CN113296247B

CN113296247B - Optical imaging lens

Info

Publication number: CN113296247B
Application number: CN202110743518.4A
Authority: CN
Inventors: 周进; 张晓彬; 闻人建科; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-08-02
Anticipated expiration: 2041-07-01
Also published as: CN113296247A

Abstract

The application discloses optical imaging lens includes following preface from object side to image side along optical axis: the first lens with negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface; a second lens having an optical power; a third lens having optical power; a fourth lens having an optical power; a fifth lens with focal power, wherein the image side surface of the fifth lens is convex; and a sixth lens having optical power. The maximum field angle FOV of the optical imaging lens satisfies the following conditions: 100 < FOV < 140. The TV distortion TVD of the optical imaging lens satisfies: the | TVD | is less than 1.1 percent. Half of the length of a diagonal ImgH of an effective pixel area on an imaging surface of the optical imaging lens and a distance TTL from an object side surface of the first lens to the imaging surface along an optical axis satisfy: imgH/TTL is more than 0.3 and less than 1.3.

Description

Optical imaging lens

Technical Field

The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.

Background

With the rapid development of scientific technology in the 21 st century, the development of miniature cameras suitable for portable electronic products such as mobile phones, tablet computers and the like is also in the future, and the requirements of people on the imaging quality of camera lenses are higher and higher. In order to improve competitiveness, electronic product manufacturers often use a plurality of cameras in a matched manner to meet the use requirements of people in different scenes, for example, many mobile phones adopt double-shot, three-shot, even four-shot and five-shot, and the cameras generally comprise long-focus lenses, wide-angle lenses, large image planes and other lenses. The wide-angle lens has the characteristics of large visual angle and long scene depth, can contain more scenes in a picture, and has the function of being difficult to replace when scenes such as wide fields or tall buildings are shot. However, a general wide-angle lens has a large distortion, and may be distorted when a scene such as a human image is captured.

Disclosure of Invention

An aspect of the present disclosure provides an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising: the first lens with negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface; a second lens having an optical power; a third lens having optical power; a fourth lens having an optical power; a fifth lens with focal power, wherein the image side surface of the fifth lens is convex; and a sixth lens having optical power. The maximum field angle FOV of the optical imaging lens may satisfy 100 DEG < FOV < 140 deg. The TV distortion TVD of the optical imaging lens can meet the condition that the TVD is less than 1.1 percent. The half of the diagonal length ImgH of an effective pixel area on an imaging surface of the optical imaging lens and the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis can meet the condition that the ImgH/TTL is more than 0.3 and less than 1.3.

In one embodiment, a central thickness CT6 of the sixth lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis may satisfy: 0.5 < CT6/CT5 < 1.2.

In one embodiment, a center thickness CT1 of the first lens on the optical axis and a separation distance T12 of the first lens and the second lens on the optical axis may satisfy: CT1/T12 is more than or equal to 0.5 and less than 1.5.

In one embodiment, the optical imaging lens further includes a stop, and a distance SD from the stop to an image side surface of the sixth lens along the optical axis and a distance SL from the stop to the imaging surface along the optical axis may satisfy: SD/SL 0.5 & lt, 1.0.

In one embodiment, a combined focal length f3456 of the third lens, the fourth lens, the fifth lens and the sixth lens and an effective focal length f1 of the first lens may satisfy: -1.0 < f3456/f1 < -0.5.

In one embodiment, an on-axis distance SAG41 from an intersection point of an object-side surface of the fourth lens and an optical axis to an effective radius vertex of an object-side surface of the fourth lens, an on-axis distance SAG52 from an intersection point of an image-side surface of the fifth lens and an optical axis to an effective radius vertex of an image-side surface of the fifth lens, an on-axis distance SAG12 from an intersection point of an object-side surface of the first lens and an optical axis to an effective radius vertex of an object-side surface of the first lens, and an on-axis distance SAG11 from an intersection point of an image-side surface of the first lens and an optical axis to an effective radius vertex of an image-side surface of the first lens may satisfy: -1.0 < (SAG41+ SAG52)/(SAG11+ SAG12) < -0.5.

In one embodiment, the maximum effective radius DT31 of the object-side surface of the third lens and the maximum effective radius DT12 of the image-side surface of the first lens may satisfy: 0.3 < DT31/DT12 < 0.8.

In one embodiment, a combined focal length f34 of the third and fourth lenses and a combined focal length f12 of the first and second lenses may satisfy: -1 < f34/f12 < 0.

In one embodiment, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis may satisfy: 0.5 < (ET3+ ET4)/(CT3+ CT4) < 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 R2 of the image-side surface of the first lens, and the radius of curvature R1 of the object-side surface of the first lens may satisfy: 0 < (R3+ R4)/(R2-R1) < 1.0.

In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the radius of curvature R5 of the object-side surface of the third lens, and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 0 < (R11+ R12)/(R5-R6) < 0.5.

In one embodiment, a radius of curvature R8 of the image-side surface of the fourth lens and a radius of curvature R10 of the image-side surface of the fifth lens may satisfy: -1.3 < R8/R10 < -0.3.

In one embodiment, the maximum effective radius DT22 of the image-side surface of the second lens, the maximum effective radius DT32 of the image-side surface of the third lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens may satisfy: 0 < (DT22+ DT32)/(f2-f3) < 1.0.

In one embodiment, the maximum optical distortion dist of the optical imaging lens may satisfy: the | < 2% Dist.

In one embodiment, the second lens has a positive optical power, with a convex object-side surface and a concave image-side surface; the third lens has positive focal power, and the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface.

In one embodiment, the image side surface of the fourth lens is concave; the fifth lens has positive focal power; the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface.

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: the first lens with negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface; a second lens having an optical power; a third lens having optical power; a fourth lens having an optical power; a fifth lens with focal power, wherein the image side surface of the fifth lens is convex; and a sixth lens having optical power. The maximum field angle FOV of the optical imaging lens may satisfy 100 DEG < FOV < 140 deg. The TV distortion TVD of the optical imaging lens can meet the condition that the TVD is less than 1.1 percent. A combined focal length f3456 of the third lens, the fourth lens, the fifth lens, and the sixth lens and an effective focal length f1 of the first lens may satisfy: -1.0 < f3456/f1 < -0.5.

