CN211061763U

CN211061763U - Optical imaging lens

Info

Publication number: CN211061763U
Application number: CN201921833198.6U
Authority: CN
Inventors: 吕赛锋; 何镭; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-07-21
Anticipated expiration: 2029-10-29

Abstract

The application discloses an optical imaging lens, which sequentially comprises from an object side to an image side along an optical axis: a first lens having a focal power, an object-side surface of which is convex; a second lens having a positive optical power; a third lens having a refractive power, an object-side surface of which is convex; a fourth lens having an optical power; a fifth lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a sixth lens having positive optical power; and a seventh lens having a refractive power, an object side surface of which is concave. Wherein the total effective focal length f of the optical imaging lens, the entrance pupil diameter EPD of the optical imaging lens and the effective focal length f6 of the sixth lens satisfy the following conditional expression: f/EPD is less than 1.55; f6/f is more than 0.5 and less than 1.5.

Description

Optical imaging lens

Technical Field

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

Background

With the rapid development of electronic products, the portable electronic products such as mobile phones are updated more and more frequently, and the market competition is more and more intense. With the more serious homogenization of products, the spelling of each subdivision function becomes a great trend. Under the trend, manufacturers of portable electronic products such as mobile phones gradually focus on the quality of photographing the products, and continuously put forward new requirements for imaging systems.

How to realize large aperture, large image plane, high pixel, lightness and the like on the premise of ensuring the imaging quality of the lens so as to ensure that consumers can obtain satisfactory photos under different scenes is one of the key technical problems which need to be solved urgently by manufacturers of portable electronic products such as mobile phones and the like.

SUMMERY OF THE UTILITY MODEL

The present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens having a focal power, an object-side surface of which is convex; a second lens having a positive optical power; a third lens having a refractive power, an object-side surface of which is convex; a fourth lens having an optical power; a fifth lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a sixth lens having positive optical power; and a seventh lens having a refractive power, an object side surface of which is concave.

In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: f/EPD < 1.55.

In one embodiment, the effective focal length f6 of the sixth lens and the total effective focal length f of the optical imaging lens satisfy: f6/f is more than 0.5 and less than 1.5.

In one embodiment, the effective focal length f2 of the second lens, 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: f2/(R3+ R4) < 0.4 < 0.8.

In one embodiment, the effective focal length f5 of the fifth lens, the effective focal length f7 of the seventh lens, and the effective focal length f3 of the third lens may satisfy: 0.8 < (f5+ f7)/f3 < 1.4.

In one embodiment, the central thickness CT5 of the fifth lens on the optical axis, 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: 0.1 < CT5/(R9-R10) < 0.9.

In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R14 of the image-side surface of the seventh lens, and the total effective focal length f of the optical imaging lens may satisfy: 1.0 < (R11+ R14)/f < 1.4.

In one embodiment, the maximum field angle FOV of the optical imaging lens may satisfy: 70 < FOV < 80.

In one embodiment, a central thickness CT6 of the sixth lens on the optical axis, a central thickness CT7 of the seventh lens on the optical axis, and a separation distance T67 of the sixth lens and the seventh lens on the optical axis may satisfy: 1.0 < (CT6+ CT7)/T67 < 1.3.

In one embodiment, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis may satisfy: 0.3 < CT4/(CT1+ CT2+ CT3) < 0.7.

In one embodiment, the combined focal length f12 of the first and second lenses, the radius of curvature R1 of the object-side surface of the first lens, and the radius of curvature R2 of the image-side surface of the first lens may satisfy: f12/(R1+ R2) < 1.2 < 0.8.

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, a distance SAG61 on the optical axis from the intersection point of the object-side surface of the sixth lens and the optical axis to the effective radius vertex of the object-side surface of the sixth lens, and a distance SAG62 on the optical axis from the intersection point of the image-side surface of the sixth lens and the optical axis to the effective radius vertex of the image-side surface of the sixth lens may satisfy: 0.6 < SAG51/(SAG61+ SAG62) < 1.0.

In one embodiment, a distance SAG71 on the optical axis from the intersection point of the object-side surface of the seventh lens and the optical axis to the effective radius vertex of the object-side surface of the seventh lens, a distance SAG72 on the optical axis from the intersection point of the image-side surface of the seventh lens and the optical axis to the effective radius vertex of the image-side surface of the seventh lens, and an effective half-aperture DT71 of the object-side surface of the seventh lens may satisfy: 0.3 < | SAG71+ SAG72|/DT71 < 0.6.

