CN111399192A

CN111399192A - Optical imaging lens

Info

Publication number: CN111399192A
Application number: CN202010455434.6A
Authority: CN
Inventors: 谢检来; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-07-10

Abstract

The application discloses an optical imaging lens, which sequentially comprises from an object side to an image side along an optical axis: the image side surface of the first lens is a concave surface; a second lens having an optical power; and a third lens having a refractive power, an image-side surface of which is concave; the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the following conditional expression: f is less than 0.5 mm; f/EPD is more than 1.6 and less than 2.4.

Description

Optical imaging lens

Technical Field

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

Background

Currently, the mainstream fingerprint identification technology in the market is semiconductor silicon technology, optical imaging technology, ultrasonic technology and the like, wherein the optical imaging technology is adopted for fingerprint identification and occupies the market main position. With the further development of information technology, more and more electronic devices are demanding a portable miniature lens capable of providing short-range and wide-range identification. However, the existing miniaturized camera has a small visual field and a limited recognition range, and cannot perform large-range imaging recognition on the surface of an object at a relatively static position.

How to realize the large-scale visible light imaging recognition of the object surface by the miniaturized camera in the ultra-close range is one of the problems that many lens designers need to solve at present.

Disclosure of Invention

An aspect of the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the image side surface of the first lens is a concave surface; a second lens having an optical power; and a third lens having a refractive power, an image-side surface of which is concave; the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy the following conditional expression: f is less than 0.5 mm; f/EPD is more than 1.6 and less than 2.4.

In one embodiment, the object-side surface of the first lens element and the image-side surface of the third lens element have at least one aspherical mirror surface.

In one embodiment, the entrance pupil diameter EPD of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens may satisfy: 0 < EPD/ImgH < 0.4.

In one embodiment, the effective focal length f2 of the second lens and the effective focal length f1 of the first lens may satisfy: -0.7 < f2/f1 < -0.1.

In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R6 of the image side surface of the third lens satisfy: f/R6 is more than 0.4 and less than 1.2.

In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 0.1 < | R4|/R3 < 0.8.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy: 0.2 < (R2+ R1)/(R2-R1) < 1.8.

In one embodiment, the combined focal length f123 of the first lens, the second lens, and the third lens and the effective focal length f3 of the third lens may satisfy: 0.1 < f123/| f3| < 0.6.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the separation distance T12 of the first lens and the second lens on the optical axis may satisfy: 0.3 < T12/CT1 < 0.9.

In one embodiment, the edge thickness ET2 of the second lens and the central thickness CT2 of the second lens on the optical axis may satisfy: 0.4 < ET2/CT2 < 0.8.

In one embodiment, a distance SAG31 on the optical axis from the intersection point of the object-side surface of the third lens and the optical axis to the effective radius vertex of the object-side surface of the third lens and a distance SAG22 on the optical axis from the intersection point of the image-side surface of the second lens and the optical axis to the effective radius vertex of the image-side surface of the second lens may satisfy: 0.2 < SAG31/SAG22 < 0.8.

In one embodiment, the optical imaging lens further comprises a diaphragm, and the sum ∑ AT of the spacing distances between any two adjacent lenses in the first lens to the third lens on the optical axis and the distance SD between the diaphragm and the image side surface of the third lens on the optical axis can satisfy 0.4 < ∑ AT/SD < 1.0.

In one embodiment, the effective half aperture DT31 of the object side surface of the third lens, the effective half aperture DT21 of the object side surface of the second lens, and the effective half aperture DT22 of the image side surface of the second lens may satisfy: 0.5 < DT31/(DT21+ DT22) < 0.9.

In one embodiment, the maximum half field angle Semi-FOV of the optical imaging lens and the distance TT L between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis can satisfy 0.6mm^-1＜tan(Semi-FOV)/TTL＜1.0mm^-1。

In one embodiment, the optical imaging lens further includes a glass screen disposed between the object side and the first lens.

Another aspect of the present application further provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the image side surface of the first lens is a concave surface; a second lens having an optical power; and a third lens having a refractive power, an image-side surface of which is concave; the combined focal length f123 of the first lens, the second lens and the third lens and the effective focal length f3 of the third lens satisfy: 0.1 < f123/| f3| < 0.6.

