CN107462976B

CN107462976B - Camera lens

Info

Publication number: CN107462976B
Application number: CN201710820117.8A
Authority: CN
Inventors: 王新权
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2017-09-13
Filing date: 2017-09-13
Publication date: 2022-10-04
Anticipated expiration: 2037-09-13
Also published as: CN107462976A

Abstract

The application discloses camera lens, this camera lens includes by order along optical axis from the thing side to picture side: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens and the third lens both have positive focal power or negative focal power; the fourth lens has positive focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface; the effective half-aperture DT52 of the image side surface of the fifth lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the camera lens meet the condition that DT52/ImgH is more than 0.75 and less than 1.

Description

Camera lens

Technical Field

The present application relates to an image pickup lens, and more particularly, to a large aperture image pickup lens including five lenses.

Background

With the improvement of performance and size reduction of common photosensitive devices such as a photosensitive coupling device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), higher requirements are made on high imaging quality and miniaturization of a corresponding imaging lens.

Meanwhile, with the common photosensitive element being capable of being used in the infrared light range, the application of the lens is expanded to the fields of infrared imaging, distance detection, infrared identification and the like. The existing small-sized camera lens generally has a large f-number Fno and a small light-entering amount, so that the detection and identification accuracy cannot be ensured. In order to better meet the requirements of the fields of detection, identification and the like on the lens, the camera lens is required to have a larger aperture while ensuring a small size.

Disclosure of Invention

The present application provides a large aperture image pickup lens applicable to a portable electronic product that can solve at least or partially at least one of the above-mentioned disadvantages in the related art.

In one aspect, the present application provides an imaging lens, sequentially 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, and a fifth lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface, and the image side surface of the first lens can be a concave surface; the second lens and the third lens both have positive focal power or negative focal power; the fourth lens can have positive focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens can have negative focal power, and the object side surface of the fifth lens can be a concave surface; the effective half aperture DT52 of the image side surface of the fifth lens and the half length ImgH of the diagonal line of the effective pixel area on the imaging surface of the camera lens can meet the condition that DT52/ImgH is more than 0.75 and less than 1.

In one embodiment, the total effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens may satisfy f/EPD < 1.6.

In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the image pickup lens may satisfy 1.4 < f1/f < 2.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy-5 < (R1 + R2)/(R1-R2) < -3.

In one embodiment, the radius of curvature R8 of the image-side surface of the fourth lens element and the radius of curvature R9 of the object-side surface of the fifth lens element satisfy 1.2 < R8/R9 < 3.5.

In one embodiment, the curvature radius R9 of the object-side surface of the fifth lens and the effective focal length f5 of the fifth lens may satisfy 0 < R9/f5 < 0.8.

In one embodiment, the radius of curvature R9 of the object-side surface of the fifth lens element and the total effective focal length f of the image capture lens can satisfy R9/f > -0.5.

In one embodiment, the central thickness CT1 of the first lens element on the optical axis and the central thickness CT4 of the fourth lens element on the optical axis satisfy 0.6 < CT1/CT4 < 1.1.

In one embodiment, the central thickness CT3 of the third lens element on the optical axis and the central thickness CT5 of the fifth lens element on the optical axis satisfy 0.8 < CT3/CT5 < 1.2.

In one embodiment, a separation distance T12 of the first lens and the second lens on the optical axis, a separation distance T23 of the second lens and the third lens on the optical axis, and a separation distance T34 of the third lens and the fourth lens on the optical axis may satisfy 0.1 < T34/(T12 + T23) < 0.5.

In one embodiment, the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the camera lens and half ImgH of the diagonal length of the effective pixel area on the imaging surface of the camera lens satisfy TTL/ImgH < 1.6.

In one embodiment, a distance SAG51 on the optical axis between an intersection point of the object-side surface of the fifth lens and the optical axis to an effective semi-aperture vertex of the object-side surface of the fifth lens and a distance SAG52 on the optical axis between an intersection point of the image-side surface of the fifth lens and the optical axis to an effective semi-aperture vertex of the image-side surface of the fifth lens may satisfy 0.8 < SAG51/SAG52 < 1.8.