In one embodiment, ImgH, which is half the length of a diagonal line of an effective pixel region on an imaging surface of the optical imaging lens, and TTL, which is a distance from an object side surface of the first lens element to the imaging surface along the optical axis, may satisfy 0.3 < ImgH/TTL < 1.3.

The six-piece type lens framework is adopted, and the lens has the beneficial effects of wide angle, small distortion, good imaging quality and the like through reasonably distributing the focal power of each lens and optimally selecting the surface type and the thickness of each lens.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

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

fig. 2A to 2E show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, a chromatic aberration of magnification curve, and TV distortion, 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 4E show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, a chromatic aberration of magnification curve, and TV distortion, 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 6E show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, a chromatic aberration of magnification curve, and TV distortion, 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 8E show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, a chromatic aberration of magnification curve, and TV distortion, respectively, of an 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 10E show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, a chromatic aberration of magnification curve, and TV distortion, 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 12E show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, a chromatic aberration of magnification curve, and TV distortion, respectively, of the optical imaging lens of embodiment 6.

Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application; and

fig. 14A to 14E show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, a chromatic aberration of magnification curve, and TV distortion, respectively, of the optical imaging lens of embodiment 7.

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 only used 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. In this document, the surface of each lens closest to the subject is referred to as the object-side surface of the lens, and the surface of each lens closest to the image plane is referred to as 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.

The optical imaging lens according to an exemplary embodiment of the present application may include, for example, six lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in order from the object side to the image side along the optical axis.

In an exemplary embodiment, the first lens may have a negative power; the second lens may have a positive or negative optical power; the third lens may have a positive optical power or a negative optical power; the fourth lens may have a positive power or a negative power; the fifth lens may have a positive power or a negative power; the sixth lens may have a positive power or a negative power.

