CN210015278U

CN210015278U - Optical imaging lens

Info

Publication number: CN210015278U
Application number: CN201920732044.1U
Authority: CN
Inventors: 王馨; 胡亚斌; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-02-04
Anticipated expiration: 2029-05-21

Abstract

The application discloses an optical imaging lens, which sequentially comprises from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having optical power. Wherein the first lens has a negative focal power; the third lens and the sixth lens both have positive focal power; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; and the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens meet the condition that TTL/ImgH is less than or equal to 1.25.

Description

Optical imaging lens

Technical Field

The present invention relates to an optical imaging lens, and more particularly, to an optical imaging lens including eight lenses.

Background

In recent years, with the popularization of electronic products such as mobile phones and tablet computers, people have higher and higher requirements for portability, lightness and thinness of the electronic products; under the trend of popularization of large-size and high-pixel CMOS chips, increasingly stringent requirements are also put on various aspects of optical lenses for electronic products, such as larger imaging size.

At present, the miniaturization trend of electronic products limits the total length of a lens, so that the design difficulty of the lens is increased, the size of an image plane of a traditional matched lens can only reach about 1/3 inches generally, and the miniaturization and high resolution cannot be realized at the same time.

SUMMERY OF THE UTILITY MODEL

The present application provides an optical imaging lens applicable to portable electronic products that may solve, at least, or in part, at least one of the above-mentioned disadvantages of the related art.

The present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having a focal power, wherein the first lens may have a negative focal power; the third lens and the sixth lens may each have a positive optical power; the object side surface of the fourth lens can be a convex surface, and the image side surface can be a concave surface; the object-side surface of the fifth lens element can be convex, and the image-side surface can be concave.

In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy TTL/ImgH ≦ 1.25.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens can satisfy 1.5 < f1/f8 < 2.5.

In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f3 of the third lens can satisfy 1.4 < f/f3 < 2.5.

In one embodiment, the effective focal length f6 of the sixth lens and the total effective focal length f of the optical imaging lens can satisfy 1.5 < f6/f < 2.0.

In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy f/EPD < 2.5.

In one embodiment, a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens may satisfy 0 < R7/R8 < 1.5.

In one embodiment, the radius of curvature R9 of the object-side surface of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy 1 ≦ R9/R10 < 2.5.

In one embodiment, the radius of curvature R4 of the image-side surface of the second lens and the radius of curvature R5 of the object-side surface of the third lens satisfy 1.0 < R4/R5 < 2.5.

In one embodiment, an air interval T67 of the sixth lens and the seventh lens on the optical axis and an air interval T78 of the seventh lens and the eighth lens on the optical axis may satisfy 0 < (T67+ T78)/TTL < 0.5.

In one embodiment, the refractive index of at least three lenses of the first to eighth lenses is greater than or equal to 1.7.

In one embodiment, a center thickness of any one of the first lens to the eighth lens on the optical axis is less than 1 mm.

In one embodiment, the half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, ImgH, can satisfy ImgH ≧ 5 mm.

In one embodiment, the maximum half field angle Semi-FOV of the optical imaging lens may satisfy Semi-HFOV ≧ 50.

The optical imaging lens comprises eight lenses, the focal power, the surface type and the center thickness of each lens and the on-axis distance between the lenses are reasonably distributed, and high-order aspheric parameters are optimally selected, so that the optical imaging lens has at least one beneficial effect of being ultrathin, large in image surface, good in imaging quality and the like.

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 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 the optical imaging lens of embodiment 8.

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.

The optical imaging lens according to an exemplary embodiment of the present application may include, for example, eight lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in order from an object side to an image side along an optical axis. In the first to eighth lenses, any adjacent two lenses may have an air space therebetween.

In an exemplary embodiment, the first lens may have a negative power; the second lens has positive focal power or negative focal power; the third lens may have a positive optical power; the fourth lens has positive focal power or negative focal power, and the object side surface of the fourth lens can be a convex surface, and the image side surface of the fourth lens can be a concave surface; the fifth lens has positive focal power or negative focal power, the object side surface of the fifth lens can be a convex surface, and the image side surface of the fifth lens can be a concave surface; the sixth lens may have a positive optical power; the seventh lens has positive focal power or negative focal power; the eighth lens has positive power or negative power. Through carrying out rational distribution to the focal power of each lens in the imaging lens, can effectively balance the low order aberration of system for the system has better imaging quality and processing nature.