In one embodiment, the first lens can be a glass lens, and the thermal expansion coefficient TCE1 of the first lens can satisfy TCE1 < 15 × 10 ^-6 /℃。

In another aspect, the present application further provides an imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The object side surface of the first lens can be a convex surface, and the image side surface of the first lens can be a concave surface; at least one of the object-side surface and the image-side surface of the second lens may be convex; at least one of the object-side surface and the image-side surface of the third lens may be concave; the fourth lens can have positive focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens element has a negative power and may have a concave object-side surface. And the distance SAG51 on the optical axis between the intersection point of the object side surface of the fifth lens and the optical axis and the effective semi-caliber vertex of the object side surface of the fifth lens and the distance SAG52 on the optical axis between the intersection point of the image side surface of the fifth lens and the optical axis and the effective semi-caliber vertex of the image side surface of the fifth lens can satisfy 0.8 < SAG51/SAG52 < 1.8.

In one embodiment, the first lens may have a positive optical power.

In another aspect, the present application further 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, and a fifth lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface, and the image side surface of the first lens can be a concave surface; the second lens and the third lens both have positive focal power or negative focal power; the fourth lens can have positive focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens can have negative focal power, and the object side surface of the fifth lens can be a concave surface; the total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens can meet the condition that f/EPD is less than 1.6; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the camera lens and the half of the length ImgH of the diagonal line of the effective pixel area on the imaging surface of the camera lens can meet the condition that TTL/ImgH is less than 1.6.

Through reasonable distribution of focal power, surface type, center thickness of each lens, on-axis distance between each lens and the like, the camera lens has at least one beneficial effect of miniaturization, low sensitivity, large aperture and the like while realizing good imaging quality.

Drawings

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

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

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

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

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

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

fig. 10A to 10D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration 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 axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the imaging lens of example 6.

Detailed Description

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

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

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

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface, and the surface of each lens closest to the image plane is called the image side surface.

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

The 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 includes, for example, five lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in order from the object side to the image side along the optical axis. The camera lens can further comprise a photosensitive element arranged on an imaging surface.

The first lens element can have a positive power, and can have a convex object-side surface and a concave image-side surface. Through the reasonable arrangement of the focal power and the surface type of the first lens, the spherical aberration of the imaging system can be corrected, and the total optical length of the imaging system can be shortened.

An effective focal length f1 of the first lens and a total effective focal length f of the image pickup lens may satisfy 1.4 < f1/f < 2, and more specifically, f1 and f may further satisfy 1.43 ≦ f1/f ≦ 1.74. The condition that f1/f is more than 1.4 and less than 2 is met, and the total length of the imaging system is favorably shortened.

The radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens can satisfy-5 < (R1 + R2)/(R1-R2) < -3, and more specifically, R1 and R2 can further satisfy-4.48 ≦ (R1 + R2)/(R1-R2) ≦ -3.17. Satisfying the conditional expression-5 < (R1 + R2)/(R1-R2) < -3, helps to control the spherical aberration generated by the first lens within a reasonable range; meanwhile, the total length of the imaging system is favorably shortened.

The first lens can be made of glass material, and its thermal expansion coefficient TCE1 can meet the condition that TCE1 is less than 15X 10 ^-6 V. C. The glass material generally has higher refractive index, and the use of the glass material can slow down the bending degree of the surface of the lens, thereby being beneficial to the manufacturing and processing of the lens; meanwhile, the glass material has small temperature refractive index coefficient change, and in the application of changing the environmental temperature, the glass material lens is favorable for keeping the stability of an image plane and improving the heat resistance of an imaging system.

The second lens has positive or negative power, and at least one of the object-side surface and the image-side surface thereof may be convex.

The third lens has a positive power or a negative power, and at least one of the object-side surface and the image-side surface thereof may be concave. Alternatively, the third lens may have a negative power, and the image-side surface thereof may be concave.

The fourth lens element can have positive power, and can have a convex object-side surface and a convex image-side surface. Through reasonable arrangement of the focal power and the surface type of the fourth lens, the focal power of the imaging system can be dispersed, and the tolerance sensitivity of the imaging system can be reduced.

The fifth lens element may have a negative optical power, and the object-side surface thereof may be concave. Through the reasonable arrangement of the focal power and the surface type of the fifth lens, the total length of the imaging system is favorably shortened, and further miniaturization is realized.

The radius of curvature R8 of the image-side surface of the fourth lens element and the radius of curvature R9 of the object-side surface of the fifth lens element can satisfy 1.2 < R8/R9 < 3.5, and more specifically, R8 and R9 can further satisfy 1.23 < R8/R9 < 2.25. The condition that R8/R9 is more than 1.2 and less than 3.5 is satisfied, so that astigmatism generated by the optical imaging system can be corrected, and aberration can be reduced.