In an exemplary embodiment, the object side surface of the first lens may be concave and the image side surface may be concave. The image-side surface of the fifth lens element may be convex. The focal power and the surface type of each lens are reasonably configured, so that the inclination angle of incident light can be reduced, the large field of view of an object space can be effectively shared, and a larger field angle range can be obtained; moreover, the incident angle of the light can be reasonably adjusted, the light sensing chip is matched better, and better imaging quality is obtained.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 100 ° < FOV < 140 °, where FOV is a maximum angle of view of the optical imaging lens. By controlling the maximum field angle of the optical imaging lens in the range, the advantage of the wide-angle lens can be increased, so that the wide-angle lens has a wider imaging range. More specifically, the FOV may satisfy 110 ° < FOV < 130 °.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression | TVD | < 1.1%, where TVD is TV distortion of the optical imaging lens. By controlling the TV distortion of the optical imaging lens to satisfy that the TVD is less than 1.1 percent, the method can obtain a larger imaging range and simultaneously reduce exaggerated deformation and distortion of pictures, so that the imaging is more in line with the original outline proportion of scenes.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3 < ImgH/TTL < 1.3, where ImgH is a half of a diagonal length of an effective pixel area on an imaging surface of the optical imaging lens, and TTL is a distance along an optical axis from an object side surface of the first lens to the imaging surface of the optical imaging lens. By controlling the ratio of the length of the diagonal line of the effective pixel area on the imaging surface of the optical imaging lens to the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis within the range, the overall size of the lens can be effectively shortened to match various increasingly thinner electronic devices, the limitation of the application of the lens due to overlarge size is avoided, and meanwhile, the lens can have a larger imaging area and better imaging quality. More specifically, ImgH and TTL can satisfy 0.5 < ImgH/TTL < 0.7.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < CT6/CT5 < 1.2, where CT6 is a central thickness of the sixth lens on the optical axis, and CT5 is a central thickness of the fifth lens on the optical axis. By controlling the ratio of the center thickness of the sixth lens element on the optical axis to the center thickness of the fifth lens element on the optical axis within this range, it is possible to contribute to improving manufacturability in the aspects of fifth and sixth lens element molding, lens assembly, and the like, and also contribute to ensuring miniaturization of the lens barrel. More specifically, CT6 and CT5 may satisfy 0.6 < CT6/CT5 < 1.1.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 ≦ CT1/T12 < 1.5, where CT1 is a center thickness of the first lens on the optical axis, and T12 is a separation distance of the first lens and the second lens on the optical axis. The ratio of the central thickness of the first lens on the optical axis to the distance between the first lens and the second lens on the optical axis is controlled within the range, so that the space occupation ratio of the first lens can be controlled, the assembly process of the lens is favorably ensured, and the miniaturization of the optical lens is favorably realized. More specifically, CT1 and T12 can satisfy 0.5 ≦ CT1/T12 < 1.3.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < SD/SL < 1.0, where SD is a distance along an optical axis from a stop of the optical imaging lens to an image side surface of the sixth lens, and SL is a distance along the optical axis from the stop of the optical imaging lens to an imaging surface of the optical imaging lens. The ratio of the distance from the diaphragm of the optical imaging lens to the image side surface of the sixth lens along the optical axis to the distance from the diaphragm of the optical imaging lens to the image side surface of the optical imaging lens along the optical axis is controlled within the range, so that the overall structure of the lens is more reasonable, and the lens is more stable in assembly and use. More specifically, SD and SL may satisfy 0.6 < SD/SL < 0.8.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.0 < f3456/f1 < -0.5, where f3456 is a combined focal length of the third, fourth, fifth, and sixth lenses, and f1 is an effective focal length of the first lens. By controlling the ratio of the combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens to the effective focal length of the first lens within the range, off-axis aberration of the optical system can be corrected, and imaging quality is improved. More specifically, f3456 and f1 may satisfy-0.8 < f3456/f1 < -0.6.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.0 < (SAG41+ SAG52)/(SAG11+ SAG12) < -0.5, where SAG41 is an on-axis distance from an intersection of an object-side surface of the fourth lens and an optical axis to an effective radius vertex of the object-side surface of the fourth lens, SAG52 is an on-axis distance from an intersection 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, SAG11 is an on-axis distance from an intersection of an object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens, and SAG12 is an on-axis distance from an intersection of the image-side surface of the first lens and the optical axis to an effective radius vertex of the image-side surface of the first lens. The ratio of the sum of the axial distance from the intersection point of the object side surface of the fourth lens and the optical axis to the effective radius peak of the object side surface of the fourth lens, the axial distance from the intersection point of the image side surface of the fifth lens and the optical axis to the effective radius peak of the image side surface of the fifth lens to the axial distance from the intersection point of the object side surface of the first lens and the optical axis to the effective radius peak of the object side surface of the first lens and the sum of the axial distance from the intersection point of the image side surface of the first lens and the optical axis to the effective radius peak of the image side surface of the first lens is controlled within the range, so that the first lens, the fourth lens and the fifth lens are prevented from being excessively bent, the lens is favorable for molding and assembling, and the use reliability of the lens is improved. More specifically, SAG41, SAG52, SAG11 and SAG12 may satisfy-0.9 < (SAG41+ SAG52)/(SAG11+ SAG12) < -0.5.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3 < DT31/DT12 < 0.8, where DT31 is the maximum effective radius of the object-side surface of the third lens, and DT12 is the maximum effective radius of the image-side surface of the first lens. The ratio of the maximum effective radius of the object side surface of the third lens to the maximum effective radius of the image side surface of the first lens is controlled within the range, so that the size distribution of the lens is more reasonable, the arrangement of the whole structure of the lens is facilitated, and the stability of the lens is improved. More specifically, DT31 and DT12 may satisfy 0.4 < DT31/DT12 < 0.7.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1 < f34/f12 < 0, where f34 is a combined focal length of the third lens and the fourth lens, and f12 is a combined focal length of the first lens and the second lens. By controlling the ratio of the combined focal length of the third lens and the fourth lens to the combined focal length of the first lens and the second lens within the range, the system focal power can be reasonably distributed, and the spherical aberration contributions of the first lens to the fourth lens are controlled within the reasonable range, so that the on-axis field of view can obtain good imaging quality. More specifically, f34 and f12 may satisfy-1 < f34/f12 < -0.3.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < (ET3+ ET4)/(CT3+ CT4) < 1.0, where ET3 is an edge thickness of the third lens, ET4 is an edge thickness of the fourth lens, CT3 is a center thickness of the third lens on an optical axis, and CT4 is a center thickness of the fourth lens on the optical axis. By controlling the ratio of the sum of the edge thickness of the third lens and the edge thickness of the fourth lens to the sum of the center thickness of the third lens on the optical axis and the center thickness of the fourth lens on the optical axis to be in the range, the structures of the third lens and the fourth lens can be more uniform, the injection molding can be more easily carried out, the processability and the assembly yield of an imaging system can be improved, and meanwhile, the better imaging quality is ensured. More specifically, ET3, ET4, CT3, and CT4 may satisfy 0.8 < (ET3+ ET4)/(CT3+ CT4) < 1.0.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < (R3+ R4)/(R2-R1) < 1.0, where 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, R2 is a radius of curvature of an image-side surface of the first lens, and R1 is a radius of curvature of an object-side surface of the first lens. By controlling the ratio of the sum of the curvature radius of the object side surface of the second lens and the curvature radius of the image side surface of the second lens to the difference of the curvature radius of the image side surface of the first lens and the curvature radius of the object side surface of the first lens to the curvature radius of the image side surface of the first lens to the curvature radius of the object side surface of the first lens to be in the range, the curvatures of the object side surfaces and the curvature side surfaces of the first lens and the second lens can be controlled, the field curvature contribution of the first lens and the second lens is in a reasonable range, the optical sensitivity of the first lens and the second lens is favorably reduced, the assembly yield of a system is favorably improved, and the reflection ghost of the first lens and the second lens is favorably reduced. More specifically, R3, R4, R2 and R1 may satisfy 0.5 < (R3+ R4)/(R2-R1) < 0.9.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < (R11+ R12)/(R5-R6) < 0.5, where R11 is a radius of curvature of an object-side surface of the sixth lens, R12 is a radius of curvature of an image-side surface of the sixth lens, R5 is a radius of curvature of an object-side surface of the third lens, and R6 is a radius of curvature of an image-side surface of the third lens. By controlling the ratio of the sum of the curvature radius of the object side surface of the sixth lens and the curvature radius of the image side surface of the sixth lens to the difference of the curvature radius of the object side surface of the third lens and the curvature radius of the image side surface of the third lens to be within the range, the matching of a lens Chief Ray Angle (CRA) can be ensured, the astigmatism and the field curvature of the lens can be effectively corrected, the injection molding of the lens is facilitated, and the appearance problem of the lens is avoided. More specifically, R11, R12, R5 and R6 may satisfy 0.2 < (R11+ R12)/(R5-R6) < 0.4.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.3 < R8/R10 < -0.3, where R8 is a radius of curvature of an image-side surface of the fourth lens and R10 is a radius of curvature of an image-side surface of the fifth lens. The ratio of the curvature radius of the image side surface of the fourth lens to the curvature radius of the image side surface of the fifth lens is controlled within the range, so that the axial chromatic aberration can be reduced, the better imaging quality is ensured, and meanwhile, the ghost generated by reflection of part of the fourth lens and the fifth lens can be weakened and avoided. More specifically, R8 and R10 may satisfy-1.1 < R8/R10 < -0.5.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < (DT22+ DT32)/(f2-f3) < 1.0, where DT22 is the maximum effective radius of the image-side surface of the second lens, DT32 is the maximum effective radius of the image-side surface of the third lens, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens. By controlling the ratio of the sum of the maximum effective radius of the image side surface of the second lens and the maximum effective radius of the image side surface of the third lens to the difference between the effective focal length of the second lens and the effective focal length of the third lens to be within the range, the contribution amounts of spherical aberration and astigmatism of the second lens and the third lens can be favorably controlled, and the imaging quality of the system can be favorably improved. More specifically, DT22, DT32, f2 and f3 may satisfy 0.3 < (DT22+ DT32)/(f2-f3) < 0.8.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy a conditional expression | Dist | < 2%, where Dist is a maximum optical distortion of the optical imaging lens, and satisfy | Dist | < 2% by controlling the maximum optical distortion of the optical imaging lens, so that problems of scene distortion, picture distortion, and the like of the wide-angle lens due to an excessively large viewing angle may be effectively avoided, and the practicality of the wide-angle lens may be improved. More specifically, | Dist | < 1.5% can be satisfied.

