CN111722368A

CN111722368A - Optical imaging lens

Info

Publication number: CN111722368A
Application number: CN202010678706.9A
Authority: CN
Inventors: 巫祥曦; 徐武超; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2020-09-29

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 refractive power, an object side surface of which is concave; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having a negative optical power; a fifth lens having optical power; and a sixth lens having optical power; the maximum field angle FOV of the optical imaging lens satisfies the following conditions: 90 < FOV < 120; half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens, the total effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy the following conditional expressions: ImgH > 4.5 mm; f/EPD < 2; and f/ImgH is not less than 0.9.

Description

Optical imaging lens

Technical Field

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

Background

Along with the rapid research and development and the manufacturing of intelligent terminals such as smart phones, unmanned aerial vehicles and smart home monitoring equipment, the requirements on the aspects of imaging quality, appearance design and the like of an optical imaging lens on the market are higher and higher. However, the existing miniaturized optical imaging lens still has the problems of small imaging size, large lens thickness and the like, and generally cannot meet the requirement of small lens thickness while ensuring large image plane characteristics. In addition, in a dark environment, the amount of light passing through the optical imaging lens is insufficient, which causes more noise in night view imaging.

How to make an optical imaging lens with a smaller size capable of satisfying the characteristics of a large image plane, ultra-thinness, good imaging quality, etc., is one of the problems to be solved by many lens designers at present.

Disclosure of Invention

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 refractive power, an object side surface of which is concave; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having a negative optical power; a fifth lens having optical power; and a sixth lens having optical power; the maximum field angle FOV of the optical imaging lens can satisfy: 90 < FOV < 120; half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens, the total effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens may satisfy the following conditional expression: ImgH > 4.5 mm; f/EPD < 2; and f/ImgH is not less than 0.9.

In one embodiment, the object-side surface of the first lens element and the image-side surface of the sixth lens element have at least one aspheric mirror surface.

In one embodiment, the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 0.4 < R6/R2 < 0.9.

In one embodiment, the combined focal length f12 of the first and second lenses and the combined focal length f345 of the third, fourth, and fifth lenses may satisfy: f345/f12 is more than 0.2 and less than 0.7.

In one embodiment, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens may satisfy: f5/f3+ f6/f4 is more than 0.5 and less than 1.0.

In one embodiment, 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 and 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 may satisfy: 0.5 < SAG61/SAG52 < 1.0.

In one embodiment, a distance SAG21 on the optical axis from the intersection point of the object-side surface of the second lens and the optical axis to the effective radius vertex of the object-side surface of the second lens and a distance SAG32 on the optical axis from the intersection point of the image-side surface of the third lens and the optical axis to the effective radius vertex of the image-side surface of the third lens may satisfy: -1.0 < SAG32/SAG21 < -0.5.

In one embodiment, the edge thickness ET1 of the first lens and the edge thickness ET6 of the sixth lens may satisfy: 0.3 < ET1/ET6 < 0.8.

In one embodiment, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, the maximum effective radius DT31 of the object-side surface of the third lens, and the maximum effective radius DT42 of the image-side surface of the fourth lens may satisfy: 0.5 < ET3/DT31+ ET4/DT42 < 1.0.

In one embodiment, the maximum effective radius DT12 of the image-side surface of the first lens and the maximum effective radius DT61 of the object-side surface of the sixth lens may satisfy: 0.5 < DT12/DT61 < 1.0.

In one embodiment, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the radius of curvature R12 of the image-side surface of the sixth lens may satisfy: 0.5 < R3/R4+ R12/R8 < 1.0.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0.3 < (f1+ f2)/(f1-f2) < 0.8.

In one embodiment, the total effective focal length f of the optical imaging lens, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R10 of the image-side surface of the fifth lens may satisfy: R10/f-R1/f is more than 0.5 and less than 1.0.

In one embodiment, a central thickness CT1 of the first lens on the optical axis, a central thickness CT2 of the second lens on the optical axis, a central thickness CT5 of the fifth lens on the optical axis, and a central thickness CT6 of the sixth lens on the optical axis may satisfy: 0.5 < (CT1+ CT2)/(CT5+ CT6) < 1.0.