This application has adopted three lens, through the focal power of rational distribution each lens, face type, the center thickness of each lens and the epaxial interval between each lens etc for above-mentioned optical imaging lens has at least one beneficial effect such as big field of vision, miniaturization, high imaging quality.

Drawings

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

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 distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;

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 distortion curve, and a chromatic aberration of magnification 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 distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;

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 astigmatism curve, a distortion curve, and a chromatic aberration of magnification 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 astigmatism curve, a distortion curve, and a chromatic aberration of magnification 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 astigmatism curve, a distortion curve, and a chromatic aberration of magnification 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 distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 7;

fig. 15 is a schematic structural view showing an optical imaging lens according to embodiment 8 of the present application;

fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 8;

fig. 17 is a schematic structural view showing an optical imaging lens according to embodiment 9 of the present application;

fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 9;

fig. 19 is a schematic structural view showing an optical imaging lens according to embodiment 10 of the present application; and

fig. 20A to 20D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 10.

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, three lenses having optical powers, a first lens, a second lens, and a third lens. The three lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the third lens can have a spacing distance therebetween.

In an exemplary embodiment, the first lens may have a negative optical power, and the image-side surface thereof may be concave; the second lens may have a positive or negative optical power; and the third lens can have positive power or negative power, and the image side surface of the third lens can be concave.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: f is less than 0.5mm, wherein f is the total effective focal length of the optical imaging lens. More specifically, f further may satisfy: f is less than 0.4 mm. The requirement that f is less than 0.5mm is met, high-definition imaging and miniaturization of the lens are met, and meanwhile the identification area of the lens can be enlarged.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.6 < f/EPD < 2.4, 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 f/EPD is more than 1.6 and less than 2.4, thereby being beneficial to realizing large-view and high-definition imaging, ensuring the light inlet quantity of the lens and meeting the requirement of the chip on quantum efficiency during normal work.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0 < EPD/ImgH < 0.4, where EPD is the entrance pupil diameter of the optical imaging lens and ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens. More specifically, EPD and ImgH may further satisfy: 0.1 < EPD/ImgH < 0.3. The requirements that EPD/ImgH is more than 0 and less than 0.4 are met, the enlargement of the imaging surface of the lens is facilitated under the condition of ensuring the light inlet quantity of the lens, and the resolution of the optical imaging lens is improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -0.7 < f2/f1 < -0.1, wherein f2 is the effective focal length of the second lens and f1 is the effective focal length of the first lens. More specifically, f2 and f1 may further satisfy: -0.6 < f2/f1 < -0.1. Satisfying-0.7 < f2/f1 < -0.1 is favorable for concentrating positive focal power on the second lens and reducing aberration generated by the first lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.4 < f/R6 < 1.2, wherein f is the total effective focal length of the optical imaging lens, and R6 is the curvature radius of the image side surface of the third lens. More specifically, f and R6 further satisfy: f/R6 is more than 0.6 and less than 1.0. The f/R6 is more than 0.4 and less than 1.2, so that the deflection of light rays is restrained, and the imaging quality of the optical imaging lens is improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.1 < | R4|/R3 < 0.8, wherein R3 is the radius of curvature of the object-side surface of the second lens and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, R4 and R3 may further satisfy: 0.2 < | R4|/R3 < 0.7. Satisfying 0.1 < | R4|/R3 < 0.8 is beneficial to controlling the focal power of the second lens within a reasonable range and adjusting the contribution amount of the second lens to the aberration of an imaging system.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.2 < (R2+ R1)/(R2-R1) < 1.8, wherein R1 is the radius of curvature of the object-side surface of the first lens and R2 is the radius of curvature of the image-side surface of the first lens. More specifically, R2 and R1 may further satisfy: 0.3 < (R2+ R1)/(R2-R1) < 1.7. The condition that 0.2 < (R2+ R1)/(R2-R1) < 1.8 is satisfied, and the adjustment of the contribution amount of the first lens to the imaging system aberration is facilitated.