CN214895989U

CN214895989U - Optical imaging lens

Info

Publication number: CN214895989U
Application number: CN202121573438.0U
Authority: CN
Inventors: 吴旭炯; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-11-26
Anticipated expiration: 2031-07-12

Abstract

The application discloses an optical imaging lens, which sequentially comprises from an object side to an image side along an optical axis: a diaphragm; a first lens having an optical power; a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; a third lens having optical power; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is concave; the fifth lens with positive focal power has a convex object-side surface and a convex image-side surface; and a sixth lens element with negative refractive power, wherein the object-side surface is convex and the image-side surface is concave. 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, the total effective focal length F of the optical imaging lens and the F number Fno of the optical imaging lens meet the following requirements: TTL/f is multiplied by Fno < 2.35; 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 satisfy: TTL/ImgH is less than 1.3.

Description

Optical imaging lens

Technical Field

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

Background

Along with the rapid development of the semiconductor industry, the updating speed of intelligent equipment is faster and faster, the performance of the electronic photosensitive element is rapidly improved along with the progress of the semiconductor technology, and meanwhile, the requirement on the optical imaging lens carried on the electronic photosensitive element on the market is higher and higher. In order to obtain better imaging effect and more precise processing technology, the optical imaging lens is developing towards large image plane and ultra-thinning. Particularly, how to design an optical imaging lens which has a higher resolution and can be better compatible and matched with a smart phone is realized, so that the optical imaging lens which can reduce the bulge of the optical imaging lens on the back of the smart phone to make the appearance of the smart phone more beautiful and can ensure a higher imaging effect becomes one of the main directions for improving the competitiveness of many lens manufacturers at present.

SUMMERY OF THE UTILITY MODEL

An aspect of the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a diaphragm; a first lens having an optical power; a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; a third lens having optical power; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is concave; the fifth lens with positive focal power has a convex object-side surface and a convex image-side surface; and a sixth lens element with negative refractive power, wherein the object-side surface is convex and the image-side surface is concave. 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, the total effective focal length F of the optical imaging lens and the F number Fno of the optical imaging lens can satisfy the following conditions: TTL/f is multiplied by Fno < 2.35; 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 can satisfy: TTL/ImgH is less than 1.3.

In one embodiment, at least one mirror surface of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror surface.

In one embodiment, the total effective focal length f of the optical imaging lens, the combined focal length f123 of the first, second, and third lenses, and half of the maximum field angle Semi-FOV of the optical imaging lens may satisfy: 1.0 < f123/f × tan (Semi-FOV) < 1.5.

In one embodiment, a central thickness CT1 of the first lens on the optical axis, a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, a distance T34 between the third lens and the fourth lens on the optical axis, and a distance BFL between the image side surface of the sixth lens and the imaging surface of the optical imaging lens on the optical axis may satisfy: 0.5 < (CT1+ CT2+ CT3-T34)/BFL < 1.0.

In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, and the total effective focal length f of the optical imaging lens may satisfy: 2.0 < (R7+ R8+ R9+ R10)/f < 3.5.

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 may satisfy: 0.4 < (R9+ R10)/(R9-R10) < 0.6.

In one embodiment, the effective focal length f1 of the first lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens may satisfy: 1.5 < (f5-f6)/f1 < 1.6.

In one embodiment, a distance SAG51 on the optical axis from the intersection point of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens to a distance SAG52 on the optical axis from the intersection point of the image-side surface of the fifth lens and the optical axis to the effective radius vertex of the image-side surface of the fifth lens may satisfy: 1.6 < | SAG52/SAG51| < 2.5.

In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 2.0 < R3/R4 < 2.5. In one embodiment, a sum Σ AT of a distance TTL on the optical axis from the object side surface of the first lens element to the imaging surface of the optical imaging lens and a separation distance on the optical axis of any adjacent two lens elements of the first lens element to the sixth lens element may satisfy: TTL/Sigma AT is more than 3.0 and less than 3.5.