In one embodiment, a sum Σ AT of a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a separation distance on the optical axis of any adjacent two lenses of the first lens to the sixth lens may satisfy: 0.6 < (CT3+ CT 4)/Sigma AT < 1.1.

Another aspect of the present disclosure provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens having a refractive power, an object side surface of which is concave; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having a negative optical power; a fifth lens having optical power; and a sixth lens having optical power. The maximum field angle FOV of the optical imaging lens satisfies the following conditions: 90 < FOV < 120; the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfies: ImgH > 4.5 mm; the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following conditions: f/EPD < 2; and the curvature radius R2 of the image side surface of the first lens and the curvature radius R6 of the image side surface of the third lens satisfy: 0.4 < R6/R2 < 0.9.

In one embodiment, the total effective focal length f of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens may satisfy: f/ImgH is more than or equal to 0.9.

The optical imaging lens is applicable to portable electronic products and has at least one beneficial effect of miniaturization, ultrathin, large image plane, large aperture, good imaging quality 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; and

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 or negative optical power, and the object-side surface thereof may be concave; the second lens may have a positive or negative optical power; the third lens may have a positive optical power; the fourth lens may have a negative optical power; the fifth lens may have a positive power or a negative power; and the sixth lens may have a positive power or a negative power.

In an exemplary embodiment, the first lens with the concave object-side surface, the third lens with positive focal power and the fourth lens with negative focal power are matched, so that the optical system has better imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 90 < FOV < 120, where FOV is the maximum field angle of the optical imaging lens. More specifically, the FOV may further satisfy: 91 < FOV < 98. The wide-angle characteristic is realized by meeting the condition that the FOV is more than 90 degrees and less than 120 degrees.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: ImgH > 4.5mm, wherein ImgH is half the length of the diagonal line of the effective pixel area on the imaging surface of the optical imaging lens. The ImgH is more than 4.5mm, and the realization of large image surface characteristics is facilitated.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: f/EPD < 2, 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 2, so that the system has a larger aperture and can obtain higher imaging quality in a darker scene.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: f/ImgH is more than or equal to 0.9, wherein f is the total effective focal length of the optical imaging lens, and ImgH is half of the diagonal length of an effective pixel area on an imaging surface of the optical imaging lens. The f/ImgH is more than or equal to 0.9, and the total effective focal length of the optical imaging lens can be restricted within a reasonable range.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.4 < R6/R2 < 0.9, wherein R2 is the radius of curvature of the image-side surface of the first lens, and R6 is the radius of curvature of the image-side surface of the third lens. More specifically, R6 and R2 may further satisfy: 0.5 < R6/R2 < 0.8. The requirement of 0.4 < R6/R2 < 0.9 can control the aberration contribution amount of the first lens and the third lens to the system within a reasonable range.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.2 < f345/f12 < 0.7, wherein f12 is the combined focal length of the first lens and the second lens, and f345 is the combined focal length of the third lens, the fourth lens and the fifth lens. More specifically, f345 and f12 further satisfy: f345/f12 is more than 0.2 and less than 0.5. Satisfying 0.2 < f345/f12 < 0.7, is beneficial to the reasonable distribution of the front and the rear lens groups in space, and is beneficial to reducing the aberration of the optical system.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < f5/f3+ f6/f4 < 1.0, wherein f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, and f6 is the effective focal length of the sixth lens. More specifically, f5, f3, f6 and f4 may further satisfy: f5/f3+ f6/f4 is more than 0.6 and less than 0.9. The requirement that f5/f3+ f6/f4 is 0.5 < f5/f3+ f6/f4 < 1.0 is met, and the optical power of the optical system is favorably and reasonably distributed so as to reduce tolerance sensitivity of each lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 & lt SAG61/SAG52 & lt 1.0, wherein 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, and 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. The surface type characteristics of the fifth lens and the sixth lens can be optimized when the SAG61/SAG52 is more than 0.5 and less than 1.0, the opening angle of the object side surface of the sixth lens is smaller than the opening angle of the image side surface of the fifth lens, and the optical system is favorably ensured to have good imaging stability.