The radius of curvature R9 of the object-side surface of the fifth lens and the effective focal length f5 of the fifth lens may satisfy 0 < R9/f5 < 0.8, and more specifically, R9 and f5 may further satisfy 0.52. Ltoreq. R9/f 5. Ltoreq.0.62. The condition that R9/f5 is more than 0 and less than 0.8 is satisfied, which is beneficial to the processing and molding of the lens and the shortening of the optical total length of the imaging system.

R9/f > -0.5 can be satisfied between the curvature radius R9 of the object-side surface of the fifth lens and the total effective focal length f of the image pickup lens, and more specifically, R9 and f can further satisfy-0.42 ≦ R9/f ≦ -0.38. Satisfying the conditional expression R9/f > -0.5 is beneficial to the movement of the image side imaging surface to the side of the object, thereby being beneficial to shortening the optical total length of the imaging system and leading the system to have the miniaturization characteristic.

The effective half aperture DT52 of the image side surface of the fifth lens and the half length ImgH of the diagonal line of the effective pixel area on the imaging surface of the camera lens can satisfy 0.75 < DT52/ImgH < 1, and more specifically, DT52 and ImgH can further satisfy 0.81 < DT52/ImgH < 0.90. The optical lens meets the conditional expression that DT52/ImgH is more than 0.75 and less than 1, is beneficial to processing and molding the fifth lens and shortening the optical total length of the imaging system.

An axial distance SAG51 from the intersection point of the object-side surface of the fifth lens and the optical axis to the effective semi-aperture vertex of the object-side surface of the fifth lens, an axial distance SAG52 from the intersection point of the image-side surface of the fifth lens and the optical axis to the effective semi-aperture vertex of the image-side surface of the fifth lens, may satisfy 0.8 < SAG51/SAG52 < 1.8, and more specifically, the SAG51 and the SAG52 may further satisfy 0.95. Ltoreq. SAG51/SAG 52. Ltoreq.1.77. The lens meets the conditional expression that SAG51/SAG52 is more than 0.8 and less than 1.8, is beneficial to processing and forming the lens and is beneficial to miniaturization of the lens.

In application, the center thickness of each lens and the spacing distance between the lenses can be optimized to improve the optical performance of the lens.

The central thickness CT1 of the first lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis can satisfy 0.6 < CT1/CT4 < 1.1, and more specifically, CT1 and CT4 can further satisfy 0.65 < CT1/CT4 < 1.09. The conditional expression that CT1/CT4 is more than 0.6 and less than 1.1 is satisfied, which is beneficial to the dispersion of the focal power of the system, the processing and the forming of the lens and the reduction of the tolerance sensitivity of the imaging system.

The central thickness CT3 of the third lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis can satisfy 0.8 < CT3/CT5 < 1.2, and more specifically, CT3 and CT5 further satisfy 0.88 < CT3/CT5 < 1.16. The optical lens meets the conditional expression that CT3/CT5 is more than 0.8 and less than 1.2, and is favorable for reasonable distribution of space on an axis, thereby better balancing the two aspects of processing and forming of the lens and the optical total length of an imaging system, and ensuring that the lens has good processability and the shortest possible optical total length.

A distance T12 between the first lens and the second lens on the optical axis, a distance T23 between the second lens and the third lens on the optical axis, and a distance T34 between the third lens and the fourth lens on the optical axis may satisfy 0.1 < T34/(T12 + T23) < 0.5, and more specifically, T12, T23, and T34 may further satisfy 0.11 < T34/(T12 + T23) < 0.32. The condition that T34/(T12 + T23) < 0.5 is more than 0.1 is satisfied, and the lens assembly is facilitated, so that the production yield of the lens is improved, and the total optical length of the system is shortened.

f/EPD < 1.6 can be satisfied between the total effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens, and more specifically, f and EPD further satisfy 1.26 ≦ f/EPD ≦ 1.38. The condition f/EPD is less than 1.6, the image surface energy density on an imaging surface can be effectively improved, and the signal to noise ratio of an output signal of the image sensor is further improved, namely, the infrared imaging quality or the identification detection precision is improved.

Optionally, the camera lens may further include a filter, and the filter may be an infrared band-pass filter.

Alternatively, the above-described image pickup lens may further include a protective glass for protecting the photosensitive element on the image forming surface.

The imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the camera lens is more beneficial to production and processing and can be suitable for portable electronic products. Meanwhile, the camera lens with the configuration has the beneficial effects of large aperture, high imaging quality and the like, and can be well applied to the fields of infrared detection, identification and the like.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses constituting an imaging lens may 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, 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 along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an image plane S13.

