CN107167900B

CN107167900B - Optical imaging lens

Info

Publication number: CN107167900B
Application number: CN201710609177.5A
Authority: CN
Inventors: 宋博
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2017-07-25
Filing date: 2017-07-25
Publication date: 2022-09-06
Anticipated expiration: 2037-07-25
Also published as: CN107167900A

Abstract

The application discloses an optical imaging lens, this optical imaging lens includes along the optical axis from the object side to the image side in proper order: the lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has positive focal power or negative focal power; the third lens has negative focal power; the fourth lens has positive focal power; the fifth lens has negative focal power, and the image side surface of the fifth lens is a convex surface; and the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the condition that f/EPD is less than or equal to 1.9.

Description

Optical imaging lens

Technical Field

The present application relates to an optical imaging lens, and more particularly, to an optical imaging lens including five lenses.

Background

With the development of science and technology, portable electronic products are gradually emerging, and portable electronic products with a camera shooting function are more popular, so that the market demand for camera lenses suitable for portable electronic products is gradually increased. As portable electronic products tend to be miniaturized, the total length of the lens is limited, thereby increasing the design difficulty of the lens.

Meanwhile, with the improvement of the performance and the reduction of the size of a common photosensitive element such as a photosensitive coupling element (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), the number of pixels of the photosensitive element is increased and the size of the pixels is reduced, thereby providing higher requirements for the high imaging quality and the miniaturization of a matched optical imaging lens.

The reduction in the size of the picture element means that the amount of light transmitted by the lens will be smaller for the same exposure time. However, in a dark environment (e.g., rainy days, dusk, etc.), the lens needs to have a large amount of light to ensure the imaging quality. The f-number Fno (total effective focal length of the lens/entrance pupil diameter of the lens) of the conventional lens is 2.0 or more than 2.0. Although the lens can meet the miniaturization requirement, the imaging quality of the lens cannot be guaranteed under the condition of insufficient light, so that the lens with the f-number Fno of 2.0 or more than 2.0 cannot meet the higher-order imaging requirement.

Disclosure of Invention

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.

An aspect of the present application provides an optical imaging lens, comprising, in order from an object side to an image side along an optical axis: the lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface, and the image side surface of the first lens can be a concave surface; the second lens has positive focal power or negative focal power; the third lens may have a negative optical power; the fourth lens may have a positive optical power; the fifth lens element has negative focal power, and the image-side surface thereof can be convex; and the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy f/EPD is less than or equal to 1.9.

In one embodiment, the combined focal power of the first lens and the second lens is positive focal power, and the combined focal length f12 and the total effective focal length f of the optical imaging lens can satisfy 0.8 < f/f12 < 1.2.

In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens can satisfy f/| f2| ≦ 0.1.

In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens can satisfy 1.3 ≦ f/f4 ≦ 1.6.

In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens can satisfy-1.8 ≦ f/f5 ≦ -1.5.

In one embodiment, the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R6 of the image-side surface of the third lens satisfy R2/R6| ≦ 0.1.

In one embodiment, the radius of curvature R6 of the image-side surface of the third lens and the radius of curvature R7 of the object-side surface of the fourth lens can satisfy 0 ≦ R6/R7 < 10.

In one embodiment, the central thickness CT3 of the third lens on the optical axis and the curvature radius R5 of the object-side surface of the third lens can satisfy CT3/| R5| < 0.1.

In one embodiment, the total effective focal length f of the optical imaging lens and the central thickness CT4 of the fourth lens on the optical axis satisfy 6 < f/CT4 < 9.

In one embodiment, the distance TTL between the center of the object side surface of the first lens element and the imaging surface of the optical imaging lens along 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 satisfy TTL/ImgH < 1.6.

Another aspect of the present application provides an optical imaging lens, comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. At least one of the first lens and the fourth lens may have a positive optical power; at least one of the third lens and the fifth lens may have a negative optical power; the second lens has positive focal power or negative focal power, and the effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens can meet the condition that f/| f2| is less than or equal to 0.1; and the combined focal power of the first lens and the second lens can be positive focal power, and the combined focal length f12 and the total effective focal length f of the optical imaging lens can satisfy 0.8 < f/f12 < 1.2.

In one embodiment, the object-side surface of the first lens element can be convex and the image-side surface can be concave.

In one embodiment, the image side surface of the fifth lens element can be convex.

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

In one embodiment, the third lens and the fifth lens may each have a negative optical power.

In one embodiment, the central thickness of the third lens along the optical axis CT3 and the radius of curvature of the object-side surface R5 of the third lens satisfy CT3/| R5| < 0.1.

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 can satisfy f/EPD ≦ 1.9.