In an exemplary embodiment, the second lens may have a positive optical power, and the object side surface may be convex and the image side surface may be concave. The arrangement of the focal power and the surface type of the second lens is combined with the first lens, so that the off-axis aberration of the optical system can be corrected on the premise of obtaining a large field angle, and the imaging quality is improved. The third lens element can have a positive optical power, and can have a convex object-side surface and a convex image-side surface. The third lens is provided with positive focal power, the object side surface is a convex surface, astigmatism generated by the first lenses can be favorably reduced, and the image side surface of the third lens is a convex surface, so that chromatic aberration correction is favorably realized, and the incident angle of light rays is favorably matched with a chip.

In an exemplary embodiment, the image-side surface of the fourth lens may be a concave surface, which is beneficial to reducing the inclination angle of incident light, so that the large field of view of the object space is effectively shared, and a larger field angle range is beneficial to obtaining. The fifth lens can have positive focal power, and the combination of the fifth lens with positive focal power and the first lens with negative focal power helps balance the low-order aberration of the control system and obtain higher imaging quality. The object side surface of the sixth lens can be a convex surface, the image side surface of the sixth lens can be a concave surface, and the surface shape of the sixth lens is beneficial to shortening the total length of the system and realizing the miniaturization of the module.

In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The diaphragm may be disposed at an appropriate position as needed, for example, 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 a photosensitive element on the imaging surface.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the axial distance between each lens and the like, the lens has the characteristics of wide angle, small distortion, miniaturization, lightness, thinness, good imaging quality and the like.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, 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 in imaging can be eliminated as much as possible, and the imaging quality is further improved. 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 2E. 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 along an optical axis, a first lens element E1, a second lens element E2: stop STO, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has 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 convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

Table 1 shows basic parameters of the optical imaging lens of embodiment 1, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).

TABLE 1

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. Tables 2-1 and 2-2 below show the aspherical mirror surfaces S that can be used in example 1High-order coefficient A of 1 to S12 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ And A ₂₈ 。

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

2.6623E-01

-2.7625E-01

2.8353E-01

-2.3336E-01

1.3562E-01

-4.6146E-02

1.8611E-03

S2

3.2149E-01

-4.2088E-01

9.8591E-01

-2.4340E+00

4.6311E+00

-6.2097E+00

5.6959E+00

S3

1.6734E-02

-2.4974E-01

1.3532E+00

-7.0799E+00

2.6168E+01

-6.8694E+01

1.2868E+02

S4

8.4888E-03

6.9945E-02

-1.8469E+00

1.7119E+01

-1.0413E+02

4.4308E+02

-1.3395E+03

S5

-8.1906E-03

8.8910E-01

-1.6721E+01

1.9213E+02

-1.4514E+03

7.4855E+03

-2.6930E+04

S6

-1.0551E-01

8.0954E-02

-5.2817E-01

3.2063E+00

-1.4825E+01

3.9459E+01

-3.3120E+01

S7

-5.0092E-01

2.3978E+00

-2.0547E+01

1.2941E+02

-5.8286E+02

1.8843E+03

-4.3841E+03

S8

-5.9691E-01

2.1675E+00

-8.0679E+00

2.3157E+01

-5.0312E+01

8.3253E+01

-1.0464E+02

S9

-4.1096E-01

1.3891E+00

-3.1402E+00

4.6133E+00

-3.7937E+00

2.2125E-01

3.5611E+00

S10

-3.9290E-01

7.6285E-01

-1.1295E+00

1.4292E+00

-1.4586E+00

1.1693E+00

-7.1045E-01

S11

-2.2369E-01

1.3835E-01

-4.6685E-02

-3.1415E-03

1.1200E-02

-5.5568E-03

1.5197E-03

S12

-3.5838E-01

2.4040E-01

-1.2919E-01

5.1434E-02

-1.4977E-02

3.1760E-03

-4.8708E-04

TABLE 2-1

Flour mark

A18

A20

A22

A24

A26

A28

S1

6.7046E-03

-3.6407E-03

1.0058E-03

-1.6265E-04

1.4639E-05

-5.6884E-07

S2

-3.4694E+00

1.3113E+00

-2.5135E-01

-2.1586E-03

1.0033E-02

-1.2945E-03

S3

-1.7167E+02

1.6127E+02

-1.0389E+02

4.3556E+01

-1.0684E+01

1.1615E+00

S4

2.8840E+03

-4.3818E+03

4.5829E+03

-3.1354E+03

1.2614E+03

-2.2596E+02

S5

6.8131E+04

-1.2058E+05

1.4604E+05

-1.1522E+05

5.3327E+04

-1.0978E+04

S6

-1.2760E+02

4.9043E+02

-8.0025E+02

7.2256E+02

-3.5178E+02

7.2341E+01

S7

7.3245E+03

-8.6861E+03

7.1226E+03

-3.8345E+03

1.2180E+03

-1.7282E+02

S8

9.8734E+01

-6.8436E+01

3.3642E+01

-1.1059E+01

2.1738E+00

-1.9274E-01

S9

-4.7350E+00

3.3661E+00

-1.4924E+00

4.1303E-01

-6.5555E-02

4.5667E-03

S10

3.1308E-01

-9.5492E-02

1.8956E-02

-2.1942E-03

1.1215E-04

0.0000E+00

S11

-2.6205E-04

2.9181E-05

-2.0411E-06

8.1695E-08

-1.4288E-09

0.0000E+00

S12

5.3217E-05

-4.0257E-06

1.9990E-07

-5.8501E-09

7.6354E-1

0.0000E+00

Tables 2 to 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the convergent focus deviation 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. Fig. 2E shows TV distortion of embodiment 1, which represents the degree of distortion (or degree of deformation) of the image of the object made by the optical lens with respect to the object itself. As can be seen from fig. 2A to 2E, 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 4E. 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, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, an aperture stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