In an exemplary embodiment, the image side surface of the first lens may be concave.

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

In an exemplary embodiment, the object-side surface of the seventh lens element may be concave, and the image-side surface thereof may be convex.

In an exemplary embodiment, the object side surface of the eighth lens may be a concave surface.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy a conditional expression TTL/ImgH ≦ 1.25, where TTL is an axial distance from an object-side surface of the first lens element to an imaging surface of the optical imaging lens, and ImgH is a half of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens. More specifically, TTL and ImgH can further satisfy 1.20 ≦ TTL/ImgH ≦ 1.25, such as 1.23 ≦ TTL/ImgH ≦ 1.25. The condition TTL/ImgH is less than or equal to 1.25, and the ultrathin characteristic of the optical imaging lens is favorably realized.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5 < f1/f8 < 2.5, where f1 is an effective focal length of the first lens and f8 is an effective focal length of the eighth lens. More specifically, f1 and f8 can further satisfy 1.52. ltoreq. f1/f 8. ltoreq.2.05. Satisfying the conditional expression 1.5 < f1/f8 < 2.5, the ratio of the effective focal lengths of the first lens and the eighth lens can be reasonably restricted, thereby reasonably controlling the field curvature contributions of the first lens and the eighth lens to balance the field curvature contributions in a reasonable state. Alternatively, the eighth lens may have a negative optical power.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.4 < f/f3 < 2.5, where f is a total effective focal length of the optical imaging lens, and f3 is an effective focal length of the third lens. More specifically, f and f3 further satisfy 1.45. ltoreq. f/f 3. ltoreq.2.19. Satisfying the conditional expression 1.4 < f/f3 < 2.5, the spherical aberration contribution amount of the third lens can be controlled within a reasonable range, so that the on-axis field of view can obtain good imaging quality.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5 < f6/f < 2.0, where f6 is an effective focal length of the sixth lens, and f is a total effective focal length of the optical imaging lens. More specifically, f6 and f can further satisfy 1.62. ltoreq. f 6/f. ltoreq.1.98. Satisfying the conditional expression 1.5 < f6/f < 2.0, the effective focal length of the sixth lens can be reasonably controlled, and the deflection angle of light can be reduced, thereby reducing the sensitivity of the optical system.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression f/EPD < 2.5, 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. More specifically, f and EPD may further satisfy 2.0 ≦ f/EPD ≦ 2.2, e.g., f/EPD ≦ 2.20. It can be understood that the smaller the ratio of f to the EPD is, the larger the clear aperture of the lens is, the more the light entering amount in the same unit time is, the image plane brightness can be effectively improved, so that the lens can better meet the shooting requirements of insufficient light such as cloudy days and dusk, and the good imaging quality is realized. The optical imaging lens has larger relative aperture and stronger light collecting capacity by satisfying the conditional expression f/EPD < 2.5.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < R7/R8 < 1.5, where R7 is a radius of curvature of an object-side surface of the fourth lens and R8 is a radius of curvature of an image-side surface of the fourth lens. More specifically, R7 and R8 may further satisfy 0.2 < R7/R8 < 1.2, for example 0.43. ltoreq. R7/R8. ltoreq.1.05. The curvature radius of the object side surface and the curvature radius of the image side surface of the fourth lens can be reasonably controlled when the conditional expression 0 < R7/R8 < 1.5 is satisfied, so that the high-level spherical aberration can be balanced, and the sensitivity of the lens can be reduced.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1 ≦ R9/R10 < 2.5, where R9 is a radius of curvature of an object-side surface of the fifth lens, and R10 is a radius of curvature of an image-side surface of the fifth lens. More specifically, R9 and R10 may further satisfy 1.00. ltoreq. R9/R10. ltoreq.2.47. The curvature radius of the object side surface and the curvature radius of the image side surface of the fifth lens can be reasonably controlled, and the distortion of the optical imaging lens can be controlled within an acceptable range, so that better imaging quality is ensured.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.0 < R4/R5 < 2.5, where R4 is a radius of curvature of an image-side surface of the second lens and R5 is a radius of curvature of an object-side surface of the third lens. More specifically, R4 and R5 further satisfy 1.33. ltoreq. R4/R5. ltoreq.2.03. The conditional expression of 1.0 < R4/R5 < 2.5 is satisfied, the curvature radius of the image side surface of the second lens and the curvature radius of the object side surface of the third lens can be reasonably distributed, and the optical imaging lens can be better matched with the chief ray angle of the chip. Alternatively, the image-side surface of the second lens element can be concave, and the object-side surface of the third lens element can be convex.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < (T67+ T78)/TTL < 0.5, where T67 is an air interval of the sixth lens and the seventh lens on the optical axis, and T78 is an air interval of the seventh lens and the eighth lens on the optical axis. More specifically, T67, T78, and TTL can further satisfy 0.2 < (T67+ T78)/TTL < 0.4, e.g., 0.27 ≦ (T67+ T78)/TTL ≦ 0.34. The condition that (T67+ T78)/TTL is less than 0.5 is met, the space ratio of the seventh lens can be reasonably controlled, the assembly process of the lens is favorably ensured, and the optical imaging lens is favorably miniaturized.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression ImgH ≧ 5mm, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens. More specifically, ImgH can further satisfy 5mm ≦ ImgH ≦ 5.5mm, such as 5.21mm ≦ ImgH ≦ 5.30 mm. The requirement that the ImgH is more than or equal to 5mm is met, and the realization of the imaging effect of the large image surface of the optical imaging lens is facilitated.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression Semi-HFOV ≧ 50 °, where Semi-FOV is the maximum half field angle of the optical imaging lens. More specifically, the Semi-HFOV may further satisfy 50 ≦ Semi-HFOV ≦ 55, such as 50.0 ≦ Semi-HFOV ≦ 50.6. The optical imaging lens can have a larger imaging range by reasonably controlling the field angle of the optical imaging lens.