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.1 < f123/| f3| < 0.6, where f123 is the combined focal length of the first, second, and third lenses, and f3 is the effective focal length of the third lens. More specifically, f123 and f3 may further satisfy: 0.1 < f123/| f3| < 0.5. The requirement that f123/| f3| < 0.6 is more than 0.1 is met, tolerance sensitivity of the first lens, the second lens and the third lens is favorably and reasonably distributed, and the length of the optical imaging lens is favorably shortened.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.3 < T12/CT1 < 0.9, where CT1 is the central thickness of the first lens on the optical axis and T12 is the separation distance between the first lens and the second lens on the optical axis. More specifically, CT1 and T12 further satisfy: 0.4 < T12/CT1 < 0.8. The requirement of T12/CT1 being more than 0.3 and less than 0.9 is met, and the miniaturization and the processing and the molding of the optical imaging lens are facilitated.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.4 < ET2/CT2 < 0.8, wherein ET2 is the edge thickness of the second lens and CT2 is the central thickness of the second lens on the optical axis. More specifically, ET2 and CT2 further satisfy: 0.5 < ET2/CT2 < 0.7. The condition that ET2/CT2 is more than 0.4 and less than 0.8 is met, and the mass processing of the lens is facilitated.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.2 < SAG31/SAG22 < 0.8, wherein SAG31 is the distance on the optical axis from the intersection point of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens, and SAG22 is the distance on the optical axis from the intersection point of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens. More specifically, SAG31 and SAG22 further may satisfy: 0.3 < SAG31/SAG22 < 0.6. The lens meets the requirement that SAG31/SAG22 is more than 0.2 and less than 0.8, and the lens forming difficulty can be effectively reduced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy 0.4 < ∑ AT/SD < 1.0, where ∑ AT is a sum of distances of intervals on an optical axis of any adjacent two of the first to third lenses, and SD is a distance on the optical axis of the diaphragm to an image side surface of the third lens, and more specifically ∑ AT and SD may further satisfy 0.5 < ∑ AT/SD < 0.9, 0.4 < ∑ AT/SD < 1.0, which is advantageous for rationality of a lens spatial layout, reduces difficulty in assembling the optical imaging lens, and makes the lens compact.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < DT31/(DT21+ DT22) < 0.9, where DT31 is the effective half aperture of the object side surface of the third lens, DT21 is the effective half aperture of the object side surface of the second lens, and DT22 is the effective half aperture of the image side surface of the second lens. More specifically, DT31, DT21 and DT22 may further satisfy: 0.6 < DT31/(DT21+ DT22) < 0.8. The requirements of 0.5 < DT31/(DT21+ DT22) < 0.9 are met, the assembly difficulty between the second lens and the third lens is reduced, and the assembly stability of the optical imaging lens is improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.6mm^-1＜tan(Semi-FOV)/TTL＜1.0mm^-1Where Semi-FOV is the maximum half field angle of the optical imaging lens and TT L is the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical imaging lens, more specifically, Semi-FOV and TT L may further satisfy 0.6mm^-1＜tan(Semi-FOV)/TTL＜0.9mm^-1. Satisfies 0.6mm^-1＜tan(Semi-FOV)/TTL＜1.0mm^-1The optical imaging lens is beneficial to expanding the visual field of the optical imaging lens under the condition of ensuring the length of the lens.

In an exemplary embodiment, an optical imaging lens according to the present application further includes a glass screen disposed between the object side and the first lens. In an exemplary embodiment, an optical imaging lens according to the present application further includes a stop disposed between the first lens and the second lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface. The application provides an optical imaging lens with the characteristics of miniaturization, large visual field, large identification area, strong stability, high resolution, high imaging quality and the like. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above three lenses. By reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the optical imaging lens is more beneficial to production and processing.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the third 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 each of the first lens, the second lens, and the third lens is an aspheric mirror surface. Optionally, the object-side surface and the image-side surface of each of the first lens, the second lens, and the third 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 three lenses are exemplified in the embodiment, the optical imaging lens is not limited to including three 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 includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

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

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 this example, the total effective focal length f of the optical imaging lens is 0.30mm, the total length TT L of the optical imaging lens (i.e., the distance on the optical axis from the object-side surface S3 of the first lens E2 to the imaging surface S11 of the optical imaging lens) is 2.55mm, the half ImgH of the diagonal length of the effective pixel region on the imaging surface S11 of the optical imaging lens is 0.77mm, the maximum half field angle Semi-FOV of the optical imaging lens is 64.0 °, and the aperture value Fno of the optical imaging lens is 1.98.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E2 through the third lens E4 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients A that can be used for the aspherical mirror surfaces S3 to S8 in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