Another 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 lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface, and the image side surface of the first lens can be a concave surface; the second lens has positive focal power or negative focal power; the third lens may have a negative optical power; the fourth lens may have a positive optical power; the fifth lens can have negative focal power, and the image side surface of the fifth lens can be a convex surface; and the total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens can satisfy f/f4 is more than or equal to 1.3 and less than or equal to 1.6.

Another aspect of the present application provides an optical imaging lens, comprising, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens element has positive focal power, and has a convex object-side surface and a concave image-side surface; the second lens has positive focal power or negative focal power; the third lens may have a negative optical power; the fourth lens may have a positive optical power; the fifth lens element has negative focal power, and the image-side surface thereof can be convex; and the curvature radius R2 of the image side surface of the first lens and the curvature radius R6 of the image side surface of the third lens can satisfy | R2/R6| ≦ 0.1.

The system adopts a plurality of (for example, five) lenses, and reasonably distributes the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, so that the system has the advantage of large aperture in the process of increasing the light transmission amount, and the imaging effect in a dark environment is enhanced while the marginal ray aberration is improved. Meanwhile, the optical imaging lens configured as above can have at least one beneficial effect of being ultra-thin, miniaturized, large aperture, low sensitivity, small distortion, high 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 axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a relative illuminance curve of the optical imaging lens of embodiment 1, respectively;

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

fig. 4A to 4D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a relative illuminance curve of the optical imaging lens of embodiment 2, respectively;

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 axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a relative illuminance curve of the optical imaging lens of embodiment 3, respectively;

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

fig. 8A to 8D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 4;

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

fig. 10A to 10D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 5;

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

fig. 12A to 12D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a relative illuminance curve of the optical imaging lens of embodiment 6, respectively;

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

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 relative illuminance 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, and the surface of each lens closest to the image plane is called the image side surface.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to 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 includes, for example, five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The optical imaging lens can further comprise a photosensitive element arranged on the imaging surface.

The first lens element can have a positive power, and can have a convex object-side surface and a concave image-side surface.

The second lens has positive focal power or negative focal power, and the object side surface of the second lens can be a convex surface, and the image side surface of the second lens can be a concave surface.

The third lens element may have a negative optical power and the object side surface may be concave.

The fourth lens element can have a positive optical power, and the image-side surface thereof can be convex.

The fifth lens element can have a negative power, and can have a concave object-side surface and a convex image-side surface.

f/EPD ≦ 1.9 may be satisfied between the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens, and more specifically, f and EPD may further satisfy 1.79 ≦ f/EPD ≦ 1.88. The smaller the f-number Fno of the optical imaging lens (i.e., the total effective focal length f of the lens/the entrance pupil diameter EPD of the lens), the larger the clear aperture of the lens, the more the amount of light entering in the same unit time. The reduction of the f-number Fno can effectively improve the brightness of the image plane, so that the lens can better meet the shooting requirement when the light is insufficient. The f/EPD satisfying the conditional expression is less than or equal to 1.9, and the lens has the advantage of large aperture in the process of increasing the light transmission quantity, so that the imaging effect in a dark environment is enhanced while the marginal light aberration is improved. In addition, satisfying above-mentioned configuration still is favorable to improving senior coma and astigmatism, promotes the imaging quality of camera lens, reduces the tolerance sensitivity of camera lens.

The total effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens can satisfy f/| f2| ≦ 0.1, and more specifically, f and f2 can further satisfy 0.01 ≦ f/| f2| ≦ 0.09. The focal power of the second lens is controlled within a certain positive and negative range, so that the spherical aberration is improved and the chromatic aberration is controlled.

Optionally, the combined optical power of the first lens and the second lens is a positive optical power. The total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens may satisfy 0.8 < f/f12 < 1.2, and more specifically, f and f12 may further satisfy 0.94 ≦ f/f12 ≦ 1.01. The total focal power of the lens is controlled by controlling the combined focal power of the first lens and the second lens.

The total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens can satisfy 1.3 ≦ f/f4 ≦ 1.6, and more specifically, f and f4 can further satisfy 1.38 ≦ f/f4 ≦ 1.55. By controlling the focal power of the fourth lens within a reasonable range, field curvature, distortion and other field-related aberrations can be effectively controlled, so that the lens has good imaging quality.

The total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens can satisfy-1.8 ≤ f/f5 ≤ 1.5, and more specifically, f and f5 can further satisfy-1.77 ≤ f/f5 ≤ 1.64. By controlling the focal power of the fifth lens within a reasonable range, the distortion of the system can be effectively controlled, and the imaging quality is improved.

The radius of curvature R2 of the image-side surface of the first lens element and the radius of curvature R6 of the image-side surface of the third lens element can satisfy | R2/R6| ≦ 0.1, and more specifically, R2 and R6 can further satisfy 0.01 ≦ R2/R6| ≦ 0.07. The light direction is controlled by controlling the bending direction and the bending degree of the image side surface of the first lens and the image side surface of the third lens, so that the purpose of correcting the field curvature of the system is achieved.

