CN107783260B

CN107783260B - Imaging lens

Info

Publication number: CN107783260B
Application number: CN201711309675.4A
Authority: CN
Inventors: 周鑫; 杨健; 闻人建科
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2017-12-11
Filing date: 2017-12-11
Publication date: 2023-03-31
Anticipated expiration: 2037-12-11
Also published as: CN107783260A

Abstract

The application discloses imaging lens includes from object side to image side in proper order: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a focal power; a fourth lens with negative focal power, wherein the image side surface of the fourth lens is a concave surface; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; the maximum half field angle HFOV of the imaging lens is less than or equal to 25 degrees, and f/f1 between the effective focal length f of the imaging lens and the effective focal length f1 of the first lens is more than or equal to 2.0. The imaging lens has small depth of field and large magnification, and is suitable for shooting distant scenes and miniaturized.

Description

Imaging lens

Technical Field

The invention relates to an imaging lens, in particular to an imaging lens consisting of six lenses.

Background

With the increasing popularity of smart phones and the advantages of portability, people want to be able to use a mobile phone to shoot scenes at a longer distance in the field, highlight the main body and blur the background. This requires an imaging lens that is small enough in size and light enough to be mounted in an electronic device such as a smartphone on the one hand, and that has a long focal length, is capable of taking a distant scene, and has good imaging quality on the other hand.

The invention provides an imaging lens which has small depth of field and large magnification, is suitable for shooting distant scenes and is miniaturized.

Disclosure of Invention

To solve at least one problem in the prior art, the present invention provides an imaging lens.

One aspect of the present invention provides an imaging lens, including, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens with negative focal power, wherein the image side surface of the fourth lens is a concave surface; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; the maximum half field angle HFOV of the imaging lens is less than or equal to 25 degrees, and f/f1 between the effective focal length f of the imaging lens and the effective focal length f1 of the first lens is more than or equal to 2.0.

According to one embodiment of the invention, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the imaging lens meet the condition that TTL/f is less than or equal to 1.0.

According to one embodiment of the present invention, 0.4-f 2/f4<1.5 is satisfied between the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens.

According to one embodiment of the present invention, the effective focal length f of the imaging lens and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy 4.0-straw f/T34<5.0.

According to an embodiment of the present invention, 0.5-R12/R11 <2.0 is satisfied between the radius of curvature R12 of the image-side surface of the sixth lens and the radius of curvature R11 of the object-side surface of the sixth lens.

According to one embodiment of the present invention, 1.0< -f 1/R1<2.0 is satisfied between the effective focal length f1 of the first lens and the radius of curvature R1 of the object-side surface of the first lens.

According to one embodiment of the present invention, the effective focal length f2 of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy-2.5-f 2/R4< -1.0.

According to an embodiment of the present invention, the center thickness CT1 of the first lens and the air space T12 of the first lens and the second lens on the optical axis satisfy 4.0-bundle ct1/T12<5.5.

According to one embodiment of the invention, the effective focal length f of the optical imaging lens group and the curvature radius R1 of the object side surface of the first lens meet the conditions that 3.5< -f/R1 <4.5.

According to one embodiment of the invention, the effective focal length f of the imaging lens, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 3.0< | f/f1| + | f/f2| <4.0.

According to an embodiment of the present invention, 0-t ct4/CT5<1.0 is satisfied between the center thickness CT4 of the fourth lens and the center thickness CT5 of the fifth lens.

According to an embodiment of the present invention, 1.5T 45/T56<4.0 is satisfied between an air interval T45 of the fourth lens and the fifth lens on the optical axis and an air interval T56 of the fifth lens and the sixth lens on the optical axis.

According to one embodiment of the present invention, the effective focal length f of the imaging lens and the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens satisfy-0.9 and/or-f/f 456< -0.3.

According to an embodiment of the present invention, the center thickness CT5 of the fifth lens and the air space T56 on the optical axis between the fifth lens and the sixth lens satisfy 6.0-bundle ct5/T56<20.0.

According to one embodiment of the present invention, 0< -R8/R9 <1.0 is satisfied between the radius of curvature R8 of the image-side surface of the fourth lens and the radius of curvature R9 of the object-side surface of the fifth lens.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of the sixth lens element being convex, and the image-side surface of the sixth lens element being concave; wherein, the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens are all less than 0.4 and are less than f2/f4 and less than 1.5.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the imaging lens meet the condition that TTL/f is less than or equal to 1.0.