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -1.0 < SAG32/SAG21 < -0.5, wherein SAG21 is the distance on the optical axis from the intersection of the object-side surface of the second lens and the optical axis to the vertex of the effective radius of the object-side surface of the second lens, and SAG32 is the distance on the optical axis from the intersection of the image-side surface of the third lens and the optical axis to the vertex of the effective radius of the image-side surface of the third lens. More specifically, SAG32 and SAG21 further may satisfy: -1.0 < SAG32/SAG21 < -0.6. Satisfy-1.0 < SAG32/SAG21 < -0.5, can optimize the face type characteristic of third lens and second lens, guarantee that optical system has good formation of image stability, can also facilitate processing.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.3 < ET1/ET6 < 0.8, wherein ET1 is the edge thickness of the first lens and ET6 is the edge thickness of the sixth lens. The requirements of ET1/ET6 of 0.3 and ET 358 are less than 0.8, and the reliability of lens molding and lens assembly can be improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < ET3/DT31+ ET4/DT42 < 1.0, wherein ET3 is the edge thickness of the third lens, ET4 is the edge thickness of the fourth lens, DT31 is the maximum effective radius of the object side surface of the third lens, and DT42 is the maximum effective radius of the image side surface of the fourth lens. More specifically, ET3, DT31, ET4 and DT42 may further satisfy: 0.6 < ET3/DT31+ ET4/DT42 < 1.0. The requirements of 0.5 & lt ET3/DT31+ ET4/DT42 & lt 1.0 are met, and the processing, molding and assembling of the third lens and the fourth lens are facilitated.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < DT12/DT61 < 1.0, where DT12 is the maximum effective radius of the image-side face of the first lens and DT61 is the maximum effective radius of the object-side face of the sixth lens. More specifically, DT12 and DT61 further satisfy: 0.5 < DT12/DT61 < 0.8. The size distribution of the first lens to the sixth lens on space can be optimized to be favorable for assembling and manufacturing the lens, and the DT12/DT61 is more than 0.5 and less than 1.0.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < R3/R4+ R12/R8 < 1.0, wherein R3 is a radius of curvature of an object-side surface of the second lens, R4 is a radius of curvature of an image-side surface of the second lens, R8 is a radius of curvature of an image-side surface of the fourth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens. More specifically, R3, R4, R12 and R8 may further satisfy: 0.6 < R3/R4+ R12/R8 < 0.9. The requirements of 0.5 < R3/R4+ R12/R8 < 1.0 are met, and the contribution amount of the second lens, the fourth lens and the sixth lens to the system aberration is favorably and reasonably adjusted and distributed.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.3 < (f1+ f2)/(f1-f2) < 0.8, wherein f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. More specifically, f1 and f2 may further satisfy: 0.5 < (f1+ f2)/(f1-f2) < 0.8. Satisfying 0.3 < (f1+ f2)/(f1-f2) < 0.8, the spherical aberration contribution amount of the first lens and the second lens to the system can be effectively restrained, so that the on-axis field of view can obtain good imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < R10/f-R1/f < 1.0, where f is the total effective focal length of the optical imaging lens, R1 is the radius of curvature of the object-side surface of the first lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. More specifically, R10, f and R1 may further satisfy: R10/f-R1/f is more than 0.5 and less than 0.8. The requirement that R10/f-R1/f is more than 0.5 and less than 1.0 is met, the curvature radiuses of the object side surface and the image side surface of the fifth lens can be restricted within a reasonable range, and the reasonable control of the image quality in the inner view field aperture band is facilitated.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < (CT1+ CT2)/(CT5+ CT6) < 1.0, wherein CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, and CT6 is the central thickness of the sixth lens on the optical axis. Satisfy 0.5 < (CT1+ CT2)/(CT5+ CT6) < 1.0, be favorable to improving the homogeneity of each lens thickness and the reliability of lens processing.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.6 < (CT3+ CT4)/Σ AT < 1.1, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, and Σ AT is the sum of the separation distances on the optical axis of any adjacent two lenses of the first lens to the sixth lens. The thickness of the lens meets 0.6 < (CT3+ CT 4)/Sigma AT < 1.1, the total length of the optical system can be ensured to be in a reasonable range, and the uniformity of the thickness of each lens of the system can be optimized.

In an exemplary embodiment, an optical imaging lens according to the present application further includes a stop disposed between the second lens and the third lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element on the imaging surface. The application provides an optical imaging lens with the characteristics of miniaturization, ultrathin, large image plane, large aperture, high imaging quality 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, the above six lenses. By reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the optical imaging lens is more beneficial to production and processing.

