WO2020134128A1 - Imaging lens assembly - Google Patents

Abstract

Disclosed is an imaging lens assembly, sequentially comprising from an object side to an image side along an optical axis: a first lens (E1), a second lens (E2), a third lens (E3), and a fourth lens (E4), wherein the first lens (E1) has a negative focal power and an object side surface (S1) thereof is a concave surface; the second lens (E2) has a positive or negative focal power; the third lens (E3) has a positive or negative focal power, an object side surface (S5) thereof is a convex surface, and an image side (S6) thereof is a concave surface; and the fourth lens (E4) has a positive focal power. An air interval is provided between any two adjacent lenses; and an effective focal length f1 of the first lens (E1) and an effective focal length f4 of the fourth lens (E4) satisfy -1.3 < (f4/f1) < 0.

Description

Imaging lens

Cross-reference of related applications

This application requires the priority and rights of the Chinese patent application with the patent application number 201811589365.7 filed on December 25, 2018 at the China National Intellectual Property Administration (CNIPA). This Chinese patent application is incorporated herein by reference in its entirety.

Technical field

The present application relates to an imaging lens, and more specifically, the present application relates to an imaging lens including four lenses.

Background technique

As people's pursuit of quality of life becomes higher and higher, portable electronic products are increasingly entering people's lives. This in turn requires that the imaging lens size of electronic products related to imaging, such as mobile phones and tablet computers, be as small as possible. At the same time, in order to achieve a wider field of view, it is expected that the angle of view of the imaging lens will become larger and larger. In order to meet the demand for miniaturization, it is necessary to reduce the number of lenses of the imaging lens as much as possible, but the resulting lack of design freedom will make it difficult to meet the market demand for high imaging performance.

Summary of the invention

According to an aspect of the present application, it provides an imaging lens including, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, and a fourth lens. The first lens may have negative power and the object side is concave; the second lens may have positive power or negative power; the third lens may have positive power or negative power and the object side is Convex, the image side is concave; and the fourth lens may have positive power. There is an air gap between each adjacent lens.

In an exemplary embodiment, the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens may satisfy -1.3<f4/f1<0.

In an exemplary embodiment, the effective focal length f of the imaging lens and the effective focal length f1 of the first lens may satisfy -1<f/f1<0.

In an exemplary embodiment, the effective focal length f of the imaging lens, the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the image side of the fourth lens may satisfy 0<f/|R7-R8|< 0.5.

In an exemplary embodiment, the center thickness CT1 of the first lens and the center thickness CT4 of the fourth lens may satisfy 0.5<CT4/CT1<1.5.

In an exemplary embodiment, the radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the image side of the third lens may satisfy 0<R6/R5<2.

In an exemplary embodiment, the effective focal length f of the imaging lens and the radius of curvature R1 of the object side of the first lens may satisfy 0.5<f/R1<1.5.

In an exemplary embodiment, the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT21 of the object side of the second lens may satisfy 0<DT31/DT21<0.8.

In an exemplary embodiment, the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT41 of the object side of the fourth lens may satisfy 1<DT41/DT31<2.5.

In an exemplary embodiment, the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens may satisfy 0<ET4/CT4<1.

In an exemplary embodiment, the air gap T23 between the second lens and the third lens on the optical axis and the air gap T34 between the third lens and the fourth lens on the optical axis may satisfy 0<T34/T23<0.5 .

In an exemplary embodiment, the effective focal length f of the imaging lens and the combined focal length f34 of the third lens and the fourth lens may satisfy 1<f34/f<2.5.

In an exemplary embodiment, the half of the maximum field angle of the imaging lens HFOV may be designed to be HFOV>45°.

The present application adopts a four-piece lens structure to provide a four-piece wide-angle lens, which can simultaneously meet the requirements of a large field of view and high image quality, and design with less design freedom can reduce production costs and assembly costs. The imaging lens according to the present application has characteristics such as a large angle of view, high imaging quality, and low sensitivity.

BRIEF DESCRIPTION

The principles of the present inventive concept will be explained by describing non-limiting embodiments of the present application with reference to the drawings. It should be understood that the drawings are intended to illustrate exemplary embodiments of the present application and not to limit it. Among them, the drawings are used to provide a further understanding of the inventive concept of the present application, and are incorporated into the specification to form a part of the specification. The same reference numerals in the drawings denote the same features. In the drawings:

1 shows a schematic structural diagram of an imaging lens according to Example 1 of the present application; FIGS. 2A to 2D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Example 1;

FIG. 3 shows a schematic structural diagram of an imaging lens according to Example 2 of the present application; FIGS. 4A to 4D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Example 2;

FIG. 5 shows a schematic structural diagram of an imaging lens according to Example 3 of the present application; FIGS. 6A to 6D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Example 3;

7 shows a schematic structural diagram of an imaging lens according to Example 4 of the present application; FIGS. 8A to 8D respectively show an on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the imaging lens of Example 4;

9 shows a schematic structural diagram of an imaging lens according to Example 5 of the present application; FIGS. 10A to 10D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Example 5;

11 shows a schematic structural diagram of an imaging lens according to Example 6 of the present application; FIGS. 12A to 12D respectively show an on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the imaging lens of Example 6;

13 shows a schematic structural diagram of an imaging lens according to Example 7 of the present application; FIGS. 14A to 14D respectively show an on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the imaging lens of Example 7;

15 shows a schematic structural diagram of an imaging lens according to Example 8 of the present application; FIGS. 16A to 16D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Example 8 respectively.

17 shows a schematic structural diagram of an imaging lens according to Example 9 of the present application; FIGS. 18A to 18D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Example 9 respectively.

19 shows a schematic structural diagram of an imaging lens according to Example 10 of the present application; FIGS. 20A to 20D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Example 10, respectively.

detailed description

In order to better understand the application, various aspects of the application will be described in more detail with reference to the drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. 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 of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Therefore, without departing from the teaching of this application, the first lens discussed below may also be referred to as a second lens or a third lens.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are only examples and are not strictly drawn to scale.

In this article, the paraxial region refers to the 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 at least in the paraxial region. Concave surface. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens.

It should also be understood that the terms "including", "including", "having", "including" and/or "including" when used in this specification indicate the presence of the stated features, elements and/or components , But does not exclude the presence or addition of one or more other features, elements, components, and/or combinations thereof. In addition, when an expression such as "at least one of" appears after the list of listed features, the entire listed feature is modified, rather than modifying individual elements in the list. In addition, when describing embodiments of the present application, use "may" to mean "one or more embodiments of the present application." Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having meanings consistent with their meaning in the context of related technologies, and will not be interpreted in an idealized or excessively formal sense unless This article clearly so limited.