Table 3 shows basic parameters of the optical imaging lens of embodiment 2, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 4-1 and 4-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 through S12 in example 2 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ And A ₂₈ Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 3

TABLE 4-1

Flour mark

A18

A20

A22

A24

A26

A28

S1

-4.0130E-04

5.9234E-05

-6.1764E-06

4.3059E-07

-1.7997E-08

3.4094E-10

S2

-6.6145E-03

1.8984E-03

-3.8204E-04

4.6190E-05

-2.4667E-06

0.0000E+00

S3

4.5726E+00

-5.4129E+00

3.6951E+00

-1.5091E+00

3.4391E-01

-3.3774E-02

S4

-8.1406E+02

9.3361E+02

-7.4038E+02

3.8614E+02

-1.1914E+02

1.6475E+01

S5

-2.2992E+04

4.4297E+04

-5.8043E+04

4.9316E+04

-2.4488E+04

5.3927E+03

S6

-2.4377E+03

3.3102E+03

-3.0486E+03

1.8186E+03

-6.3402E+02

9.8072E+01

S7

7.6312E+02

-7.6016E+02

5.2849E+02

-2.4335E+02

6.6680E+01

-8.2295E+00

S8

2.6405E+01

-1.5290E+01

6.1965E+00

-1.6654E+00

2.6641E-01

-1.9189E-02

S9

8.5608E-01

-3.1381E-01

7.9153E-02

-1.2954E-02

1.2257E-03

-5.0134E-05

S10

8.4596E-02

-2.0269E-02

3.1277E-03

-2.7985E-04

1.1055E-05

0.0000E+00

S11

-1.1975E-04

1.1893E-05

-7.2864E-07

2.4769E-08

-3.4929E-10

0.0000E+00

S12

3.1209E-05

-2.3012E-06

1.1179E-07

-3.2104E-09

4.1215E-11

0.0000E+00

TABLE 4-2

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the convergent focus deviation 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. Fig. 4E shows TV distortion of embodiment 2, which represents the degree of distortion (or degree of deformation) of the image of the object made by the optical lens with respect to the object itself. As can be seen from fig. 4A to 4E, 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 6E. 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, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, an aperture stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex 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 positive 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 optical imaging lens has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

Table 5 shows basic parameters of the optical imaging lens of embodiment 3, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 6-1 and 6-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 3 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ And A ₂₈ Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

1.4724E-01

-9.9099E-02

6.3398E-02

-3.2559E-02

1.2843E-02

-3.8113E-03

8.4183E-04

S2

1.4103E-01

-6.9308E-02

-9.1202E-02

3.8154E-01

-6.6184E-01

7.1562E-01

-5.1754E-01

S3

-1.0498E-02

-4.9539E-02

1.3649E-01

-3.4929E-01

6.2530E-01

-7.8038E-01

6.9040E-01

S4

2.6265E-02

-5.6226E-01

9.0146E+00

-8.9695E+01

5.9679E+02

-2.7488E+03

8.9464E+03

S5

-3.1879E-03

6.2795E-01

-1.3942E+01

1.7803E+02

-1.4467E+03

7.8690E+03

-2.9459E+04

S6

-2.1460E-01

2.3368E-01

1.3047E+00

-2.2287E+01

1.5003E+02

-6.1126E+02

1.6590E+03

S7

-3.6096E-01

1.3857E+00

-1.2111E+01

6.7019E+01

-2.5428E+02

6.8071E+02

-1.3005E+03

S8

-1.3432E-01

2.9608E-01

-1.9405E+00

6.8764E+00

-1.6269E+01

2.7791E+01

-3.4726E+01

S9

-1.4165E-01

3.6843E-01

-4.3413E-01

2.9408E-02

9.1080E-01

-1.8311E+00

2.0410E+00

S10

-3.3159E-01

6.6256E-01

-1.1319E+00

1.6195E+00

-1.7524E+00

1.3792E+00

-7.6803E-01

S11

-2.4077E-01

1.6518E-01

-1.0792E-01

6.7055E-02

-3.5602E-02

1.4477E-02

-4.2222E-03

S12

-3.2083E-01

1.9998E-01

-1.0469E-01

4.2257E-02

-1.2761E-02

2.8377E-03

-4.5869E-04

TABLE 6-1

TABLE 6-2

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the convergent focus deviation 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. Fig. 6E shows TV distortion of embodiment 3, which represents the degree of distortion (or degree of deformation) of the image of the object made by the optical lens with respect to the object itself. As can be seen from fig. 6A to 6E, 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 8E. 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, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, an aperture stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

Table 7 shows basic parameters of the optical imaging lens of embodiment 4, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 4 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ And A ₂₈ Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