One aspect of the present invention provides an imaging lens, including, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens with negative focal power, wherein the image side surface of the fourth lens is a concave surface; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein, the effective focal length f of the imaging lens and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy 4.0-T/T34 <5.0.

One aspect of the present invention provides an imaging lens, including, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; and the curvature radius R12 of the image side surface of the sixth lens and the curvature radius R11 of the object side surface of the sixth lens meet the condition that the sum R12/R11 is less than 2.0 in a range of 0.5.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens with negative focal power, wherein the image side surface of the fourth lens is a concave surface; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein, the effective focal length f1 of the first lens and the curvature radius R1 of the object side surface of the first lens meet 1.0 and < -f1/R1 <2.0.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a focal power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein, the effective focal length f2 of the second lens and the curvature radius R4 of the image side surface of the second lens meet-2.5 and are woven into f2/R4< -1.0.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a focal power; a fourth lens with negative focal power, wherein the image side surface of the fourth lens is a concave surface; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein the central thickness CT1 of the first lens and the air interval T12 of the first lens and the second lens on the optical axis satisfy 4.0-T CT1/T12<5.5.

One aspect of the present invention provides an imaging lens, including, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a focal power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of the sixth lens element being convex, and the image-side surface of the sixth lens element being concave; and the effective focal length f of the optical imaging lens group and the curvature radius R1 of the object side surface of the first lens meet the requirement that f/R1 is less than 4.5 of a bundle of 3.5.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a focal power; a fourth lens with negative focal power, wherein the image side surface of the fourth lens is a concave surface; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; the effective focal length f of the imaging lens, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens meet 3.0< | f/f1| + | f/f2| <4.0.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a focal power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein 0< -CT4/CT 5<1.0 is satisfied between the central thickness CT4 of the fourth lens and the central thickness CT5 of the fifth lens.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a focal power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein 1.5T 45/T56<4.0 is satisfied between an air interval T45 of the fourth lens and the fifth lens on the optical axis and an air interval T56 of the fifth lens and the sixth lens on the optical axis.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein the maximum half field angle HFOV of the imaging lens is less than or equal to 25 degrees, and the effective focal length f of the imaging lens and the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens meet the condition that the sum of f/f456 is less than-0.3.

One aspect of the present invention provides an imaging lens, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of the sixth lens element being convex, and the image-side surface of the sixth lens element being concave; and the effective focal length f of the imaging lens and the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens meet-0.9 and are woven into f/f456< -0.3.

One aspect of the present invention provides an imaging lens, including, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens having a negative refractive power, an image-side surface of which is concave; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; wherein 6.0-straw CT5/T56<20.0 is satisfied between the central thickness CT5 of the fifth lens and the air space T56 of the fifth lens and the sixth lens on the optical axis.

One aspect of the present invention provides an imaging lens, including, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens with negative focal power, wherein the image side surface of the fourth lens is a concave surface; a fifth lens having a refractive power, an object-side surface of which is convex; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; and the curvature radius R8 of the image side surface of the fourth lens and the curvature radius R9 of the object side surface of the fifth lens meet the condition that the sum R8/R9 is less than 1.0.

The imaging lens has small depth of field and large magnification; the lens is matched with a wide-angle lens, so that a large magnification and a good imaging effect can be obtained under the condition of automatic focusing; compared with the existing lens, the lens can shoot a larger image at the same distance, is suitable for shooting a distant scene, and can simultaneously ensure the processing characteristic and the miniaturization.

Drawings

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

fig. 1 shows a schematic configuration diagram of an imaging lens of embodiment 1;

fig. 2 to 5 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens of embodiment 1;

fig. 6 is a schematic structural view showing an imaging lens of embodiment 2;

fig. 7 to 10 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of an imaging lens of embodiment 2;

fig. 11 is a schematic structural view showing an imaging lens of embodiment 3;

fig. 12 to 15 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of an imaging lens of embodiment 3;

fig. 16 is a schematic structural view showing an imaging lens of embodiment 4;

fig. 17 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of an imaging lens of embodiment 4;

fig. 21 is a schematic structural view showing an imaging lens of embodiment 5;

fig. 22 to 25 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens of embodiment 5;

fig. 26 is a schematic structural view showing an imaging lens of embodiment 6;

fig. 27 to 30 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of an imaging lens of embodiment 6;

fig. 31 is a schematic structural view showing an imaging lens of embodiment 7;

fig. 32 to 35 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of an imaging lens of embodiment 7;

fig. 36 is a schematic structural view showing an imaging lens of embodiment 8;

fig. 37 to 40 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an imaging lens of embodiment 8;

fig. 41 is a schematic structural view showing an imaging lens of embodiment 9;

fig. 42 to 45 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of an imaging lens of embodiment 9, respectively;

fig. 46 is a schematic structural view showing an imaging lens of embodiment 10; and

fig. 47 to 50 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens of embodiment 10, respectively.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.