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

The imaging lens according to the exemplary embodiment of the present application may include, for example, four lenses having optical power, that is, a first lens, a second lens, a third lens, and a fourth lens. The first lens to the fourth lens are sequentially arranged along the optical axis from the object side to the image side, and each adjacent lens may have an air gap.

In an exemplary embodiment, the first lens may have negative power and the object side is concave; the second lens may have positive power or negative power; the third lens may have positive power or negative power , The object side is convex and the image side is concave; and the fourth lens may have positive refractive power. There can be an air gap between adjacent lenses. Making the first lens have negative power is helpful to increase the angle of view, increase the angle of incidence of light, and also help to compress the position of the diaphragm, thereby reducing pupil aberration. For the second lens and the third lens, by appropriately selecting the optical power, the optical system can better correct the primary aberration, thereby making the system have good imaging quality and lower sensitivity. The system is easily processed by injection molding and assembled with a high yield.

In an exemplary embodiment, the image side of the second lens may be convex.

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

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression -1.3<f4/f1<0, where f1 is the effective focal length of the first lens and f4 is the effective focal length of the fourth lens. More specifically, between f1 and f4 may further satisfy −1.13≦f4/f1≦−0.19. By reasonably restricting the effective focal lengths of the fourth lens and the first lens, the astigmatism of the two can be balanced, so that the system has good imaging quality.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression -1<f/f1<0, where f is the effective focal length of the imaging lens and f1 is the effective focal length of the first lens. More specifically, between f and f1 can further satisfy -0.68≤f/f1≤-0.13. By controlling the negative power of the first lens in a reasonable range, it not only bears the negative power required by the system, but also makes its contribution to spherical aberration within a reasonably controllable range, ensuring subsequent optical lenses It can reasonably correct the positive spherical aberration of its contribution, so that the image quality of the field of view on the system axis is better guaranteed.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0<f/|R7-R8|<0.5, where f is the effective focal length of the imaging lens and R7 is the radius of curvature of the object side of the fourth lens, And R8 is the radius of curvature of the image side of the fourth lens. More specifically, f, R7, and R8 can further satisfy 0.09≤f/|R7-R8|≤0.34. By controlling the radius of curvature of the object side and the image side of the fourth lens within a reasonable range, the amount of astigmatism and spherical aberration can be controlled within a reasonable range, which in turn can balance the amount of astigmatism generated by the front and rear optical lenses The spherical aberration makes the system have good imaging quality.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0.5<CT4/CT1<1.5, where CT1 is the center thickness of the first lens and CT4 is the center thickness of the fourth lens. More specifically, between CT1 and CT4 can further satisfy 0.91≤CT4/CT1≤1.13. By reasonably constraining the center thickness of the first lens and the fourth lens, the distortion contribution rate of the first lens and the fourth lens can be adjusted, so that the final distortion of the system is controlled within a reasonable interval to meet the imaging requirements.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0<R6/R5<2, where R5 is the radius of curvature of the object side of the third lens and R6 is the radius of curvature of the image side of the third lens. More specifically, between R5 and R6 can further satisfy 0.56≤R6/R5≤1.36. By defining the ratio range of the curvature radius of the object side of the third lens and the curvature radius of the image side, the shape of the third lens can be effectively constrained, and thus the aberration contribution rate of the object side and the image side of the third lens can be effectively controlled, Therefore, the aberrations related to the aperture band of the system are effectively balanced, and the imaging quality of the system is effectively improved.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression -1<f/R1<0, where f is the effective focal length of the imaging lens and R1 is the radius of curvature of the object side of the first lens. More specifically, between f and R1 can further satisfy -0.85≤f/R1≤-0.16. By controlling the ratio of the curvature radius of the object side of the first lens to the effective focal length of the imaging system, the field curvature contribution of the object side of the first lens is within a reasonable range to balance the field curvature generated by the rear group lens.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0<DT31/DT21<0.8, where DT31 is the maximum effective radius of the object side of the third lens and DT21 is the maximum effective radius of the object side of the second lens radius. More specifically, between DT31 and DT21 can further satisfy 0.26≤DT31/DT21≤0.59. By controlling the maximum effective radius of the object side of the third lens and the second lens within a certain range, it is conducive to increasing the angle of view, increasing the angle of incidence of light, and also conducive to compressing the position of the diaphragm and reducing the pupil image difference. For the second lens and the third lens, through the selection of appropriate power, the optical system can better correct the primary aberration, ensure that the system has good imaging quality and lower sensitivity, and then the system is easier to injection processing and Assemble at a higher yield.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 1<DT41/DT31<2.5, where DT31 is the maximum effective radius of the object side of the third lens and DT41 is the maximum effective radius of the object side of the fourth lens radius. More specifically, between DT31 and DT41 can further satisfy 1.21≤DT41/DT31≤1.89. By controlling the ratio of the effective radius of the object side of the fourth lens to the effective radius of the object side of the third lens to a certain range, the deflection angle of the incident light of the system from the third lens to the fourth lens can be reduced, which can be reasonably Adjust the distribution of the light beam on the curved surface to reduce the sensitivity of the system.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0<ET4/CT4<1, where ET4 is the edge thickness of the fourth lens and CT4 is the center thickness of the fourth lens. More specifically, between ET4 and CT4 can further satisfy 0.32≤ET4/CT4≤0.57. By constraining the ratio of the edge thickness of the fourth lens to the center thickness, the ratio is within a reasonable range to ensure the structural feasibility and machinability of the system.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 0<T34/T23<0.5, where T23 is the air gap between the second lens and the third lens on the optical axis, and T34 is the third lens and the third lens The air gap of the four lenses on the optical axis. More specifically, between T23 and T34 can further satisfy 0.08≤T34/T23≤0.19. By constraining the air separation of the second lens and the third lens on the optical axis and the air separation of the third lens and the fourth lens on the optical axis, it is within a reasonable range, which can effectively ensure that the system is structurally feasible Sex.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression 1<f34/f<2.5, where f is the effective focal length of the imaging lens and f34 is the combined focal length of the third lens and the fourth lens. More specifically, between f and f34 can further satisfy 1.51≤f34/f≤1.94. By reasonably restricting the ratio range of the combined focal length of the third and fourth lenses to the effective focal length of the system, the third and fourth lenses can be combined as a group of optical components with reasonable positive power to have a negative The aberrations generated by the optical component group of optical power are balanced to obtain good imaging quality.