The first lens element L1 has positive refractive power, the object-side surface S1 is a convex surface, the image-side surface S2 is a concave surface, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric surfaces. The first lens element L1 may be made of glass and has a thermal expansion coefficient TCE1=6.50 × 10 ^-6 /℃。

The second lens element L2 has positive refractive power, the object-side surface S3 is a convex surface, the image-side surface S4 is a concave surface, and both the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

The third lens element L3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6, wherein the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

The fourth lens element L4 has positive refractive power, the object-side surface S7 is a convex surface, the image-side surface S8 is a convex surface, and both the object-side surface S7 and the image-side surface S8 of the fourth lens element E4 are aspheric.

The fifth lens element L5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10, wherein the object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric.

Optionally, the imaging lens may further include a filter L6 having an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.

Alternatively, a stop STO may be provided between the object side and the first lens L1 to improve the imaging quality of the imaging lens.

Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 1, where the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 1

As can be seen from table 1, the radius of curvature R1 of the object-side surface S1 of the first lens L1 and the radius of curvature R2 of the image-side surface S2 of the first lens L1 satisfy (R1 + R2)/(R1-R2) = -4.48; a radius of curvature R8 of the image-side surface S8 of the fourth lens L4 and a radius of curvature R9 of the object-side surface S9 of the fifth lens L5 satisfy R8/R9=1.75; CT1/CT4=0.96 is satisfied between a central thickness CT1 of the first lens L1 on the optical axis and a central thickness CT4 of the fourth lens L4 on the optical axis; the central thickness CT3 of the third lens L3 on the optical axis and the central thickness CT5 of the fifth lens L5 on the optical axis satisfy CT3/CT5=1.03; T34/(T12 + T23) =0.27 is satisfied between a spacing distance T12 on the optical axis of the first lens L1 and the second lens L2, a spacing distance T23 on the optical axis of the second lens L2 and the third lens L3, and a spacing distance T34 on the optical axis of the third lens L3 and the fourth lens L4.

In the present embodiment, each aspherical surface type x is defined by the following formula:

wherein x is the distance rise from the vertex of the aspheric surface 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 =1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the coefficients A of the higher order terms which can be used for the aspherical mirror surfaces S1 to S10 in example 1 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ And A ₂₀ 。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

6.7023E-03

2.3208E-03

-1.7264E-03

2.6033E-04

1.0806E-04

-2.6534E-05

-1.0213E-05

0.0000E+00

S2

-1.3894E-04

-7.8632E-03

4.9290E-03

-2.4302E-03

2.0504E-04

0.0000E+00

S3

-8.3620E-03

-4.9907E-02

5.9183E-02

-5.1623E-02

2.3988E-02

-6.0692E-03

5.8357E-04

0.0000E+00

S4

-2.9484E-02

1.7080E-02

-3.2490E-02

2.2400E-02

-1.0689E-02

2.7910E-03

-3.0149E-04

0.0000E+00

S5

-1.1570E-01

1.2672E-01

-1.1433E-01

6.1601E-02

-1.8420E-02

2.0905E-03

0.0000E+00

S6

-1.5755E-01

7.7283E-02

8.3797E-03

-6.1712E-02

4.6558E-02

-1.5156E-02

1.7308E-03

1.3237E-04

-3.0833E-05

S7

-8.9066E-02

4.1769E-02

-3.2736E-02

1.7530E-02

-6.5927E-03

1.3509E-03

-1.0931E-04

0.0000E+00

S8

1.6309E-02

-2.0132E-03

1.5360E-04

8.3524E-05

1.4589E-05

-3.6784E-06

0.0000E+00

S9

2.1370E-02

7.3852E-04

-6.5440E-05

-1.2698E-05

8.2656E-07

0.0000E+00

S10

-3.8646E-03

2.3051E-03

-7.9045E-04

9.1052E-05

-4.7846E-06

9.5023E-08

0.0000E+00

TABLE 2

Table 3 below gives the total effective focal length f of the imaging lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens L1 to the imaging surface S13), and half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the imaging lens of embodiment 1.