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

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the optical imaging lens is not limited to including six lenses. The optical imaging lens may also include other numbers of lenses, if desired.

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

Example 1

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

As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a stop STO, 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 negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave 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 1 shows a basic parameter table of the optical imaging lens of embodiment 1, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 1

In this example, the total effective focal length f of the optical imaging lens is 4.54mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 6.98mm, the half ImgH of the diagonal length of the effective pixel region on the imaging surface S15 of the optical imaging lens is 4.97mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field angle FOV of the optical imaging lens is 96.7 °.

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

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

6.3085E-01

-4.7398E-02

9.4998E-03

-3.1034E-03

9.3559E-04

-3.5183E-04

1.1920E-04

S2

3.2753E-01

-1.3090E-02

2.1265E-03

-5.5982E-04

1.4223E-04

-3.0131E-05

2.8453E-05

S3

2.7281E-02

6.6911E-03

2.6251E-04

7.1989E-04

1.7542E-04

6.6243E-05

3.0722E-05

S4

-2.4594E-02

3.4759E-03

2.8477E-04

2.0158E-04

3.9104E-05

1.1354E-05

5.2828E-06

S5

-7.9110E-02

-6.5822E-03

-6.2037E-04

-8.1551E-05

-8.7442E-06

-1.0939E-05

-3.3361E-06

S6

-1.8970E-01

-7.7262E-03

-2.3694E-03

-6.1805E-04

-1.7812E-04

-5.7348E-05

-1.0495E-05

S7

-2.6507E-01

1.5718E-02

-5.9763E-04

-7.8804E-04

-2.7412E-04

-4.1767E-05

-3.3334E-05

S8

-2.3244E-01

4.7202E-02

-1.5629E-03

6.2431E-04

1.4454E-04

-1.8486E-04

-7.7120E-05

S9

-2.4829E-02

3.5725E-02

2.5995E-03

-4.7155E-03

-7.2186E-04

-5.2457E-04

2.4797E-04

S10

4.6722E-01

5.8444E-02

-4.2685E-03

-3.2263E-02

3.8790E-03

3.1646E-03

5.8731E-04

S11

-1.5138E+00

6.0688E-01

-1.5360E-01

1.5834E-02

-1.4911E-03

4.6789E-03

-1.6535E-03

S12

-1.0057E+01

1.2945E+00

-5.1178E-01

2.1902E-01

-1.1192E-01

3.1056E-02

-3.3628E-02

TABLE 2-1

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-7.1374E-05

1.6398E-05

0.0000E+00

S2

-2.4568E-05

1.6769E-06

0.0000E+00

S3

3.0686E-06

1.1956E-06

0.0000E+00

S4

-3.0338E-07

-3.2793E-07

0.0000E+00

S5

4.1242E-07

2.2801E-06

0.0000E+00

S6

1.0527E-06

5.5335E-06

0.0000E+00

S7

-4.1537E-06

-1.1931E-05

0.0000E+00

S8

2.3311E-05

9.1454E-07

0.0000E+00

S9

2.2403E-04

8.1430E-05

5.7306E-05

7.8431E-05

3.4322E-05

0.0000E+00

S10

-1.5931E-03

-1.4632E-04

2.3979E-04

2.9056E-04

2.0300E-05

0.0000E+00

S11

-1.2065E-03

8.6715E-04

-1.7404E-04

1.0063E-04

-1.9256E-04

1.6918E-04

-5.2779E-05

S12

2.6670E-03

-1.0401E-02

2.3301E-03

-3.9607E-04

2.2730E-03

7.5186E-04

6.7833E-04

Tables 2 to 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different 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 first lens E1, a second lens E2, a stop STO, 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 negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave 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.

In this example, the total effective focal length f of the optical imaging lens is 4.31mm, the total length TTL of the optical imaging lens is 7.26mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.79mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field angle FOV of the optical imaging lens is 97.6 °.