Another aspect of the present disclosure provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a diaphragm; a first lens having an optical power; a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; a third lens having optical power; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is concave; the fifth lens with positive focal power has a convex object-side surface and a convex image-side surface; and a sixth lens element with negative refractive power, wherein the object-side surface is convex and the image-side surface is concave. 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, the total effective focal length F of the optical imaging lens and the F number Fno of the optical imaging lens can satisfy the following conditions: TTL/f is multiplied by Fno < 2.35; and the sum Σ AT of the distance TTL on the optical axis from the object-side surface of the first lens element to the imaging surface of the optical imaging lens and the distance between any two adjacent lens elements in the first lens element to the sixth lens element on the optical axis can satisfy: TTL/Sigma AT is more than 3.0 and less than 3.5.

In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 2.0 < R3/R4 < 2.5.

In one embodiment, a distance TTL from an object side surface of the first lens element to an imaging surface of the optical imaging lens on an optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens may satisfy: TTL/ImgH is less than 1.3.

This application provides an applicable light electronic product through reasonable distribution focal power and optimization optical parameter, has at least one beneficial effect's in miniaturized, big image plane, large aperture, ultra-thin and good image quality optical imaging lens.

Drawings

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

fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;

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

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

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

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

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

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

fig. 8A to 8D show an axial 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.

Detailed Description

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

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

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

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

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

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

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

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

An optical imaging lens according to an exemplary embodiment of the present application may include six lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, respectively. The six lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the sixth lens can have a spacing distance therebetween.

In an exemplary embodiment, the first lens may have a positive power or a negative power; the second lens has positive focal power or negative focal power, the object side surface can be a convex surface, and the image side surface can be a concave surface; the third lens may have a positive optical power or a negative optical power; the fourth lens can have 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 element has positive focal power, and has a convex object-side surface and a convex image-side surface; and the sixth lens element can have a negative power, and the object-side surface can be convex and the image-side surface can be concave.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: TTL/F multiplied by Fno < 2.35, wherein, TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis, F is the total effective focal length of the optical imaging lens, and Fno is the F number of the optical imaging lens. More specifically, TTL, f, and Fno may further satisfy: TTL/f is multiplied by Fno < 2.30. The requirements of TTL/f multiplied by Fno < 2.35 are met, and the optical imaging lens has the characteristics of large caliber, ultra-thin performance and the like.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < f123/f × tan (Semi-FOV) < 1.5, where f is the total effective focal length of the optical imaging lens, f123 is the combined focal length of the first lens, the second lens, and the third lens, and the Semi-FOV is half of the maximum field angle of the optical imaging lens. The optical imaging lens meets the requirement that f123/f multiplied tan (Semi-FOV) is more than 1.0 and less than 1.5, the characteristic of small distortion is favorably realized, the aberration generated by a rear lens can be balanced by reasonably setting the f123, and the optical imaging lens can obtain good imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < (CT1+ CT2+ CT3-T34)/BFL < 1.0, wherein CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, T34 is the distance between the third lens and the fourth lens on the optical axis, and BFL is the distance between the image side surface of the sixth lens and the imaging surface of the optical imaging lens on the optical axis. More specifically, CT1, CT2, CT3, T34 and BFL may further satisfy: 0.6 < (CT1+ CT2+ CT3-T34)/BFL < 1.0. Satisfy 0.5 < (CT1+ CT2+ CT3-T34)/BFL < 1.0, can guarantee the processing performance of first lens to sixth lens, can guarantee the ultra-thin characteristic of optical imaging lens again.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < (R7+ R8+ R9+ R10)/f < 3.5, wherein R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, R9 is the radius of curvature of the object-side surface of the fifth lens, R10 is the radius of curvature of the image-side surface of the fifth lens, and f is the total effective focal length of the optical imaging lens. More specifically, R7, R8, R9, R10 and f may further satisfy: 2.7 < (R7+ R8+ R9+ R10)/f < 3.4. Satisfy 2.0 < (R7+ R8+ R9+ R10)/f < 3.5, be favorable to rationally controlling the incident angle of the chief ray of each visual field of optical imaging lens at the image plane, so that the chief ray incident angle of optical imaging lens satisfies the design requirement.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.4 < (R9+ R10)/(R9-R10) < 0.6, wherein 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. Satisfy 0.4 < (R9+ R10)/(R9-R10) < 0.6, be favorable to reducing the risk of fifth lens ghost image, promote the performance of lens macro.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5 < (f5-f6)/f1 < 1.6, wherein f1 is the effective focal length of the first lens, f5 is the effective focal length of the fifth lens, and f6 is the effective focal length of the sixth lens. More specifically, f1, f5, and f6 may further satisfy: 1.5 < (f5-f6)/f1 < 1.55. Satisfying 1.5 < (f5-f6)/f1 < 1.6, the spherical aberration generated by the fifth lens and the sixth lens can be balanced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.6 < | SAG52/SAG51| < 2.5, wherein SAG51 is a distance on the optical axis from the intersection point of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens, and SAG52 is a distance on the optical axis from the intersection point of the image-side surface of the fifth lens and the optical axis to the effective radius vertex of the image-side surface of the fifth lens. More specifically, SAG52 and SAG51 further may satisfy: 1.8 < | SAG52/SAG51| < 2.5. Satisfying 1.6 < | SAG52/SAG51| < 2.5 is advantageous for improving the workability of the fifth lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < R3/R4 < 2.5, wherein R3 is the radius of curvature of the object-side surface of the second lens and R4 is the radius of curvature of the image-side surface of the second lens. The requirement that R3/R4 is more than 2.0 and less than 2.5 is met, the shape of the second lens can be effectively constrained, the aberration contribution of the object side surface and the image side surface of the second lens can be effectively controlled, and the imaging quality of the lens can be effectively improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: TTL/ImgH < 1.3, wherein, TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. The TTL/ImgH is less than 1.3, and the ultrathin characteristic of the lens is favorably realized.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 3.0 < TTL/Σ AT < 3.5, where TTL is the distance on the optical axis from the object side surface of the first lens element to the imaging surface of the optical imaging lens system, and Σ AT is the sum of the distances between any two adjacent first to sixth lens elements on the optical axis. More specifically, TTL and Σ AT may further satisfy: TTL/Sigma AT is more than 3.0 and less than 3.4. The lens distortion can be reasonably controlled and the lens has good distortion performance when the TTL/Sigma AT is more than 3.0 and less than 3.5.