In an exemplary embodiment, the imaging lens of the present application may satisfy the conditional expression HFOV>45°, and HFOV is half of the maximum field angle of the imaging lens. More specifically, HFOV may be set to HFOV ≥ 62.2°. By controlling the angle of view of the imaging lens to be greater than the angle of view of the general lens, a wider field of view is achieved when imaging.

Optionally, the above imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element located on the imaging surface.

The imaging lens according to the above embodiments of the present application may employ multiple lenses, such as the four described above. By rationally allocating the power, surface shape, center thickness of each lens, and the axial spacing between each lens, etc., the size of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved , Making the imaging lens more conducive to production and processing and applicable to portable electronic products. At the same time, the imaging lens with the above configuration can have beneficial effects such as a large angle of view, high imaging quality, and low sensitivity.

In the embodiments of the present application, at least one of the mirror surfaces of each lens is an aspheric mirror surface, that is, in the object side and the image side of each of the first lens, the second lens, the third lens, and the fourth lens At least one of them is an aspheric mirror. The characteristic of aspheric lenses is that the curvature changes continuously from the lens center to the lens periphery. Unlike spherical lenses, which have a constant curvature from the center of the lens to the periphery of the lens, aspheric lenses have better curvature radius characteristics, and have the advantages of improving distortion aberrations and improving astigmatic aberrations. With the use of aspheric lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, the object side and the image side of each of the first lens, the second lens, the third lens, and the fourth lens are aspherical mirror surfaces.

However, those skilled in the art should understand that, without departing from the technical solution claimed in this application, the number of lenses constituting the imaging lens can be changed to obtain various results and advantages described in this specification. For example, although the embodiment has been described with four lenses as an example, the imaging lens is not limited to include four lenses. If desired, the imaging lens may also include other numbers of lenses. Specific examples of the imaging lens applicable to the above-mentioned embodiment will be further described below with reference to the drawings.

Example 1

The imaging lens according to Embodiment 1 of the present application will be described below with reference to FIGS. 1 to 2D. FIG. 1 shows a schematic structural diagram of an imaging lens according to Embodiment 1 of the present application.

As shown in FIG. 1, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth The lens E4, the filter E5, and the imaging surface S11.

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

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

Table 1

As can be seen from Table 1, the object side and the image side of any one of the first lens E1 to the fourth lens E4 are aspherical. In this embodiment, the surface type x of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

Where x is the distance from the apex of the aspheric surface to the height of the aspheric surface at the height h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1/R (that is, the paraxial curvature c is the above table 1 is the reciprocal of the radius of curvature R); k is the conic coefficient (given in Table 1); Ai is the correction coefficient for the i-th order of the aspheric surface. Table 2 below shows the high-order coefficients A ₄ , A ₆ , A ₈ , A ₁₀ , A ₁₂ , A ₁₄ , A ₁₆ , A ₁₈ and A ₂₀ that can be used for each aspherical mirror surface S1-S8 in Example 1. .

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	4.2918E-01	-3.7033E-01	2.3920E-01	-1.1151E-01	3.6617E-02	-8.2366E-03	1.2070E-03	-1.0382E-04	3.9781E-06
S2	3.3299E-01	-1.6904E+00	1.2832E+01	-4.5788E+01	9.1822E+01	-1.0985E+02	7.6906E+01	-2.8982E+01	4.5398E+00
S3	-3.6845E-01	1.4527E+00	-6.5162E+00	1.7611E+01	-2.9408E+01	2.7162E+01	-1.1541E+01	7.4537E-01	5.8321E-01
S4	-1.7186E-01	-4.4501E-02	8.0457E+00	-8.2085E+01	4.0869E+02	-1.1714E+03	1.9802E+03	-1.8435E+03	7.3344E+02
S5	-9.1963E-01	8.9467E+00	-1.1024E+02	8.3241E+02	-1.6444E+03	-3.1351E+04	2.9688E+05	-1.0644E+06	1.4227E+06
S6	-2.3880E+00	2.5043E+01	-2.5635E+02	1.9394E+03	-9.9585E+03	3.3268E+04	-6.9826E+04	8.4520E+04	-4.5430E+04
S7	-2.1396E+00	2.2155E+01	-2.0293E+02	1.3889E+03	-6.2769E+03	1.8227E+04	-3.2959E+04	3.3957E+04	-1.5272E+04
S8	-4.0389E-01	1.5314E+01	-1.9638E+02	1.5227E+03	-7.2101E+03	2.1126E+04	-3.7205E+04	3.6045E+04	-1.4765E+04

Table 2

Table 3 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 1 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-1.17
TTL(mm)	4.60	f2(mm)	1.88
HFOV(°)	62.8	f3(mm)	-4.74
Fno	2.07	f4(mm)	1.12
f(mm)	0.80

table 3

FIG. 2A shows the on-axis chromatic aberration curve of the imaging lens of Example 1, which indicates that rays of different wavelengths will deviate from the focus point after passing through the optical system. 2B shows the astigmatism curve of the imaging lens of Example 1, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 2C shows the distortion curve of the imaging lens of Example 1, which represents the distortion magnitude values corresponding to different image heights. 2D shows the chromatic aberration of magnification of the imaging lens of Example 1, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be seen from FIGS. 2A to 2D that the imaging lens provided in Embodiment 1 can achieve good imaging quality.

Example 2

The imaging lens according to Embodiment 2 of the present application will be described below with reference to FIGS. 3 to 4D. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those of Embodiment 1 will be omitted. FIG. 3 shows a schematic structural diagram of an imaging lens according to Embodiment 2 of the present application.

As shown in FIG. 3, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and the image side surface S2 is concave. The second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 2, wherein the units of radius of curvature and thickness are both millimeters (mm).

Table 4

As can be seen from Table 4, in Example 2, the object side and the image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 5 shows the higher-order coefficients that can be used for each aspherical mirror surface in Example 2, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	5.1244E-01	-4.7018E-01	3.2771E-01	-1.6661E-01	5.9734E-02	-1.4635E-02	2.3290E-03	-2.1674E-04	8.9360E-06
S2	4.7215E-01	-2.1598E+00	1.7379E+01	-6.7044E+01	1.4873E+02	-1.9936E+02	1.5790E+02	-6.7809E+01	1.2158E+01
S3	-3.7375E-01	1.9965E+00	-9.6032E+00	3.1179E+01	-6.5441E+01	8.3033E+01	-6.0388E+01	2.2696E+01	-3.2868E+00
S4	-1.9452E-01	1.4398E+00	-7.0299E+00	1.7567E+01	-2.0904E+01	1.0203E+00	2.9505E+01	-3.4775E+01	1.3646E+01
S5	-5.7904E-01	7.0651E+00	-2.5409E+02	5.4994E+03	-8.1920E+04	8.2561E+05	-5.4056E+06	2.0510E+07	-3.3759E+07
S6	1.8830E-03	-1.8404E+01	5.1419E+02	-7.4461E+03	6.6312E+04	-3.7312E+05	1.2772E+06	-2.4122E+06	1.9173E+06
S7	-1.2492E-01	6.9644E-01	2.1300E+01	3.9682E+02	-6.2757E+03	3.5970E+04	-1.0705E+05	1.6719E+05	-1.0942E+05
S8	1.5312E-01	4.2865E+00	-5.0290E+01	5.3988E+02	-3.7884E+03	1.7437E+04	-4.8944E+04	7.6593E+04	-5.1299E+04

table 5

Table 6 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 2 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-1.28
TTL(mm)	4.48	f2(mm)	2.19
HFOV(°)	63.3	f3(mm)	500.02
Fno	2.07	f4(mm)	1.27
f(mm)	0.77

