CN211086743U

CN211086743U - Optical imaging lens

Info

Publication number: CN211086743U
Application number: CN201921298436.8U
Authority: CN
Inventors: 张佳莹; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-07-24
Anticipated expiration: 2029-08-12

Abstract

The application discloses an optical imaging lens which sequentially comprises a first lens with positive focal power, a second lens with focal power, a third lens with focal power, a fourth lens with focal power, a fifth lens with positive focal power, and a sixth lens with negative focal power, wherein the object side surface of the fourth lens is convex, the image side surface of the fourth lens is concave, the object side surface of the fifth lens is convex, the object side surface of the sixth lens is convex, the distance TT L 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 line of an effective pixel area on the imaging surface satisfy TT L/ImgH < 1.6, and the total effective focal length f of the optical imaging lens and the maximum half-field angle Semi-FOV of the optical imaging lens satisfy that 4.5mm < f × tan (Semi-FOV) < 7mm from the object side to the image side.

Description

Optical imaging lens

Technical Field

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

Background

With the rapid development of electronic products, the imaging lens is more and more widely applied. On the other hand, with the trend of the portable electronic products towards being lighter and thinner, the imaging lens not only needs to have good image quality, but also needs to have light and thin characteristics, so as to effectively reduce the thickness of the portable electronic products. On the other hand, people have made higher and higher demands on the image quality of the imaging lens of the portable electronic product.

With the advancement of semiconductor manufacturing technology, the pixel size of the photosensitive element is continuously reduced, so that the imaging lens mounted on the portable electronic product such as a mobile phone or a digital camera tends to be developed in the fields of miniaturization, large field angle, high pixel, and the like. In order to satisfy high pixel and large field angle, a common imaging lens needs to adopt a configuration with a large aperture, so that the size of the lens is large, and the lens is difficult to be well matched with a high-pixel photosensitive chip. In addition, in order to further increase the field angle, distortion is increased and the outgoing angle of the principal ray is too large, so that the resolution of the lens is not sufficient.

In order to meet the development demand of the market, the total length of the imaging lens needs to be shortened as much as possible. The total length of the lens can be effectively shortened by reducing the number of the lenses, but the lack of design freedom caused by the reduction can cause the design difficulty to be obviously increased, and the requirement of high-quality imaging is difficult to meet.

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 first lens having a positive refractive power, an object-side surface of which is convex; a second lens having an optical power; a third lens having optical power; a fourth lens element having a focal power, wherein the object-side surface of the fourth lens element is convex and the image-side surface of the fourth lens element is concave; a fifth lens having a positive optical power; and the object side surface of the sixth lens with negative focal power is a convex surface.

In one embodiment, the distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy TT L/ImgH < 1.6.

In one embodiment, the total effective focal length f of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens can satisfy 4.5mm < f × tan (Semi-FOV) < 7 mm.

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 < 1.9.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens can satisfy: 0.2 < ET1/CT1 < 0.7.

In one embodiment, a distance SAG42 on the optical axis from the intersection point of the image-side surface of the fourth lens and the optical axis to the effective radius vertex of the image-side surface of the fourth lens and 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: 0.1 < SAG42/SAG52 < 0.6.

In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens can satisfy: 0.5 < ET4/CT4 < 1.

In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens may satisfy: f/f5 is more than 0.7 and less than 1.2.

In one embodiment, the effective focal length f2 of the second lens and the effective focal length f6 of the sixth lens may satisfy: 0 < f6/f2 < 1.

In one embodiment, the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens may satisfy: r1/f1 is more than 0.2 and less than 0.7.

In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens may satisfy: 0.5 < R7/R8 < 1.5.

In one embodiment, the effective focal length f5 of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: -1.2 < R10/f5 < -0.2.

In one embodiment, the effective focal length f6 of the sixth lens, the radius of curvature R11 of the object-side surface of the sixth lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: f6/(R12-R11) < 0.1 < 0.6.

In one embodiment, the central thickness CT2 of the second lens on the optical axis and the separation distance T23 of the second lens and the third lens on the optical axis may satisfy: 0.5 < CT2/T23 < 1.

In one embodiment, a separation distance T45 between the fourth lens and the fifth lens on the optical axis and a separation distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 0.5 < T45/T56 < 1.

In one embodiment, the central thickness CT3 of the third lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 0.2 < CT3/CT5 < 0.7.