The optical imaging lens adopts a plurality of lenses (for example, seven lenses), and has at least one beneficial effect of large aperture, large image plane, high pixel, lightness, high imaging quality and the like 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.

Drawings

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

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

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

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

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

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

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

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

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

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

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

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

fig. 12A to 12D show an 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 6.

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 seven lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, respectively. The seven 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 seventh lens may have a spacing distance therebetween.

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

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: f/EPD < 1.55, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. The f/EPD is less than 1.55, so that the optical imaging lens is favorable for better converging incident light, the imaging brightness is enhanced, the imaging quality in a long-range view state and a close-range view state is improved, and the characteristics of miniaturization and large image surface of the lens are ensured.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < f6/f < 1.5, wherein f6 is the effective focal length of the sixth lens, and f is the total effective focal length of the optical imaging lens. The optical imaging lens meets the condition that f6/f is more than 0.5 and less than 1.5, is favorable for better converging incident light, enhances the imaging brightness, improves the imaging quality in a long-range view state and a close-range view state, and simultaneously ensures the characteristics of miniaturization and large image surface of the lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.4 < f2/(R3+ R4) < 0.8, where f2 is the effective focal length of the second lens, R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, f2, R3, and R4 may further satisfy: f2/(R3+ R4) < 0.5 < 0.8. F2/(R3+ R4) is more than 0.4 and less than 0.8, so that the deflection of light rays is favorably slowed down, the overall sensitivity of the system is reduced, and the imaging effect is improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.8 < (f5+ f7)/f3 < 1.4, wherein f5 is the effective focal length of the fifth lens, f7 is the effective focal length of the seventh lens, and f3 is the effective focal length of the third lens. Satisfy 0.8 < (f5+ f7)/f3 < 1.4, be favorable to eliminating optical imaging lens's colour difference, reduce optical imaging lens's second grade spectrum, promote optical imaging lens's imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.1 < CT5/(R9-R10) < 0.9, where CT5 is the center thickness of the fifth lens on the optical axis, R9 is the radius of curvature of the object-side surface of the fifth lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. The requirement that CT5/(R9-R10) is more than 0.1 is met, the aberration of an optical convergence system is facilitated, the integral imaging quality is improved, and the processing feasibility of the fifth lens can be ensured.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < (R11+ R14)/f < 1.4, wherein R11 is the radius of curvature of the object-side surface of the sixth lens, R14 is the radius of curvature of the image-side surface of the seventh lens, and f is the total effective focal length of the optical imaging lens. Satisfies the condition that (R11+ R14)/f is less than 1.0, can effectively improve the close-range imaging quality in a large aperture state, and further obtains satisfactory shooting effect.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 70 < FOV < 80, where FOV is the maximum field angle of the optical imaging lens. More specifically, the FOV may further satisfy: 73 < FOV < 79. The wide angle optical fiber can meet the requirements of wide angle market when the FOV is more than 70 degrees and less than 80 degrees.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < (CT6+ CT7)/T67 < 1.3, wherein CT6 is the central thickness of the sixth lens on the optical axis, CT7 is the central thickness of the seventh lens on the optical axis, and T67 is the separation distance between the sixth lens and the seventh lens on the optical axis. The close-range imaging quality of the optical imaging lens can be improved if the condition is satisfied that (CT6+ CT7)/T67 is less than 1.3, and if the condition is exceeded, the close-range imaging quality and the long-range imaging quality cannot be completely considered.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.3 < CT4/(CT1+ CT2+ CT3) < 0.7, where CT4 is the central thickness of the fourth lens on the optical axis, 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, and CT3 is the central thickness of the third lens on the optical axis. The optical imaging lens meets the requirements that CT4/(CT1+ CT2+ CT3) is more than 0.3 and less than 0.7, the molding characteristic of the lens can be favorably ensured, the optical deflection degree is reduced, the sensitivity is reduced, the overall length of the optical imaging lens can be reduced, and the miniaturization requirement is met.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.8 < f12/(R1+ R2) < 1.2, wherein f12 is the combined focal length of the first lens and the second lens, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens. More specifically, f12, R1, and R2 may further satisfy: f12/(R1+ R2) < 1.2 < 0.9. F12/(R1+ R2) < 1.2 is more than 0.8, which is beneficial to weakening ghost image formed by internal reflection of the optical imaging lens, improving spherical aberration and reducing the field sensitivity of the central area.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.6 < SAG51/(SAG61+ SAG62) < 1.0, 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, SAG61 is a distance on the optical axis from the intersection point of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens, and SAG62 is a distance on the optical axis from the intersection point of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens. Satisfies the following conditions: 0.6 < SAG51/(SAG61+ SAG62) < 1.0, which is beneficial to the excessive uniformity between lens calibers, the bearing of the structure and the uniform stress and is also beneficial to ensuring the processing feasibility.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.3 < | SAG71+ SAG72|/DT71 < 0.6, wherein SAG71 is the distance on the optical axis from the intersection point of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh lens, SAG72 is the distance on the optical axis from the intersection point of the image side surface of the seventh lens and the optical axis to the effective radius vertex of the image side surface of the seventh lens, and DT71 is the effective half aperture of the object side surface of the seventh lens. Satisfies the following conditions: 0.3 < | SAG71+ SAG72|/DT71 < 0.6, which is beneficial to the lens manufacturing and forming and avoids the bad phenomenon in the lens forming process.