Table 6

FIG. 4A shows an on-axis chromatic aberration curve of the imaging lens of Example 2, which indicates that rays of different wavelengths will deviate from the focus point after passing through the optical system. 4B shows the astigmatism curve of the imaging lens of Example 2, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 4C shows the distortion curve of the imaging lens of Example 2, which represents the distortion magnitude values corresponding to different image heights. FIG. 4D shows the magnification chromatic aberration curve of the imaging lens of Example 2, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be seen from FIGS. 4A to 4D that the imaging lens provided in Embodiment 2 can achieve good imaging quality.

Example 3

The imaging lens according to Embodiment 3 of the present application will be described below with reference to FIGS. 5 to 6D. FIG. 5 shows a schematic structural diagram of an imaging lens according to Embodiment 3 of the present application.

As shown in FIG. 5, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, an aperture STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and its image side surface S2 is convex. The second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 3, in which the units of radius of curvature and thickness are both millimeters (mm).

Table 7

As can be seen from Table 7, in Example 3, the object side and the image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 8 shows the high-order coefficients that can be used for each aspherical mirror surface in Example 3, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	8.2689E-01	-8.3894E-01	6.2277E-01	-3.3024E-01	1.2151E-01	-3.0103E-02	4.7747E-03	-4.3691E-04	1.7507E-05
S2	8.6701E-01	-9.2032E-01	6.0601E+00	-2.1252E+01	4.0939E+01	-4.7288E+01	3.2107E+01	-1.1733E+01	1.7765E+00
S3	1.2122E-01	5.0307E-01	-4.1701E+00	1.3932E+01	-2.8213E+01	3.3997E+01	-2.3569E+01	8.6696E+00	-1.3094E+00
S4	9.2060E-02	6.2025E-03	-2.4927E+00	9.4618E+00	-1.8044E+01	2.0000E+01	-1.2500E+01	3.7742E+00	-3.2706E-01
S5	-9.6083E-01	7.8240E+00	-2.1918E+02	3.2243E+03	-3.4327E+04	2.6065E+05	-1.3394E+06	4.2122E+06	-6.1039E+06
S6	-5.6294E-01	-8.4153E+00	3.1903E+02	-5.2414E+03	4.6815E+04	-2.5107E+05	8.0564E+05	-1.4243E+06	1.0638E+06
S7	2.5627E-01	-3.0464E+00	1.6401E+02	-1.6943E+03	8.5752E+03	-2.3409E+04	3.0710E+04	-6.8452E+03	-1.6457E+04
S8	4.7452E-01	-5.2668E+00	1.3071E+02	-1.5325E+03	1.1577E+04	-5.4660E+04	1.5623E+05	-2.4185E+05	1.5277E+05

Table 8

Table 9 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 3 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-2.06
TTL(mm)	4.60	f2(mm)	4.03
HFOV(°)	62.2	f3(mm)	-16.65
Fno	2.07	f4(mm)	1.14
f(mm)	0.80

Table 9

6A shows an on-axis chromatic aberration curve of the imaging lens of Example 3, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical system. 6B shows the astigmatism curve of the imaging lens of Example 3, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 6C shows the distortion curve of the imaging lens of Example 3, which represents the distortion magnitude values corresponding to different image heights. 6D shows the magnification chromatic aberration curve of the imaging lens of Example 3, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be seen from FIGS. 6A to 6D that the imaging lens provided in Embodiment 3 can achieve good imaging quality.

Example 4

The imaging lens according to Embodiment 4 of the present application will be described below with reference to FIGS. 7 to 8D. 7 shows a schematic structural diagram of an imaging lens according to Embodiment 4 of the present application.

As shown in FIG. 7, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and the image side surface S2 is concave. The second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 4, wherein the units of radius of curvature and thickness are both millimeters (mm).

Table 10

As can be seen from Table 10, in Example 4, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 11 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 4, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	3.8252E-01	-3.0336E-01	1.8278E-01	-7.9469E-02	2.4040E-02	-4.9122E-03	6.4522E-04	-4.9044E-05	1.6347E-06
S2	3.5869E-01	-2.1615E+00	1.5446E+01	-5.5158E+01	1.1482E+02	-1.4435E+02	1.0680E+02	-4.2746E+01	7.1543E+00
S3	-2.9104E-01	8.0435E-01	-3.2190E+00	9.1105E+00	-1.7112E+01	1.8408E+01	-1.0219E+01	2.3677E+00	-6.1141E-02
S4	-1.9771E-01	1.2326E+00	-7.7974E+00	3.0170E+01	-7.0458E+01	9.8945E+01	-7.9329E+01	3.2467E+01	-5.0189E+00
S5	-9.8229E-01	1.9053E+01	-5.0264E+02	7.4349E+03	-6.5466E+04	3.3055E+05	-8.3147E+05	5.3471E+05	9.1856E+05
S6	-1.0036E+00	1.4272E+00	1.8307E+02	-4.2002E+03	4.3927E+04	-2.6176E+05	9.0918E+05	-1.7133E+06	1.3517E+06
S7	-4.5584E-01	7.7055E+00	-6.1083E+00	-2.3285E+02	1.1405E+03	5.2368E+02	-1.8884E+04	5.5568E+04	-5.3457E+04
S8	3.8195E-01	1.6664E+00	-1.5054E+01	2.9323E+02	-2.4901E+03	1.2384E+04	-3.5512E+04	5.5480E+04	-3.7375E+04

Table 11

Table 12 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 4 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV, and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-1.25
TTL(mm)	4.60	f2(mm)	2.17
HFOV(°)	65.5	f3(mm)	-11.48
Fno	2.07	f4(mm)	1.12
f(mm)	0.69

Table 12

FIG. 8A shows an on-axis chromatic aberration curve of the imaging lens of Example 4, which indicates that rays of different wavelengths will deviate from the focus point after passing through the optical system. 8B shows the astigmatism curve of the imaging lens of Example 4, which represents meridional image plane curvature and sagittal image plane curvature. 8C shows the distortion curve of the imaging lens of Example 4, which represents the distortion magnitude values corresponding to different image heights. 8D shows the magnification chromatic aberration curve of the imaging lens of Example 4, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. As can be seen from FIGS. 8A to 8D, the imaging lens provided in Example 4 can achieve good imaging quality.