In an exemplary embodiment, an optical imaging lens according to the present application further includes a stop disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface. The application provides an optical imaging lens with the characteristics of miniaturization, large image surface, large aperture, ultra-thin, high imaging quality and the like. The optical imaging lens has a large image plane, so that the optical imaging lens has a high resolution. The optical imaging lens has the ultrathin characteristic, can be better compatible with the smart phone, can reduce the bulge of the optical imaging lens on the back of the smart phone, and is favorable for making the appearance of the smart phone more attractive. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above six lenses. By reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the optical imaging lens is more beneficial to production and processing.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the sixth lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, and sixth lenses has an object-side surface and an image-side surface that 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 six lenses are exemplified in the embodiment, the optical imaging lens is not limited to including six lenses. The optical imaging lens may also include other numbers of lenses, if desired.

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

Example 1

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

As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive 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 concave 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 positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

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

TABLE 1

In this example, the total effective focal length F of the optical imaging lens is 5.58mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 6.62mm, the half ImgH of the diagonal length of the effective pixel region on the imaging surface S15 of the optical imaging lens is 5.36mm, the half semifov of the maximum angle of view of the optical imaging lens is 43.49 °, and the F-number Fno of the optical imaging lens is 1.92.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the sixth lens E6 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. The high-order term coefficients A that can be used for the aspherical mirror surfaces S1 through S12 in example 1 are shown in tables 2-1 and 2-2 below₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈、A₂₀、A₂₂、A₂₄、A₂₆、A₂₈And A₃₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-3.8461E-05