2.7986E+00

-1.2645E+01

5.1359E+01

-1.5901E+02

3.6339E+02

-6.1070E+02

7.5644E+02

-6.9077E+02

4.6259E+02

S4

6.7319E+01

-5.8714E+03

3.0445E+05

-9.9690E+06

2.1929E+08

-3.3697E+09

3.7035E+10

-2.9456E+11

1.6972E+12

S5

-6.6721E+01

3.3147E+04

-9.6074E+06

1.6480E+09

-1.7499E+11

1.1618E+13

-4.6946E+14

1.0557E+16

-1.0130E+17

S6

3.9571E+01

-3.0006E+04

5.0047E+06

-4.7937E+08

3.0197E+10

-1.3214E+12

4.1325E+13

-9.3640E+14

1.5404E+16

S7

4.5900E+01

-1.1535E+04

1.1653E+06

-7.5857E+07

3.4570E+09

-1.1436E+11

2.8049E+12

-5.1568E+13

7.1107E+14

S8

-3.7219E+01

1.6985E+03

-7.7267E+04

2.4813E+06

-5.4105E+07

8.1562E+08

-8.6571E+09

6.5229E+10

-3.4717E+11

TABLE 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows 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 distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D 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. 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 includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

In this example, the total effective focal length f of the optical imaging lens is 0.31mm, the total length TT L of the optical imaging lens is 2.65mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S11 of the optical imaging lens is 0.77mm, the maximum half field angle Semi-FOV of the optical imaging lens is 65.9 °, and the aperture value Fno of the optical imaging lens is 1.81.

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

S3

2.5398E+00

-1.1617E+01

4.7086E+01

-1.3999E+02

2.9804E+02

-4.5757E+02

5.1144E+02

-4.1810E+02

2.4926E+02

S4

8.0564E+01

-8.4551E+03

5.3153E+05

-2.1089E+07

5.6089E+08

-1.0393E+10

1.3741E+11

-1.3122E+12

9.0630E+12

S5

-2.9291E+01

9.9798E+03

-1.9789E+06

2.1798E+08

-1.4122E+10

5.4276E+11

-1.1906E+13

1.3236E+14

-5.2986E+14

S6

3.6601E+00

-1.4095E+04

2.0729E+06

-1.6818E+08

8.9508E+09

-3.3295E+11

8.9361E+12

-1.7573E+14

2.5391E+15

S7

3.2174E+01

-8.4304E+03

8.0390E+05

-5.0537E+07

2.3240E+09

-8.0967E+10

2.1510E+12

-4.3237E+13

6.4745E+14

S8

-3.2814E+01

9.9959E+02

-3.0097E+04

6.9042E+05

-1.1010E+07

1.1695E+08

-7.6188E+08

2.0103E+09

1.2077E+10

TABLE 4

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points 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 distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the 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 includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

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

In this example, the total effective focal length f of the optical imaging lens is 0.35mm, the total length TT L of the optical imaging lens is 2.65mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S11 of the optical imaging lens is 0.78mm, the maximum half field angle Semi-FOV of the optical imaging lens is 64.6 °, and the aperture value Fno of the optical imaging lens is 1.94.

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 6 shows the coefficients of high-order terms that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

2.1904E+00

-7.4427E+00

2.4343E+01

-6.4428E+01

1.2955E+02

-1.9334E+02

2.1292E+02

-1.7265E+02

1.0252E+02

S4

2.1535E+01

-2.5593E+03

1.7836E+05

-7.1852E+06

1.8595E+08

-3.2802E+09

4.0801E+10

-3.6427E+11

2.3458E+12

S5

-4.3343E+01

9.1738E+03

-1.0576E+06

6.1684E+07

-1.2289E+09

-5.0426E+10

3.4404E+12

-7.3507E+13

5.6093E+14

S6

6.3029E+01

-1.9998E+04

2.4913E+06

-1.8410E+08

8.9166E+09

-2.9282E+11

6.5497E+12

-9.7110E+13

8.6311E+14

S7

-2.6122E+01

-2.3984E+03

3.3731E+05

-2.2966E+07

1.0803E+09

-3.7496E+10

9.6434E+11

-1.8163E+13

2.4572E+14

S8

-6.5709E+01

4.0585E+03

-1.9733E+05

6.5470E+06

-1.4968E+08

2.4221E+09

-2.8321E+10

2.4187E+11

-1.5096E+12

TABLE 6

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points 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 distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D 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. 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 includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