The radius of curvature R6 of the image-side surface of the third lens and the radius of curvature R7 of the object-side surface of the fourth lens can satisfy 0 ≦ R6/R7 < 10, and more specifically, R6 and R7 can further satisfy 0 ≦ R6/R7 ≦ 9.62. The trend of the marginal light is controlled by controlling the bending direction and the bending degree of the image side surface of the third lens and the object side surface of the fourth lens, so that the purpose of improving the relative illumination of the edge is achieved.

The central thickness CT3 of the third lens on the optical axis and the curvature radius R5 of the object side surface of the third lens can satisfy CT3/| R5| < 0.1, more specifically, CT3 and R5 can further satisfy 0.02 ≦ CT3/| R5| ≦ 0.03, so that the third lens has better workability.

The total effective focal length f of the optical imaging lens and the central thickness CT4 of the fourth lens on the optical axis can satisfy 6 < f/CT4 < 9, more specifically, f and CT4 can further satisfy 6.75 ≦ f/CT4 ≦ 8.23. By controlling the ratio of the total effective focal length of the lens to the central thickness of the fourth lens within a certain range, the chromatic aberration of the system can be effectively corrected and the distortion and the meridian direction coma can be improved. Meanwhile, the conditional expression 6 < f/CT4 < 9 is satisfied, which is also beneficial to molding manufacture.

The total optical length TTL (namely, the on-axis distance from the center of the object side surface of the first lens to the imaging surface of the optical imaging lens) of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens can meet the condition that the TTL/ImgH is less than 1.6, and more particularly, the TTL and the ImgH can further meet the condition that the TTL/the ImgH is less than or equal to 1.38 and less than or equal to 1.50. The TTL/ImgH satisfying the condition is less than 1.6, the total optical length of the lens can be effectively compressed while the lens is ensured to have a larger imaging area, so that the ultrathin characteristic and the miniaturization of the lens are realized, and the imaging lens can be better suitable for systems with limited sizes such as portable electronic products and the like.

In an exemplary embodiment, the optical imaging lens may further be provided with at least one diaphragm. The stop may be disposed at any position between the object side and the image side as required, for example, the stop may be disposed between the object side and the first lens element, so as to further improve the imaging quality of the 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, five lenses as described above. The optical imaging lens is more beneficial to production and processing and is suitable for portable electronic products 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 so as to reduce the sensitivity of the lens and improve the processability of the lens while ensuring the miniaturization of the lens. Meanwhile, the optical imaging lens with the configuration has the advantages of being ultrathin, large in aperture, small in distortion, high in imaging quality and the like.

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

However, it will be appreciated by those skilled in the art that the number of lenses constituting an 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 five lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five 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 imaging side along an optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S13.

The first lens element E1 has positive power, the object-side surface S1 is convex, the image-side surface S2 is concave, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric.

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

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

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

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

Optionally, the optical imaging lens may further include a filter E6 having an object-side surface S11 and an image-side surface S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Optionally, the optical imaging lens may further include a stop STO disposed between the object side and the first lens E1 to improve the imaging quality.

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

TABLE 1

The radius of curvature R2 of the image-side surface S2 of the first lens E1 and the radius of curvature R6 of the image-side surface S6 of the third lens E3 satisfy | R2/R6| -0.02; the radius of curvature R6 of the image side S6 of the third lens E3 and the radius of curvature R7 of the object side S7 of the fourth lens E4 satisfy that R6/R7 is 1.66; the central thickness CT3 of the third lens E3 on the optical axis and the radius of curvature R5 of the object side S5 of the third lens E3 satisfy CT3/| R5| ═ 0.03.

The embodiment adopts five lenses as an example, and reasonably distributes the focal length of each lens, the surface type of each lens, the center thickness of each lens and the spacing distance between each lens, thereby realizing the miniaturization of the lens, increasing the light flux of the lens and improving the imaging quality of the lens. Each aspherical surface type x is defined by the following formula:

wherein x is the height of the aspheric surface in the optical axis directionh is the distance from the vertex of the aspheric surface to the rise; 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 the conic coefficient (given in table 1); 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 S8 used in example 1 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ And A ₂₀ 。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.1221E-03