Example 5

The imaging lens according to Embodiment 5 of the present application will be described below with reference to FIGS. 9 to 10D. 9 shows a schematic structural diagram of an imaging lens according to Embodiment 5 of the present application.

As shown in FIG. 9, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and the image side surface S2 is concave. The second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 5, wherein the units of radius of curvature and thickness are both millimeters (mm).

Table 13

It can be seen from Table 13 that in Example 5, the object side and the image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 14 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 5, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	2.7013E-01	-1.8232E-01	9.3968E-02	-3.5507E-02	9.3933E-03	-1.6777E-03	1.9208E-04	-1.2669E-05	3.6417E-07
S2	3.1540E-01	-2.3871E+00	1.4381E+01	-4.6107E+01	8.8681E+01	-1.0501E+02	7.3805E+01	-2.8105E+01	4.4580E+00
S3	-2.3444E-01	3.0466E-01	-5.0203E-01	-1.5079E-01	2.4636E+00	-6.8009E+00	8.9761E+00	-5.5812E+00	1.3209E+00
S4	-1.2974E-01	5.8218E-01	-3.2395E+00	1.0935E+01	-2.0370E+01	1.7958E+01	-6.2742E-01	-9.4736E+00	4.3788E+00
S5	-7.4284E-01	1.1541E+01	-1.9632E+02	4.4297E+02	2.6318E+04	-3.8715E+05	2.4743E+06	-7.7569E+06	9.6961E+06
S6	4.1279E-02	-1.7576E+01	5.1674E+02	-7.9796E+03	7.1154E+04	-3.8642E+05	1.2615E+06	-2.2749E+06	1.7395E+06
S7	3.3580E-01	-4.8114E+00	1.9011E+02	-2.1359E+03	1.2810E+04	-4.5310E+04	9.2603E+04	-9.6367E+04	3.4332E+04
S8	2.9474E-01	3.3160E+00	-1.6190E+01	5.5195E+01	5.4718E+02	-5.5814E+03	2.1400E+04	-3.7124E+04	2.3109E+04

Table 14

Table 15 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 5 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-1.26
TTL(mm)	4.60	f2(mm)	2.15
HFOV(°)	65.6	f3(mm)	200.48
Fno	2.07	f4(mm)	1.23
f(mm)	0.70

Table 15

FIG. 10A shows the on-axis chromatic aberration curve of the imaging lens of Example 5, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical system. 10B shows the astigmatism curve of the imaging lens of Example 5, which represents meridional image plane curvature and sagittal image plane curvature. 10C shows the distortion curve of the imaging lens of Example 5, which represents the distortion magnitude values corresponding to different image heights. FIG. 10D shows the magnification chromatic aberration curve of the imaging lens of Example 5, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be seen from FIGS. 10A to 10D that the imaging lens provided in Example 5 can achieve good imaging quality.

Example 6

The imaging lens according to Embodiment 6 of the present application will be described below with reference to FIGS. 11 to 12D. FIG. 11 shows a schematic structural diagram of an imaging lens according to Embodiment 6 of the present application.

As shown in FIG. 11, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and the image side surface S2 is concave. The second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 6, wherein the units of radius of curvature and thickness are both millimeters (mm).

Table 16

It can be seen from Table 16 that in Example 6, the object side and the image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 17 shows the high-order coefficients that can be used for each aspherical mirror surface in Example 6, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	1.2541E-01	-2.7428E-02	-2.3397E-02	2.4582E-02	-1.1315E-02	3.1064E-03	-5.2297E-04	4.9978E-05	-2.0765E-06
S2	2.7679E-01	-2.6531E+00	1.5566E+01	-3.9704E+01	5.0885E+01	-3.7080E+01	1.6846E+01	-5.2075E+00	9.4140E-01
S3	-2.6079E-01	-5.7097E-01	5.0836E+00	-2.5688E+01	5.8627E+01	-7.0522E+01	4.5626E+01	-1.4133E+01	1.2987E+00
S4	-5.1813E-02	-9.8977E-01	7.0833E+00	-2.1106E+01	2.0101E+01	5.8492E+01	-2.1514E+02	2.7481E+02	-1.3172E+02
S5	-2.1146E+00	1.4668E+02	-8.7958E+03	3.4216E+05	-8.6599E+06	1.4220E+08	-1.4657E+09	8.6339E+09	-2.2185E+10
S6	-3.8122E+00	7.3930E+01	-1.1300E+03	9.7335E+03	-1.2891E+04	-5.9301E+05	5.9368E+06	-2.4305E+07	3.8058E+07
S7	-4.3005E+00	6.8721E+01	-1.0384E+03	1.2375E+04	-1.0165E+05	5.6014E+05	-1.9769E+06	4.0192E+06	-3.5659E+06
S8	1.7932E-01	1.2485E+01	-2.6597E+02	3.5383E+03	-2.7289E+04	1.2768E+05	-3.5496E+05	5.4045E+05	-3.4796E+05

Table 17

Table 18 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 6 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-0.91
TTL(mm)	3.77	f2(mm)	1.40
HFOV(°)	70.0	f3(mm)	200.58
Fno	2.07	f4(mm)	0.98

f(mm)

0.56

Table 18

FIG. 12A shows an on-axis chromatic aberration curve of the imaging lens of Example 6, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical system. 12B shows the astigmatism curve of the imaging lens of Example 6, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 12C shows the distortion curve of the imaging lens of Example 6, which represents the distortion magnitude values corresponding to different image heights. FIG. 12D shows the magnification chromatic aberration curve of the imaging lens of Example 6, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be seen from FIGS. 12A to 12D that the imaging lens provided in Example 6 can achieve good imaging quality.

Example 7

The imaging lens according to Embodiment 7 of the present application is described below with reference to FIGS. 13 to 14D. 13 shows a schematic structural diagram of an imaging lens according to Example 7 of the present application.

As shown in FIG. 13, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and its image side surface S2 is convex. The second lens E2 has negative refractive power, and its object side surface S3 is concave and the image side surface S4 is convex. The third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 7, wherein the units of radius of curvature and thickness are both millimeters (mm).

Table 19

As can be seen from Table 19, in Example 7, the object side and the image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 20 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 7, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	1.1800E+00	-1.4259E+00	1.1531E+00	-6.4471E-01	2.4983E-01	-6.5815E-02	1.1229E-02	-1.1168E-03	4.9070E-05
S2	1.9895E+00	-4.1042E-01	1.1612E+01	-5.9979E+01	1.1754E+02	-1.2118E+02	7.0204E+01	-2.1670E+01	2.7770E+00
S3	3.5162E+00	-1.3817E+01	4.9397E+01	-1.3332E+02	2.3147E+02	-2.4657E+02	1.5542E+02	-5.3092E+01	7.5550E+00

S4	2.7888E+00	-1.7473E+01	7.4325E+01	-2.2664E+02	4.8710E+02	-7.0029E+02	6.3149E+02	-3.2096E+02	6.9954E+01
S5	-7.1970E-01	-2.6091E+01	1.1268E+03	-3.3252E+04	5.9432E+05	-5.9798E+06	2.7429E+07	6.1769E+06	-3.5179E+08
S6	-2.0949E+00	7.2394E+01	-1.7863E+03	2.7339E+04	-2.7485E+05	1.7889E+06	-7.2596E+06	1.6672E+07	-1.6550E+07
S7	-2.0645E+00	5.3474E+01	-6.2000E+02	6.2219E+03	-4.9226E+04	2.7212E+05	-9.6728E+05	1.9815E+06	-1.7828E+06
S8	7.2092E-01	-2.3334E+01	5.8166E+02	-7.9923E+03	6.9244E+04	-3.6816E+05	1.1858E+06	-2.1259E+06	1.6158E+06

Table 20

Table 21 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 7 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV, and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-4.23
TTL(mm)	3.47	f2(mm)	-151.26
HFOV(°)	71.1	f3(mm)	7.13
Fno	2.06	f4(mm)	0.80
f(mm)	0.53

Table 21

FIG. 14A shows an on-axis chromatic aberration curve of the imaging lens of Example 7, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical system. 14B shows the astigmatism curve of the imaging lens of Example 7, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 14C shows the distortion curve of the imaging lens of Example 7, which represents the distortion magnitude values corresponding to different image heights. 14D shows the magnification chromatic aberration curve of the imaging lens of Example 7, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be seen from FIGS. 14A to 14D that the imaging lens provided in Example 7 can achieve good imaging quality.

Example 8

The imaging lens according to Embodiment 8 of the present application will be described below with reference to FIGS. 15 to 16D. 15 shows a schematic structural diagram of an imaging lens according to Embodiment 8 of the present application.

As shown in FIG. 15, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, an aperture STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and the image side surface S2 is concave. The second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 8, wherein the units of radius of curvature and thickness are both millimeters (mm).

Table 22

As can be seen from Table 22, in Example 8, the object side and the image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 23 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 8, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	2.3414E-01	-1.6219E-01	8.8396E-02	-3.6898E-02	1.1449E-02	-2.4916E-03	3.5195E-04	-2.8480E-05	9.9038E-07
S2	3.0323E-01	-2.1588E+00	1.4249E+01	-3.9246E+01	4.8493E+01	-2.6091E+01	1.2131E+00	4.2859E+00	-1.2139E+00
S3	-2.3459E-01	6.9435E-03	1.8638E+00	-1.7951E+01	4.9643E+01	-6.5541E+01	4.5494E+01	-1.5522E+01	1.8801E+00
S4	-5.3458E-02	-1.8875E+00	2.6829E+01	-1.8475E+02	7.7272E+02	-2.0356E+03	3.2952E+03	-2.9913E+03	1.1636E+03
S5	-1.0309E+00	2.8292E+01	-5.8078E+02	5.7642E+03	-1.2156E+02	-4.5277E+05	3.4791E+06	-1.0653E+07	1.1993E+07
S6	-5.4938E+00	1.0824E+02	-1.7780E+03	2.0633E+04	-1.6560E+05	9.1768E+05	-3.4169E+06	7.8738E+06	-8.6231E+06
S7	-5.9840E+00	7.9164E+01	-8.7932E+02	6.9535E+03	-3.7581E+04	1.3643E+05	-3.1805E+05	4.2966E+05	-2.5559E+05
S8	6.2553E-01	-5.0772E+00	5.8611E+01	-1.8571E+02	-5.5535E+02	6.3985E+03	-2.0934E+04	3.1276E+04	-1.8205E+04

Table 23

Table 24 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 8 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV, and the aperture number Fno.

ImgH(mm)	1.20	f1(mm)	-0.83
TTL(mm)	3.64	f2(mm)	1.23
HFOV(°)	69.0	f3(mm)	-20.11
Fno	2.07	f4(mm)	0.93
f(mm)	0.52

Table 24

16A shows an on-axis chromatic aberration curve of the imaging lens of Example 8, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical system. 16B shows the astigmatism curve of the imaging lens of Example 8, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 16C shows the distortion curve of the imaging lens of Example 8, which represents the distortion magnitude values corresponding to different image heights. 16D shows the magnification chromatic aberration curve of the imaging lens of Example 8, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be seen from FIGS. 16A to 16D that the imaging lens provided in Example 8 can achieve good imaging quality.

Example 9

The imaging lens according to Embodiment 9 of the present application will be described below with reference to FIGS. 17 to 18D. FIG. 17 shows a schematic structural diagram of an imaging lens according to Embodiment 9 of the present application.

As shown in FIG. 17, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and the image side surface S2 is concave. The second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 9, wherein the units of radius of curvature and thickness are both millimeters (mm).

Table 25

As can be seen from Table 25, in Example 9, the object side and image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 26 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 9, wherein each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	2.4207E-01	-1.5551E-01	7.2955E-02	-2.4322E-02	5.6895E-03	-8.7611E-04	7.7437E-05	-2.6148E-06	-4.1901E-08
S2	3.1665E-01	-1.8550E+00	1.3681E+01	-4.1561E+01	6.4309E+01	-5.9741E+01	3.5439E+01	-1.2840E+01	2.1872E+00
S3	-3.4531E-01	4.6939E-01	-1.9400E+00	1.4244E+00	-9.2254E+00	3.9780E+01	-6.6237E+01	4.9910E+01	-1.4522E+01
S4	-7.8726E-02	-1.0774E+00	8.8396E+00	-3.5164E+01	8.5729E+01	-1.2807E+02	1.0395E+02	-2.8080E+01	-8.7191E+00
S5	-1.8380E+00	1.0515E+02	-5.2751E+03	1.6614E+05	-3.2632E+06	3.9666E+07	-2.8780E+08	1.1336E+09	-1.8557E+09
S6	-4.0534E+00	8.4774E+01	-1.7282E+03	2.6274E+04	-2.7973E+05	2.0382E+06	-9.6189E+06	2.6283E+07	-3.1436E+07
S7	-4.3355E+00	5.7762E+01	-7.4939E+02	7.2254E+03	-4.6434E+04	2.0164E+05	-5.7804E+05	9.8600E+05	-7.5152E+05
S8	1.2629E-01	9.0598E+00	-1.8198E+02	2.1896E+03	-1.5186E+04	6.3323E+04	-1.5561E+05	2.0837E+05	-1.1775E+05

Table 26

Table 27 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 9 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-0.91
TTL(mm)	3.77	f2(mm)	1.37
HFOV(°)	69.3	f3(mm)	200.00
Fno	2.07	f4(mm)	1.01
f(mm)	0.58

Table 27

FIG. 18A shows the on-axis chromatic aberration curve of the imaging lens of Example 9, which indicates that rays of different wavelengths will deviate from the focus point after passing through the optical system. 18B shows the astigmatism curve of the imaging lens of Example 9, which represents meridional image plane curvature and sagittal image plane curvature. 18C shows the distortion curve of the imaging lens of Example 9, which represents the distortion magnitude values corresponding to different image heights. 18D shows the magnification chromatic aberration curve of the imaging lens of Example 9, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be known from FIGS. 18A to 18D that the imaging lens provided in Example 9 can achieve good imaging quality.

Example 10

The imaging lens according to Embodiment 10 of the present application will be described below with reference to FIGS. 19 to 20D. FIG. 19 shows a schematic structural diagram of an imaging lens according to Embodiment 10 of the present application.

As shown in FIG. 19, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a Four lenses E4, filter E5 and imaging plane S11.

The first lens E1 has negative refractive power, and its object side surface S1 is concave and the image side surface S2 is concave. The second lens E2 has positive refractive power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has positive refractive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive refractive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the surfaces S1 to S10 and is finally imaged on the imaging surface S11. Table 28 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 10, where the units of radius of curvature and thickness are both millimeters (mm).

Table 28

As can be seen from Table 28, in Example 10, the object side and the image side of any one of the first lens E1 to the fourth lens E4 are aspherical. Table 29 shows the coefficients of higher order that can be used for each aspherical mirror surface in Example 10, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	2.7413E-01	-1.9347E-01	1.0306E-01	-4.0261E-02	1.1495E-02	-2.3121E-03	3.0896E-04	-2.4603E-05	8.9514E-07
S2	3.3275E-01	-1.3947E+00	1.1234E+01	-3.5042E+01	5.3350E+01	-4.7610E+01	2.6849E+01	-9.3156E+00	1.5498E+00
S3	-3.4547E-01	6.2985E-01	-2.7466E+00	3.5785E+00	-1.1996E+01	3.9335E+01	-6.0153E+01	4.3068E+01	-1.2012E+01
S4	-3.9504E-02	-1.6326E+00	1.4825E+01	-7.5123E+01	2.5092E+02	-5.5208E+02	7.6162E+02	-5.9295E+02	1.9778E+02
S5	-1.0630E+00	2.3401E+01	-4.9470E+02	6.9374E+03	-6.0747E+04	3.1902E+05	-9.7425E+05	1.5957E+06	-1.0846E+06
S6	-4.0142E+00	6.9998E+01	-1.0230E+03	8.7634E+03	-1.8825E+04	-3.1793E+05	3.0642E+06	-1.1298E+07	1.5835E+07
S7	-4.7856E+00	6.1660E+01	-7.9357E+02	7.1265E+03	-3.7564E+04	1.1943E+05	-2.4701E+05	3.6152E+05	-3.0976E+05
S8	4.1533E-02	1.0513E+01	-2.2877E+02	2.8479E+03	-2.0392E+04	8.7540E+04	-2.2092E+05	3.0324E+05	-1.7537E+05

Table 29

Table 30 shows the effective focal lengths f1 to f4, total effective focal length f, and total optical length TTL of each lens of the imaging lens in Example 10 (that is, the optical axis of the object side S1 to the imaging plane S11 of the first lens E1 Distance), the effective pixel area on the imaging surface S11 of the imaging lens is half the diagonal length of ImgH, the maximum half angle of view HFOV and the aperture number Fno.

ImgH(mm)	1.35	f1(mm)	-0.92
TTL(mm)	3.79	f2(mm)	1.37
HFOV(°)	69.3	f3(mm)	38.28
Fno	2.07	f4(mm)	1.03
f(mm)	0.58

Table 30

FIG. 20A shows an on-axis chromatic aberration curve of the imaging lens of Example 10, which indicates that rays of different wavelengths will deviate from the focal point after passing through the optical system. 20B shows the astigmatism curve of the imaging lens of Example 10, which represents meridional image plane curvature and sagittal image plane curvature. FIG. 20C shows the distortion curve of the imaging lens of Example 10, which represents the distortion magnitude values corresponding to different image heights. FIG. 20D shows the magnification chromatic aberration curve of the imaging lens of Example 10, which represents the deviation of different image heights on the imaging plane of light rays passing through the lens. It can be seen from FIGS. 20A to 20D that the imaging lens provided in Example 10 can achieve good imaging quality.

In summary, Examples 1 to 10 satisfy the relationships shown in Table 31, respectively.

Table 31

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

The above description is only a preferred embodiment of the present application and an exemplary illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover the above technical features without departing from the inventive concept. Or other technical solutions formed by any combination of their equivalent features. For example, a technical solution formed by replacing the above features with technical features disclosed in this application (but not limited to) but having similar functions.

Claims (42)

1. An imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, and a fourth lens, characterized in that:

   The first lens has negative optical power, and its object side is concave;

   The second lens has positive power or negative power;

   The third lens has positive power or negative power, its object side is convex, and its image side is concave;

   The fourth lens has positive power,

   Among them, there is an air gap between adjacent lenses, and

   The effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy -1.3<f4/f1<0.
2. The imaging lens of claim 1, wherein an effective focal length f of the imaging lens and an effective focal length f1 of the first lens satisfy -1<f/f1<0.
3. The imaging lens according to claim 1, wherein the effective focal length f of the imaging lens, the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the image side of the fourth lens Meet 0<f/|R7-R8|<0.5.
4. The imaging lens according to claim 1, wherein the center thickness CT1 of the first lens and the center thickness CT4 of the fourth lens satisfy 0.5<CT4/CT1<1.5.
5. The imaging lens according to claim 1, wherein the radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the image side of the third lens satisfy 0<R6/R5<2.
6. The imaging lens according to claim 1, wherein the effective focal length f of the imaging lens and the radius of curvature R1 of the object side of the first lens satisfy -1<f/R1<0.
7. The imaging lens according to claim 1, wherein the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT21 of the object side of the second lens satisfy 0<DT31/DT21< 0.8.
8. The imaging lens according to claim 1, wherein the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT41 of the object side of the fourth lens satisfy 1<DT41/DT31< 2.5.
9. The imaging lens according to claim 1, wherein the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens satisfy 0<ET4/CT4<1.
10. The imaging lens according to claim 1, wherein an air gap T23 between the second lens and the third lens on the optical axis and the third lens and the fourth lens on the optical axis The air interval T34 satisfies 0<T34/T23<0.5.
11. The imaging lens of claim 1, wherein an effective focal length f of the imaging lens and a combined focal length f34 of the third lens and the fourth lens satisfy 1<f34/f<2.5.
12. The imaging lens according to any one of claims 1 to 11, wherein the half of the maximum field angle of the imaging lens HFOV satisfies HFOV>45°.
13. An imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, and a fourth lens, characterized in that:

    The first lens has negative optical power, and its object side is concave;

    The second lens has optical power;

    The third lens has optical power, its object side is convex, and its image side is concave;

    The fourth lens has positive power,

    Among them, there is an air gap between adjacent lenses, and

    The maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT21 of the object side of the second lens satisfy 0<DT31/DT21<0.8.
14. The imaging lens according to claim 13, wherein the effective focal length f of the imaging lens and the effective focal length f1 of the first lens satisfy -1<f/f1<0.
15. The imaging lens according to claim 13, wherein the effective focal length f of the imaging lens, the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the image side of the fourth lens Meet 0<f/|R7-R8|<0.5.
16. The imaging lens of claim 13, wherein the center thickness CT1 of the first lens and the center thickness CT4 of the fourth lens satisfy 0.5<CT4/CT1<1.5.
17. The imaging lens according to claim 13, wherein the curvature radius R5 of the object side of the third lens and the curvature radius R6 of the image side of the third lens satisfy 0<R6/R5<2.
18. The imaging lens according to claim 13, wherein the effective focal length f of the imaging lens and the radius of curvature R1 of the object side surface of the first lens satisfy -1<f/R1<0.
19. The imaging lens according to claim 13, wherein the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT41 of the object side of the fourth lens satisfy 1<DT41/DT31< 2.5.
20. The imaging lens according to claim 13, wherein the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens satisfy 0<ET4/CT4<1.
21. The imaging lens according to claim 13, wherein an air interval T23 of the second lens and the third lens on the optical axis is different from that of the third lens and the fourth lens on the optical axis The air interval T34 satisfies 0<T34/T23<0.5.
22. The imaging lens according to claim 13, wherein an effective focal length f of the imaging lens and a combined focal length f34 of the third lens and the fourth lens satisfy 1<f34/f<2.5.
23. The imaging lens according to any one of claims 13 to 22, wherein the half of the maximum field angle of the imaging lens HFOV satisfies HFOV>45°.
24. An imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, and a fourth lens, characterized in that:

    The first lens has negative optical power, and its object side is concave;

    The second lens has optical power;

    The third lens has optical power, its object side is convex, and its image side is concave;

    The fourth lens has positive power,

    Among them, there is an air gap between adjacent lenses, and

    The effective focal length f of the imaging lens and the combined focal length f34 of the third lens and the fourth lens satisfy 1<f34/f<2.5.
25. The imaging lens according to claim 24, wherein an effective focal length f of the imaging lens and an effective focal length f1 of the first lens satisfy -1<f/f1<0.
26. The imaging lens of claim 24, wherein the effective focal length f of the imaging lens, the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the image side of the fourth lens Meet 0<f/|R7-R8|<0.5.
27. The imaging lens of claim 24, wherein a center thickness CT1 of the first lens and a center thickness CT4 of the fourth lens satisfy 0.5<CT4/CT1<1.5.
28. The imaging lens according to claim 24, wherein the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy 0<R6/R5<2.
29. The imaging lens according to claim 24, wherein an effective focal length f of the imaging lens and a radius of curvature R1 of the object side of the first lens satisfy -1<f/R1<0.
30. The imaging lens according to claim 24, wherein the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT41 of the object side of the fourth lens satisfy 1<DT41/DT31< 2.5.
31. The imaging lens according to claim 24, wherein the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens satisfy 0<ET4/CT4<1.
32. The imaging lens according to claim 24, wherein an air gap T23 between the second lens and the third lens on the optical axis and the third lens and the fourth lens on the optical axis The air interval T34 satisfies 0<T34/T23<0.5.
33. The imaging lens according to any one of claims 24 to 32, wherein the half of the maximum field angle of the imaging lens HFOV satisfies HFOV>45°.
34. An imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, and a fourth lens, characterized in that:

    The first lens has negative optical power, and its object side is concave;

    The second lens has optical power;

    The third lens has optical power, its object side is convex, and its image side is concave;

    The fourth lens has positive power,

    Among them, there is an air gap between adjacent lenses, and

    The air gap T23 between the second lens and the third lens on the optical axis and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy 0<T34/T23<0.5.
35. The imaging lens according to claim 34, wherein an effective focal length f of the imaging lens and an effective focal length f1 of the first lens satisfy -1<f/f1<0.
36. The imaging lens according to claim 34, wherein the effective focal length f of the imaging lens, the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the image side of the fourth lens Meet 0<f/|R7-R8|<0.5.
37. The imaging lens of claim 34, wherein the center thickness CT1 of the first lens and the center thickness CT4 of the fourth lens satisfy 0.5<CT4/CT1<1.5.
38. The imaging lens according to claim 34, wherein the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy 0<R6/R5<2.
39. The imaging lens of claim 34, wherein the effective focal length f of the imaging lens and the radius of curvature R1 of the object side of the first lens satisfy -1<f/R1<0.
40. The imaging lens according to claim 34, wherein the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT41 of the object side of the fourth lens satisfy 1<DT41/DT31< 2.5.
41. The imaging lens of claim 34, wherein an edge thickness ET4 of the fourth lens and a center thickness CT4 of the fourth lens satisfy 0<ET4/CT4<1.
42. The imaging lens according to any one of claims 34 to 41, wherein the half of the maximum field angle of the imaging lens HFOV satisfies HFOV>45°.

Images