In this example, the total effective focal length f of the optical imaging lens is 0.32mm, the total length TT L of the optical imaging lens is 2.65mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S11 of the optical imaging lens is 0.73mm, the maximum half field angle Semi-FOV of the optical imaging lens is 64.6 °, and the aperture value Fno of the optical imaging lens is 2.15.

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

S3

2.3124E+00

-7.8363E+00

2.5303E+01

-6.6531E+01

1.3428E+02

-2.0320E+02

2.2890E+02

-1.9127E+02

1.1775E+02

S4

2.8070E+01

-2.1199E+03

1.0414E+05

-3.1712E+06

6.3919E+07

-8.8826E+08

8.7048E+09

-6.0653E+10

2.9876E+11

S5

-3.7281E+01

1.5731E+04

-3.7559E+06

5.0872E+08

-4.1434E+10

2.0591E+12

-6.0934E+13

9.8356E+14

-6.6494E+15

S6

1.0013E+02

-3.5293E+04

5.5038E+06

-5.2048E+08

3.2996E+10

-1.4690E+12

4.7106E+13

-1.1012E+15

1.8784E+16

S7

-3.7573E+01

-2.2528E+03

5.0901E+05

-4.2518E+07

2.1722E+09

-7.4740E+10

1.7865E+12

-2.9734E+13

3.3567E+14

S8

-5.1834E+01

2.5705E+03

-1.1696E+05

3.9451E+06

-9.4848E+07

1.6354E+09

-2.0462E+10

1.8704E+11

-1.2474E+12

TABLE 8

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points 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 distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the 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 includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

In this example, the total effective focal length f of the optical imaging lens is 0.34mm, the total length TT L of the optical imaging lens is 2.65mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S11 of the optical imaging lens is 0.76mm, the maximum half field angle Semi-FOV of the optical imaging lens is 64.1 °, and the aperture value Fno of the optical imaging lens is 2.39.

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

S3

2.2380E+00

-7.2555E+00

2.1723E+01

-5.2227E+01

9.6317E+01

-1.3371E+02

1.3879E+02

-1.0729E+02

6.1317E+01

S4

2.8302E+01

-2.1923E+03

1.1281E+05

-3.6763E+06

8.0941E+07

-1.2562E+09

1.4095E+10

-1.1576E+11

6.9669E+11

S5

-1.5146E+01

1.5964E+03

7.3020E+05

-3.2712E+08

5.5118E+10

-4.9215E+12

2.4534E+14

-6.4473E+15

6.9606E+16

S6

8.5429E+01

-3.2030E+04

5.1583E+06

-5.0170E+08

3.2689E+10

-1.4946E+12

4.9147E+13

-1.1761E+15

2.0494E+16

S7

-4.3420E+01

-2.2324E+02

1.6986E+05

-7.7028E+06

-1.9757E+08

3.7342E+10

-1.9992E+12

6.2784E+13

-1.3027E+15

S8

-4.2036E+01

1.5830E+03

-5.8665E+04

1.7829E+06

-4.1029E+07

6.9872E+08

-8.7836E+09

8.1510E+10

-5.5565E+11

Watch 10

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D 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. 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 includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

In this example, the total effective focal length f of the optical imaging lens is 0.34mm, the total length TT L of the optical imaging lens is 2.65mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S11 of the optical imaging lens is 0.75mm, the maximum half field angle Semi-FOV of the optical imaging lens is 61.7 °, and the aperture value Fno of the optical imaging lens is 2.33.