TABLE 3

In embodiment 1, f1/f =1.74 is satisfied between the effective focal length f1 of the first lens L1 and the total effective focal length f of the imaging lens; the total optical length TTL of the camera lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the camera lens meet the condition that TTL/ImgH =1.39; the radius of curvature R9 of the object-side surface S9 of the fifth lens L5 and the total effective focal length f of the imaging lens satisfy R9/f = -0.38; r9/f5=0.52 is satisfied between a radius of curvature R9 of an object-side surface S9 of the fifth lens L5 and an effective focal length f5 of the fifth lens L5; f/EPD =1.30 is satisfied between the total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens; the effective half aperture DT52 of the image side surface S10 of the fifth lens L5 and the half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the imaging lens meet DT52/ImgH =0.85; SAG51/SAG52=1.01 is satisfied between an on-axis distance SAG51 from an intersection of the fifth lens L5 object-side surface S9 and the optical axis to an effective half-aperture vertex of the fifth lens L5 object-side surface S9 and an on-axis distance SAG52 from an intersection of the fifth lens L5 image-side surface S10 and the optical axis to an effective half-aperture vertex of the fifth lens L5 image-side surface S10.

Fig. 2A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the imaging lens of embodiment 1, which represents the distortion magnitude values in the case of different angles of view. Fig. 2D 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. As can be seen from fig. 2A to 2D, the imaging lens system 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, a description 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 imaging lens includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an image plane S13.

The first lens element L1 has positive refractive power, the object-side surface S1 is a convex surface, the image-side surface S2 is a concave surface, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric surfaces. The first lens L1 may be made of glass and has a thermal expansion coefficient TCE1=3.00 × 10 ^-6 /℃。

The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4, wherein the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

The third lens element L3 has negative refractive power, the object-side surface S5 is a convex surface, the image-side surface S6 is a concave surface, and both the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

The fifth lens element L5 has negative refractive power, the object-side surface S9 is a concave surface, the image-side surface S10 is a concave surface, and both the object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric surfaces.

Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 2, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 5 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 6 shows the total effective focal length f of the imaging lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the imaging lens, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the imaging lens in embodiment 2.

TABLE 4

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

6.5189E-03

3.1475E-03

-1.7389E-03

1.3535E-04

1.1388E-04

-2.6022E-06

-9.2316E-06

0.0000E+00

S2

3.3538E-03

-7.6042E-03

5.4054E-03

-2.1681E-03

2.0824E-04

0.0000E+00

S3

-3.1686E-03

-4.9523E-02

5.9290E-02

-5.0635E-02

2.4109E-02

-6.0651E-03

5.8357E-04

0.0000E+00

S4

-3.0532E-02

1.5141E-02

-1.9576E-02

1.0466E-02

-4.1370E-03

9.1558E-04

-8.4440E-05

0.0000E+00

S5

-8.9103E-02

8.1498E-02

-5.8791E-02

2.4212E-02

-5.8475E-03

5.6344E-04

0.0000E+00

S6

-1.0768E-01

6.9169E-03

6.0429E-02

-6.8698E-02

3.7333E-02

-1.1544E-02

2.0262E-03

-1.8421E-04

6.7776E-06

S7

-1.0115E-01

5.0621E-02

-3.3714E-02

1.4123E-02

-3.8113E-03

5.8188E-04

-3.7362E-05

0.0000E+00

S8

1.8898E-02

-2.7259E-03

5.9233E-05

7.7954E-05

1.5994E-05

-3.0056E-06

0.0000E+00

S9

1.8593E-02

1.0344E-03

-5.1294E-05

-1.2232E-05

7.8180E-07

0.0000E+00

S10

-7.1029E-03

2.3984E-03

-7.5319E-04

8.8979E-05

-4.8672E-06

1.0435E-07

0.0000E+00

TABLE 5

TABLE 6

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 astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the imaging lens of embodiment 2, which represents the distortion magnitude values in the case of different angles of view. Fig. 4D 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. 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 the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an image plane S13.

The first lens element L1 has positive refractive power, the object-side surface S1 is a convex surface, the image-side surface S2 is a concave surface, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric surfaces. The first lens element L1 may be made of glass and has a thermal expansion coefficient TCE1=0.50 × 10 ^-6 /℃。

The second lens element L2 has positive refractive power, the object-side surface S3 is convex, the image-side surface S4 is concave, and both the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

The fifth lens element L5 has negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10, wherein the object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric.

Optionally, the imaging lens may further include a filter L6 having an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 3, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 8 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 9 shows the total effective focal length f of the imaging lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the imaging lens, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the imaging lens in embodiment 3.

TABLE 7

TABLE 8

TABLE 9

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 an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the imaging lens of embodiment 3, which represents the distortion magnitude values in the case of different angles of view. Fig. 6D 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 surface after light passes through the lens. As can be seen from fig. 6A to 6D, the imaging lens 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 the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an image plane S13.

