the relationships shown in table 13, respectively.

Table 13 table 14 gives effective focal lengths f of the imaging lenses of example one to example six, effective focal lengths f1 to f5 of the respective lenses, and the like.

Parameter/example	1	2	3	4	5	6
							f1(mm)	-6.29	-6.35	-6.80	-6.17	-6.42	-6.60
f2(mm)	2.04	2.05	2.05	2.05	2.03	2.02
							f3(mm)	-4.72	-4.85	-4.78	-4.67	-4.61	-4.46
f4(mm)	2.13	2.21	2.13	2.15	2.12	2.13
							f5(mm)	-3.02	-3.09	-2.97	-3.39	-2.94	-3.00
f(mm)	2.19	2.24	2.20	2.08	2.23	2.24
							TTL(mm)	6.50	6.50	6.46	6.50	6.50	6.50
ImgH(mm)	3.69	3.69	3.69	3.69	3.69	3.69

TABLE 14

The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described image pickup lens.

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

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

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

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

Claims

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

a first lens having a negative focal power, the object side surface of which is concave;

a second lens having a positive optical power;

a third lens with negative focal power, wherein the object side surface of the third lens is a convex surface;

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

a fifth lens having a negative optical power;

wherein the effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens satisfy: f/EPD < 1.9; the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens meet the following conditions: 3.5mm < f tan (FOV/2) <6 mm.

2. The imaging lens according to claim 1, wherein an effective focal length f1 of the first lens, an effective focal length f3 of the third lens, and an effective focal length f5 of the fifth lens satisfy: 1.0< (f3+ f5)/f1< 1.5.

3. The imaging lens according to claim 1, wherein a radius of curvature R7 of an object-side surface of the fourth lens, a radius of curvature R8 of an image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens satisfy: 0.8< (R8-R7)/f4< 1.3.

4. The imaging lens according to claim 1, wherein a radius of curvature R3 of an object-side surface of the second lens, a radius of curvature R4 of an image-side surface of the second lens, and an effective focal length f2 of the second lens satisfy: 2.1< (R3-R4)/f2< 2.7.

5. The imaging lens according to 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: 1.7< R5/R6< 2.5.

6. The imaging lens according to claim 1, wherein a radius of curvature R9 of an object-side surface of the fifth lens element and a radius of curvature R10 of an image-side surface of the fifth lens element satisfy: 1.8< R9/R10< 2.6.

7. The imaging lens according to claim 1, wherein an effective half-aperture DT51 of an object-side surface of the fifth lens element and an effective half-aperture DT21 of an object-side surface of the second lens element satisfy: 2.4< DT51/DT21< 3.2.

8. The imaging lens according to claim 1, wherein an effective half-aperture DT52 of an image side surface of the fifth lens element and an effective half-aperture DT11 of an object side surface of the first lens element satisfy: 1.0< DT52/DT11< 1.5.

9. The imaging lens according to claim 1, wherein a combined focal length f23 of the second lens piece and the third lens piece and a combined focal length f45 of the fourth lens piece and the fifth lens piece satisfy: 1.1< f45/f23< 1.8.

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

a second lens having a positive optical power;

a fifth lens having a negative optical power;

wherein the effective focal length f of the camera lens and the maximum field angle FOV of the camera lens satisfy the following conditions: 3.5mm < f tan (FOV/2) <6 mm; the central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens satisfy: 1.5< CT2/ET2< 2.0.