1.8514E-01

-1.0274E+00

3.4293E+00

-7.1232E+00

9.1575E+00

-7.1153E+00

3.0402E+00

-5.4780E-01

S2

-2.2052E-01

-7.2588E-01

7.1457E+00

-2.4522E+01

4.8722E+01

-6.0875E+01

4.7092E+01

-2.0586E+01

3.8826E+00

S3

-3.0435E-01

-3.3585E-03

5.3007E+00

-2.1912E+01

4.8611E+01

-6.6542E+01

5.6036E+01

-2.6541E+01

5.4027E+00

S4

-6.0497E-02

1.6332E-01

4.6823E-02

3.3556E+00

-2.5384E+01

7.7305E+01

-1.2184E+02

9.8804E+01

-3.2678E+01

S5

-1.5982E-01

-4.5582E-01

4.4375E+00

-2.3628E+01

7.4667E+01

-1.4578E+02

1.7235E+02

-1.1329E+02

3.1885E+01

S6

-1.8505E-01

-1.8437E-03

2.1344E-01

-7.1044E-01

8.3569E-01

-1.4990E-01

-5.5576E-01

5.0415E-01

-1.3195E-01

S7

-8.9827E-02

-6.1408E-02

1.5784E-01

-3.5433E-01

4.4453E-01

-3.7713E-01

2.1282E-01

-6.6180E-02

8.2856E-03

S8

7.0162E-02

-2.1532E-01

4.2455E-01

-5.4701E-01

4.4021E-01

-2.1118E-01

5.8458E-02

-8.5959E-03

5.1749E-04

S9

-3.6513E-02

-7.3053E-02

1.3250E-01

-8.5837E-02

3.1449E-02

-7.1056E-03

9.7946E-04

-7.5472E-05

2.4906E-06

S10

9.0482E-02

-1.5381E-01

1.2409E-01

-6.3979E-02

2.1638E-02

-4.7940E-03

6.6913E-04

-5.3092E-05

1.8155E-06

TABLE 2

Table 3 below gives the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging lens, and the total optical length TTL of the optical imaging lens (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens E1 to the imaging surface S13) in embodiment 1.

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)	f(mm)	TTL(mm)
								Numerical value	4.13	-87.58	-23.67	2.56	-2.25	3.98	4.50

TABLE 3

F/| f2| -0.05 is satisfied between the total effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens E2; f/f4 is equal to 1.55 between the total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens E4; f/f5 is equal to-1.77 between the total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens E5; the total effective focal length f of the optical imaging lens and the central thickness CT4 of the fourth lens E4 on the optical axis satisfy f/CT 4-6.75.

In embodiment 1, f/EPD of 1.88 is satisfied between the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens; f/f12 is equal to 0.96 between the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens; the total optical length TTL 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 that TTL/ImgH is 1.38.

Fig. 2A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 1, which represent 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 the distortion magnitude values in the case of different angles of view. Fig. 2D shows a relative illuminance curve of the optical imaging lens according to embodiment 1, which represents the relative illuminance corresponding to different image heights on the imaging surface. 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S13.

Optionally, the optical imaging lens may further include a filter E6 having an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 2, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 5 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 6 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging lens, and the total optical length TTL of the optical imaging lens in embodiment 2.

TABLE 4

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.1411E-02

2.0326E-01

-1.0375E+00

3.1071E+00

-5.7675E+00

6.6580E+00

-4.6736E+00

1.8121E+00

-2.9627E-01

S2

-1.9165E-01

-6.2634E-01

5.2365E+00

-1.5590E+01

2.6410E+01

-2.7676E+01

1.7765E+01

-6.4041E+00

9.9228E-01

S3

-2.6231E-01

-1.3989E-01

4.6309E+00

-1.6603E+01

3.2291E+01

-3.8562E+01

2.8267E+01

-1.1653E+01

2.0674E+00

S4

-1.5736E-02

-4.1831E-04

8.8383E-01

-1.4735E+00

-4.0921E+00

1.9130E+01

-2.9534E+01

2.0791E+01

-5.4633E+00

S5

-2.2074E-01

6.0381E-01

-2.7381E+00

7.3759E+00

-1.1392E+01

7.4625E+00

3.1220E+00

-7.7190E+00

3.3734E+00

S6

-1.6636E-01

1.0005E-01

-3.7505E-01

1.0183E+00

-1.9285E+00

2.2883E+00

-1.6304E+00

6.4024E-01

-1.0467E-01

S7

-1.4424E-01

3.0281E-01

-8.2422E-01

1.1823E+00

-1.0304E+00

5.1596E-01

-1.2497E-01

7.2118E-03

1.2982E-03

S8

2.8596E-02

-4.2389E-02

1.5050E-01

-3.2723E-01

3.5441E-01

-2.0305E-01

6.3877E-02

-1.0496E-02

7.0648E-04

S9

-1.9734E-02

-6.9624E-02

7.6728E-02

-2.4803E-02

4.0853E-04

1.7289E-03

-4.7246E-04

5.3971E-05

-2.3801E-06

S10

5.5663E-02

-9.3837E-02

6.3208E-02

-2.6729E-02

7.3297E-03

-1.3175E-03

1.5126E-04

-1.0111E-05

3.0202E-07

TABLE 5

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)	f(mm)	TTL(mm)
								Numerical value	4.01	-53.11	-25.55	2.64	-2.33	3.98	4.50

TABLE 6

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 the distortion magnitude values in the case of different angles of view. Fig. 4D shows a relative illuminance curve of the optical imaging lens according to embodiment 2, which represents the relative illuminance corresponding to different image heights on the imaging surface. 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S13.