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

TABLE 3

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

6.1527E-01

-4.6086E-02

1.1878E-02

-3.0416E-03

1.0187E-03

-3.0989E-04

1.1287E-04

S2

3.2266E-01

-1.5151E-02

4.2025E-03

-5.6685E-04

2.7491E-04

-2.5190E-05

2.1906E-05

S3

3.1181E-02

9.5746E-03

1.8832E-03

1.0677E-03

3.5929E-04

1.3938E-04

5.5100E-05

S4

-2.1561E-02

5.7321E-03

7.0696E-04

4.6184E-04

1.1993E-04

4.7148E-05

1.0878E-05

S5

-8.5459E-02

-7.6360E-03

-4.7492E-04

1.4408E-04

1.0021E-04

4.0523E-05

1.2483E-05

S6

-1.8812E-01

-5.6356E-03

-3.3470E-03

-4.9736E-04

-1.8819E-04

-4.0193E-05

8.3521E-06

S7

-2.5688E-01

2.3885E-02

-1.9154E-03

-7.5713E-05

-1.8248E-04

-3.4984E-05

-2.3345E-05

S8

-1.8935E-01

4.6676E-02

-5.0133E-03

1.2256E-03

-1.0977E-04

-2.6271E-04

-5.9871E-05

S9

4.9143E-02

5.0320E-02

-2.9121E-03

-5.1604E-03

7.6584E-04

-3.2527E-04

1.4424E-04

S10

5.6572E-01

6.9477E-02

1.6204E-02

-3.9959E-02

9.2927E-03

2.1975E-03

5.5927E-04

S11

-1.5556E+00

5.9744E-01

-1.5542E-01

1.7526E-02

2.7701E-03

-4.2960E-03

4.7744E-04

S12

-1.0979E+01

1.1990E+00

-6.1957E-01

1.9380E-01

-1.1699E-01

3.5026E-02

-3.0454E-02

TABLE 4-1

TABLE 4-2

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different 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 first lens E1, a second lens E2, a stop STO, 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 negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave 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 concave 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 4.50mm, the total length TTL of the optical imaging lens is 7.40mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.79mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field angle FOV of the optical imaging lens is 92.1 °.

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 6-1, 6-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

6.1715E-01

-4.4745E-02

1.1339E-02

-2.8811E-03

9.1717E-04

-2.7960E-04

9.8039E-05

S2

3.0898E-01

-1.6219E-02

3.7062E-03

-8.6361E-04

3.0431E-04

-9.3226E-05

4.4085E-05

S3

4.1209E-02

6.8630E-03

7.8423E-04

2.0641E-04

9.7232E-05

1.5883E-05

1.0131E-05

S4

-1.8391E-02

4.4570E-03

1.9710E-04

2.2199E-04

2.5907E-05

7.3316E-06

-6.6269E-06

S5

-8.7081E-02

-9.1970E-03

-1.4737E-03

-2.9307E-04

-5.1097E-05

-1.3370E-05

2.5561E-06

S6

-1.8849E-01

-7.1506E-03

-3.9205E-03

-5.6349E-04

-1.8517E-04

-2.4569E-05

2.1251E-05

S7

-2.6701E-01

2.3622E-02

-2.2451E-03

9.7390E-05

-1.3726E-04

-3.9248E-05

-2.0663E-05

S8

-2.1062E-01

4.9363E-02

-3.7016E-03

8.9437E-04

-1.2726E-04

-1.9772E-04

6.6839E-06

S9

7.8763E-02

4.3911E-02

-5.2955E-03

-3.7585E-03

1.0267E-03

-1.6460E-04

1.8587E-04

S10

5.7335E-01

4.4439E-02

1.0959E-02

-3.0970E-02

7.2113E-03

1.0943E-03

1.0937E-03

S11

-1.3363E+00

4.9141E-01

-1.4257E-01

3.0819E-03

-7.4116E-04

-2.4748E-03

-3.9237E-03

S12

-1.0766E+01

1.4153E+00

-5.5902E-01

2.1492E-01

-1.1839E-01

3.4483E-02

-4.9655E-02

TABLE 6-1

TABLE 6-2

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different 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 first lens E1, a second lens E2, a stop STO, 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 negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a 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.

In this example, the total effective focal length f of the optical imaging lens is 4.40mm, the total length TTL of the optical imaging lens is 6.98mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.60mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field angle FOV of the optical imaging lens is 93.3 °.