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

S3

2.2674E+00

-9.4642E+00

3.4633E+01

-9.2619E+01

1.7768E+02

-2.4727E+02

2.5270E+02

-1.9077E+02

1.0611E+02

S4

3.8318E+01

-2.6786E+03

1.1689E+05

-3.2595E+06

6.1492E+07

-8.1432E+08

7.7405E+09

-5.3394E+10

2.6744E+11

S5

-4.0539E+01

1.8913E+04

-5.1438E+06

8.0584E+08

-7.6920E+10

4.5350E+12

-1.6105E+14

3.1541E+15

-2.6129E+16

S6

-5.5759E+01

-1.7518E+03

5.0467E+05

-3.7413E+07

1.4397E+09

-2.3389E+10

-4.7175E+11

3.7800E+13

-1.0765E+15

S7

2.9582E+01

-8.3181E+03

7.4319E+05

-4.0214E+07

1.4766E+09

-3.8447E+10

7.2169E+11

-9.7661E+12

9.3753E+13

S8

-2.6337E+01

1.9176E+02

1.5807E+04

-8.4416E+05

2.2584E+07

-3.9243E+08

4.7510E+09

-4.1176E+10

2.5736E+11

TABLE 12

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D 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 surface after light passes through the lens. 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 14D. 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 includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

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

In this example, the total effective focal length f of the optical imaging lens is 0.30mm, the total length TT L of the optical imaging lens is 2.65mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S11 of the optical imaging lens is 0.76mm, the maximum half field angle Semi-FOV of the optical imaging lens is 64.8 °, and the aperture value Fno of the optical imaging lens is 1.68.

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

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

2.6067E+00

-1.1218E+01

4.2216E+01

-1.1507E+02

2.2326E+02

-3.1219E+02

3.1876E+02

-2.3930E+02

1.3187E+02

S4

5.6799E+01

-4.9671E+03

2.6808E+05

-9.2051E+06

2.1370E+08

-3.4860E+09

4.0901E+10

-3.4921E+11

2.1719E+12

S5

-1.2283E+01

1.6504E+03

-4.0977E+04

-2.6863E+07

3.9506E+09

-2.5516E+11

8.7145E+12

-1.5315E+14

1.0910E+15

S6

2.1911E+02

-5.4241E+04

7.1420E+06

-5.9015E+08

3.3027E+10

-1.3037E+12

3.7135E+13

-7.7153E+14

1.1693E+16

S7

-2.1183E+01

-2.7843E+03

3.5204E+05

-1.8074E+07

4.0819E+08

3.2488E+09

-5.1228E+11

1.7023E+13

-3.2623E+14

S8

-5.7494E+01

3.4993E+03

-1.6915E+05

5.6761E+06

-1.3293E+08

2.2200E+09

-2.6891E+10

2.3828E+11

-1.5432E+12

TABLE 14

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

Example 8

An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.

As shown in fig. 15, the optical imaging lens includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

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

In this example, the total effective focal length f of the optical imaging lens is 0.35mm, the total length TT L of the optical imaging lens is 2.65mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S11 of the optical imaging lens is 0.85mm, the maximum half field angle Semi-FOV of the optical imaging lens is 64.7 °, and the aperture value Fno of the optical imaging lens is 1.84.

Table 15 shows a basic parameter table of the optical imaging lens of embodiment 8, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 16 shows high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 15

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

2.3965E+00

-9.0344E+00

3.1160E+01

-8.2597E+01

1.6158E+02

-2.3156E+02

2.4347E+02

-1.8800E+02

1.0614E+02

S4

4.1310E+01

-3.2922E+03

1.6682E+05

-5.3767E+06

1.1671E+08

-1.7717E+09

1.9254E+10

-1.5162E+11

8.6650E+11

S5

-5.5246E+00

-3.5463E+02

2.6277E+05

-4.7712E+07

4.2636E+09

-2.1310E+11

6.0374E+12

-9.0306E+13

5.5174E+14

S6

1.2379E+02

-2.5208E+04

3.0414E+06

-2.3428E+08

1.2265E+10

-4.5272E+11

1.2043E+13

-2.3338E+14

3.2954E+15

S7

-1.4202E+01

1.0506E+03

-1.5395E+05

1.4199E+07

-8.1562E+08

3.1147E+10

-8.2473E+11

1.5484E+13

-2.0764E+14

S8

-2.1318E+01

8.4819E+02

-3.2377E+04

8.7536E+05

-1.6395E+07

2.1701E+08

-2.0686E+09

1.4353E+10

-7.2543E+10

TABLE 16

Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 8. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 8, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens according to embodiment 8 can achieve good imaging quality.