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 characteristics of large aperture, large image plane, high pixel, portability and the like, which can obtain good imaging quality at a far and a near scene and can obtain satisfactory imaging effect under different environments. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the incident light can be effectively converged, the optical total length of the optical imaging lens is reduced, the processability of the optical 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 seventh 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, the sixth lens, and the seventh lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, sixth, and seventh 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 seven lenses are exemplified in the embodiment, the optical imaging lens is not limited to include seven 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 seventh lens E7, a filter E8, and an image forming surface S17.

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 positive 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 convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

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 the present example, the total effective focal length f of the optical imaging lens is 5.44mm, the total length TT L 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 S17 of the optical imaging lens) is 7.30mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens is 4.42 mm.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the seventh lens E7 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S14 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

TABLE 2

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

Example 2

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

As shown in fig. 3, the optical imaging lens includes, in order from an object side to an image side: a 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 seventh lens E7, a filter E8, and an image forming surface S17.

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 positive 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 convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

In this example, the total effective focal length f of the optical imaging lens is 5.75mm, the total length TT L of the optical imaging lens is 7.30mm, and the half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens is 4.49 mm.

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

TABLE 3

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.4600E-03

2.3640E-03

-4.6700E-03

4.7340E-03

-2.8708E-03

1.0270E-03

-2.2000E-04

2.3800E-05

-1.0525E-06

S2

-4.9090E-02

-1.1070E-02

5.4230E-03

-3.1000E-04

2.4792E-04

-3.7000E-04

1.3700E-04

-2.2000E-05

1.3204E-06

S3

1.0188E-02

-2.8490E-02

5.9570E-03

-6.9800E-03

1.1493E-02

-7.0200E-03

2.1150E-03

-3.2000E-04

2.0198E-05

S4

-5.7600E-02

1.0049E-01

-1.2356E-01

1.1020E-01

-6.7536E-02

2.6976E-02

-6.7300E-03

9.6100E-04

-6.0456E-05

S5

-1.3328E-01

1.4175E-01

-1.0955E-01

7.7686E-02

-5.0086E-02

2.2679E-02

-6.3500E-03

1.0040E-03

-6.9777E-05

S6

-2.4490E-02

3.8815E-02

-4.6200E-03

-1.6560E-02

9.4732E-03

-2.3000E-04

-1.4300E-03

5.1100E-04

-5.8204E-05

S7

-2.6310E-02

8.9330E-03

-8.7600E-03

-1.1390E-02

2.9957E-02

-2.8220E-02

1.3677E-02

-3.4200E-03

3.4913E-04

S8

-1.4500E-02

-5.4300E-03

1.1271E-02

-2.0370E-02

1.9404E-02

-1.0630E-02

3.3920E-03

-5.9000E-04

4.2773E-05

S9

1.7301E-01

-2.0184E-01

1.4352E-01

-6.8510E-02

2.2095E-02

-4.4600E-03

5.0200E-04

-2.4000E-05

-8.5328E-09

S10

1.0491E-01

-1.2597E-01

8.0960E-02

-3.2590E-02

8.3786E-03

-1.2800E-03

1.0500E-04

-3.4000E-06

-9.4754E-09

S11

-6.5420E-02