The first lens element E1 has positive power, and has a convex object-side surface S1, a concave image-side surface S2, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric.

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

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

Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 3, wherein the units of the radius of curvature and the thickness are both millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 9 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging lens, and the total optical length TTL of the optical imaging lens in embodiment 3.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.1420E-02

2.0312E-01

-1.0321E+00

3.0755E+00

-5.6766E+00

6.5164E+00

-4.5506E+00

1.7555E+00

-2.8559E-01

S2

-1.9489E-01

-6.2836E-01

5.4208E+00

-1.6531E+01

2.8752E+01

-3.1017E+01

2.0535E+01

-7.6458E+00

1.2250E+00

S3

-2.6756E-01

-1.1171E-01

4.6191E+00

-1.6919E+01

3.3469E+01

-4.0617E+01

3.0221E+01

-1.2628E+01

2.2670E+00

S4

-2.0743E-02

1.8765E-02

7.4443E-01

-6.9738E-01

-6.9850E+00

2.5775E+01

-3.8576E+01

2.7469E+01

-7.5330E+00

S5

-2.1772E-01

5.1731E-01

-2.0694E+00

4.4244E+00

-3.4059E+00

-6.0195E+00

1.6915E+01

-1.5499E+01

5.2171E+00

S6

-1.7210E-01

1.4519E-01

-6.2394E-01

1.7820E+00

-3.3460E+00

3.9183E+00

-2.7693E+00

1.0848E+00

-1.7896E-01

S7

-1.5142E-01

3.4726E-01

-9.6390E-01

1.4375E+00

-1.3172E+00

7.1265E-01

-2.0425E-01

2.4366E-02

-2.3484E-04

S8

2.9501E-02

-5.3330E-02

1.7671E-01

-3.5434E-01

3.6733E-01

-2.0514E-01

6.3388E-02

-1.0264E-02

6.8155E-04

S9

-1.7091E-02

-8.5953E-02

1.0673E-01

-5.0251E-02

1.2274E-02

-1.5410E-03

6.1942E-05

5.8585E-06

-5.3540E-07

S10

5.8521E-02

-9.6404E-02

6.3492E-02

-2.5666E-02

6.5375E-03

-1.0483E-03

1.0143E-04

-5.2616E-06

1.0763E-07

TABLE 8

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)	f(mm)	TTL(mm)
								Numerical value	4.02	-50.66	-25.83	2.66	-2.34	3.98	4.50

TABLE 9

Fig. 6A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 3, which represent 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 the distortion magnitude values in the case of different angles of view. Fig. 6D shows a relative illuminance curve of the optical imaging lens according to embodiment 3, which represents the relative illuminance corresponding to different image heights on the imaging surface. 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 configuration 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S13.

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

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

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

TABLE 10

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.0332E-02

2.0390E-01

-1.0644E+00

3.2667E+00

-6.2049E+00

7.3235E+00

-5.2554E+00

2.0830E+00

-3.4830E-01

S2

-2.0111E-01

-6.4361E-01

5.8215E+00

-1.8436E+01

3.3392E+01

-3.7639E+01

2.6120E+01

-1.0221E+01

1.7250E+00

S3

-2.7786E-01

-8.9037E-02

4.8370E+00

-1.8361E+01

3.7555E+01

-4.7172E+01

3.6375E+01

-1.5770E+01

2.9395E+00

S4

-3.3076E-02

4.5750E-02

6.0714E-01

1.6881E-01

-1.0903E+01

3.6217E+01

-5.4427E+01

4.0193E+01

-1.1727E+01

S5

-2.1778E-01

3.8704E-01

-1.0502E+00

-7.0188E-01

1.2731E+01

-3.7769E+01

5.4733E+01

-4.0424E+01

1.2203E+01

S6

-1.7043E-01

8.3952E-02

-3.2693E-01

9.3641E-01

-1.9251E+00

2.4933E+00

-1.9413E+00

8.3431E-01

-1.4939E-01

S7

-1.3170E-01

2.1472E-01

-5.2702E-01

6.0964E-01

-3.6815E-01

4.1541E-02

8.1902E-02

-4.2982E-02

6.4761E-03

S8

3.2475E-02

-9.0158E-02

2.7947E-01

-4.9636E-01

4.7953E-01

-2.5881E-01

7.8809E-02

-1.2714E-02

8.4692E-04

S9

-3.2240E-02

-5.5232E-02

8.3509E-02

-4.1658E-02

1.0838E-02

-1.5624E-03

1.1085E-04

-1.5586E-06

-1.5803E-07

S10

6.4471E-02

-1.0747E-01

7.5997E-02

-3.3902E-02

9.8772E-03

-1.8949E-03

2.3223E-04

-1.6484E-05

5.1520E-07

TABLE 11

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)	f(mm)	TTL(mm)
								Numerical value	4.01	-45.95	-27.88	2.68	-2.34	3.98	4.50

TABLE 12

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 the distortion magnitude values in the case of different angles of view. Fig. 8D shows a relative illuminance curve of the optical imaging lens according to embodiment 4, which represents the relative illuminance corresponding to different image heights on the imaging surface. 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S13.