The first lens element L1 has positive refractive power, the object-side surface S1 is a convex surface, the image-side surface S2 is a concave surface, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric surfaces. The first lens L1 may be made of glass, and has a thermal expansion coefficient TCE1= -3.00 × 10 ^-6 /℃。

The second lens element L2 has positive refractive power, the object-side surface S3 is a convex surface, the image-side surface S4 is a convex surface, and both the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 4, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 11 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. Table 12 shows the total effective focal length f of the imaging lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the imaging lens, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the imaging lens in embodiment 4.

Watch 10

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-6.6359E-03

2.2875E-03

-2.7411E-03

7.7598E-04

-7.2832E-05

1.6791E-06

-9.3473E-06

0.0000E+00

S2

-3.9819E-04

2.7714E-03

-6.1401E-03

3.7480E-03

-1.0730E-03

0.0000E+00

S3

-1.8668E-02

-1.7575E-02

2.3595E-02

-3.1321E-02

1.9495E-02

-6.0733E-03

5.8139E-04

0.0000E+00

S4

-5.1407E-02

3.4958E-02

-3.6453E-02

1.5422E-02

-3.2602E-03

1.3344E-04

3.2435E-05

0.0000E+00

S5

-9.0619E-02

6.2510E-02

-3.5156E-02

1.1791E-02

-2.9736E-03

2.8392E-04

0.0000E+00

S6

-1.4831E-01

5.5418E-02

2.3494E-02

-6.6635E-02

5.4958E-02

-2.4255E-02

5.9338E-03

-7.4751E-04

3.7710E-05

S7

-5.0370E-02

-2.2222E-02

4.1881E-02

-3.4812E-02

1.4275E-02

-2.9437E-03

2.3943E-04

0.0000E+00

S8

4.5015E-02

-8.2903E-03

4.2215E-04

3.5802E-05

-2.6671E-05

4.0924E-06

0.0000E+00

S9

2.4595E-02

-4.8602E-05

1.2046E-04

-4.2983E-06

-2.8682E-07

0.0000E+00

S10

-1.5663E-02

4.5250E-03

-1.1757E-03

1.1989E-04

-5.1814E-06

8.2224E-08

0.0000E+00

TABLE 11

TABLE 12

Fig. 8A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 4, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Fig. 8B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the imaging lens of embodiment 4, which represents the distortion magnitude values in the case of different angles of view. Fig. 8D 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. 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 the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an image plane S13.

The first lens element L1 has positive focal power, the object-side surface S1 is convex, the image-side surface S2 is concave, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric. The first lens element L1 may be made of glass and has a thermal expansion coefficient TCE1=6.10 × 10 ^-6 /℃。

The third lens element L3 has negative refractive power, the object-side surface S5 is a concave surface, the image-side surface S6 is a concave surface, and both the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 5, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 14 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 15 shows the total effective focal length f of the imaging lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the imaging lens, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the imaging lens of embodiment 5.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

7.4481E-03

2.3695E-03

-1.7102E-03

2.7989E-04

1.0517E-04

-3.9246E-05

-1.0213E-05

0.0000E+00

S2

5.2190E-04

-7.0815E-03

4.6821E-03

-2.6817E-03

2.8967E-04

0.0000E+00

S3

-8.5768E-03

-5.2612E-02

5.9592E-02

-5.1104E-02

2.3818E-02

-6.0692E-03

5.8357E-04

0.0000E+00

S4

2.5316E-03

-2.7855E-02

7.1619E-03

1.1733E-03

-4.9855E-03

2.2091E-03

-3.0307E-04

0.0000E+00

S5

7.1424E-03

-1.7246E-02

5.1000E-04

7.9751E-03

-6.1490E-03

1.0345E-03

0.0000E+00

S6

-1.2877E-01

7.2443E-02

-1.9044E-02

-5.3087E-02

7.2132E-02

-4.2531E-02

1.3307E-02

-2.1615E-03

1.4634E-04

S7

-1.4253E-01

1.1735E-01

-1.2129E-01

7.6677E-02

-2.9575E-02

6.1109E-03

-5.1182E-04

0.0000E+00

S8

2.7654E-02

-3.9650E-03

2.3058E-04

1.6770E-04

2.2817E-05

-6.9303E-06

0.0000E+00

S9

2.1215E-02

6.2763E-04

-6.8766E-05

-1.1805E-05

8.1047E-07

0.0000E+00

S10

-3.1837E-03

1.8511E-03

-6.9582E-04

8.8200E-05

-5.0572E-06

1.0803E-07

0.0000E+00

TABLE 14

Watch 15

Fig. 10A shows on-axis chromatic aberration curves of the imaging lens of embodiment 5, which represent deviation of convergence focuses of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the imaging lens of embodiment 5, which represents the distortion magnitude values in the case of different angles of view. Fig. 10D 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 surface after light passes through the lens. 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 the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an image plane S13.