1.5925E-01

-1.0854E-01

7.3016E-02

-4.1274E-02

1.8369E-02

-6.2257E-03

1.5788E-03

S2

2.0850E-01

-1.1906E-01

9.8736E-02

-1.3423E-01

1.8067E-01

-1.7091E-01

1.0310E-01

S3

2.3884E-02

3.3860E-02

-9.4179E-01

5.3091E+00

-1.8190E+01

4.0328E+01

-6.0775E+01

S4

3.5204E-02

-1.6788E-01

1.7950E+00

-1.2550E+01

5.4605E+01

-1.6213E+02

3.3950E+02

S5

4.0847E-02

-8.6869E-01

1.4211E+01

-1.3876E+02

8.7566E+02

-3.7353E+03

1.1037E+04

S6

-3.6527E-02

-1.3208E+00

1.3474E+01

-8.3178E+01

3.4124E+02

-9.6902E+02

1.9456E+03

S7

-5.1544E-01

4.8207E-01

1.0437E+00

-1.3260E+01

5.7686E+01

-1.5189E+02

2.6916E+02

S8

-5.3518E-01

1.3164E+00

-3.4457E+00

7.0166E+00

-1.0459E+01

1.1510E+01

-9.4303E+00

S9

-1.3496E-01

4.2104E-01

-8.9991E-01

1.3126E+00

-1.3401E+00

9.8106E-01

-5.2172E-01

S10

-4.0926E-01

7.9051E-01

-1.0535E+00

1.0532E+00

-7.7831E-01

4.2516E-01

-1.7027E-01

S11

-1.0672E-01

8.6079E-02

-6.0532E-02

2.8950E-02

-9.2567E-03

2.0190E-03

-3.0449E-04

S12

-2.5273E-01

1.2646E-01

-5.2365E-02

1.5546E-02

-3.1021E-03

3.8904E-04

-2.5093E-05

TABLE 8-1

Flour mark

A18

A20

A22

A24

A26

A28

S1

-2.9542E-04

4.0054E-05

-3.8175E-06

2.4219E-07

-9.1738E-09

1.5686E-10

S2

-4.0148E-02

1.0291E-02

-1.7377E-03

1.8764E-04

-1.1876E-05

3.3969E-07

S3

6.3451E+01

-4.5734E+01

2.2258E+01

-6.9654E+00

1.2628E+00

-1.0062E-01

S4

-5.0637E+02

5.3511E+02

-3.9127E+02

1.8802E+02

-5.3331E+01

6.7558E+00

S5

-2.2815E+04

3.2856E+04

-3.2267E+04

2.0587E+04

-7.6876E+03

1.2746E+03

S6

-2.7823E+03

2.8162E+03

-1.9710E+03

9.0701E+02

-2.4683E+02

3.0088E+01

S7

-3.3196E+02

2.8556E+02

-1.6765E+02

6.3785E+01

-1.4096E+01

1.3631E+00

S8

5.7417E+00

-2.5614E+00

8.1304E-01

-1.7397E-01

2.2523E-02

-1.3353E-03

S9

2.0133E-01

-5.5596E-02

1.0670E-02

-1.3481E-03

1.0065E-04

-3.3600E-06

S10

4.8910E-02

-9.7217E-03

1.2616E-03

-9.5750E-05

3.2153E-06

0.0000E+00

S11

3.1710E-05

-2.2311E-06

1.0060E-07

-2.5961E-09

2.8635E-11

0.0000E+00

S12

-2.6249E-07

1.9276E-07

-1.5836E-08

5.9090E-10

-8.7940E-12

0.0000E+00

TABLE 8-2

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the convergent focus deviation 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. Fig. 8E shows TV distortion of embodiment 4, which represents the degree of distortion (or degree of deformation) of the image of the object made by the optical lens with respect to the object itself. As can be seen from fig. 8A to 8E, 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 10E. 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, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, an aperture stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

Table 9 shows basic parameters of the optical imaging lens of embodiment 5, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 10-1 and 10-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 5 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ And A ₂₈ Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 9

TABLE 10-1

Flour mark

A18

A20

A22

A24

A26

A28

S1

-3.0782E-04

4.1562E-05

-3.9423E-06

2.4858E-07

-9.3408E-09

1.5810E-10

S2

9.1509E-02

-2.5961E-02

4.8156E-03

-5.5520E-04

3.5586E-05

-9.4506E-07

S3

-9.3482E+01

8.6649E+01

-5.3900E+01

2.1472E+01

-4.9431E+00

4.9967E-01

S4

-1.2954E+03

1.8233E+03

-1.7997E+03

1.1736E+03

-4.5309E+02

7.8385E+01

S5

1.4182E+04

-2.5849E+04

3.1478E+04

-2.4467E+04

1.0942E+04

-2.1331E+03

S6

-2.0303E+03

2.4052E+03

-1.9438E+03

1.0219E+03

-3.1481E+02

4.3104E+01

S7

-1.0859E+03

1.3041E+03

-1.0370E+03

5.2676E+02

-1.5491E+02

2.0068E+01

S8

3.6061E+01

-1.9167E+01

7.1033E+00

-1.7413E+00

2.5364E-01

-1.6619E-02

S9

4.3206E-01

-1.3846E-01

3.0785E-02

-4.4967E-03

3.8738E-04

-1.4900E-05

S10

9.5571E-02

-2.0595E-02

2.8804E-03

-2.3468E-04

8.4348E-06

0.0000E+00

S11

3.2300E-07

-5.2367E-08

3.9109E-09

-1.4638E-10

2.1875E-12

0.0000E+00

S12

-3.3700E-06

2.7495E-07

-1.3559E-08

3.7347E-10

-4.4133E-12

0.0000E+00

TABLE 10-2

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the convergent focus deviation 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. Fig. 10E shows TV distortion of example 5, which represents the degree of distortion (or degree of deformation) of the image of the object made by the optical lens with respect to the object itself. As can be seen from fig. 10A to 10E, 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 12E. 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, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, an aperture stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has 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 positive 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 optical imaging lens has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

Table 11 shows basic parameters of the optical imaging lens of embodiment 6, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 12-1 and 12-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 6 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ And A ₂₈ Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

2.9199E-01

-3.0516E-01

2.9725E-01

-2.3235E-01

1.4011E-01

-6.4070E-02

2.2031E-02

S2

3.0368E-01

-2.3031E-01

-5.0687E-02

7.0486E-01

-1.5110E+00

1.8903E+00

-1.5774E+00

S3

3.6368E-02

-3.3522E-01

1.8511E+00

-1.1222E+01

4.4476E+01

-1.2162E+02

2.3231E+02

S4

4.8181E-02

-4.9009E-01

5.4007E+00

-4.8098E+01

2.8782E+02

-1.1981E+03

3.5249E+03

S5

2.6008E-02

1.0460E-01

-1.2421E+00

-5.8670E+00

2.9453E+02

-3.4848E+03

2.2881E+04

S6

-1.1781E-01

-4.3236E-01

1.0420E+01

-1.2425E+02

9.5052E+02

-4.9615E+03

1.8124E+04

S7

-6.9107E-01

2.9728E+00

-2.8560E+01

2.0251E+02

-1.0121E+03

3.6066E+03

-9.2340E+03

S8

-6.2456E-01

2.4903E+00

-1.3290E+01

5.5564E+01

-1.6772E+02

3.6555E+02

-5.7752E+02

S9

-2.4926E-01

1.2200E+00

-4.1189E+00

1.0275E+01

-1.8523E+01

2.4076E+01

-2.2651E+01

S10

-5.8195E-01

1.4672E+00

-2.7308E+00

3.8750E+00

-3.9849E+00

2.9814E+00

-1.6323E+00

S11

-2.0268E-01

1.1575E-01

-6.2299E-02

3.3380E-02

-1.5563E-02

5.5074E-03

-1.3909E-03

S12

-4.4752E-01

2.9579E-01

-1.6199E-01

6.8093E-02

-2.1364E-02

4.9352E-03

-8.3060E-04

TABLE 12-1

TABLE 12-2

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the convergent focus deviation 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. Fig. 12E shows TV distortion of example 6, which represents the degree of distortion (or degree of deformation) of the image of the object made by the optical lens with respect to the object itself. As can be seen from fig. 12A to 12E, the optical imaging lens according to embodiment 6 can achieve good imaging quality.