2.0917E-02

-1.4360E-02

6.2890E-03

-1.9074E-03

4.0200E-04

-6.1000E-05

6.0300E-06

-2.7878E-07

S12

3.0843E-02

-1.5380E-02

-1.8900E-03

2.6940E-03

-8.9727E-04

1.5800E-04

-1.5000E-05

7.9200E-07

-1.6532E-08

S13

-5.5370E-02

1.0642E-02

-3.8600E-03

1.7610E-03

-4.1369E-04

5.3000E-05

-3.8000E-06

1.5000E-07

-2.4436E-09

S14

-6.7970E-02

1.6400E-02

-4.5100E-03

1.1390E-03

-1.9772E-04

2.1500E-05

-1.4000E-06

5.1000E-08

-7.8587E-10

TABLE 4

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

Example 3

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

As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side: a 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 seventh lens E7, a filter E8, and an image forming surface S17.

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 positive 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 convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

In this example, the total effective focal length f of the optical imaging lens is 5.74mm, the total length TT L of the optical imaging lens is 7.30mm, and the half of the diagonal length ImgH of the effective pixel area on the imaging plane S17 of the optical imaging lens is 4.49 mm.

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

TABLE 6

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

Example 4

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

As shown in fig. 7, the optical imaging lens includes, in order from an object side to an image side: a 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 seventh lens E7, a filter E8, and an image forming surface S17.

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

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.2400E-03

-3.3887E-04

-4.7811E-05

7.1700E-05

4.5111E-05

-1.3000E-04

6.9000E-05

-1.6000E-05

1.4000E-06

S2

-4.5490E-02

-1.8332E-02

1.5942E-02

-1.1720E-02

7.9907E-03

-3.5500E-03

9.1500E-04

-1.3000E-04

7.2200E-06

S3

1.6520E-02

-4.2105E-02

3.2202E-02

-4.0420E-02

3.5941E-02

-1.7560E-02

4.7830E-03

-6.9000E-04

4.1400E-05

S4

-5.7190E-02

9.5824E-02

-9.5649E-02

5.1444E-02

-9.2623E-03

-5.2700E-03

3.5630E-03

-8.2000E-04

6.8000E-05

S5

-1.3755E-01

1.3621E-01

-6.9539E-02

-4.4900E-03

3.4499E-02

-2.7120E-02

1.0735E-02

-2.1800E-03

1.7800E-04

S6

-2.4790E-02

3.2854E-02

2.0635E-02

-6.4240E-02

5.9061E-02

-3.0760E-02

9.6610E-03

-1.6800E-03

1.2200E-04

S7

-2.5420E-02

2.4303E-02

-5.8620E-02

8.2567E-02

-7.6385E-02

4.5382E-02

-1.6760E-02

3.4860E-03

-3.1000E-04

S8

8.7500E-04

-5.9882E-04

6.4028E-04

-9.0000E-03

1.0731E-02

-5.9800E-03

1.8180E-03

-2.9000E-04

1.9600E-05

S9

1.3694E-01

-1.2229E-01

6.4491E-02

-2.2330E-02

5.6490E-03

-9.8000E-04

9.9500E-05

-4.3000E-06

-9.5000E-09

S10

9.0401E-02

-8.7862E-02

4.3910E-02

-1.2880E-02

2.1819E-03

-1.3000E-04

-1.4000E-05

1.9100E-06

-2.8000E-08

S11

-3.4260E-02

-6.4421E-03

2.9726E-03

-3.2700E-03

1.9606E-03

-6.2000E-04

1.0200E-04

-8.3000E-06

2.5700E-07

S12

1.4102E-02

-1.3815E-03

-1.2687E-02

7.4150E-03

-2.1563E-03

3.6600E-04

-3.6000E-05

1.9300E-06

-4.3000E-08

S13

-6.9200E-02

2.6659E-02

-1.1155E-02

3.5670E-03

-6.8621E-04

7.9000E-05

-5.4000E-06

2.0300E-07

-3.2000E-09

S14

-7.9820E-02

2.6358E-02

-8.6978E-03

2.2030E-03

-3.6537E-04

3.7900E-05

-2.4000E-06

8.2000E-08

-1.2000E-09

TABLE 8

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

Example 5

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

As shown in fig. 9, the optical imaging lens includes, in order from an object side to an image side: a 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 seventh lens E7, a filter E8, and an image forming surface S17.