In one embodiment, the image side surface of the third lens may be concave.

In one embodiment, the fifth lens may have a positive optical power, and the image-side surface thereof may be convex.

In one embodiment, 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.

This application has adopted six lens, through the focal power of rational distribution each lens, face type, the center thickness of each lens and the epaxial interval between each lens etc for above-mentioned optical imaging camera lens has at least one beneficial effect such as big image plane, large aperture, ultra-thin.

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 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 optical power, and the object-side surface thereof may be convex; the second lens has positive focal power or negative focal power; the third lens has positive focal power or negative focal power; the fourth lens has positive focal power or negative focal power, 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 may have a positive optical power; the sixth lens element may have a negative power and the object side surface may be convex. The surface type and the focal power of each lens are reasonably distributed, so that the optical imaging lens has the ultrathin characteristic.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy TT L/ImgH < 1.6, where TT L is a distance on an optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens, and ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens, and more particularly, TT L and ImgH may further satisfy TT L/ImgH < 1.4, TT L/ImgH < 1.6, which may be advantageous in realizing ultra-thinning and high pixel characteristics of the optical imaging lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy 4.5mm < f × tan (Semi-FOV) < 7mm, where f is a total effective focal length of the optical imaging lens and the Semi-FOV is a maximum half field angle of the optical imaging lens, more particularly, f and the Semi-FOV may further satisfy 4.5mm < f × tan (Semi-FOV) < 5mm, for example, 4.5mm < f × tan (Semi-FOV) < 4.7mm, satisfy 4.5mm < f × tan (Semi-FOV) < 7mm, and may be advantageous in achieving a characteristic that the optical imaging lens has a large image plane.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: f/EPD < 1.9, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD may further satisfy: f/EPD < 1.86. The f/EPD is less than 1.9, the f-number of the large-image-plane imaging lens can be smaller, the imaging lens is ensured to have a large-aperture imaging effect, and the lens is enabled to have good imaging quality in a dark environment.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.2 < ET1/CT1 < 0.7, wherein CT1 is the central thickness of the first lens on the optical axis and ET1 is the edge thickness of the first lens. More specifically, CT1 and ET1 further satisfy: 0.25 < ET1/CT1 < 0.50. The requirements that ET1/CT1 is more than 0.2 and less than 0.7 are met, the distortion quantity of the optical imaging lens can be reasonably regulated and controlled, and the first lens has good machinability in the later processing process.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.1 & lt SAG42/SAG52 & lt 0.6, wherein SAG42 is a distance on the optical axis from the intersection point of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth 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, SAG42 and SAG52 further may satisfy: 0.3 < SAG42/SAG52 < 0.5. The optical imaging lens meets the requirement that 0.1 is more than SAG42/SAG52 is more than 0.6, and the relation between the miniaturization of the optical imaging lens and the relative illumination of the off-axis field of view can be better balanced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < ET4/CT4 < 1, wherein CT4 is the central thickness of the fourth lens on the optical axis, and ET4 is the edge thickness of the fourth lens. More specifically, CT4 and ET4 further satisfy: 0.75 < ET4/CT4 < 1.0. The requirement that ET4/CT4 is more than 0.5 and less than 1 is met, the distortion of the optical imaging lens can be controlled within a certain range, and meanwhile, the error sensitivity in the process of manufacturing the optical imaging lens is favorably reduced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.7 < f/f5 < 1.2, wherein f is the total effective focal length of the optical imaging lens, and f5 is the effective focal length of the fifth lens. More specifically, f and f5 further satisfy: f/f5 is more than 0.85 and less than 1.0. The optical imaging lens meets the requirement that f/f5 is more than 0.7 and less than 1.2, the contribution rate of the focal power of the fifth lens can be reasonably controlled, and the high-level spherical aberration generated by the optical imaging lens can be balanced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0 < f6/f2 < 1, where f2 is the effective focal length of the second lens and f6 is the effective focal length of the sixth lens. More specifically, f2 and f6 may further satisfy: f6/f2 is more than 0.05 and less than 0.70. Satisfying 0 < f6/f2 < 1, the focal power of the optical imaging lens can be reasonably distributed, and the positive and negative spherical aberration of the front group lens and the rear group lens can be mutually offset.