In an exemplary embodiment, the refractive index of at least three lenses among the first to eighth lenses of the optical imaging lens according to the present application may be greater than or equal to 1.7. The optical imaging lens is mainly provided with a high-refractive-index lens, which is more beneficial to correcting chromatic aberration of the system and balancing the chromatic aberration of the system, thereby improving the imaging quality of the lens. For example, the refractive index of the third lens, the fifth lens, and the seventh lens may be greater than or equal to 1.7. Further, the refractive index of the second lens may also be greater than or equal to 1.7.

In an exemplary embodiment, a center thickness of any one of the first lens to the eighth lens in the optical imaging lens according to the present application on the optical axis is less than 1 mm. The central thickness of each lens in the optical imaging system is reasonably controlled, the manufacturability in the aspects of lens forming, lens assembly and the like is favorably improved, and the miniaturization of the lens is favorably ensured.

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 required, for example, between the fourth lens and the fifth 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 optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, eight 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 imaging lens can be effectively reduced, the sensitivity of the imaging lens can be reduced, and the machinability of the 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 application provides a solution of an eight-piece lens, and the optical imaging lens has the characteristics of being ultrathin, large in image surface, good in imaging quality and the like, and can be matched with a sensor with higher pixels and a stronger image processing technology.

In the embodiment of the present application, at least one of the mirror surfaces of the respective lenses is an aspherical mirror surface, that is, at least one of the object-side surface and the image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth 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, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens has an object-side surface and an image-side surface which 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 eight lenses are exemplified in the embodiment, the optical imaging lens is not limited to include eight 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: the image sensor includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image plane S19.

The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19. Wherein the center thickness of any one of the first lens E1 to the eighth lens E8 on the optical axis is less than 1 mm.

In the present embodiment, the refractive indexes of the second lens E2, the third lens E3, the fifth lens E5 and the seventh lens E7 are all set to be greater than or equal to 1.7, so as to further improve the imaging quality of the lens.

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, and the focal length are all millimeters (mm).