Example 7

An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14E. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a second lens E2, an aperture stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive 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 optical imaging lens has an imaging surface S15, and light from an object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.

Table 13 shows basic parameters of the optical imaging lens of embodiment 7, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 14-1 and 14-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 7 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ And A ₂₈ Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

3.0596E-01

-3.4378E-01

3.7308E-01

-3.3713E-01

2.4176E-01

-1.3414E-01

5.6627E-02

S2

3.3877E-01

-3.9200E-01

7.1968E-01

-1.8436E+00

4.2509E+00

-7.1121E+00

8.2800E+00

S3

2.9849E-03

-1.6575E-02

-7.5474E-01

5.1679E+00

-2.1957E+01

6.1712E+01

-1.1916E+02

S4

1.2110E-02

1.8067E-01

-3.7164E+00

3.7119E+01

-2.4376E+02

1.0929E+03

-3.4155E+03

S5

1.2811E-02

1.4573E-01

-2.8551E+00

3.2413E+01

-2.4096E+02

1.2172E+03

-4.2688E+03

S6

-1.0854E-01

-1.7834E-02

1.0634E+00

-9.8019E+00

5.3509E+01

-1.9674E+02

5.0722E+02

S7

-5.0626E-01

1.4789E+00

-7.8810E+00

2.9362E+01

-6.8471E+01

7.9284E+01

3.8900E+01

S8

-5.5156E-01

1.9319E+00

-7.7855E+00

2.4764E+01

-5.8251E+01

1.0062E+02

-1.2750E+02

S9

-2.7284E-01

8.6594E-01

-2.1868E+00

4.3269E+00

-6.4329E+00

7.0867E+00

-5.7641E+00

S10

-4.0957E-01

8.3737E-01

-1.4235E+00

1.9598E+00

-2.0220E+00

1.5277E+00

-8.2985E-01

S11

-1.9312E-01

6.1795E-02

2.4003E-02

-3.8908E-02

2.1741E-02

-7.1467E-03

1.5165E-03

S12

-3.9927E-01

2.5725E-01

-1.3459E-01

5.3643E-02

-1.5969E-02

3.5037E-03

-5.5870E-04

TABLE 14-1

Flour mark

A18

A20

A22

A24

A26

A28

S1

-1.7876E-02

4.1232E-03

-6.7096E-04

7.2630E-05

-4.6738E-06

1.3469E-07

S2

-6.7008E+00

3.7532E+00

-1.4268E+00

3.5157E-01

-5.0697E-02

3.2519E-03

S3

1.6050E+02

-1.5029E+02

9.5866E+01

-3.9749E+01

9.6692E+00

-1.0484E+00

S4

7.5000E+03

-1.1510E+04

1.2077E+04

-8.2505E+03

3.3052E+03

-5.8885E+02

S5

1.0479E+04

-1.7918E+04

2.0880E+04

-1.5792E+04

6.9828E+03

-1.3691E+03

S6

-9.2916E+02

1.2043E+03

-1.0796E+03

6.3644E+02

-2.2177E+02

3.4570E+01

S7

-3.1108E+02

5.5514E+02

-5.4767E+02

3.2205E+02

-1.0597E+02

1.5072E+01

S8

1.1792E+02

-7.8506E+01

3.6573E+01

-1.1300E+01

2.0782E+00

-1.7207E-01

S9

3.4428E+00

-1.4905E+00

4.5539E-01

-9.3257E-02

1.1510E-02

-6.4876E-04

S10

3.1742E-01

-8.2992E-02

1.4082E-02

-1.3957E-03

6.1290E-05

0.0000E+00

S11

-2.1227E-04

1.9359E-05

-1.0962E-06

3.4440E-08

-4.4511E-10

0.0000E+00

S12

6.3516E-05

-4.9922E-06

2.5694E-07

-7.7733E-09

1.0461E-10

0.0000E+00

TABLE 14-2

Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the lens. Fig. 14E shows TV distortion of example 7, which represents the degree of distortion (or degree of deformation) of the image of the object made by the optical lens with respect to the object itself. As can be seen from fig. 14A to 14E, the optical imaging lens according to embodiment 7 can achieve good imaging quality.

Further, in embodiments 1 to 7, the focal length values f1 to f6 of the respective lenses, the effective focal length f of the optical imaging lens, the distance TTL along the optical axis from the object side surface of the first lens of the optical imaging lens to the imaging surface of the optical imaging lens, half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, the ratio f/EPD of the effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens, the maximum field angle FOV of the optical imaging lens, the TV distortion TV dist of the optical imaging lens, and the maximum optical distortion dist of the optical imaging lens are as shown in table 15.

Parameters/embodiments	1	2	3	4	5	6	7
								f1(mm)	-4.22	-4.38	-3.29	-3.83	-3.49	-3.62	-4.10
f2(mm)	7.48	8.69	6.09	6.38	7.55	5.60	8.22
								f3(mm)	3.20	3.02	3.25	3.60	2.73	2.83	2.99
f4(mm)	-4.03	-4.79	341.16	-5.17	-3.42	-4.73	-4.63
								f5(mm)	4.48	5.04	14.60	5.85	5.62	7.35	5.04
f6(mm)	15.80	-255.05	76.01	6.73	5.51	8.73	20.11
								f(mm)	2.62	2.62	2.54	2.19	1.98	2.29	2.57
TTL(mm)	6.58	7.38	7.43	7.05	7.19	5.99	6.66
								ImgH(mm)	4.00	4.00	4.00	4.00	4.00	4.00	4.00
f/EPD	2.26	2.38	2.30	1.80	2.31	2.35	2.29
								FOV(°)	114.1	114.0	115.4	122.5	127.4	120.4	114.6
TV Dist.(％)	-1.04	-1.02	-0.64	-0.31	-0.27	-0.24	-0.15
								Dist.(％)	-1.38	-1.06	-0.87	-0.35	-0.27	-0.22	-0.19

Watch 15

The conditional expressions in examples 1 to 7 satisfy the conditions shown in table 16, respectively.