The first lens element L1 has positive refractive power, the object-side surface S1 is a convex surface, the image-side surface S2 is a concave surface, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric surfaces. The first lens L1 may be made of glass and has a thermal expansion coefficient TCE1=3.70 × 10 ^-6 /℃。

The second lens element L2 has positive refractive power, the object-side surface S3 is a concave surface, the image-side surface S4 is a convex surface, and both the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 6, where the units of the radius of curvature and the thickness are both millimeters (mm). Table 17 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 18 shows the total effective focal length f of the imaging lens, the effective focal lengths f1 to f5 of the respective lenses, the total optical length TTL of the imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the imaging lens of embodiment 6.

TABLE 16

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

7.3799E-03

2.4893E-03

-1.6861E-03

2.8000E-04

1.0910E-04

-3.6239E-05

-9.0662E-06

0.0000E+00

S2

9.4031E-04

-6.6069E-03

4.9252E-03

-2.6603E-03

2.5390E-04

0.0000E+00

S3

9.5265E-04

-9.5815E-02

1.3691E-01

-1.2618E-01

6.2684E-02

-1.5418E-02

1.2432E-03

0.0000E+00

S4

-4.5325E-03

-8.3016E-03

-2.3432E-02

2.3604E-02

-1.3308E-02

3.8596E-03

-4.5369E-04

0.0000E+00

S5

-2.3265E-02

4.4086E-02

-5.9364E-02

3.6741E-02

-1.2658E-02

1.5945E-03

0.0000E+00

S6

-1.9837E-01

2.8300E-01

-3.5992E-01

2.9724E-01

-1.6084E-01

5.7080E-02

-1.3074E-02

1.7694E-03

-1.0568E-04

S7

-1.4764E-01

1.5332E-01

-1.6266E-01

1.0060E-01

-3.6619E-02

7.0344E-03

-5.4492E-04

0.0000E+00

S8

2.9384E-02

-5.3307E-03

7.0251E-05

1.6645E-04

2.4458E-05

-6.7553E-06

0.0000E+00

S9

2.1522E-02

6.6265E-04

-6.3204E-05

-1.1279E-05

8.1851E-07

0.0000E+00

S10

1.5191E-03

1.1740E-03

-6.7346E-04

8.7332E-05

-5.0294E-06

1.2242E-07

0.0000E+00

TABLE 17

Watch 18

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

In summary, examples 1 to 6 each satisfy the relationship shown in table 19 below.

Watch 19

The present application also provides an image pickup apparatus, the electronic photosensitive element of which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The camera device can be a stand-alone camera device such as a digital camera, and can also be a camera module integrated on a mobile electronic device such as a mobile phone and a tablet computer. The image pickup apparatus is equipped with the image pickup lens described above.

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 image pickup lens sequentially comprises from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens,

the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;

the second lens has positive focal power or negative focal power;

the third lens has a negative optical power;

the fourth lens has positive focal power, and the image side surface of the fourth lens is a convex surface;

the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface;

the number of the lenses with focal power of the camera lens is five;

the effective half aperture DT52 of the image side surface of the fifth lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the camera lens meet the condition that DT52/ImgH is more than 0.75 and less than 1;

the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens meet the condition that (R1 + R2)/(R1-R2) < -3) is < -5; and

the total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens meet the condition that f/EPD is less than 1.6.

2. The imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the total effective focal length f of the imaging lens satisfy 1.4 < f1/f < 2.

3. The imaging lens system according to claim 1, wherein a radius of curvature R8 of the image-side surface of the fourth lens element and a radius of curvature R9 of the object-side surface of the fifth lens element satisfy 1.2 < R8/R9 < 3.5.

4. The imaging lens according to claim 1 or 3, wherein a radius of curvature R9 of the object-side surface of the fifth lens and an effective focal length f5 of the fifth lens satisfy 0 < R9/f5 < 0.8.

5. The imaging lens of claim 1 or 3, wherein the radius of curvature of the object-side surface of the fifth lens element R9 and the total effective focal length f of the imaging lens satisfy R9/f > -0.5.