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

TABLE 9

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.7000E-03

-1.2932E-03

7.0737E-04

-3.7000E-04

2.6500E-04

-2.2000E-04

9.5600E-05

-2.1000E-05

1.7600E-06

S2

-4.2000E-02

-2.5977E-02

2.2409E-02

-1.4160E-02

8.0440E-03

-3.2400E-03

7.9400E-04

-1.1000E-04

5.9400E-06

S3

1.9708E-02

-4.7234E-02

3.1532E-02

-3.3540E-02

2.9386E-02

-1.4490E-02

3.9770E-03

-5.7000E-04

3.4200E-05

S4

-5.3360E-02

8.2831E-02

-7.8985E-02

4.2401E-02

-7.9300E-03

-4.7200E-03

3.3780E-03

-8.1000E-04

7.1200E-05

S5

-1.3560E-01

1.2498E-01

-4.9421E-02

-2.3900E-02

4.6852E-02

-3.3000E-02

1.2781E-02

-2.6100E-03

2.1800E-04

S6

-2.4500E-02

3.4234E-02

1.5823E-02

-5.4860E-02

4.7925E-02

-2.2750E-02

6.2730E-03

-9.0000E-04

4.5800E-05

S7

-2.4320E-02

2.6045E-02

-6.5699E-02

9.5184E-02

-8.9840E-02

5.4305E-02

-2.0390E-02

4.3130E-03

-3.9000E-04

S8

5.9050E-03

-3.7761E-03

3.7565E-03

-1.1730E-02

1.2702E-02

-6.9500E-03

2.0980E-03

-3.4000E-04

2.2300E-05

S9

1.3584E-01

-1.1931E-01

6.1071E-02

-1.9510E-02

4.2520E-03

-6.0000E-04

4.6300E-05

-1.4000E-06

-1.0000E-08

S10

9.4412E-02

-9.3659E-02

5.0978E-02

-1.8940E-02

5.4680E-03

-1.2400E-03

2.1200E-04

-2.3000E-05

1.1300E-06

S11

-2.9520E-02

-1.0331E-02

6.3930E-03

-5.4500E-03

2.8300E-03

-8.2000E-04

1.3200E-04

-1.1000E-05

3.4300E-07

S12

1.0390E-02

3.0420E-03

-1.4987E-02

8.1190E-03

-2.2800E-03

3.7900E-04

-3.7000E-05

1.9800E-06

-4.4000E-08

S13

-7.0830E-02

3.4375E-02

-1.6649E-02

5.3700E-03

-1.0300E-03

1.1900E-04

-8.3000E-06

3.1900E-07

-5.3000E-09

S14

-7.7710E-02

2.7900E-02

-1.0110E-02

2.5520E-03

-4.0000E-04

3.9200E-05

-2.3000E-06

7.4600E-08

-1.0000E-09

Watch 10

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

Example 6

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

As shown in fig. 11, the optical imaging lens includes, in order from an object side to an image side: a 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 seventh lens E7, a filter E8, and an image forming surface S17.

In this example, the total effective focal length f of the optical imaging lens is 5.61mm, the total length TT L of the optical imaging lens is 7.30mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens is 4.49 mm.