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.2 < R1/f1 < 0.7, wherein f1 is the effective focal length of the first lens and R1 is the radius of curvature of the object side of the first lens. More specifically, f1 and R1 may further satisfy: r1/f1 is more than 0.35 and less than 0.60. The optical imaging lens meets the requirement that R1/f1 is more than 0.2 and less than 0.7, so that the optical power distribution of the optical imaging lens can be adjusted, the total length of the optical imaging lens is shortened, the optical imaging lens is miniaturized, and the tolerance sensitivity of the optical imaging lens can be balanced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < R7/R8 < 1.5, wherein R7 is the radius of curvature of the object-side surface of the fourth lens and R8 is the radius of curvature of the image-side surface of the fourth lens. More specifically, R7 and R8 may further satisfy: 0.5 < R7/R8 < 1.35. The optical imaging lens meets the requirement that R7/R8 is more than 0.5 and less than 1.5, can reduce the deflection angle of incident light, and enables the optical imaging lens to better realize deflection of an optical path.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -1.2 < R10/f5 < -0.2, wherein f5 is the effective focal length of the fifth lens and R10 is the radius of curvature of the image-side surface of the fifth lens. More specifically, f5 and R10 may further satisfy: -1 < R10/f5 < -0.5. Satisfy-1.2 < R10/f5 < -0.2, can control the third order coma of the fifth lens in the reasonable range, balance the coma amount that the front end optical lens produced, make the optical imaging lens have good image quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.1 < f6/(R12-R11) < 0.6, where f6 is an effective focal length of the sixth lens, R11 is a radius of curvature of an object-side surface of the sixth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens. More specifically, f6, R11, and R12 may further satisfy: f6/(R12-R11) is more than 0.20 and less than 0.40. F6/(R12-R11) is more than 0.1 and less than 0.6, so that chromatic aberration of the optical imaging lens can be better corrected, and imaging quality is improved; and the problem of tolerance sensitivity increase of the optical imaging lens caused by excessive concentration of focal power and excessive bending of the surface can be effectively avoided.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < CT2/T23 < 1, wherein CT2 is the central thickness of the second lens on the optical axis, and T23 is the separation distance between the second lens and the third lens on the optical axis. More specifically, CT2 and T23 further satisfy: 0.55 < CT2/T23 < 0.90. The requirement that the CT2/T23 is more than 0.5 and less than 1 is met, the field curvature of the optical imaging lens can be effectively ensured, and the off-axis visual field area of the optical imaging lens obtains good imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < T45/T56 < 1, wherein T45 is the distance between the fourth lens and the fifth lens on the optical axis, and T56 is the distance between the fifth lens and the sixth lens on the optical axis. More specifically, T45 and T56 may further satisfy: 0.55 < T45/T56 < 0.9. The requirement that T45/T56 is more than 0.5 and less than 1 is met, and the curvature of field contribution of each field of the optical imaging lens can be effectively controlled within a reasonable range.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.2 < CT3/CT5 < 0.7, wherein CT3 is the central thickness of the third lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis. More specifically, CT3 and CT5 further satisfy: 0.4 < CT3/CT5 < 0.55. The requirement that the CT3/CT5 is more than 0.2 and less than 0.7 is met, the distortion contribution amount of each field of view of the optical imaging lens can be effectively controlled within a reasonable range, and the imaging quality of the optical imaging lens is improved.