9.1161E-03

-1.9656E-02

1.5387E-03

1.2419E-01

-3.8368E-01

6.4017E-01

S2

-2.9285E-02

2.7013E-02

-5.3178E-02

2.4561E-01

-9.2180E-01

2.3738E+00

-4.2562E+00

S3

-3.2319E-02

-8.4093E-03

3.4298E-01

-1.7606E+00

5.6726E+00

-1.2514E+01

1.9509E+01

S4

-9.1772E-03

4.9030E-02

-2.1803E-01

8.1378E-01

-1.0852E+00

-3.3951E+00

1.9404E+01

S5

-2.4425E-02

-1.8548E-01

1.4181E+00

-6.9553E+00

2.2957E+01

-5.3420E+01

8.9686E+01

S6

-5.9585E-02

6.6785E-02

-3.3278E-01

1.4389E+00

-4.3550E+00

9.0065E+00

-1.3046E+01

S7

-1.1159E-01

6.6135E-02

-5.9686E-02

1.0716E-01

-1.9298E-01

2.2720E-01

-1.6936E-01

S8

-1.2145E-01

5.8961E-02

-3.5775E-02

4.3834E-02

-6.1597E-02

5.8558E-02

-3.6601E-02

S9

-2.9443E-02

-1.2445E-02

2.0059E-02

-8.7214E-03

2.1659E-03

-1.2046E-03

8.9729E-04

S10

-8.9942E-03

-1.3586E-02

3.0747E-02

-3.1531E-02

2.6224E-02

-1.5313E-02

5.9881E-03

S11

-1.9241E-01

6.5961E-02

8.2238E-03

-1.6126E-02

7.0999E-03

-1.8171E-03

3.1078E-04

S12

-2.1083E-01

1.1506E-01

-4.9570E-02

1.6723E-02

-4.3522E-03

8.5881E-04

-1.2715E-04

TABLE 2-1

Tables 2 to 2

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

Example 2

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

As shown in fig. 3, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive 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 positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length F of the optical imaging lens is 5.57mm, the total length TTL of the optical imaging lens is 6.62mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.36mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 43.49 °, and the F-number Fno of the optical imaging lens is 1.92.

Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 4-1, 4-2 show the 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 the formula (1) given in example 1 above.

TABLE 3

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-3.0498E-04

1.3047E-02

-5.8473E-02

1.9547E-01

-4.7166E-01

8.3376E-01

-1.0847E+00

S2

-3.0865E-02

3.1701E-02

-4.9140E-02

1.1542E-01

-2.7056E-01

5.9448E-01

-1.1293E+00

S3

-3.2610E-02

-1.2633E-02

3.9756E-01

-2.0578E+00

6.6932E+00

-1.4893E+01

2.3415E+01

S4

-9.8491E-03

6.1198E-02

-3.1134E-01

1.3148E+00

-2.9794E+00

1.7133E+00

9.4359E+00

S5

-3.3820E-02

-6.3218E-02

5.4445E-01

-2.9902E+00

1.0822E+01

-2.7403E+01

4.9701E+01

S6

-5.3962E-02

3.0907E-02

-1.0772E-01

5.3695E-01

-1.9898E+00

4.7665E+00

-7.6942E+00

S7

-1.1066E-01

7.0604E-02

-9.4203E-02

2.2525E-01

-4.3427E-01

5.5378E-01

-4.7620E-01

S8

-1.2110E-01

4.8463E-02

-3.1424E-03

-1.2727E-02

2.9738E-03

7.1046E-03

-7.1619E-03

S9

-2.8495E-02

-1.9105E-02

3.2640E-02

-2.2245E-02

1.1813E-02

-6.0976E-03

2.7153E-03

S10

-1.1145E-02

-1.0278E-02

2.5529E-02

-2.5129E-02

2.1365E-02

-1.2925E-02

5.1834E-03

S11

-2.0263E-01

7.1240E-02

9.2073E-03

-1.8415E-02

8.3183E-03

-2.1851E-03

3.8366E-04

S12

-2.1890E-01

1.2161E-01

-5.2783E-02

1.7836E-02

-4.6474E-03

9.2013E-04

-1.3703E-04

TABLE 4-1

TABLE 4-2

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

Example 3

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

As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive 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 negative power, and has a concave 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 positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length F of the optical imaging lens is 5.56mm, the total length TTL of the optical imaging lens is 6.62mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.36mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 43.42 °, and the F-number Fno of the optical imaging lens is 1.92.

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 6-1, 6-2 show the 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 the formula (1) given in example 1 above.