Example 9

An optical imaging lens according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 is a schematic structural view showing an optical imaging lens according to embodiment 9 of the present application.

As shown in fig. 17, the optical imaging lens includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

In this example, the total effective focal length f of the optical imaging lens is 0.37mm, the total length TT L of the optical imaging lens is 2.50mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S11 of the optical imaging lens is 0.85mm, the maximum half field angle Semi-FOV of the optical imaging lens is 62.7 °, and the aperture value Fno of the optical imaging lens is 1.84.

Table 17 shows a basic parameter table of the optical imaging lens of example 9, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 18 shows high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 17

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

2.4689E+00

-8.7088E+00

2.5523E+01

-5.4507E+01

8.4539E+01

-9.7246E+01

8.5159E+01

-5.8024E+01

3.1034E+01

S4

4.0224E+01

-3.6989E+03

2.3078E+05

-9.3417E+06

2.5574E+08

-4.8906E+09

6.6769E+10

-6.5858E+11

4.7017E+12

S5

-2.9141E+01

9.5281E+03

-1.8628E+06

2.1853E+08

-1.6132E+10

7.5359E+11

-2.1577E+13

3.4477E+14

-2.3498E+15

S6

1.0268E+02

-1.5294E+04

1.2260E+06

-4.8290E+07

7.4301E+07

9.2299E+10

-5.1522E+12

1.5605E+14

-3.0612E+15

S7

2.7549E+00

-1.4982E+03

5.4646E+04

3.4584E+06

-4.7868E+08

2.6275E+10

-8.8751E+11

2.0305E+13

-3.2474E+14

S8

-2.6856E+01

1.4755E+03

-6.9487E+04

2.1739E+06

-4.5673E+07

6.6692E+08

-6.9444E+09

5.2297E+10

-2.8562E+11

Watch 18

Fig. 18A shows an on-axis chromatic aberration curve of an optical imaging lens of embodiment 9, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 18B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 9. Fig. 18C shows a distortion curve of the optical imaging lens of embodiment 9, which represents distortion magnitude values corresponding to different image heights. Fig. 18D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 9, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 18A to 18D, the optical imaging lens according to embodiment 9 can achieve good imaging quality.

Example 10

An optical imaging lens according to embodiment 10 of the present application is described below with reference to fig. 19 to 20D. Fig. 19 shows a schematic structural diagram of an optical imaging lens according to embodiment 10 of the present application.

As shown in fig. 19, the optical imaging lens includes, in order from an object side to an image side: a glass screen E1, a first lens E2, a stop STO, a second lens E3, a third lens E4, a filter E5 and an image plane S11.

In this example, the total effective focal length f of the optical imaging lens is 0.33mm, the total length TT L of the optical imaging lens is 2.80mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S11 of the optical imaging lens is 0.85mm, the maximum half field angle Semi-FOV of the optical imaging lens is 65.8 °, and the aperture value Fno of the optical imaging lens is 1.85.

Table 19 shows a basic parameter table of the optical imaging lens of example 10, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 20 shows high-order term coefficients that can be used for each aspherical mirror surface in example 10, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 19