6. The imaging lens assembly according to claim 1, wherein a central thickness CT1 of the first lens element on the optical axis and a central thickness CT4 of the fourth lens element on the optical axis satisfy 0.6 < CT1/CT4 < 1.1.

7. The imaging lens assembly according to claim 1, wherein a central thickness CT3 of the third lens element on the optical axis and a central thickness CT5 of the fifth lens element on the optical axis satisfy 0.8 < CT3/CT5 < 1.2.

8. The imaging lens according to claim 1, wherein a separation distance T12 on the optical axis between the first lens and the second lens, a separation distance T23 on the optical axis between the second lens and the third lens, and a separation distance T34 on the optical axis between the third lens and the fourth lens satisfy 0.1 < T34/(T12 + T23) < 0.5.

9. The imaging lens system according to claim 6 or 8, wherein an on-axis distance TTL from an object side surface of the first lens element to the imaging surface of the imaging lens system and a half ImgH of a diagonal length of an effective pixel region on the imaging surface of the imaging lens system satisfy TTL/ImgH < 1.6.

10. The imaging lens according to claim 1, wherein 0.8 < SAG51/SAG52 < 1.8 is satisfied,

SAG51 is the distance between the intersection point of the object side surface of the fifth lens and the optical axis and the effective semi-aperture vertex of the object side surface of the fifth lens on the optical axis; and

the SAG52 is a distance between an intersection point of the image side surface of the fifth lens and the optical axis and an effective semi-aperture vertex of the image side surface of the fifth lens on the optical axis.

11. The imaging lens according to claim 1, wherein the first lens is a glass lens, and has a thermal expansion coefficient TCE1 satisfying TCE1 < 15 × 10 ^-6 /℃。

12. The image pickup lens sequentially comprises from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens,

the second lens has positive power or negative power;

the third lens has a negative optical power;

the number of lenses of the camera lens with focal power is five;

the total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens meet the condition that f/EPD is less than 1.6;

the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the camera lens meet the condition that TTL/ImgH is less than 1.6; and

the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens meet the condition that-5 < (R1 + R2)/(R1-R2) < -3.

13. The camera lens of claim 12, wherein a central thickness CT1 of the first lens element on the optical axis and a central thickness CT4 of the fourth lens element on the optical axis satisfy 0.6 < CT1/CT4 < 1.1.

14. The imaging lens assembly of claim 12, wherein a central thickness CT3 of the third lens element on the optical axis and a central thickness CT5 of the fifth lens element on the optical axis satisfy 0.8 < CT3/CT5 < 1.2.

15. The imaging lens according to claim 12, wherein a separation distance T12 on the optical axis between the first lens and the second lens, a separation distance T23 on the optical axis between the second lens and the third lens, and a separation distance T34 on the optical axis between the third lens and the fourth lens satisfies 0.1 < T34/(T12 + T23) < 0.5.

16. The imaging lens assembly according to claim 12, wherein a radius of curvature R9 of the object-side surface of the fifth lens and an effective focal length f5 of the fifth lens satisfy 0 < R9/f5 < 0.8.

17. The image capture lens of claim 12, wherein the radius of curvature of the object-side surface of the fifth lens element R9 and the total effective focal length f of the image capture lens satisfy R9/f > -0.5.

18. An imaging lens according to any one of claims 12, 16, or 17, wherein a radius of curvature R8 of the image-side surface of the fourth lens and a radius of curvature R9 of the object-side surface of the fifth lens satisfy 1.2 < R8/R9 < 3.5.

19. The imaging lens of claim 12, wherein the effective focal length f1 of the first lens and the total effective focal length f of the imaging lens satisfy 1.4 < f1/f < 2.

20. The imaging lens system according to claim 12, wherein an effective half aperture DT52 of the image side surface of the fifth lens element and a half ImgH of a diagonal length of an effective pixel region on the imaging surface of the imaging lens system satisfy 0.75 < DT52/ImgH < 1.

21. The imaging lens according to claim 12 or 20, wherein 0.8 < SAG51/SAG52 < 1.8 is satisfied,

SAG52 is the distance between the intersection point of the image side surface of the fifth lens and the optical axis and the effective semi-caliber vertex of the image side surface of the fifth lens on the optical axis.

22. The imaging lens assembly according to claim 12, wherein the first lens is a glass lens, and a thermal expansion coefficient TCE1 of the glass lens assembly satisfies TCE1 < 15 x 10 ^-6 /℃。