In an exemplary embodiment, the image side surface of the third lens having optical power may be concave. The image side surface of the third lens is a concave surface, so that the relative illumination of the outer field of view of the optical imaging lens is favorably improved, and the field angle of the optical imaging lens is increased.

In an exemplary embodiment, the fifth lens may have positive optical power, and the image-side surface thereof may be convex. The fifth lens has positive focal power, the image side surface of the fifth lens is a convex surface, the field angle of the optical imaging lens is increased, the incident angle of light rays at the position of the diaphragm is compressed, pupil aberration is reduced, and imaging quality is improved.

In an exemplary embodiment, the sixth lens element may have a negative power, and the object-side surface thereof may be convex and the image-side surface thereof may be concave. The sixth lens has negative focal power, can effectively shorten the total length of the optical imaging lens, and realizes the miniaturization and ultrathin of the lens.

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 image plane, large aperture, ultra-thin and the like. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. 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 convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave 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 the present example, the total effective focal length f of the optical imaging lens is 5.49mm, 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 S15 of the optical imaging lens) is 6.10mm, the half ImgH of the diagonal length of the effective pixel region on the imaging surface S15 of the optical imaging lens is 4.64mm, the maximum half field angle Semi-FOV of the optical imaging lens is 39.5 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens is 1.85.

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. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S12 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.0236E-03

2.4557E-03

-6.1468E-03

2.1808E-03

3.4521E-03

-5.5193E-03

3.1648E-03

-8.5052E-04

7.9033E-05

S2

1.0768E-02

2.5227E-02

-6.5737E-02

1.1039E-01

-1.3083E-01

9.9515E-02

-4.6122E-02

1.1836E-02

-1.2867E-03

S3

3.2327E-02

3.3901E-02

-1.0412E-01

1.7176E-01

-1.9254E-01

1.4420E-01

-6.7835E-02

1.8093E-02

-2.0671E-03

S4

3.7735E-02

2.6122E-02

-9.9504E-02

1.6005E-01

-1.2535E-01

1.6863E-02

5.0039E-02

-3.6475E-02

8.2156E-03

S5

-8.6773E-02

6.7600E-02

-1.9538E-01

3.5884E-01

-4.9311E-01

4.4653E-01

-2.4936E-01

7.6740E-02

-9.6181E-03

S6

-9.6557E-02

8.0589E-02

-1.2978E-01

1.3736E-01

-1.1629E-01

6.9989E-02

-2.6985E-02

6.0332E-03

-5.4187E-04

S7

-1.1406E-01

7.6236E-02

-6.4473E-02

7.6129E-02

-7.3733E-02

4.4076E-02

-1.4929E-02

2.6305E-03

-1.8736E-04

S8

-1.1203E-01

4.7827E-02

-2.2890E-02

1.8027E-02

-1.3443E-02

6.8201E-03

-2.0159E-03

3.0893E-04

-1.8959E-05

S9

-1.3114E-02

-2.9654E-02

2.4984E-02

-1.5425E-02

6.5377E-03

-1.8542E-03

3.3501E-04

-3.3917E-05

1.4363E-06

S10

-4.8798E-02

1.3849E-02

-2.2167E-03

-4.4772E-04

4.7899E-04

-1.3121E-04

1.5627E-05

-7.4997E-07

6.8827E-09

S11

-2.2482E-01

1.0535E-01

-2.8730E-02

5.3527E-03

-6.9500E-04

6.1440E-05

-3.5061E-06

1.1610E-07

-1.6922E-09

S12

-9.0465E-02

3.6207E-02

-9.9055E-03

1.9504E-03

-2.7816E-04

2.7524E-05

-1.7669E-06

6.5535E-08

-1.0568E-09

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 angles of view. 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 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 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 5.48mm, the total length TT L of the optical imaging lens is 6.10mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 4.64mm, the maximum half field angle Semi-FOV of the optical imaging lens is 39.5 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens is 1.85.