The fourth lens element E4 has positive power, and has a planar object-side surface S7, a convex image-side surface S8, and aspheric object-side surface S7 and image-side surface S8 of the fourth lens element E4.

Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 5, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 15 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging lens, and the total optical length TTL of the optical imaging lens in embodiment 5.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.0080E-02

2.0714E-01

-1.0925E+00

3.4303E+00

-6.6973E+00

8.1405E+00

-6.0212E+00

2.4619E+00

-4.2524E-01

S2

-2.0949E-01

-6.6330E-01

6.3192E+00

-2.0880E+01

3.9596E+01

-4.6889E+01

3.4256E+01

-1.4129E+01

2.5144E+00

S3

-2.8714E-01

-5.2957E-02

4.9698E+00

-1.9639E+01

4.1702E+01

-5.4428E+01

4.3628E+01

-1.9657E+01

3.8035E+00

S4

-4.5236E-02

1.0601E-01

3.0280E-01

1.6646E+00

-1.7093E+01

5.2917E+01

-8.0712E+01

6.2107E+01

-1.9204E+01

S5

-2.1213E-01

1.4378E-01

9.0617E-01

-1.0293E+01

4.2170E+01

-9.4634E+01

1.2172E+02

-8.4356E+01

2.4515E+01

S6

-1.6253E-01

-7.6146E-02

5.0550E-01

-1.5583E+00

2.6183E+00

-2.6213E+00

1.5317E+00

-4.6810E-01

5.8527E-02

S7

-1.0974E-01

7.1183E-02

-6.3436E-02

-2.7529E-01

6.7823E-01

-7.3220E-01

4.2890E-01

-1.2903E-01

1.5512E-02

S8

3.6545E-02

-1.1101E-01

3.1258E-01

-5.2121E-01

4.8801E-01

-2.5962E-01

7.8651E-02

-1.2698E-02

8.5034E-04

S9

-3.7212E-02

-5.2824E-02

9.3564E-02

-5.4489E-02

1.7635E-02

-3.5213E-03

4.3364E-04

-3.0316E-05

9.2279E-07

S10

7.6205E-02

-1.2926E-01

9.8624E-02

-4.7759E-02

1.5151E-02

-3.1552E-03

4.1580E-04

-3.1329E-05

1.0238E-06

TABLE 14

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)	f(mm)	TTL(mm)
								Numerical value	4.03	-44.81	-28.61	2.69	-2.34	3.98	4.50

Watch 15

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 the distortion magnitude values in the case of different angles of view. Fig. 10D shows a relative illuminance curve of the optical imaging lens according to embodiment 5, which represents the relative illuminance corresponding to different image heights on the imaging surface. 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S13.

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

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

Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 6, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 17 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 18 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging lens, and the total optical length TTL of the optical imaging lens in embodiment 6.