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-3.5926E-03

5.0442E-02

-3.1760E-01

1.2756E+00

-3.3964E+00

6.2530E+00

-8.1791E+00

S2

-2.9404E-02

9.6060E-03

1.0309E-01

-5.9485E-01

1.8949E+00

-3.8494E+00

5.2033E+00

S3

-3.8522E-02

5.5623E-02

-9.2799E-02

1.2159E-01

2.6690E-01

-1.6792E+00

3.9412E+00

S4

-9.5390E-03

2.7798E-02

-2.1615E-02

7.1651E-02

-1.8616E-01

-3.0548E-02

1.5848E+00

S5

6.8831E-03

-7.1344E-01

5.3061E+00

-2.4944E+01

7.8984E+01

-1.7550E+02

2.8009E+02

S6

-7.5735E-02

1.2833E-01

-6.4442E-01

2.5040E+00

-6.7639E+00

1.2665E+01

-1.6768E+01

S7

-1.4642E-01

3.2164E-01

-1.0098E+00

2.3761E+00

-3.9076E+00

4.5519E+00

-3.8271E+00

S8

-1.2132E-01

1.0235E-01

-1.6885E-01

2.7926E-01

-3.3956E-01

2.8906E-01

-1.7405E-01

S9

-2.3778E-02

-2.4685E-02

4.0152E-02

-3.6698E-02

2.8570E-02

-1.7450E-02

7.5934E-03

S10

-7.8485E-03

-1.6408E-02

3.5563E-02

-4.0144E-02

3.5566E-02

-2.1297E-02

8.4195E-03

S11

-2.1408E-01

8.3952E-02

-3.0058E-04

-1.3196E-02

6.2670E-03

-1.6111E-03

2.6865E-04

S12

-2.2964E-01

1.3040E-01

-5.6855E-02

1.8986E-02

-4.8559E-03

9.4550E-04

-1.3942E-04

TABLE 6-1

TABLE 6-2

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

Example 4

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

As shown in fig. 7, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

In this example, the total effective focal length F of the optical imaging lens is 5.57mm, the total length TTL of the optical imaging lens is 6.62mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens is 5.36mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 43.49 °, and the F-number Fno of the optical imaging lens is 1.91.

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 8-1, 8-2 show the 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 the formula (1) given in example 1 above.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-8.9407E-04

1.7173E-02

-7.9250E-02

2.6823E-01

-6.5241E-01

1.1573E+00

-1.5064E+00

S2

-3.0616E-02

2.6813E-02

-6.2357E-03

-1.0948E-01

4.7245E-01

-1.0477E+00

1.3967E+00

S3

-3.2643E-02

-1.4795E-03

2.8633E-01

-1.4491E+00

4.5554E+00

-9.7905E+00

1.4867E+01

S4

-8.6577E-03

5.3150E-02

-2.2734E-01

7.4446E-01

-5.0407E-01

-5.5368E+00

2.4294E+01

S5

-3.4684E-02

-3.8764E-02

3.1882E-01

-1.8145E+00

6.8442E+00

-1.8197E+01

3.4718E+01

S6

-5.0264E-02

1.6091E-02

-5.5351E-02

3.9260E-01

-1.7177E+00

4.4463E+00

-7.5159E+00

S7

-1.0598E-01

3.7784E-02

3.7122E-02

-1.2613E-01

2.2003E-01

-3.1456E-01

3.5735E-01

S8

-1.1976E-01

3.8271E-02

2.3627E-02

-5.5254E-02

4.9772E-02

-3.0302E-02

1.4893E-02

S9

-2.7101E-02

-2.3652E-02

3.7949E-02

-2.4905E-02

1.1819E-02

-5.3229E-03

2.2145E-03

S10

-1.1177E-02

-9.0716E-03

2.0674E-02

-1.7889E-02

1.5550E-02

-1.0001E-02

4.1926E-03

S11

-2.0522E-01

7.1643E-02

1.0813E-02

-1.9943E-02

9.0310E-03

-2.3930E-03

4.2470E-04

S12

-2.2109E-01

1.2274E-01

-5.2808E-02

1.7601E-02

-4.5227E-03

8.8534E-04

-1.3078E-04

TABLE 8-1

TABLE 8-2

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.

In summary, examples 1 to 4 satisfy the relationships shown in table 9, respectively.