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

2.3511E+00

-8.7401E+00

2.8921E+01

-7.1705E+01

1.2886E+02

-1.6772E+02

1.5905E+02

-1.1028E+02

5.5754E+01

S4

4.4855E+01

-3.3674E+03

1.5937E+05

-4.8112E+06

9.8325E+07

-1.4149E+09

1.4689E+10

-1.1137E+11

6.1744E+11

S5

-9.8529E+00

1.8122E+03

-2.1415E+05

7.6097E+06

6.2355E+08

-7.5217E+10

3.1566E+12

-6.1506E+13

4.6482E+14

S6

1.4445E+02

-2.9552E+04

3.4883E+06

-2.6135E+08

1.3285E+10

-4.7613E+11

1.2307E+13

-2.3195E+14

3.1887E+15

S7

-1.3307E+01

9.0945E+02

-1.8772E+05

2.1272E+07

-1.4023E+09

5.9727E+10

-1.7404E+12

3.5726E+13

-5.2237E+14

S8

-1.5744E+01

2.7968E+02

-2.9323E+03

-3.9645E+04

2.2130E+06

-4.3512E+07

5.1976E+08

-4.1914E+09

2.3619E+10

Watch 20

Fig. 20A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 10, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 20B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 10. Fig. 20C shows a distortion curve of the optical imaging lens of embodiment 10, which represents distortion magnitude values corresponding to different image heights. Fig. 20D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 10, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 20A to 20D, the optical imaging lens according to embodiment 10 can achieve good imaging quality.

In summary, examples 1 to 10 each satisfy the relationship shown in table 21.

Conditional expression (A) example	1	2	3	4	5	6	7	8	9	10
											f/EPD	1.98	1.81	1.94	2.15	2.39	2.33	1.68	1.84	1.84	1.85
EPD/ImgH	0.20	0.22	0.23	0.21	0.19	0.19	0.24	0.22	0.24	0.21
											f2/f1	-0.41	-0.43	-0.56	-0.42	-0.38	-0.42	-0.25	-0.24	-0.21	-0.24
f/R6	0.82	0.85	0.98	0.90	0.93	0.93	0.83	0.67	0.67	0.63
											\|R4\|/R3	0.51	0.65	0.47	0.32	0.28	0.50	0.29	0.29	0.26	0.28
(R2+R1)/(R2-R1)	1.44	1.23	0.39	0.67	0.80	1.28	1.40	1.42	1.60	1.42
											f123/\|f3\|	0.19	0.15	0.36	0.34	0.35	0.15	0.31	0.47	0.46	0.44
T12/CT1	0.72	0.56	0.59	0.68	0.66	0.74	0.57	0.55	0.45	0.59
											ET2/CT2	0.61	0.62	0.59	0.60	0.60	0.59	0.59	0.57	0.59	0.58
SAG31/SAG22	0.32	0.33	0.53	0.40	0.40	0.34	0.37	0.43	0.45	0.41
											∑AT/SD	0.76	0.66	0.70	0.80	0.79	0.85	0.71	0.63	0.54	0.66
DT31/(DT21+DT22)	0.71	0.67	0.63	0.67	0.71	0.73	0.65	0.66	0.68	0.66
											tan(Semi-FOV)/TTL(mm^-1)	0.81	0.84	0.79	0.79	0.78	0.70	0.80	0.80	0.78	0.79

TABLE 21

The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the 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 the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

the image side surface of the first lens is a concave surface;

a second lens having an optical power; and

a third lens having a refractive power, an image-side surface of which is concave;

the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the following conditional expression:

f＜0.5mm；

1.6＜f/EPD＜2.4。

2. the optical imaging lens of claim 1, wherein the entrance pupil diameter EPD of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfy: 0 < EPD/ImgH < 0.4.

3. The optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens and the effective focal length f1 of the first lens satisfy: -0.7 < f2/f1 < -0.1.

4. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the radius of curvature R6 of the image side surface of the third lens satisfy: f/R6 is more than 0.4 and less than 1.2.

5. The optical imaging lens of claim 1, wherein the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.1 < | R4|/R3 < 0.8.

6. The optical imaging lens of claim 1, wherein the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: 0.2 < (R2+ R1)/(R2-R1) < 1.8.

7. The optical imaging lens of claim 1, characterized in that the combined focal length f123 of the first lens, the second lens and the third lens and the effective focal length f3 of the third lens satisfy: 0.1 < f123/| f3| < 0.6.

8. The optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on the optical axis and a separation distance T12 of the first lens and the second lens on the optical axis satisfy: 0.3 < T12/CT1 < 0.9.

9. The optical imaging lens of claim 1, wherein the edge thickness ET2 of the second lens and the center thickness CT2 of the second lens on the optical axis satisfy: 0.4 < ET2/CT2 < 0.8.

10. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

the image side surface of the first lens is a concave surface;

a second lens having an optical power; and

the combined focal length f123 of the first lens, the second lens and the third lens and the effective focal length f3 of the third lens satisfy: 0.1 < f123/| f3| < 0.6.