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

-4.1181E-03

-6.7713E-03

1.4130E-02

-2.0997E-02

1.6150E-02

-5.9717E-03

6.6527E-05

6.1390E-04

-1.3952E-04

S2

-1.3770E-02

2.4185E-02

-4.9866E-02

9.9059E-02

-1.2684E-01

9.8519E-02

-4.5545E-02

1.1543E-02

-1.2357E-03

S3

-3.2062E-02

6.7553E-02

-7.4279E-02

1.0998E-01

-1.4549E-01

1.2706E-01

-6.6305E-02

1.8862E-02

-2.2376E-03

S4

-1.0881E-02

4.7929E-02

-2.6113E-04

-5.4241E-02

9.1844E-02

-9.6911E-02

7.4282E-02

-3.5095E-02

7.4807E-03

S5

-1.0624E-01

1.2893E-01

-3.7459E-01

7.4099E-01

-1.0189E+00

9.1626E-01

-5.1257E-01

1.6039E-01

-2.1097E-02

S6

-1.1926E-01

1.2589E-01

-2.5207E-01

3.6739E-01

-3.8862E-01

2.7397E-01

-1.2084E-01

3.0008E-02

-3.1264E-03

S7

-1.1890E-01

8.0098E-02

-6.0893E-02

4.1286E-02

-1.9322E-02

2.6167E-03

2.3245E-03

-1.1385E-03

1.5191E-04

S8

-1.1574E-01

5.0400E-02

-1.5963E-02

3.5916E-04

3.8049E-03

-2.0460E-03

5.0635E-04

-6.9380E-05

4.5786E-06

S9

-1.6473E-02

-2.2702E-02

2.0255E-02

-1.1293E-02

4.4494E-03

-1.2661E-03

2.3384E-04

-2.3668E-05

9.7483E-07

S10

-6.7228E-02

4.1071E-02

-2.8195E-02

1.7326E-02

-7.0157E-03

1.7231E-03

-2.4833E-04

1.9360E-05

-6.3061E-07

S11

-2.3950E-01

1.1905E-01

-3.4199E-02

6.5243E-03

-8.4316E-04

7.2758E-05

-4.0086E-06

1.2744E-07

-1.7786E-09

S12

-9.3248E-02

3.8392E-02

-1.0206E-02

1.8448E-03

-2.3365E-04

2.0411E-05

-1.1709E-06

3.9624E-08

-5.9571E-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 angles of view. 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 concave 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 5.49mm, the total length TT L of the optical imaging lens is 6.10mm, the half ImgH of the diagonal length of the effective pixel region on the imaging plane S15 of the optical imaging lens is 4.64mm, the maximum half field angle Semi-FOV of the optical imaging lens is 39.5 °, and the ratio f/EPD of the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens is 1.85.

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 angles of view. 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.

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 concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a 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 concave 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 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

-2.2465E-03

-6.8188E-03

1.7802E-02

-2.8428E-02

2.6134E-02

-1.3620E-02

3.4590E-03

-1.7538E-04

-6.2079E-05

S2

-1.2328E-02

2.5259E-02

-6.1670E-02

1.2501E-01

-1.5951E-01

1.2420E-01

-5.7847E-02

1.4748E-02

-1.5741E-03

S3

-1.0827E-02

5.6093E-02

-8.6083E-02

1.3885E-01

-1.7329E-01

1.4024E-01

-6.8453E-02

1.8276E-02

-2.0236E-03

S4

-3.5806E-03

6.3088E-02

-4.8464E-02

-4.9304E-02

2.5552E-01

-4.0793E-01

3.3653E-01

-1.4317E-01

2.5012E-02

S5

-1.1019E-01

1.4102E-01

-4.7009E-01

1.0730E+00

-1.6386E+00

1.5780E+00

-9.2167E-01

2.9621E-01

-3.9763E-02

S6

-1.0072E-01

5.1088E-02

-2.7389E-02

-8.3956E-02

2.0280E-01

-2.2498E-01

1.3929E-01

-4.6045E-02

6.4299E-03

S7

-8.5646E-02

3.1332E-02

-2.9447E-02

5.4326E-02

-6.5638E-02

4.3531E-02

-1.5513E-02

2.7597E-03

-1.8848E-04

S8

-7.5128E-02

1.3041E-02

-3.8622E-04

8.4805E-03

-1.3327E-02

9.1685E-03

-3.2064E-03

5.5486E-04

-3.7773E-05

S9

-8.8203E-03

-3.0361E-02

2.3024E-02

-1.1125E-02

3.7614E-03

-9.4847E-04

1.6441E-04

-1.5929E-05

6.1552E-07

S10

-7.4885E-02

4.7221E-02

-3.1843E-02

1.9170E-02

-7.6731E-03

1.8835E-03

-2.7336E-04

2.1536E-05

-7.0900E-07

S11

-2.3502E-01

1.2169E-01

-3.7068E-02

7.4515E-03

-9.9870E-04

8.8008E-05

-4.8931E-06

1.5566E-07

-2.1611E-09

S12

-9.1731E-02

3.9062E-02

-1.0680E-02

1.9422E-03

-2.4096E-04

2.0037E-05

-1.0665E-06

3.2964E-08

-4.5146E-10

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 angles of view. 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 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 concave object-side surface S3 and a convex 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 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 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