Conditions/examples	1	2	3	4
					TTL/f×fno	2.28	2.28	2.28	2.27
TTL/ImgH	1.24	1.24	1.24	1.24
					f123/f×tan(Semi-FOV)	1.20	1.17	1.36	1.15
(CT1+CT2+CT3-T34)/BFL	0.86	0.84	0.78	0.84
					(R7+R8+R9+R10)/f	3.10	3.09	3.12	3.16
(R9+R10)/(R9-R10)	0.44	0.43	0.52	0.42
					(f5-f6)/f1	1.54	1.52	1.51	1.51
TTL/ΣAT	3.26	3.30	3.15	3.31
					\|SAG52/SAG51\|	2.40	2.44	1.93	2.45
R3/R4	2.10	2.31	2.31	2.29

TABLE 9

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 those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above 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 diaphragm;

a first lens having an optical power;

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

a third lens having optical power;

a fourth lens having a focal power, wherein the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is concave;

the fifth lens with positive focal power has a convex object-side surface and a convex image-side surface; and

a sixth lens element with negative refractive power having a convex object-side surface and a concave image-side surface;

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, the total effective focal length F of the optical imaging lens and the F number Fno of the optical imaging lens meet the following requirements: TTL/f is multiplied by Fno < 2.35; 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 satisfy that: TTL/ImgH is less than 1.3.

2. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens, the combined focal length f123 of the first lens, the second lens and the third lens, and half of the Semi-FOV of the maximum field angle of the optical imaging lens satisfy: 1.0 < f123/f × tan (Semi-FOV) < 1.5.

3. The optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a separation distance T34 of the third lens and the fourth lens on the optical axis, and a distance BFL from an image side surface of the sixth lens to an imaging surface of the optical imaging lens on the optical axis satisfy: 0.5 < (CT1+ CT2+ CT3-T34)/BFL < 1.0.

4. The optical imaging lens of claim 1, wherein the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, and the total effective focal length f of the optical imaging lens satisfy: 2.0 < (R7+ R8+ R9+ R10)/f < 3.5.

5. The optical imaging lens of claim 1, wherein 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: 0.4 < (R9+ R10)/(R9-R10) < 0.6.

6. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: 1.5 < (f5-f6)/f1 < 1.6.

7. The optical imaging lens of claim 1, wherein a distance SAG51 on the optical axis from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens to a distance SAG52 on the optical axis from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens satisfies: 1.6 < | SAG52/SAG51| < 2.5.

8. The optical imaging lens of claim 1, wherein the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 2.0 < R3/R4 < 2.5.

9. The optical imaging lens of claim 1, wherein a sum Σ AT of a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens and a separation distance on the optical axis of any two adjacent lenses of the first lens to the sixth lens satisfies: TTL/Sigma AT is more than 3.0 and less than 3.5.

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

a diaphragm;

a first lens having an optical power;

a third lens having optical power;

a sum Σ AT of a distance TTL on the optical axis from an object-side surface of the first lens element to an imaging surface of the optical imaging lens and a distance between any two adjacent lens elements of the first lens element to the sixth lens element on the optical axis satisfies: TTL/Sigma AT is more than 3.0 and less than 3.5.

11. The optical imaging lens of claim 10, wherein the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 2.0 < R3/R4 < 2.5.

12. The optical imaging lens of claim 10, wherein the total effective focal length f of the optical imaging lens, the combined focal length f123 of the first lens, the second lens and the third lens, and half of the Semi-FOV of the maximum field angle of the optical imaging lens satisfy: 1.0 < f123/f × tan (Semi-FOV) < 1.5.

13. The optical imaging lens of claim 10, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a separation distance T34 of the third lens and the fourth lens on the optical axis, and a distance BFL from an image side surface of the sixth lens to an imaging surface of the optical imaging lens on the optical axis satisfy: 0.5 < (CT1+ CT2+ CT3-T34)/BFL < 1.0.

14. The optical imaging lens of claim 10, wherein the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, and the total effective focal length f of the optical imaging lens satisfy: 2.0 < (R7+ R8+ R9+ R10)/f < 3.5.

15. The optical imaging lens of claim 10, wherein 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: 0.4 < (R9+ R10)/(R9-R10) < 0.6.

16. The optical imaging lens of claim 10, wherein the effective focal length f1 of the first lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: 1.5 < (f5-f6)/f1 < 1.6.

17. The optical imaging lens of claim 10, wherein a distance SAG51 on the optical axis from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens to a distance SAG52 on the optical axis from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens satisfies: 1.6 < | SAG52/SAG51| < 2.5.

18. The optical imaging lens of claim 17, 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 is less than 1.3.