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Tables 8-1, 8-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

6.2846E-01

-4.5886E-02

1.2004E-02

-3.0266E-03

9.8712E-04

-3.0421E-04

1.1439E-04

S2

3.1800E-01

-1.1144E-02

4.2695E-03

-5.3851E-04

3.0226E-04

-5.1565E-05

4.3215E-05

S3

3.8671E-02

6.2072E-03

3.9495E-04

2.9643E-04

1.0858E-04

2.5250E-05

1.8942E-05

S4

-2.4283E-02

2.5304E-03

2.4286E-05

1.6260E-04

1.8419E-05

9.3210E-06

-4.8624E-07

S5

-9.6385E-02

-9.3234E-03

-1.4572E-03

-3.7215E-04

-8.2696E-05

-2.1079E-05

8.0772E-06

S6

-2.0828E-01

-9.4259E-03

-5.4778E-03

-6.5157E-04

9.1829E-05

2.7300E-04

2.1878E-04

S7

-2.7921E-01

2.1539E-02

-4.5626E-03

-7.0458E-04

-2.3114E-04

-1.2479E-04

-5.3653E-05

S8

-2.1365E-01

4.6073E-02

-3.6536E-03

1.7274E-03

-1.7508E-04

-6.2647E-04

-4.8092E-05

S9

6.5597E-02

3.9536E-02

3.2910E-03

-6.1277E-03

-4.5846E-04

-4.0185E-04

6.1669E-04

S10

5.3615E-01

3.2272E-02

-8.2231E-03

-3.2210E-02

1.3393E-02

3.9953E-03

-3.4881E-04

S11

-9.8251E-01

5.1972E-01

-1.8322E-01

3.5871E-02

2.4825E-03

-3.1912E-03

1.1701E-04

S12

-1.0915E+01

1.4330E+00

-6.0060E-01

1.6694E-01

-1.2270E-01

4.3485E-02

-4.1493E-02

TABLE 8-1

TABLE 8-2

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different 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 first lens E1, a second lens E2, a stop STO, 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 negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has 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 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.

In this example, the total effective focal length f of the optical imaging lens is 4.41mm, the total length TTL of the optical imaging lens is 6.98mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.60mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field angle FOV of the optical imaging lens is 93.5 °.

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). Tables 10-1, 10-2 show the 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 the formula (1) given in example 1 above.