TABLE 1

Wherein f is the total effective focal length of the optical imaging lens, TTL is the distance on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S19 of the optical imaging lens, ImgH is half of the diagonal length of the effective pixel area on the imaging surface S19 of the optical imaging lens, and Semi-FOV is the maximum half field angle of the optical imaging lens.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 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 h along the direction parallel to the optical axis; 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 coefficient A of each of the aspherical mirror surfaces S1 to S16 which can be used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-8.2229E-02

1.4297E-02

1.1171E-02

-8.5260E-03

3.0875E-03

-7.6208E-04

1.3353E-04

-1.4588E-05

7.1628E-07

S2

-5.6227E-02

1.4038E-02

1.8252E-02

-3.4817E-02

2.5249E-02

-1.0083E-02

2.4113E-03

-3.3500E-04

2.1072E-05

S3

-5.2783E-02

9.1566E-02

-8.8521E-02

5.0126E-02

-2.1889E-02

8.5547E-03

-2.4703E-03

4.0912E-04

-2.8251E-05

S4

-2.2057E-01

3.0932E-01

-3.4463E-01

2.8479E-01

-1.6765E-01

6.6878E-02

-1.6944E-02

2.4450E-03

-1.5230E-04

S5

-1.1006E-01

1.9137E-01

-2.3761E-01

2.2187E-01

-1.5028E-01

7.1093E-02

-2.2749E-02

4.3910E-03

-3.7154E-04

S6

2.9374E-02

-5.2088E-03

2.9163E-04

-1.4605E-02

3.6087E-02

-3.8105E-02

2.0650E-02

-5.7248E-03

6.5917E-04

S7

-7.3857E-02

4.0311E-02

-3.3817E-02

-1.1787E-02

7.4564E-02

-1.0746E-01

7.9077E-02

-2.9252E-02

4.2259E-03

S8

-8.8928E-02

2.5427E-02

8.9232E-02

-3.5014E-01

6.3949E-01

-7.1852E-01

4.9834E-01

-1.9437E-01

3.2381E-02

S9

-3.0273E-02

-2.5389E-02

9.3705E-02

-2.4798E-01

3.8480E-01

-3.6226E-01

2.0327E-01

-6.0911E-02

6.8361E-03

S10

-5.8231E-03

-4.5328E-02

1.3650E-01

-3.7264E-01

6.5376E-01

-7.2037E-01

4.8791E-01

-1.8614E-01

3.0565E-02

S11

-6.8260E-04

2.9625E-03

-1.5674E-02

3.1888E-02

-5.5692E-02

6.7792E-02

-5.1479E-02

2.1500E-02

-3.5886E-03

S12

-1.5439E-02

-5.4581E-03

-5.0954E-03

2.5821E-02

-4.4886E-02

3.7213E-02

-1.4054E-02

9.2603E-04

5.8548E-04

S13

-1.1063E-02

-1.2219E-02

8.5743E-03

-1.2850E-02

1.1496E-02

-6.3490E-03

2.1447E-03

-4.1245E-04

3.5168E-05

S14

-1.0629E-02

-8.4161E-04

-3.2776E-03

2.6549E-03

-1.1383E-03

3.3258E-04

-5.9685E-05

5.7233E-06

-2.2347E-07

S15

1.0605E-02

-9.7190E-03

3.2973E-03

-5.6788E-04

5.9799E-05

-4.0495E-06

1.7339E-07

-4.2967E-09

4.7123E-11

S16

-1.4743E-02

-6.3657E-04

6.2527E-04

-1.5331E-04

2.1243E-05

-1.8436E-06

9.8241E-08

-2.8817E-09

3.4887E-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, in order from an object side to an image side along an optical axis, comprises: the image sensor includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image plane S19.

The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19. Wherein the center thickness of any one of the first lens E1 to the eighth lens E8 on the optical axis is less than 1 mm.

In the present embodiment, the refractive indexes of the third lens element E3, the fifth lens element E5 and the seventh lens element E7 are all set to be greater than or equal to 1.7, so as to further improve the imaging quality of the lens barrel.