TABLE 16

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-8.3891E-03

2.3549E-01

-1.3655E+00

4.4847E+00

-9.0066E+00

1.1210E+01

-8.4991E+00

3.5706E+00

-6.3401E-01

S2

-2.2761E-01

-8.8180E-01

7.9560E+00

-2.6628E+01

5.1665E+01

-6.2744E+01

4.7009E+01

-1.9859E+01

3.6145E+00

S3

-3.0117E-01

-5.6378E-02

5.3924E+00

-2.1435E+01

4.6114E+01

-6.1358E+01

5.0431E+01

-2.3387E+01

4.6726E+00

S4

-4.0790E-02

1.8354E-01

7.0735E-02

2.0816E+00

-1.7525E+01

5.3193E+01

-8.0101E+01

6.0162E+01

-1.7687E+01

S5

-2.4018E-01

4.8639E-01

-1.6980E-01

-9.6325E+00

4.9490E+01

-1.2137E+02

1.6398E+02

-1.1724E+02

3.4688E+01

S6

-1.7707E-01

7.6046E-03

1.8218E-01

-5.4545E-01

7.6844E-01

-6.8952E-01

4.3837E-01

-1.6221E-01

2.4300E-02

S7

-2.0749E-01

5.6905E-01

-1.8273E+00

3.3230E+00

-3.7966E+00

2.6059E+00

-9.9361E-01

1.8464E-01

-1.1681E-02

S8

8.5104E-02

-3.5251E-01

9.1400E-01

-1.3906E+00

1.2551E+00

-6.7284E-01

2.1064E-01

-3.5628E-02

2.5180E-03

S9

-2.6930E-02

-1.2611E-01

2.1278E-01

-1.4087E-01

5.2788E-02

-1.2201E-02

1.7329E-03

-1.3906E-04

4.8267E-06

S10

3.4457E-02

-5.9888E-02

2.5310E-02

-3.5624E-04

-4.2969E-03

1.9264E-03

-4.0302E-04

4.2529E-05

-1.8114E-06

TABLE 17

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)	f(mm)	TTL(mm)
								Numerical value	4.18	99.52	-33.33	2.89	-2.41	3.98	4.41

Watch 18

Fig. 12A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 6, which represent deviation of convergence focuses 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 the distortion magnitude values in the case of different angles of view. Fig. 12D shows a relative illuminance curve of the optical imaging lens according to embodiment 6, which represents the relative illuminance corresponding to different image heights on the imaging plane. 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 view showing a configuration of 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S13.

Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 7, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 20 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. Table 21 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging lens, and the total optical length TTL of the optical imaging lens in embodiment 7.

Watch 19

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-6.3818E-03

1.7802E-01

-1.0118E+00

3.4147E+00

-7.0881E+00

9.0494E+00

-6.9715E+00

2.9496E+00

-5.2467E-01

S2

-2.1827E-01

-8.0348E-01

7.3372E+00

-2.4531E+01

4.7574E+01

-5.7873E+01

4.3507E+01

-1.8466E+01

3.3804E+00

S3

-3.0135E-01

-5.3848E-03

5.1591E+00

-2.1008E+01

4.5688E+01

-6.0990E+01

4.9941E+01

-2.2952E+01

4.5270E+00

S4

-6.0050E-02

1.7866E-01

2.2682E-01

1.9817E+00

-2.0459E+01

6.6175E+01

-1.0523E+02

8.4132E+01

-2.6957E+01

S5

-2.3173E-01

3.1544E-01

8.9952E-03

-6.7796E+00

3.3259E+01

-8.0845E+01

1.0983E+02

-7.9667E+01

2.4125E+01

S6

-1.7122E-01

-5.8849E-02

2.8063E-01

-3.8545E-01

-3.5225E-01

1.6168E+00

-1.9498E+00

1.0838E+00

-2.3353E-01

S7

-1.6562E-01

4.7520E-01

-1.5957E+00

2.8463E+00

-3.1034E+00

2.0326E+00

-7.5678E-01

1.4481E-01

-1.0801E-02

S8

3.2014E-02

-2.9839E-02

2.6805E-02

-8.7774E-02

1.4010E-01

-9.8059E-02

3.4559E-02

-6.0615E-03

4.2013E-04

S9

1.0683E-02

-2.2491E-01

3.2500E-01

-2.0946E-01

7.6511E-02

-1.6775E-02

2.1669E-03

-1.4929E-04

4.0762E-06

S10

5.6027E-02

-1.1038E-01

8.0007E-02

-3.3072E-02

7.6216E-03

-7.9060E-04

-2.3624E-05

1.2789E-05

-8.0739E-07

Watch 20

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)	f(mm)	TTL(mm)
								Numerical value	4.35	77.64	-24.02	2.74	-2.41	3.98	4.43

TABLE 21

Fig. 14A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 7, which represent deviation of convergence focuses 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 the distortion magnitude values in the case of different angles of view. Fig. 14D shows a relative illuminance curve of the optical imaging lens according to embodiment 7, which represents the relative illuminance corresponding to different image heights on the imaging surface. 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an imaging surface S13. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S13.

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

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

Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 8, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 23 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 8, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. Table 24 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging lens, and the total optical length TTL of the optical imaging lens in embodiment 8.