TABLE 9

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

6.3220E-01

-4.7063E-02

1.1187E-02

-3.1293E-03

9.5859E-04

-3.0673E-04

1.1328E-04

S2

3.1916E-01

-1.1352E-02

3.0601E-03

-7.5443E-04

2.2020E-04

-6.6932E-05

4.2128E-05

S3

3.5503E-02

6.2456E-03

2.8197E-04

2.0254E-04

7.9711E-05

3.8570E-06

1.7436E-05

S4

-1.7902E-02

4.5648E-03

6.0739E-04

2.8828E-04

6.4427E-05

1.7496E-05

-2.9328E-07

S5

-9.3905E-02

-8.8212E-03

-1.0721E-03

-1.9558E-04

-2.3650E-05

-2.8328E-06

1.1372E-05

S6

-2.0849E-01

-9.0994E-03

-4.3756E-03

-8.6300E-04

-1.1084E-04

7.8166E-05

1.0887E-04

S7

-2.7345E-01

2.7319E-02

-2.4630E-03

-8.6676E-04

-7.6007E-05

-4.8647E-05

-2.3166E-05

S8

-2.0195E-01

4.8687E-02

-4.8111E-03

1.3703E-03

1.4372E-04

-5.6559E-04

-3.7732E-05

S9

5.7503E-02

3.5761E-02

1.6255E-02

-4.1787E-03

-4.7267E-03

-2.6114E-03

1.0175E-03

S10

8.1799E-01

4.4062E-03

1.4006E-02

-2.1726E-02

5.6896E-03

1.1056E-03

8.5241E-04

S11

-1.0004E+00

5.0692E-01

-1.8547E-01

3.7352E-02

9.4700E-04

-1.6098E-03

1.7606E-05

S12

-1.0431E+01

1.3225E+00

-6.1245E-01

1.8442E-01

-1.1308E-01

3.8549E-02

-4.6002E-02

TABLE 10-1

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-3.4318E-05

4.5078E-06

0.0000E+00

S2

-1.7044E-05

2.1247E-06

0.0000E+00

S3

-6.0929E-07

1.0357E-06

0.0000E+00

S4

-3.6818E-06

-1.7780E-06

0.0000E+00

S5

7.9560E-06

6.7485E-06

0.0000E+00

S6

6.5800E-05

2.7769E-05

0.0000E+00

S7

-6.3378E-06

-2.7409E-06

-4.7819E-07

0.0000E+00

S8

2.3766E-05

1.5892E-05

0.0000E+00

S9

9.0637E-04

-5.4878E-06

-2.2984E-04

-4.3432E-05

2.6192E-05

0.0000E+00

S10

-9.1602E-04

-2.0010E-04

-2.2292E-04

3.3884E-05

8.0730E-05

5.1396E-05

-2.0949E-05

S11

-4.4686E-04

1.0332E-03

-8.1197E-04

4.7765E-04

-3.8010E-04

2.0982E-04

-4.4164E-05

S12

-9.3621E-03

-1.8591E-02

2.5817E-04

-3.1371E-04

2.9010E-03

1.1168E-03

9.5417E-04

Table 10-2 fig. 10A shows a chromatic aberration curve on the axis of the optical imaging lens of embodiment 5, which indicates that light rays of different wavelengths deviate from the convergent focus 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 first lens E1, a second lens E2, a stop STO, 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 negative power, and has a concave object-side surface S1 and a convex image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave 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 concave 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 4.40mm, the total length TTL of the optical imaging lens is 7.02mm, a half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 4.79mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is 1.88, and the maximum field angle FOV of the optical imaging lens is 93.3 °.

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). Tables 12-1, 12-2 show the 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 the formula (1) given in example 1 above.

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

6.3361E-01

-4.4407E-02

1.2365E-02

-2.8391E-03

1.0292E-03

-2.9446E-04

1.1170E-04

S2

3.1928E-01

-1.5087E-02

4.8405E-03

-6.6712E-04

4.0454E-04

-7.1830E-05

5.3724E-05

S3

3.6948E-02

4.6170E-03

7.7313E-04

4.8524E-04

2.3681E-04

6.4353E-05

3.0392E-05

S4

-2.5418E-02

2.3974E-03

9.7477E-05

2.1406E-04

2.7415E-05

1.2006E-05

-3.6409E-07

S5

-9.9000E-02

-1.0371E-02

-1.7642E-03

-4.6988E-04

-1.2607E-04

-4.0247E-05

-9.6572E-07

S6

-2.1594E-01

-1.4023E-02

-5.6922E-03

-1.5245E-03

-3.4783E-04

2.1189E-05

1.0517E-04

S7

-2.7679E-01

1.4710E-02

-4.8644E-03

-1.4808E-03

-7.6608E-04

-3.1736E-04

-1.5480E-04

S8

-2.4164E-01

4.6425E-02

-6.0878E-03

1.1942E-03

6.6337E-05

-4.7925E-04

3.5782E-05

S9

-5.6180E-02

5.1654E-02

-7.5486E-03

-5.6789E-04

7.7677E-04

-8.0517E-04

4.2228E-04

S10

6.1255E-01

5.7301E-02

6.3291E-03

-2.5236E-02

6.8696E-03

1.4057E-03

2.5234E-04

S11

-9.5891E-01

5.3085E-01

-1.9393E-01

3.5744E-02

4.3897E-03

-1.2406E-03

-1.0670E-03

S12

-9.8294E+00

1.4126E+00

-6.2469E-01

1.6429E-01

-1.2061E-01

4.2256E-02

-3.4710E-02

TABLE 12-1

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-3.8933E-05

5.9452E-06

0.0000E+00

S2

-1.7910E-05

3.1618E-06

0.0000E+00

S3

4.4082E-06

2.6789E-07

0.0000E+00

S4

-2.0562E-06

-8.5495E-07

0.0000E+00

S5

3.9257E-06

6.3633E-06

0.0000E+00

S6

6.6579E-05

2.6594E-05

0.0000E+00

S7

-5.3506E-05

-2.4601E-05

0.0000E+00

S8

4.1405E-05

2.4826E-06

0.0000E+00

S9

-3.4484E-05

-3.5812E-05

3.2847E-07

1.1578E-05

-3.4634E-06

0.0000E+00

S10

-9.9539E-04

2.4041E-04

6.0669E-05

3.2339E-05

-2.5517E-05

0.0000E+00

S11

1.1685E-04

7.9893E-04

-7.2890E-04

3.6092E-04

-3.1347E-04

1.0450E-04

5.9739E-06

S12

1.8924E-03

-1.3228E-02

9.0739E-05

-2.9631E-03

6.3053E-05

-8.1840E-04

3.1662E-04

TABLE 12-2

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.

Conditions/examples	1	2	3	4	5	6
							f/ImgH	0.92	0.90	0.94	0.96	0.96	0.92
R6/R2	0.68	0.57	0.62	0.58	0.66	0.73
							f345/f12	0.39	0.27	0.37	0.41	0.35	0.41
f5/f3+f6/f4	0.71	0.80	0.73	0.65	0.71	0.62
							SAG61/SAG52	0.88	0.74	0.90	0.52	0.60	0.90
SAG32/SAG21	-0.79	-0.94	-0.83	-0.71	-0.68	-0.68
							ET1/ET6	0.40	0.49	0.54	0.74	0.70	0.40
ET3/DT31+ET4/DT42	0.72	0.93	0.86	0.73	0.69	0.70
							DT12/DT61	0.62	0.62	0.70	0.57	0.61	0.64
R3/R4+R12/R8	0.62	0.82	0.71	0.71	0.75	0.66
							(f1+f2)/(f1-f2)	0.65	0.75	0.73	0.65	0.59	0.73
R10/f-R1/f	0.66	0.76	0.58	0.63	0.61	0.61
							(CT1+CT2)/(CT5+CT6)	0.64	0.63	0.71	0.79	0.89	0.61
(CT3+CT4)/ΣAT	0.73	1.08	0.90	0.68	0.65	0.74

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 those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

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

a first lens having a refractive power, an object side surface of which is concave;

a second lens having an optical power;

a third lens having a positive optical power;

a fourth lens having a negative optical power;

a fifth lens having optical power; and

a sixth lens having optical power;

the maximum field angle FOV of the optical imaging lens satisfies the following conditions: 90 < FOV < 120;

half of the diagonal length ImgH of an effective pixel area on an imaging surface of the optical imaging lens, the total effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy the following conditional expressions:

ImgH＞4.5mm；

f/EPD < 2; and

f/ImgH≥0.9。

2. the optical imaging lens of claim 1, wherein the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R6 of the image-side surface of the third lens satisfy: 0.4 < R6/R2 < 0.9.

3. The optical imaging lens of claim 1, wherein a combined focal length f12 of the first and second lenses and a combined focal length f345 of the third, fourth and fifth lenses satisfy: f345/f12 is more than 0.2 and less than 0.7.

4. The optical imaging lens of claim 1, wherein the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the effective focal length f6 of the sixth lens satisfy: f5/f3+ f6/f4 is more than 0.5 and less than 1.0.

5. The optical imaging lens of claim 1, wherein 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 to 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 the object-side surface of the sixth lens satisfies: 0.5 < SAG61/SAG52 < 1.0.

6. The optical imaging lens of claim 1, wherein a distance SAG21 on the optical axis from an intersection point of an object-side surface of the second lens and the optical axis to an effective radius vertex of an object-side surface of the second lens to a distance SAG32 on the optical axis from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of an image-side surface of the third lens satisfies: -1.0 < SAG32/SAG21 < -0.5.

7. The optical imaging lens of claim 1, wherein the edge thickness ET1 of the first lens and the edge thickness ET6 of the sixth lens satisfy: 0.3 < ET1/ET6 < 0.8.

8. The optical imaging lens of claim 1, wherein the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, the maximum effective radius DT31 of the object-side surface of the third lens, and the maximum effective radius DT42 of the image-side surface of the fourth lens satisfy: 0.5 < ET3/DT31+ ET4/DT42 < 1.0.

9. The optical imaging lens of claim 1, wherein the maximum effective radius DT12 of the image side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0.5 < DT12/DT61 < 1.0.

10. 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 a positive optical power;

a fourth lens having a negative optical power;

a fifth lens having optical power; and

a sixth lens having optical power;

the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies: ImgH > 4.5 mm;

the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD < 2; and

a radius of curvature R2 of an image-side surface of the first lens and a radius of curvature R6 of an image-side surface of the third lens satisfy: 0.4 < R6/R2 < 0.9.