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

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.9290E-03

6.1740E-04

-1.2100E-03

1.2570E-03

-8.3000E-04

2.9200E-04

-5.2957E-05

3.4790E-06

5.9806E-08

S2

-4.6409E-02

-2.1313E-02

2.7550E-02

-2.6380E-02

1.7615E-02

-7.2100E-03

1.7248E-03

-2.2281E-04

1.2040E-05

S3

1.6668E-02

-5.4317E-02

7.4838E-02

-1.0272E-01

8.5484E-02

-4.0750E-02

1.1190E-02

-1.6583E-03

1.0322E-04

S4

-5.7356E-02

7.4922E-02

-1.6950E-02

-7.9020E-02

1.1090E-01

-7.0590E-02

2.4433E-02

-4.4464E-03

3.3386E-04

S5

-1.3115E-01

9.7779E-02

3.5739E-02

-1.6614E-01

1.8309E-01

-1.1005E-01

3.8256E-02

-7.1787E-03

5.6221E-04

S6

-2.0663E-02

2.3221E-02

2.4466E-02

-5.2070E-02

3.6962E-02

-1.3040E-02

1.9146E-03

9.9926E-05

-4.5626E-05

S7

-1.6895E-02

-1.4992E-02

5.1730E-02

-1.0049E-01

1.0643E-01

-6.6530E-02

2.4343E-02

-4.8286E-03

4.0207E-04

S8

2.1014E-02

-1.8562E-02

1.9583E-02

-2.6240E-02

2.1495E-02

-1.0290E-02

2.8797E-03

-4.3959E-04

2.8360E-05

S9

1.3618E-01

-1.1475E-01

5.3752E-02

-1.5460E-02

3.1640E-03

-4.6000E-04

3.9973E-05

-1.4575E-06

-6.8362E-09

S10

8.2254E-02

-7.7507E-02

3.6549E-02

-9.9100E-03

1.5240E-03

-7.8000E-05

-7.8777E-06

6.4696E-07

2.4653E-08

S11

-3.6383E-02

-3.3630E-03

-1.7500E-03

6.9400E-04

2.1100E-04

-1.7000E-04

3.5004E-05

-3.0221E-06

8.8209E-08

S12

1.6111E-02

-7.8283E-03

-7.8000E-03

5.5210E-03

-1.6900E-03

2.9100E-04

-2.8499E-05

1.4831E-06

-3.1757E-08

S13

-6.4584E-02

2.4668E-02

-9.4600E-03

2.7340E-03

-4.8000E-04

5.1300E-05

-3.2615E-06

1.1416E-07

-1.6981E-09

S14

-8.2048E-02

2.7981E-02

-8.8500E-03

2.0500E-03

-3.1000E-04

2.9400E-05

-1.6876E-06

5.3747E-08

-7.3070E-10

TABLE 12

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

In summary, examples 1 to 6 each satisfy the relationship shown in table 13.

Conditions/examples	1	2	3	4	5	6
							f/EPD	1.43	1.42	1.50	1.50	1.53	1.45
f6/f	0.79	0.82	0.54	1.24	1.44	1.38
							f2/(R3+R4)	0.58	0.70	0.69	0.68	0.68	0.70
(f5+f7)/f3	1.11	0.99	0.84	1.20	1.36	1.12
							CT5/(R9-R10)	0.62	0.47	0.19	0.69	0.73	0.80
(R11+R14)/f	1.32	1.12	1.08	1.16	1.18	1.18
							FOV(°)	77.0	74.8	74.8	74.9	74.8	75.0
(CT6+CT7)/T67	1.01	1.21	1.11	1.19	1.16	1.14
							CT4/(CT1+CT2+CT3)	0.66	0.45	0.38	0.57	0.59	0.52
f12/(R1+R2)	0.96	1.11	1.12	1.10	1.10	1.10
							SAG51/(SAG61+SAG62)	0.75	0.66	0.62	0.72	0.91	0.86
\|SAG71+SAG72\|/DT71	0.37	0.51	0.52	0.51	0.52	0.51

Watch 13

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

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

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

a first lens having a focal power, an object-side surface of which is convex;

a second lens having a positive optical power;

a third lens having a refractive power, an object-side surface of which is convex;

a fourth lens having an optical power;

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

a sixth lens having positive optical power;

a seventh lens having a refractive power, an object side surface of which is concave; wherein the content of the first and second substances,

the total effective focal length f of the optical imaging lens, the entrance pupil diameter EPD of the optical imaging lens and the effective focal length f6 of the sixth lens satisfy the following conditional expressions:

f/EPD＜1.55；

0.5＜f6/f＜1.5。

2. the optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens, 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: f2/(R3+ R4) < 0.4 < 0.8.

3. The optical imaging lens of claim 1, wherein the effective focal length f5 of the fifth lens, the effective focal length f7 of the seventh lens, and the effective focal length f3 of the third lens satisfy: 0.8 < (f5+ f7)/f3 < 1.4.

4. The optical imaging lens according to claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis, a radius of curvature R9 of an object-side surface of the fifth lens, and a radius of curvature R10 of an image-side surface of the fifth lens satisfy: 0.1 < CT5/(R9-R10) < 0.9.

5. The optical imaging lens of claim 1, wherein the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R14 of the image-side surface of the seventh lens, and the total effective focal length f of the optical imaging lens satisfy: 1.0 < (R11+ R14)/f < 1.4.

6. The optical imaging lens of claim 1, wherein the maximum field angle FOV of the optical imaging lens satisfies: 70 < FOV < 80.

7. The optical imaging lens according to claim 1, wherein a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a separation distance T67 of the sixth lens and the seventh lens on the optical axis satisfy: 1.0 < (CT6+ CT7)/T67 < 1.3.

8. The optical imaging lens according to claim 1, wherein a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis satisfy: 0.3 < CT4/(CT1+ CT2+ CT3) < 0.7.

9. The optical imaging lens of claim 1, wherein a combined focal length f12 of the first and second lenses, a radius of curvature R1 of an object side surface of the first lens, and a radius of curvature R2 of an image side surface of the first lens satisfy: f12/(R1+ R2) < 1.2 < 0.8.

10. 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 an object-side surface of the fifth lens, a distance SAG61 on the optical axis from an intersection point of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of an object-side surface of the sixth lens, and a distance SAG62 on the optical axis from an intersection point of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of an image-side surface of the sixth lens satisfy: 0.6 < SAG51/(SAG61+ SAG62) < 1.0.

11. The optical imaging lens according to claim 1, wherein a distance SAG71 on the optical axis from an intersection point of the object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens, a distance SAG72 on the optical axis from an intersection point of the image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens, and an effective half aperture DT71 of the object-side surface of the seventh lens satisfy: 0.3 < | SAG71+ SAG72|/DT71 < 0.6.

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

a first lens having a focal power, an object-side surface of which is convex;

a second lens having a positive optical power;

a fourth lens having an optical power;

a sixth lens having positive optical power;

an effective focal length f2 of the second lens, a radius of curvature R3 of an object-side surface of the second lens, and a radius of curvature R4 of an image-side surface of the second lens satisfy: f2/(R3+ R4) < 0.4 < 0.8.

13. The optical imaging lens of claim 12, wherein the total effective focal length f of the optical imaging lens and the effective focal length f6 of the sixth lens satisfy: f6/f is more than 0.5 and less than 1.5.

14. The optical imaging lens of claim 12, wherein the effective focal length f5 of the fifth lens, the effective focal length f7 of the seventh lens, and the effective focal length f3 of the third lens satisfy: 0.8 < (f5+ f7)/f3 < 1.4.

15. The optical imaging lens of claim 12, wherein a center thickness CT5 of the fifth lens on the optical axis, a radius of curvature R9 of an object-side surface of the fifth lens, and a radius of curvature R10 of an image-side surface of the fifth lens satisfy: 0.1 < CT5/(R9-R10) < 0.9.

16. The optical imaging lens of claim 12, wherein the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R14 of the image-side surface of the seventh lens, and the total effective focal length f of the optical imaging lens satisfy: 1.0 < (R11+ R14)/f < 1.4.

17. The optical imaging lens of claim 12, wherein the maximum field angle FOV of the optical imaging lens satisfies: 70 < FOV < 80.

18. The optical imaging lens according to claim 12, wherein a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a separation distance T67 of the sixth lens and the seventh lens on the optical axis satisfy: 1.0 < (CT6+ CT7)/T67 < 1.3.

19. The optical imaging lens of claim 12, wherein the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis satisfy: 0.3 < CT4/(CT1+ CT2+ CT3) < 0.7.

20. The optical imaging lens of claim 12, wherein a combined focal length f12 of the first and second lenses, a radius of curvature R1 of an object side surface of the first lens, and a radius of curvature R2 of an image side surface of the first lens satisfy: f12/(R1+ R2) < 1.2 < 0.8.

21. The optical imaging lens of claim 12, 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 an object-side surface of the fifth lens, a distance SAG61 on the optical axis from an intersection point of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of an object-side surface of the sixth lens, and a distance SAG62 on the optical axis from an intersection point of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of an image-side surface of the sixth lens satisfy: 0.6 < SAG51/(SAG61+ SAG62) < 1.0.

22. The optical imaging lens of claim 12, wherein a distance SAG71 on the optical axis from an intersection point of the object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens, a distance SAG72 on the optical axis from an intersection point of the image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens, and an effective half aperture DT71 of the object-side surface of the seventh lens satisfy: 0.3 < | SAG71+ SAG72|/DT71 < 0.6.