TABLE 22

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-6.7529E-03

1.7866E-01

-1.0010E+00

3.3465E+00

-6.9005E+00

8.7706E+00

-6.7332E+00

2.8410E+00

-5.0462E-01

S2

-2.1936E-01

-7.8065E-01

7.2748E+00

-2.4481E+01

4.7738E+01

-5.8402E+01

4.4159E+01

-1.8851E+01

3.4700E+00

S3

-3.0032E-01

-4.8260E-03

5.1176E+00

-2.0916E+01

4.5714E+01

-6.1437E+01

5.0692E+01

-2.3481E+01

4.6650E+00

S4

-5.5656E-02

1.6030E-01

2.0753E-01

2.2235E+00

-2.1260E+01

6.7787E+01

-1.0752E+02

8.6189E+01

-2.7791E+01

S5

-2.3037E-01

2.9156E-01

2.2117E-02

-6.7028E+00

3.2871E+01

-7.9909E+01

1.0847E+02

-7.8642E+01

2.3850E+01

S6

-1.8150E-01

9.5140E-03

6.1966E-03

2.3970E-01

-1.2806E+00

2.5416E+00

-2.5625E+00

1.3244E+00

-2.7398E-01

S7

-1.2061E-01

1.7365E-01

-5.3370E-01

7.1313E-01

-4.9093E-01

7.6316E-02

1.0995E-01

-6.3211E-02

1.0044E-02

S8

3.3803E-02

-6.8749E-02

1.4440E-01

-2.6722E-01

2.9894E-01

-1.8352E-01

6.2144E-02

-1.0969E-02

7.8980E-04

S9

7.7721E-03

-1.9805E-01

2.7929E-01

-1.7609E-01

6.3751E-02

-1.4120E-02

1.8915E-03

-1.4049E-04

4.4198E-06

S10

6.6052E-02

-1.2847E-01

1.0260E-01

-5.0265E-02

1.5727E-02

-3.1660E-03

3.9655E-04

-2.8088E-05

8.6347E-07

TABLE 23

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)	f(mm)	TTL(mm)
								Numerical value	4.28	340.69	-24.02	2.76	-2.43	3.98	4.45

TABLE 24

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 the distortion magnitude values in the case of different angles of view. Fig. 16D shows a relative illuminance curve of the optical imaging lens according to embodiment 8, which represents the relative illuminance corresponding to different image heights on the imaging surface. As can be seen from fig. 16A to 16D, the optical imaging lens according to embodiment 8 can achieve good imaging quality.

In conclusion, examples 1 to 8 each satisfy the relationship shown in table 25 below.

Conditional formula (I)	1	2	3	4	5	6	7	8
									f/EPD	1.88	1.79	1.80	1.83	1.86	1.88	1.88	1.88
f/f4	1.55	1.51	1.49	1.49	1.48	1.38	1.45	1.44
									f/f5	-1.77	-1.71	-1.70	-1.70	-1.70	-1.65	-1.65	-1.64
f/\|f2\|	0.05	0.07	0.08	0.09	0.09	0.04	0.05	0.01
									f/f12	0.96	0.96	0.96	0.95	0.94	1.01	0.98	0.97
\|R2/R6\|	0.02	0.02	0.02	0.04	0.06	0.03	0.07	0.01
									CT3/\|R5\|	0.03	0.03	0.03	0.03	0.03	0.02	0.02	0.03
f/CT4	6.75	7.24	7.28	7.32	7.34	8.23	7.67	7.54
									R6/R7	1.66	0.39	0.95	0.00	0.00	0.00	0.70	9.62
TTL/ImgH	1.38	1.50	1.45	1.38	1.41	1.40	1.43	1.48

TABLE 25

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

The foregoing description is only exemplary of the preferred embodiments 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. 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, and a fifth lens, the number of lenses having power in the optical imaging lens being five,

the first lens and the fourth lens each have a positive optical power;

the third lens and the fifth lens each have a negative optical power;

the second lens has positive focal power or negative focal power, and the effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens meet f/| f2| ≦ 0.1;

the combined focal power of the first lens and the second lens is positive focal power, the combined focal length f12 and the total effective focal length f of the optical imaging lens satisfy 0.8 < f/f12 < 1.2,

TTL/ImgH is less than 1.6, wherein, TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, and

at least one of the object side surface of the first lens and the image side surface of the fifth lens is an aspheric mirror surface.

2. The optical imaging lens of claim 1, wherein the first lens element has a convex object-side surface and a concave image-side surface.

3. The optical imaging lens system of claim 1 or 2, wherein the image side surface of the fifth lens is convex.

4. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy 1.3 ≦ f/f4 ≦ 1.6.

5. The optical imaging lens according to claim 1, characterized in that a total effective focal length f of the optical imaging lens and an effective focal length f5 of the fifth lens satisfy-1.8 ≦ f/f5 ≦ -1.5.

6. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the central thickness CT4 of the fourth lens on the optical axis satisfy 6 < f/CT4 < 9.

7. The optical imaging lens of claim 1, wherein the central thickness CT3 of the third lens on the optical axis and the radius of curvature R5 of the object-side surface of the third lens satisfy CT3/| R5| < 0.1.

8. The optical imaging lens of claim 2, wherein the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R6 of the image-side surface of the third lens satisfy | R2/R6| ≦ 0.1.

9. The optical imaging lens of claim 1 or 8, wherein the radius of curvature R6 of the image-side surface of the third lens and the radius of curvature R7 of the object-side surface of the fourth lens satisfy 0 ≦ R6/R7 < 10.

10. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy f/EPD ≦ 1.9.