-6.5635E-03

4.9892E-04

-1.0957E-03

-6.3282E-03

1.1792E-02

-9.9584E-03

4.2116E-03

-8.3723E-04

4.7146E-05

S2

2.6865E-02

-2.5008E-02

-2.4481E-02

9.9061E-02

-1.6012E-01

1.4662E-01

-7.7890E-02

2.2316E-02

-2.6565E-03

S3

-1.9883E-02

3.6186E-02

-6.8566E-02

1.6737E-01

-2.4887E-01

2.2488E-01

-1.2090E-01

3.5384E-02

-4.2873E-03

S4

-5.5878E-03

3.3048E-02

3.1660E-02

-1.6716E-01

3.9709E-01

-5.2226E-01

3.9211E-01

-1.5762E-01

2.6470E-02

S5

-1.1019E-01

1.7412E-01

-5.6389E-01

1.2502E+00

-1.8562E+00

1.7571E+00

-1.0160E+00

3.2492E-01

-4.3720E-02

S6

-1.1744E-01

1.2108E-01

-1.6746E-01

1.2528E-01

-1.7895E-02

-6.9628E-02

7.0822E-02

-2.9311E-02

4.7291E-03

S7

-1.2442E-01

5.3962E-02

5.6489E-02

-1.7504E-01

2.0720E-01

-1.4541E-01

6.1615E-02

-1.4445E-02

1.4335E-03

S8

-1.2248E-01

6.2812E-02

-2.6796E-02

9.3682E-03

-4.1058E-03

2.2063E-03

-7.1773E-04

1.0649E-04

-5.2754E-06

S9

-1.3700E-02

-2.7890E-02

2.3685E-02

-1.1569E-02

3.9568E-03

-1.0018E-03

1.6873E-04

-1.5736E-05

5.9726E-07

S10

-6.3576E-02

3.9138E-02

-2.6327E-02

1.5766E-02

-6.0571E-03

1.3847E-03

-1.8410E-04

1.3200E-05

-3.9527E-07

S11

-2.2839E-01

1.0776E-01

-2.9494E-02

5.4502E-03

-6.9486E-04

6.0098E-05

-3.3614E-06

1.0956E-07

-1.5788E-09

S12

-9.2684E-02

3.6712E-02

-9.4526E-03

1.6623E-03

-2.0446E-04

1.7195E-05

-9.3485E-07

2.9427E-08

-4.0471E-10

Watch 10

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different angles of view. 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 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 concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has 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 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

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 angles of view. 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.

Conditional expression (A) example	1	2	3	4	5	6
							TTL/ImgH	1.32	1.32	1.32	1.32	1.32	1.32
f×tan(Semi-FOV)(mm)	4.53	4.52	4.52	4.52	4.52	4.52
							ET1/CT1	0.32	0.31	0.30	0.30	0.45	0.33
SAG42/SAG52	0.31	0.42	0.34	0.33	0.48	0.36
							ET4/CT4	0.80	0.84	0.97	0.89	0.86	0.90
f/f5	0.99	0.96	0.88	0.91	0.98	0.89
							f6/f2	0.66	0.37	0.32	0.39	0.10	0.36
R1/f1	0.55	0.44	0.45	0.45	0.38	0.44
							R7/R8	1.03	0.86	0.51	0.72	1.34	1.03
R10/f5	-0.72	-0.79	-0.76	-0.53	-0.90	-0.77
							f6/(R12-R11)	0.27	0.31	0.29	0.32	0.39	0.31
CT2/T23	0.59	0.60	0.78	0.86	0.72	0.82
							T45/T56	0.67	0.71	0.87	0.85	0.56	0.78
CT3/CT5	0.48	0.51	0.54	0.50	0.42	0.46

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 positive refractive power, an object-side surface of which is convex;

a second lens having an optical power;

a third lens having optical power;

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

a fifth lens having a positive optical power;

a sixth lens element having a negative refractive power, the object-side surface of which is convex;

the distance TT L between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface meet the condition that TT L/ImgH is less than 1.6;

the total effective focal length f of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens meet 4.5mm < f × tan (Semi-FOV) < 7 mm.

2. The optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on the optical axis and an edge thickness ET1 of the first lens satisfy: 0.2 < ET1/CT1 < 0.7.

3. The optical imaging lens of claim 1, wherein a distance SAG42 on the optical axis from an intersection point of an image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth 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: 0.1 < SAG42/SAG52 < 0.6.

4. The optical imaging lens of claim 1, wherein a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens satisfy: 0.5 < ET4/CT4 < 1.

5. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens satisfy: f/f5 is more than 0.7 and less than 1.2.

6. The optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens and the effective focal length f6 of the sixth lens satisfy: 0 < f6/f2 < 1.

7. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens satisfy: r1/f1 is more than 0.2 and less than 0.7.

8. The optical imaging lens of claim 1, wherein the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens satisfy: 0.5 < R7/R8 < 1.5.

9. The optical imaging lens of claim 1, wherein the effective focal length f5 of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: -1.2 < R10/f5 < -0.2.

10. The optical imaging lens of claim 1, wherein an effective focal length f6 of the sixth lens, a radius of curvature R11 of an object side surface of the sixth lens, and a radius of curvature R12 of an image side surface of the sixth lens satisfy: f6/(R12-R11) < 0.1 < 0.6.

11. The optical imaging lens of claim 1, wherein a center thickness CT2 of the second lens on the optical axis and a separation distance T23 of the second lens and the third lens on the optical axis satisfy: 0.5 < CT2/T23 < 1.

12. The optical imaging lens according to claim 1, wherein a separation distance T45 between the fourth lens and the fifth lens on the optical axis and a separation distance T56 between the fifth lens and the sixth lens on the optical axis satisfy: 0.5 < T45/T56 < 1.

13. The optical imaging lens of claim 1, wherein a center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 0.2 < CT3/CT5 < 0.7.

14. The optical imaging lens of any one of claims 1 to 13, wherein the image side surface of the third lens is concave.

15. The optical imaging lens of claim 14, wherein the image side surface of the fifth lens element is convex.

16. The optical imaging lens of claim 15, wherein the sixth lens element has a convex object-side surface and a concave image-side surface.

17. The optical imaging lens of any one of claims 1 to 13, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD < 1.9.

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

a second lens having an optical power;

a third lens having optical power;

a fifth lens having a positive optical power;

the total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens meet the following conditions: f/f5 is more than 0.7 and less than 1.2; and

19. The optical imaging lens of claim 18, wherein a center thickness CT1 of the first lens on the optical axis and an edge thickness ET1 of the first lens satisfy: 0.2 < ET1/CT1 < 0.7.

20. The optical imaging lens of claim 18, wherein a distance SAG42 on the optical axis from an intersection point of the image-side surface of the fourth lens and the optical axis to an effective radius vertex of the image-side surface of the fourth lens to a distance SAG52 on the optical axis from an intersection point of the 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: 0.1 < SAG42/SAG52 < 0.6.

21. The optical imaging lens of claim 18, wherein a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens satisfy: 0.5 < ET4/CT4 < 1.

22. The optical imaging lens of claim 18, wherein the effective focal length f2 of the second lens and the effective focal length f6 of the sixth lens satisfy: 0 < f6/f2 < 1.

23. The optical imaging lens of claim 18, wherein the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens satisfy: r1/f1 is more than 0.2 and less than 0.7.

24. The optical imaging lens of claim 18, wherein the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens satisfy: 0.5 < R7/R8 < 1.5.

25. The optical imaging lens of claim 18, wherein the effective focal length f5 of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: -1.2 < R10/f5 < -0.2.

26. The optical imaging lens of claim 25, wherein the image side surface of the fifth lens element is convex.

27. The optical imaging lens of claim 18, wherein the effective focal length f6 of the sixth lens, the radius of curvature R11 of the object-side surface of the sixth lens, and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: f6/(R12-R11) < 0.1 < 0.6.

28. The optical imaging lens of claim 27, wherein the sixth lens element has a convex object-side surface and a concave image-side surface.

29. The optical imaging lens of claim 18, wherein the central thickness CT2 of the second lens on the optical axis is separated from the second and third lenses on the optical axis by a distance T23 that satisfies: 0.5 < CT2/T23 < 1.

30. The optical imaging lens of claim 18, wherein a separation distance T45 between the fourth lens and the fifth lens on the optical axis and a separation distance T56 between the fifth lens and the sixth lens on the optical axis satisfy: 0.5 < T45/T56 < 1.

31. The optical imaging lens of claim 18, wherein a center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 0.2 < CT3/CT5 < 0.7.

32. The optical imaging lens of any one of claims 19 to 31, wherein a distance TT L between an object side surface of the first lens 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 satisfy TT L/ImgH < 1.6.

33. The optical imaging lens of any one of claims 18 to 31, wherein the image side surface of the third lens is concave.

34. The optical imaging lens of any one of claims 18 to 31, wherein the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD < 1.9.