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, 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

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, in order from an object side to an image side along an optical axis, comprises: the image sensor includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image plane S19.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19. Wherein the center thickness of any one of the first lens E1 to the eighth lens E8 on the optical axis is less than 1 mm.

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, and the focal length are all millimeters (mm). Table 6 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

S1

-8.1744E-02

1.7837E-02

1.1334E-02

-1.1557E-02

5.7066E-03

-1.8961E-03

4.1108E-04

-5.1063E-05

2.7172E-06

S2

-5.2510E-02

9.2346E-03

2.6299E-02

-4.1708E-02

2.7551E-02

-9.7625E-03

1.9472E-03

-2.1012E-04

9.9100E-06

S3

-4.8673E-02

7.3354E-02

-5.2820E-02

1.1296E-02

4.3556E-03

-2.8966E-03

6.6972E-04

-8.2281E-05

5.1830E-06

S4

-2.2020E-01

3.0233E-01

-3.1696E-01

2.4097E-01

-1.2912E-01

4.6624E-02

-1.0631E-02

1.3711E-03

-7.5720E-05

S5

-1.0933E-01

1.9399E-01

-2.3610E-01

2.0743E-01

-1.3190E-01

5.9500E-02

-1.8549E-02

3.5614E-03

-3.0515E-04

S6

3.8662E-02

-3.2408E-02

5.1003E-02

-7.4965E-02

7.9322E-02

-5.4614E-02

2.2719E-02

-5.2057E-03

5.1343E-04

S7

-6.2379E-02

4.7383E-03

1.1556E-02

-3.1980E-02

3.3936E-02

-1.7938E-02

2.6008E-03

1.5756E-03

-5.7053E-04

S8

-7.9342E-02

3.2451E-02

-4.3338E-02

7.9592E-02

-1.4146E-01

1.7299E-01

-1.2862E-01

5.1956E-02

-8.7475E-03

S9

-2.8076E-02

-9.0935E-03

1.5051E-03

1.6756E-02

-2.6239E-02

1.7030E-02

-3.0963E-03

-1.7748E-03

6.5259E-04

S10

-1.2612E-02

-1.5328E-02

8.1527E-03

5.7810E-03

-1.8937E-02

2.0567E-02

-1.2120E-02

3.7733E-03

-4.9621E-04

S11

2.6584E-03

6.8738E-03

-3.2951E-02

6.8019E-02

-9.7973E-02

9.1803E-02

-5.3054E-02

1.6993E-02

-2.2390E-03

S12

-1.0675E-02

-6.8554E-03

1.8761E-02

-4.6716E-02

6.8080E-02

-6.3150E-02

3.6149E-02

-1.1681E-02

1.6470E-03

S13

-9.6794E-03

9.8867E-03

-1.5264E-02

8.0311E-03

-2.3404E-03

3.5518E-04

-9.5232E-06

-5.5103E-06

7.7227E-07

S14

-2.1374E-02

1.9699E-02

-1.9575E-02

9.9053E-03

-3.0613E-03

6.2709E-04

-8.2356E-05

6.1835E-06

-2.0000E-07

S15

2.1874E-02

-1.9484E-02

7.1338E-03

-1.4081E-03

1.6930E-04

-1.2822E-05

5.9972E-07

-1.5877E-08

1.8243E-10

S16

-2.9671E-02

2.9627E-03

2.2763E-04

-1.4254E-04

2.3994E-05

-2.2025E-06

1.1682E-07

-3.3348E-09

3.9484E-11

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, in order from an object side to an image side along an optical axis, comprises: the image sensor includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image plane S19.

The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19. Wherein the center thickness of any one of the first lens E1 to the eighth lens E8 on the optical axis is less than 1 mm.

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, 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

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, in order from an object side to an image side along an optical axis, comprises: the image sensor includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image plane S19.

The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19. Wherein the center thickness of any one of the first lens E1 to the eighth lens E8 on the optical axis is less than 1 mm.

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, 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

S1

-7.6179E-02

4.1120E-03

2.4188E-02

-1.7937E-02

7.1756E-03

-1.8736E-03

3.1970E-04

-3.2250E-05

1.4511E-06

S2

-4.7284E-02

-1.9072E-02

6.6885E-02

-7.8017E-02

5.0760E-02

-1.9916E-02

4.7024E-03

-6.1840E-04

3.4834E-05

S3

-4.5156E-02

5.2678E-02

1.9801E-05

-5.5721E-02

5.2017E-02

-2.2753E-02

5.3871E-03

-6.4729E-04

2.8655E-05

S4

-2.1992E-01

3.0020E-01

-2.9451E-01

2.0414E-01

-1.0158E-01

3.5939E-02

-8.7236E-03

1.3329E-03

-9.7565E-05

S5

-1.1831E-01

2.0447E-01

-2.5452E-01

2.3498E-01

-1.6053E-01

7.9274E-02

-2.6792E-02

5.3860E-03

-4.6618E-04

S6

7.2722E-02

-9.3478E-02

1.1635E-01

-1.2559E-01

1.0890E-01

-6.7582E-02

2.6838E-02

-6.0566E-03

6.0035E-04

S7

-5.1673E-02

2.4759E-02

-2.1719E-02

-3.5317E-02

1.4342E-01

-2.0692E-01

1.5405E-01

-5.8812E-02

9.0566E-03

S8

-1.4123E-01

1.6742E-01

-2.6786E-01

3.1775E-01

-2.4280E-01

8.7491E-02

1.3572E-02

-2.2946E-02

5.5798E-03

S9

-2.4860E-02

-3.3779E-02

-2.7575E-03

3.9203E-02

-5.0485E-02

6.3168E-02

-6.7957E-02

4.1701E-02

-1.0405E-02

S10

5.4825E-03

-5.8822E-02

6.7581E-02

-1.0686E-01

1.8262E-01

-2.0730E-01

1.4140E-01

-5.3355E-02

8.6611E-03

S11

-1.7683E-03

4.6669E-03

-4.1443E-02

1.0200E-01

-1.7009E-01

1.7872E-01

-1.1278E-01

3.7982E-02

-4.9067E-03

S12

-1.1633E-02

-2.9109E-02

9.2421E-02

-2.1965E-01

3.3338E-01

-3.2588E-01

1.9726E-01

-6.7370E-02

9.9689E-03

S13

-2.9519E-03

-1.1432E-02

2.0215E-04

1.2774E-03

-1.4683E-03

7.7882E-04

-2.2023E-04

2.5294E-05

1.0223E-07

S14

-5.2800E-03

3.9630E-03

-7.0560E-03

3.8514E-03

-1.2200E-03

2.4711E-04

-3.0581E-05

2.0707E-06

-5.8261E-08

S15

1.5719E-02

-1.2000E-02

3.5335E-03

-5.3391E-04

5.0050E-05

-3.1587E-06

1.3598E-07

-3.6673E-09

4.5946E-11

S16

-1.6810E-02

9.0462E-04

-1.4019E-04

6.8250E-05

-1.9735E-05

2.9970E-06

-2.5341E-07

1.1324E-08

-2.0731E-10

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, in order from an object side to an image side along an optical axis, comprises: the image sensor includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image plane S19.

The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a convex image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19. Wherein the center thickness of any one of the first lens E1 to the eighth lens E8 on the optical axis is less than 1 mm.

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, 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

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, in order from an object side to an image side along an optical axis, comprises: the image sensor includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image plane S19.

The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19. Wherein the center thickness of any one of the first lens E1 to the eighth lens E8 on the optical axis is less than 1 mm.

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, 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

S1

-7.5269E-02

-1.4835E-03

2.8368E-02

-1.8583E-02

6.5597E-03

-1.4693E-03

2.1010E-04

-1.7576E-05

6.5468E-07

S2

-4.7979E-02

-1.8220E-02

6.5926E-02

-7.7525E-02

5.0503E-02

-1.9645E-02

4.5477E-03

-5.7878E-04

3.1008E-05

S3

-6.0547E-02

1.0873E-01

-9.3035E-02

3.9082E-02

-1.0740E-02

4.2044E-03

-1.8168E-03

4.3241E-04

-4.0082E-05

S4

-2.2952E-01

3.4273E-01

-4.0838E-01

3.5259E-01

-2.1295E-01

8.7219E-02

-2.3053E-02

3.5568E-03

-2.4396E-04

S5

-1.0008E-01

1.9004E-01

-2.6047E-01

2.4763E-01

-1.6282E-01

7.4521E-02

-2.3419E-02

4.5010E-03

-3.8189E-04

S6

5.0694E-02

-4.2153E-02

4.8440E-02

-8.8522E-02

1.2265E-01

-1.0163E-01

4.8540E-02

-1.2488E-02

1.3605E-03

S7

-4.1927E-02

-2.6333E-03

1.2017E-02

-9.4566E-02

1.8547E-01

-1.8744E-01

1.0356E-01

-2.8944E-02

3.0239E-03

S8

-7.7397E-02

1.8868E-02

3.6819E-02

-2.5906E-01

5.1360E-01

-5.5306E-01

3.4359E-01

-1.1390E-01

1.5224E-02

S9

-3.6222E-02

-5.3863E-04

-9.9685E-02

2.8778E-01

-5.4999E-01

7.0832E-01

-5.5736E-01

2.4095E-01

-4.4265E-02

S10

-1.0560E-02

-1.6191E-02

1.8943E-02

-5.3619E-02

1.0417E-01

-9.0405E-02

4.2664E-02

-1.3296E-02

2.5344E-03

S11

-6.6745E-03

-1.0235E-02

3.1749E-02

-1.0179E-01

1.7214E-01

-1.6202E-01

8.4153E-02

-2.1516E-02

2.0982E-03

S12

-1.1636E-02

-2.9945E-02

4.2434E-02

-4.9041E-02

3.3725E-02

-1.4360E-02

5.7369E-03

-2.8656E-03

7.8555E-04

S13

7.8154E-03

-5.5310E-02

7.2781E-02

-9.7551E-02

9.0853E-02

-5.4978E-02

2.0525E-02

-4.2982E-03

3.8533E-04

S14

2.4250E-02

-2.3188E-02

8.7968E-03

-2.4320E-03

5.8098E-04

-1.1351E-04

1.5293E-05

-1.1832E-06

3.8843E-08

S15

8.2739E-03

-8.5084E-03

3.3504E-03

-6.6998E-04

8.1780E-05

-6.3295E-06

3.0116E-07

-7.8988E-09

8.3935E-11

S16

-1.7015E-02

1.8420E-03

-7.2325E-04

2.7631E-04

-6.5498E-05

9.0412E-06

-7.2277E-07

3.1098E-08

-5.5536E-10

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, in order from an object side to an image side along an optical axis, comprises: the image sensor includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image plane S19.

The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has positive power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19. Wherein the center thickness of any one of the first lens E1 to the eighth lens E8 on the optical axis is less than 1 mm.

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, 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

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.

In summary, examples 1 to 8 each satisfy the relationship shown in table 17.

Conditions/examples	1	2	3	4	5	6	7	8
									TTL/ImgH	1.23	1.25	1.25	1.23	1.23	1.25	1.25	1.25
f1/f8	1.73	1.96	1.90	1.52	1.81	1.86	1.67	2.05
									f/f3	1.87	1.55	1.77	1.45	2.19	1.83	1.74	1.76
f6/f	1.77	1.69	1.98	1.96	1.63	1.90	1.62	1.87
									f/EPD	2.20	2.20	2.20	2.20	2.20	2.20	2.20	2.20
R4/R5	1.57	1.62	1.93	2.03	1.55	1.55	1.33	2.00
									R7/R8	0.53	0.43	0.43	0.47	1.05	0.51	0.81	0.45
R9/R10	2.10	1.89	2.42	2.47	1.72	2.24	1.00	2.45
									(T67+T78)/TTL	0.33	0.27	0.33	0.31	0.31	0.34	0.27	0.33
ImgH(mm)	5.30	5.21	5.21	5.30	5.30	5.21	5.21	5.21
									Semi-FOV(°)	50.6	50.0	50.0	50.5	50.6	50.0	50.0	50.0

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 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: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having optical power,

the first lens has a negative optical power;

the third lens and the sixth lens each have a positive optical power;

the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface;

the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; and

the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens meet the condition that TTL/ImgH is less than or equal to 1.25.

2. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens satisfy 1.5 < f1/f8 < 2.5.

3. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the effective focal length f3 of the third lens satisfy 1.4 < f/f3 < 2.5.

4. The optical imaging lens of claim 1, wherein the effective focal length f6 of the sixth lens and the total effective focal length f of the optical imaging lens satisfy 1.5 < f6/f < 2.0.

5. 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 < 2.5.

6. The optical imaging lens of claim 1, wherein a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R8 of an image-side surface of the fourth lens satisfy 0 < R7/R8 < 1.5.

7. The optical imaging lens of claim 1, wherein a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens satisfy 1 ≦ R9/R10 < 2.5.

8. The optical imaging lens of claim 1, wherein a radius of curvature R4 of the image-side surface of the second lens and a radius of curvature R5 of the object-side surface of the third lens satisfy 1.0 < R4/R5 < 2.5.

9. The optical imaging lens of claim 1, wherein an air interval T67 of the sixth lens and the seventh lens on the optical axis and an air interval T78 of the seventh lens and the eighth lens on the optical axis satisfy 0 < (T67+ T78)/TTL < 0.5.

10. The optical imaging lens according to any one of claims 1 to 9, characterized in that refractive indices of at least three lenses of the first to eighth lenses are greater than or equal to 1.7.

11. The optical imaging lens according to any one of claims 1 to 9, characterized in that a center thickness of any one of the first to eighth lenses on the optical axis is less than 1 mm.

12. The optical imaging lens according to any one of claims 1 to 9, wherein ImgH, which is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, satisfies ImgH ≧ 5 mm.

13. The optical imaging lens according to any one of claims 1 to 9, wherein the maximum half field angle Semi-FOV of the optical imaging lens satisfies Semi-HFOV ≧ 50 °.

14. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens having optical power,

the first lens has a negative optical power;

the third lens and the sixth lens each have a positive optical power;

the effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens satisfy 1.5 < f1/f8 < 2.5.

15. The optical imaging lens of claim 14, wherein the total effective focal length f of the optical imaging lens and the effective focal length f3 of the third lens satisfy 1.4 < f/f3 < 2.5.

16. The optical imaging lens of claim 15, wherein a distance TTL between an object side surface of the first lens element and an imaging surface of the optical imaging lens on the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens satisfy TTL/ImgH ≦ 1.25.

17. The optical imaging lens of claim 14, wherein the effective focal length f6 of the sixth lens and the total effective focal length f of the optical imaging lens satisfy 1.5 < f6/f < 2.0.

18. The optical imaging lens of claim 14 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 < 2.5.

19. The optical imaging lens of claim 14, wherein a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R8 of an image-side surface of the fourth lens satisfy 0 < R7/R8 < 1.5.

20. The optical imaging lens of claim 14, wherein a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens satisfy 1 ≦ R9/R10 < 2.5.

21. The optical imaging lens of claim 14, wherein a radius of curvature R4 of the image side surface of the second lens and a radius of curvature R5 of the object side surface of the third lens satisfy 1.0 < R4/R5 < 2.5.

22. The optical imaging lens of claim 14, wherein an air interval T67 of the sixth lens and the seventh lens on the optical axis and an air interval T78 of the seventh lens and the eighth lens on the optical axis satisfy 0 < (T67+ T78)/TTL < 0.5.

23. The optical imaging lens according to any one of claims 14 to 22, wherein refractive indices of at least three lenses of the first to eighth lenses are greater than or equal to 1.7.

24. The optical imaging lens according to any one of claims 14 to 22, characterized in that a center thickness of any one of the first to eighth lenses on the optical axis is less than 1 mm.

25. The optical imaging lens according to any one of claims 14 to 22, wherein the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies ImgH ≧ 5 mm.

26. The optical imaging lens according to any one of claims 14 to 22, wherein the maximum half field angle Semi-FOV of the optical imaging lens satisfies Semi-HFOV ≧ 50 °.