Conditions/examples	1	2	3	4	5	6	7
								ImgH/TTL	0.61	0.54	0.54	0.57	0.56	0.67	0.60
CT6/CT5	1.01	0.83	1.09	0.65	0.76	0.74	0.71
								CT1/T12	0.63	0.80	1.26	0.82	0.57	0.54	0.50
SD/SL	0.72	0.74	0.73	0.69	0.70	0.68	0.72
								f3456/f1	-0.61	-0.61	-0.71	-0.66	-0.67	-0.69	-0.61
(SAG41+SAG52)/(SAG11+SAG12)	-0.73	-0.74	-0.52	-0.57	-0.53	-0.66	-0.87
								DT31/DT12	0.58	0.45	0.44	0.48	0.41	0.42	0.60
f34/f12	-0.77	-0.53	-0.44	-0.57	-0.98	-0.35	-0.62
								(ET3+ET4)/(CT3+CT4)	0.87	0.92	0.83	0.86	0.86	0.91	0.88
(R3+R4)/(R2-R1)	0.67	0.54	0.74	0.87	0.83	0.63	0.61
								(R11+R12)/(R5-R6)	0.31	0.35	0.34	0.23	0.29	0.27	0.30
R8/R10	-0.97	-0.87	-1.01	-0.58	-0.59	-0.97	-0.78
								(DT22+DT32)/(f2-f3)	0.44	0.36	0.66	0.78	0.42	0.63	0.37

TABLE 16

The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (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 protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. 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:

the first lens with negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface;

a second lens having a positive optical power;

a third lens having a positive optical power;

a fourth lens having an optical power;

the image side surface of the fifth lens is a convex surface; and

a sixth lens having an optical power,

the optical imaging lens satisfies:

100°＜FOV＜140°；

the | TVD | is less than 1.1 percent; and

-1.0＜f3456/f1＜-0.5，

wherein FOV is a maximum field angle of the optical imaging lens, TVD is a TV distortion of the optical imaging lens, f3456 is a combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens, f1 is an effective focal length of the first lens,

wherein the number of lenses having power in the optical imaging lens is six.

2. The optical imaging lens of claim 1, wherein a central thickness CT6 of the sixth lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis satisfy:

0.5＜CT6/CT5＜1.2。

3. the optical imaging lens of claim 1, wherein the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis satisfy:

0.3＜ImgH/TTL＜1.3。

4. the optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on the optical axis and a separation distance T12 of the first lens and the second lens on the optical axis satisfy:

0.5≤CT1/T12＜1.5。

5. the optical imaging lens according to claim 1, further comprising a diaphragm, wherein a distance SD from the diaphragm to an image side surface of the sixth lens along the optical axis and a distance SL from the diaphragm to an imaging surface of the optical imaging lens along the optical axis satisfy:

0.5＜SD/SL＜1.0。

6. the optical imaging lens of claim 1, wherein the on-axis distance SAG41 from the intersection point of the object-side surface and the optical axis of the fourth lens to the effective radius vertex of the object-side surface of the fourth lens, the on-axis distance SAG52 from the intersection point of the image-side surface and the optical axis of the fifth lens to the effective radius vertex of the image-side surface of the fifth lens, the on-axis distance SAG11 from the intersection point of the object-side surface and the optical axis of the first lens to the effective radius vertex of the object-side surface of the first lens, and the on-axis distance SAG12 from the intersection point of the image-side surface and the optical axis of the first lens to the effective radius vertex of the image-side surface of the first lens satisfy:

-1.0＜(SAG41+SAG52)/(SAG11+SAG12)＜-0.5。

7. the optical imaging lens of claim 1, wherein the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT12 of the image side surface of the first lens satisfy:

0.3＜DT31/DT12＜0.8。

8. the optical imaging lens of claim 1, wherein a combined focal length f34 of the third and fourth lenses and a combined focal length f12 of the first and second lenses satisfy:

-1＜f34/f12＜0。

9. 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 central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis satisfy:

0.5＜(ET3+ET4)/(CT3+CT4)＜1.0。

10. the optical imaging lens of any one of claims 1 to 9, wherein 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 R2 of the image-side surface of the first lens, and the radius of curvature R1 of the object-side surface of the first lens satisfy:

0＜(R3+R4)/(R2-R1)＜1.0。

11. the optical imaging lens according to any one of claims 1 to 9, wherein a curvature radius R11 of an object side surface of the sixth lens, a curvature radius R12 of an image side surface of the sixth lens, a curvature radius R5 of an object side surface of the third lens, and a curvature radius R6 of an image side surface of the third lens satisfy:

0＜(R11+R12)/(R5-R6)＜0.5。

12. the optical imaging lens according to any one of claims 1 to 9, wherein a radius of curvature R8 of an image-side surface of the fourth lens and a radius of curvature R10 of an image-side surface of the fifth lens satisfy:

-1.3＜R8/R10＜-0.3。

13. the optical imaging lens according to any one of claims 1 to 9, characterized in that the maximum effective radius DT22 of the image-side surface of the second lens, the maximum effective radius DT32 of the image-side surface of the third lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy:

0＜(DT22+DT32)/(f2-f3)＜1.0。

14. the optical imaging lens according to any one of claims 1 to 9, characterized in that the maximum optical distortion dist.

|Dist.|＜2％。

15. The optical imaging lens according to any one of claims 1 to 9,

the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;

the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface.

16. The optical imaging lens according to any one of claims 1 to 9,

the image side surface of the fourth lens is a concave surface; and

the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface.