CN114035305A - Optical imaging lens - Google Patents

Abstract

The application provides an optical imaging lens, which sequentially comprises a diaphragm, a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis, wherein the first lens has focal power, and the curvature radius of an object side surface of the first lens is variable; and the second lens, the third lens and the fourth lens have optical power.

Description

Optical imaging lens

Technical Field

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

Background

In recent years, with the advancement of science and technology, interactive devices and optical imaging lenses included therein have been developed dramatically, and in order to be suitable for information transmission between interactive devices, a special optical imaging lens is required for docking, and the optical imaging lens is not only required to ensure the performance of the lens, but also more important to ensure the accuracy of information in the process of transmitting information back and forth. Therefore, designing an optical imaging lens capable of receiving a front-end optical system and connecting a subsequent optical system ensures that information of the front-end optical system is accurately transmitted to the subsequent optical system, and miniaturization of the optical imaging lens is one of the problems to be solved in the field.

Disclosure of Invention

The application provides an optical imaging lens which sequentially comprises a diaphragm, a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis, wherein the first lens has focal power, and the curvature radius of an object side surface of the first lens is variable; and the second lens, the third lens and the fourth lens have optical power. In some embodiments, the optical imaging lens further includes an electron photosensitive component, and a maximum incidence angle CRAmax of a principal ray incident on the electron photosensitive component satisfies: CRAMax < 0.7 < 3.0.

In some embodiments, the second lens has a positive optical power, and the object side surface is concave and the image side surface is convex.

In some embodiments, the third lens has a negative optical power and the object side surface is concave.

In some embodiments, the fourth lens has a positive optical power and the object side surface is convex.

In some embodiments, a distance OBJ of the subject to the object side of the first lens satisfies: OBJ >150 mm.

In some embodiments, the radius of curvature R1 of the object side surface of the first lens satisfies: r1 is more than 40mm and less than 77 mm.

In some embodiments, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD < 1.9.

In some embodiments, a half Semi-FOV of a maximum field angle of the optical imaging lens satisfies: Semi-FOV > 40.

In some embodiments, the wavelength λ of the incident light of the optical imaging lens satisfies: lambda is more than 850 nm.

In some embodiments, the abbe number V2 of the second lens and the abbe number V3 of the third lens satisfy: V2-V3 < 15.

In some embodiments, the material of the second lens is the same as the material of the fourth lens.

In some embodiments, the abbe number V2 of the second lens and the abbe number V4 of the fourth lens satisfy: v2 ═ V4 < 50.

In some embodiments, the relative illuminance RI of the maximum field angle of the optical imaging lens satisfies: RI > 45%.

In some embodiments, the first lens comprises: the lens comprises a bendable film, a focal length adjusting layer and a light-transmitting module, wherein the bendable film forms the object side surface of the first lens, and the focal length adjusting layer is glued with the light-transmitting module.

The present application further provides an optical imaging lens, sequentially comprising from an object side to an image side along an optical axis

A diaphragm, a first lens, a second lens, a third lens, and a fourth lens, wherein,

the first lens has a first lens with optical power, and the curvature radius of the object side surface of the first lens is variable;

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

the third lens and the fourth lens have optical power.

In some embodiments, the optical imaging lens further includes an electron photosensitive component, and a maximum incidence angle CRAmax of a principal ray incident on the electron photosensitive component satisfies: CRAMax < 0.7 < 3.0.

In some embodiments, the third lens has a negative optical power and the object side surface is concave.

In some embodiments, the fourth lens has a positive optical power and the object side surface is convex.

In some embodiments, a distance OBJ of the subject to the object side of the first lens satisfies: OBJ >150 mm.

In some embodiments, the radius of curvature R1 of the object side surface of the first lens satisfies: r1 is more than 40mm and less than 77 mm.

In some embodiments, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD < 1.9.

In some embodiments, a half Semi-FOV of a maximum field angle of the optical imaging lens satisfies: Semi-FOV > 40.

In some embodiments, the wavelength λ of the incident light of the optical imaging lens satisfies: lambda is more than 850 nm.

In some embodiments, the abbe number V2 of the second lens and the abbe number V3 of the third lens satisfy: V2-V3 < 15.

In some embodiments, the material of the second lens is the same as the material of the fourth lens.

In some embodiments, the abbe number V2 of the second lens and the abbe number V4 of the fourth lens satisfy: v2 ═ V4 < 50.

In some embodiments, the relative illuminance RI of the maximum field angle of the optical imaging lens satisfies: RI > 45%.

In some embodiments, the first lens comprises: the lens comprises a bendable film, a focal length adjusting layer and a light-transmitting module, wherein the bendable film forms the object side surface of the first lens, and the focal length adjusting layer is glued with the light-transmitting module.

The four-piece type lens framework is adopted, and the focal power, the surface type and the center thickness of each lens and the on-axis distance between each lens are reasonably distributed, so that the optical imaging lens meets the imaging requirement, and at least one beneficial effect of information transmission, miniaturization and the like between the front-end optical system and the rear-end optical system is realized.

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 structural view of an optical imaging lens according to embodiment 1 of the present application;

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

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

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

fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;

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

fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;

fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatic curve, a chromatic aberration of magnification curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 4;

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

fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatic curve, a chromatic aberration of magnification curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 5;

fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;

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

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

fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a chromatic aberration of magnification curve, and a relative illuminance curve of the optical imaging lens at an object distance of infinity in example 7, respectively;

fig. 15A to 15D show an on-axis chromatic aberration curve, an astigmatism curve, a chromatic aberration of magnification curve, and a relative illuminance curve of an optical imaging lens of example 7 at an object distance of 350mm, respectively;

fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a chromatic aberration of magnification curve, and a relative illuminance curve of an optical imaging lens of example 7 at an object distance of 150mm, respectively;

fig. 17A shows a schematic configuration diagram of a first lens of an exemplary embodiment of the present application; and

fig. 17B shows a schematic configuration diagram of a first lens of another exemplary embodiment in the present application.

Detailed Description

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

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

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

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

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

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

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

The features, principles, and other aspects of the present application are described in detail below.

An optical imaging lens according to an exemplary embodiment of the present application may include, for example, four lenses having optical powers, i.e., a first lens, a second lens, a third lens, and a fourth lens. The four lenses are arranged in sequence from the object side to the image side along the optical axis. In the first to fourth lenses, any two adjacent lenses may have an air space therebetween. The optical imaging lens may further include optical devices (not shown) for deflecting light rays, such as a deflecting prism and a mirror.

In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The stop may be provided at an appropriate position as needed to control the light-entering amount of the optical imaging lens, for example, between the object side and the first lens.

In an exemplary embodiment, the first lens may have a positive power or a negative power; the second lens can have positive focal power, and the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens can have negative focal power, and the object side surface of the third lens is a concave surface; the fourth lens can have positive focal power, the object side surface of the fourth lens is a convex surface, and the positive and negative focal powers of all the lenses of the optical imaging lens are reasonably distributed, so that the image pickup effect can be effectively improved.

In addition, the first lens has automatic focusing capacity, the curvature radius of the object side surface of the first lens can be changed, the reasonable distribution of the focal power of the optical imaging lens is facilitated, the integral aberration of the optical imaging lens can be optimized, the imaging quality of the optical imaging lens can be improved, different surface types of the second lens, the third lens and the fourth lens are controlled, and the aberration of the optical imaging lens is balanced. The first lens can be further provided with a film layer on the object side surface, the curvature of the film layer can be changed along with the change of voltage, and the optical imaging lens can automatically focus under different object distances on the premise of not changing the total length of the optical imaging lens, so that the optical imaging lens becomes thinner. The second lens has positive focal power, the object side surface of the second lens is a concave surface, the image side surface of the second lens is a convex surface, the increase of the field angle is facilitated, meanwhile, the compression of the incident angle of light rays at the position of the diaphragm is facilitated, the pupil aberration is reduced, and the imaging quality is improved; the third lens has negative focal power, so that coma aberration and astigmatism of the optical imaging lens are reduced; the fourth lens has positive focal power, and the spherical aberration of the system is controlled within a reasonable level, so that the on-axis field of view obtains good imaging quality.

In an exemplary embodiment, the optical imaging lens may satisfy 0.7 < CRAmax < 3.0, where CRAmax is a maximum incident angle of the chief ray incident on the electron sensing assembly. The optical imaging lens meets the condition that CRAmax is more than 0.7 and less than 3.0, so that the optical imaging lens tends to be telecentric on an image side, and the optical imaging lens can lose light information as little as possible. More specifically, CRAmax may satisfy: CRAMax < 1.0 < 3.0.

In an exemplary embodiment, the optical imaging lens may satisfy OBJ >150mm, where OBJ is the distance of the subject to the object side of the first lens. The optical imaging lens meets the requirement that OBJ is larger than 150mm, the object distance of the optical imaging lens is favorably controlled, and the larger the object distance is, the larger the imaging clear range of the optical imaging lens is.

In an exemplary embodiment, the optical imaging lens may satisfy 40mm < R1 < 77mm, where R1 is a radius of curvature of an object side surface of the first lens. The optical imaging lens meets the condition that R1 is more than 40mm and less than 77mm, and is favorable for controlling the off-axis aberration of the optical imaging lens. More specifically, R1 may satisfy: 65mm < R1 < 77 mm.

In an exemplary embodiment, the optical imaging lens may satisfy f/EPD < 1.9, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. The optical imaging lens meets the condition that F/EPD is less than 1.9, so that the optical imaging lens can obtain better F number and obtain larger light entering amount under the condition of the same focal length, the illumination of an image plane and the response of a chip are improved, and the power consumption of a system is reduced. More specifically, the f/EPD may satisfy: f/EPD is more than 1.5 and less than 1.9.

In an exemplary embodiment, an optical imaging lens may suffice

Wherein the Semi-FOV is half of the maximum field angle of the optical imaging lens. The optical imaging lens satisfies

The method is favorable for obtaining a larger field range and improving the capturing capability of the optical imaging lens group on the object information. More specifically, the Semi-FOV may satisfy:

in an exemplary embodiment, the optical imaging lens may satisfy λ > 850nm, where λ is a wavelength of incident light of the optical imaging lens. The optical imaging lens meets the condition that lambda is larger than 850nm, and the system can acquire information of infrared bands. More specifically, λ may satisfy: 850nm < lambda < 1100nm, for example 925nm, 940nm and 955 nm.

In an exemplary embodiment, the optical imaging lens may satisfy V2-V3 < 15, where V2 is an abbe number of the second lens and V3 is an abbe number of the third lens. The optical imaging lens meets the requirement that V2-V3 is less than 15, and the control of the integral chromatic aberration of the optical imaging lens is facilitated. More specifically, V2 and V3 may satisfy: 10 < V2-V3 < 15.

In an exemplary embodiment, in the optical imaging lens, a material of the second lens may be the same as a material of the fourth lens. The optical imaging lens may satisfy V2 ═ V4 < 50, where V2 is the abbe number of the second lens and V4 is the abbe number of the fourth lens. The optical imaging lens meets the conditions, and the chromatic aberration of the whole optical imaging lens is reduced by matching with other lenses.

In an exemplary embodiment, the optical imaging lens may satisfy RI > 45%, where RI is a relative illuminance of a maximum field angle of the optical imaging lens. The optical imaging lens meets the condition that RI is more than 45 percent, and is favorable for ensuring that the optical imaging lens is not distorted.

In an exemplary embodiment, the first lens may sequentially include along the optical axis: the flexible film, the focal length adjusting layer and the light-transmitting module are arranged on the object side surface of the first lens; and the image side surface of the focal length adjusting layer is glued with the light-transmitting module. According to an exemplary embodiment of the present application, a first lens includes a bendable film, a focus adjustment layer, and a light transmissive module. Fig. 17A shows a schematic structural diagram of the first lens in the present application. The first lens includes a flexible film T1, a focus adjusting layer T2, and a light transmissive module T3. Fig. 17B shows a schematic configuration diagram of a first lens of another exemplary embodiment in the present application. The first lens includes a flexible film T11, a focus adjusting layer T22, and a light transmissive module T33. Specifically, the focus adjusting layer T22 may be disposed between the bendable film T11 and the light transmissive module T33, and the focus adjusting layer T22 may be connected with a conductive material (not shown). When voltage is applied to the conductive material from the outside, the object side surface of the focus adjusting layer T22 is deformed, and then the bendable film T11 is driven to deform, so that the focal length of the first lens is changed, and therefore the automatic focusing function of the lens at different object distances can be realized without changing the total length of the optical imaging lens, and the optical imaging lens becomes thinner. It should be understood that the focus adjusting layer in the present application is not limited to include only one material, and in actual production, in order to reasonably adjust the total effective focal length of the optical imaging lens, various focus adjusting layers, such as a first focus adjusting layer, a second focus adjusting layer, etc., may be disposed between the flexible film and the light-transmitting module according to specific requirements. And the first focus adjusting layer and the second focus adjusting layer are not mutually soluble. When voltage is applied to the conductive material, the focus adjusting layer can be deformed, and then the contact surface shapes of the flexible film and the first focus adjusting layer and the second focus adjusting layer are driven to change, so that the focus of the first lens is changed, and the total effective focus of the optical imaging lens can be adjusted.

In an exemplary embodiment, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an imaging surface.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, four 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 optical imaging lens can be effectively reduced, the sensitivity of the optical imaging lens can be reduced, and the processability of the optical imaging lens can be improved, so that the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic products. The optical imaging lens according to the embodiment of the application also has the advantages that the imaging requirements are met, and meanwhile, the information transmission and the miniaturization between the front-end optical system and the rear-end optical system are realized.

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

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

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

Example 1

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

As shown in fig. 1, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a filter E5.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S4. The second lens element E2 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The third lens element E3 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fourth lens element E4 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. Filter E5 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

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

TABLE 1

In embodiment 1, the total effective focal length f of the optical imaging lens is 1.12mm, the distance TTL from the object-side surface of the first lens element to the imaging plane along the optical axis is 3.18mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane is 0.85mm, and the half semifov of the maximum field angle of the optical imaging lens is 1.12mm

In embodiment 1, the profile x of the aspheric surfaces included in the object-side and image-side surfaces of the lenses of the first lens E1 through the fourth lens E4 may be defined using, but not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients A that can be used for the aspherical mirror surfaces S5 to S10 in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S5

-3.1980E-02

-1.0333E-03

5.8382E-04

1.2201E-04

6.1535E-05

4.6439E-06

4.1470E-07

1.0330E-06

2.2974E-06

S6

-8.4471E-02

6.3812E-03

6.7452E-03

1.6928E-03

1.5392E-03

2.9690E-04

1.1179E-04

-1.6064E-06

-3.1319E-05

S7

-6.5573E-02

1.1248E-02

5.9916E-03

-2.4987E-04

3.3045E-03

-1.5012E-03

3.8271E-04

-3.9522E-04

7.8825E-05

S8

-3.9368E-01

-2.0045E-02

-2.2968E-03

-9.4177E-03

4.3363E-03

-2.6221E-03

1.5146E-03

-4.5773E-04

3.5321E-04

S9

1.6772E-01

-3.0197E-02

2.3816E-03

-2.7074E-03

1.1191E-03

-6.4622E-04

2.0205E-04

-1.3605E-04

2.4397E-05

S10

3.6416E-01

-5.3710E-02

6.7447E-03

9.0325E-04

9.2482E-05

5.5663E-04

-2.3348E-04

1.6293E-04

-2.3549E-05

TABLE 2

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

Example 2

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

As shown in fig. 3, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a filter E5.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S4. The second lens element E2 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The third lens element E3 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fourth lens element E4 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. Filter E5 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In example 2, the total effective focal length f of the optical imaging lens is 1.12mm, the distance TTL from the object-side surface of the first lens element to the imaging plane along the optical axis is 3.19mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane is 0.85mm, and the half semifov of the maximum field angle of the optical imaging lens is 1.12mm

Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 3

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S5

-3.1881E-02

-1.0337E-03

5.8149E-04

1.2609E-04

6.2582E-05

6.2761E-06

-2.9178E-07

1.2031E-06

2.1404E-06

S6

-8.4296E-02

6.3684E-03

6.7399E-03

1.6933E-03

1.5585E-03

3.0002E-04

1.0980E-04

-2.5841E-06

-3.1958E-05

S7

-6.5458E-02

1.1261E-02

5.9574E-03

-2.2040E-04

3.3236E-03

-1.5275E-03

3.8475E-04

-3.9331E-04

7.9765E-05

S8

-3.9471E-01

-1.9672E-02

-2.4909E-03

-9.3305E-03

4.3312E-03

-2.6284E-03

1.5133E-03

-4.5747E-04

3.5279E-04

S9

1.6689E-01

-3.0448E-02

2.2700E-03

-2.6813E-03

1.1566E-03

-6.4305E-04

2.0691E-04

-1.3466E-04

2.5911E-05

S10

3.6344E-01

-5.4177E-02

6.6354E-03

1.0328E-03

1.1801E-04

5.5727E-04

-2.3356E-04

1.7060E-04

-2.0980E-05

TABLE 4

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

Example 3

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

As shown in fig. 5, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a filter E5.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S4. The second lens element E2 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The third lens element E3 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fourth lens element E4 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. Filter E5 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In example 2, the total effective focal length f of the optical imaging lens is 1.12mm, the distance TTL from the object-side surface of the first lens element to the imaging plane along the optical axis is 3.19mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane is 0.85mm, and the half semifov of the maximum field angle of the optical imaging lens is 1.12mm

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 5 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S5

-3.1634E-02

-9.5930E-04

6.3982E-04

1.4113E-04

7.5592E-05

9.0894E-06

-1.9075E-06

1.1844E-06

2.0495E-06

S6

-8.3502E-02

6.4192E-03

6.8729E-03

1.7204E-03

1.6728E-03

3.1322E-04

1.0664E-04

-8.7804E-06

-3.4311E-05

S7

-6.4778E-02

1.1302E-02

5.7992E-03

-9.6755E-05

3.4208E-03

-1.6664E-03

4.0914E-04

-3.9727E-04

8.5999E-05

S8

-4.0009E-01

-1.7996E-02

-3.2074E-03

-9.0858E-03

4.4978E-03

-2.7339E-03

1.5816E-03

-4.7521E-04

3.5660E-04

S9

1.6394E-01

-3.0929E-02

2.0958E-03

-2.9060E-03

1.3587E-03

-7.1917E-04

2.3640E-04

-1.3867E-04

3.0891E-05

S10

3.6128E-01

-5.3373E-02

6.7359E-03

1.2543E-03

3.6131E-04

5.9675E-04

-2.0883E-04

2.2718E-04

-2.3957E-06

TABLE 6

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

Example 4

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

As shown in fig. 7, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a filter E5.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S4. The second lens element E2 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The third lens element E3 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fourth lens element E4 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. Filter E5 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In example 4, the total effective focal length f of the optical imaging lens is 1.12mm, the distance TTL from the object-side surface of the first lens element to the imaging plane along the optical axis is 3.16mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane is 0.85mm, and the half semifov of the maximum field angle of the optical imaging lens is 1.12mm

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S5

-3.1861E-02

-7.4622E-04

7.1191E-04

1.5725E-04

6.8933E-05

6.9039E-06

-2.2651E-06

9.8167E-07

3.3049E-06

S6

-8.3379E-02

6.5997E-03

7.0645E-03

1.8084E-03

1.6837E-03

3.4232E-04

1.1106E-04

-2.4018E-05

-4.2711E-05

S7

-6.4365E-02

1.1206E-02

5.6979E-03

-2.9450E-06

3.5039E-03

-1.6643E-03

3.3031E-04

-4.2674E-04

1.1251E-04

S8

-4.0300E-01

-1.6770E-02

-3.3515E-03

-9.1893E-03

4.8357E-03

-2.7625E-03

1.6137E-03

-5.3842E-04

3.7260E-04

S9

1.6018E-01

-3.0517E-02

2.0561E-03

-3.6230E-03

1.4507E-03

-7.8940E-04

2.5223E-04

-1.8681E-04

3.2328E-05

S10

3.5790E-01

-4.9104E-02

7.0276E-03

9.4332E-04

6.9178E-04

8.1187E-04

-1.6324E-04

2.4370E-04

1.4890E-05

TABLE 8

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

Example 5

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

As shown in fig. 9, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a filter E5.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S4. The second lens element E2 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The third lens element E3 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fourth lens element E4 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. Filter E5 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In example 5, the total effective focal length f of the optical imaging lens is 1.12mm, the distance TTL from the object-side surface of the first lens element to the imaging plane along the optical axis is 3.14mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane is 0.85mm, and the half semifov of the maximum field angle of the optical imaging lens is 1.12mm

Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 9

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S5

-3.2541E-02

-7.5340E-04

6.8943E-04

1.4416E-04

6.4392E-05

7.4964E-06

1.3022E-06

-6.3586E-07

2.9754E-06

S6

-8.4129E-02

6.7618E-03

7.1278E-03

1.8989E-03

1.6602E-03

4.0207E-04

1.5151E-04

-8.8484E-06

-3.7252E-05

S7

-6.4119E-02

1.1203E-02

5.7952E-03

-1.0919E-04

3.4398E-03

-1.5056E-03

2.6806E-04

-4.2553E-04

1.1755E-04

S8

-3.9215E-01

-2.0352E-02

-1.6674E-03

-9.9510E-03

4.8865E-03

-2.7001E-03

1.5817E-03

-5.3472E-04

3.9250E-04

S9

1.6220E-01

-2.9905E-02

2.6917E-03

-3.5866E-03

1.0465E-03

-7.9374E-04

1.5179E-04

-2.0667E-04

2.6192E-05

S10

3.5478E-01

-4.6122E-02

7.3215E-03

3.9805E-04

1.4094E-04

6.8544E-04

-2.2842E-04

1.4297E-04

-1.4038E-05

Watch 10

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

Example 6

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

As shown in fig. 11, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a filter E5.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S4. The second lens element E2 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The third lens element E3 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fourth lens element E4 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E5 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In example 6, the total effective focal length f of the optical imaging lens was 1.14mm, the distance TTL along the optical axis from the object-side surface of the first lens element to the imaging plane was 3.22mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane was 0.85mm, and the half semifov of the maximum field angle of the optical imaging lens was 1.14mm

Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S5

-4.5043E-02

-3.0042E-03

6.2878E-04

2.3150E-04

3.3647E-05

-1.6681E-05

-1.1562E-05

-2.8056E-06

-2.5539E-06

S6

-9.9144E-02

7.5783E-03

9.7709E-03

2.4859E-03

1.0735E-03

-9.4460E-05

-1.5107E-04

-9.8150E-05

-6.5582E-05

S7

-8.8910E-02

1.6657E-02

1.0656E-02

-2.8162E-03

2.4985E-03

-1.3329E-03

4.2617E-04

-3.1787E-04

7.5566E-05

S8

-3.8363E-01

-6.2244E-03

-9.9167E-03

-6.7383E-03

1.0378E-03

-1.7618E-03

4.8597E-04

-3.0217E-04

6.2967E-05

S9

2.6303E-01

-1.6084E-02

5.4021E-03

-2.3454E-03

3.4674E-04

-8.8584E-04

-1.1576E-05

-2.3065E-04

-3.4249E-07

S10

3.1772E-01

-4.2132E-02

5.8714E-03

-2.9201E-03

-8.8823E-04

-5.4949E-04

-3.7330E-04

5.0131E-05

4.8621E-05

TABLE 12

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

Example 7

An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 16D. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a filter E5.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a planar image-side surface S4. The second lens element E2 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The third lens element E3 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fourth lens element E4 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. Filter E5 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In example 6, the total effective focal length f of the optical imaging lens was 1.14mm, the distance TTL along the optical axis from the object-side surface of the first lens element to the imaging plane was 3.23mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane was 0.85mm, and the half semifov of the maximum field angle of the optical imaging lens was 1.14mm

Table 13 shows a basic parameter table of the optical imaging lens of example 7 at an object distance of infinity, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 14 shows a basic parameter table of the first lens in the optical imaging lens of example 7, in which the units of the radius of curvature, the thickness/distance, and the focal length are millimeters (mm), at an object distance of 350 mm. Table 15 shows a basic parameter table of the first lens in the optical imaging lens of example 7, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm), at an object distance of 150 mm. Table 16 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 13

TABLE 14

Watch 15

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S5

-3.2473E-02

-5.1939E-04

1.3593E-03

1.5247E-04

1.5177E-04

-1.7093E-05

-2.6929E-05

5.1071E-05

4.3707E-05

S6

-8.8470E-02

1.4591E-02

1.2450E-02

1.8277E-03

2.7882E-03

-6.4515E-04

-5.2493E-04

-2.9248E-04

-6.1872E-06

S7

-6.8954E-02

1.7902E-02

7.3905E-03

7.6250E-04

4.8415E-03

-4.9629E-03

1.2605E-03

-1.6137E-04

-1.6362E-04

S8

-4.5612E-01

-1.0623E-02

-1.1565E-02

-5.7714E-03

6.1591E-03

-4.2912E-03

1.7551E-03

3.2613E-04

-2.7897E-04

S9

1.5485E-01

-3.8358E-02

5.8036E-03

6.0047E-03

5.4531E-03

-4.0234E-03

-1.1544E-03

-6.6709E-04

-7.1135E-04

S10

3.3383E-01

-4.4387E-02

6.8274E-03

8.8359E-03

5.5429E-03

1.7438E-03

1.5090E-03

1.9140E-03

5.5011E-04

TABLE 16

In summary, examples 1 to 7 each satisfy the relationship shown in table 16.

TABLE 17

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

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 protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. The optical imaging lens is characterized by comprising a diaphragm, a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis in sequence, wherein,

the first lens has optical power, and the curvature radius of the object side surface of the first lens is variable; and

the second lens, the third lens, and the fourth lens have optical powers.

2. The optical imaging lens according to claim 1, further comprising an electron photosensitive component, wherein a maximum incidence angle CRAmax of a chief ray to the electron photosensitive component satisfies:

0.7＜CRAmax＜3.0。

3. the optical imaging lens of claim 1, wherein the second lens element has a positive optical power, and wherein the object side surface is concave and the image side surface is convex.

4. The optical imaging lens of claim 1, wherein the third lens has a negative optical power and a concave object-side surface.

5. The optical imaging lens of claim 1, wherein the fourth lens has a positive optical power and has a convex object-side surface.

6. The optical imaging lens of claim 1, wherein a distance OBJ of a subject from the object side surface of the first lens satisfies:

OBJ>150mm。

7. the optical imaging lens of claim 1, wherein the radius of curvature R1 of the object side surface of the first lens satisfies:

40mm＜R1＜77mm。

8. the optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy:

f/EPD＜1.9。

9. the optical imaging lens of claim 1, wherein the Semi-FOV of the maximum field angle of the optical imaging lens satisfies:

Semi-FOV＞40°。

10. the optical imaging lens is characterized by comprising a diaphragm, a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis in sequence, wherein,

the first lens has a first lens with optical power, and the curvature radius of the object side surface of the first lens is variable;

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

the third lens and the fourth lens have optical power.

Images