It will be understood that when an element or layer is referred to herein as being "on," "connected to" or "coupled to" another element or layer, it can be directly on, connected or coupled to the other element or layer or intervening elements or layers may be present. When an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout the specification. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood that, although the

terms

1, 2, first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, features that are not limited to a single plural form are also intended to include plural forms of features unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "including" and/or "includes," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. A statement such as "at least one of" when appearing after a list of elements modifies the entire list of elements rather than modifying individual elements within the list. Furthermore, the use of "may" mean "one or more embodiments of the application" when describing embodiments of the 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, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

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

In the embodiment of the application, the maximum half field angle HFOV of the imaging lens is less than or equal to 25 degrees, and specifically, the maximum half field angle HFOV is less than or equal to 19 degrees. And f/f1 between the effective focal length f of the imaging lens and the effective focal length f1 of the first lens is more than or equal to 2.0, and particularly, f/f1 is more than or equal to 2.00. By satisfying the relationship, the maximum half field angle of the imaging lens can be reasonably controlled, and the effective focal length of the first lens is reasonably selected, so that the imaging lens can meet the long-focus characteristic and has better capability of balancing aberration.

In the embodiment of the application, a distance TTL/f between an on-axis distance TTL from an object side surface of the first lens element to the image plane and an effective focal length f of the imaging lens is less than or equal to 1.0, and specifically, the distance TTL/f is less than or equal to 0.91. By satisfying the above relation, the distance on the axis from the object side surface of the first lens to the imaging surface of the optical system and the effective focal length thereof can be reasonably controlled, and the miniaturization of the lens is maintained while the telephoto characteristic of the lens is satisfied.

In the embodiment of the present application, 0.4-f 2/f4<1.5, specifically, 0.49 ≦ f2/f4 ≦ 1.17 between the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens is satisfied. By satisfying the above relationship, the effective focal lengths of the second lens and the fourth lens can be reasonably selected, so that the imaging lens has better capability of balancing field curvature.

In the embodiment of the present application, the effective focal length f of the imaging lens and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy 4.0-T/T34 <5.0, specifically, satisfy 4.60 ≦ f/T34 ≦ 4.78. Through satisfying above-mentioned relation, can rationally set up the air space of third lens and fourth lens on the optical axis, make imaging lens can balance field curvature and distortion more easily.

In the embodiment of the present application, the radii of curvature R12, R11 of the image-side surface and the object-side surface of the sixth lens satisfy 0.5-sR12/R11 <2.0, more specifically, satisfy 0.68 ≦ R12/R11 ≦ 1.83. Through satisfying above-mentioned relation, can rationally set up the radius of curvature of sixth lens image side face and object side face, make imaging lens can match the chief ray angle of chip better.

In the embodiment of the present application, 1.0-f 1/R1<2.0 between the effective focal length f1 of the first lens and the radius of curvature R1 of the object-side surface of the first lens, more specifically, 1.74. Ltoreq. F1/R1. Ltoreq.1.88 is satisfied. By satisfying the above relationship, the effective focal length and the curvature radius of the first lens can be reasonably set, so that the imaging lens has better astigmatism balancing capability.

In the embodiment of the present application, the effective focal length f2 of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy-2.5 < f2/R4< -1.0, more specifically satisfy-2.07 ≦ f2/R4 ≦ -1.49. By satisfying the above relation, the curvature radius of the second lens can be reasonably set, so that the imaging lens has better capability of balancing field curvature and distortion.

In the embodiment of the present application, 4.0-T ct1/T12<5.5 between the center thickness CT1 of the first lens and the air interval T12 of the first lens and the second lens on the optical axis are satisfied, more specifically, 4.47 ≦ CT1/T12 ≦ 5.06. By satisfying the above relationship, the ratio between the central thickness of the first lens and the air space of the first lens and the second lens on the optical axis can be reasonably controlled, so that the optical system has better capability of balancing field curvature and dispersion.

In the embodiment of the application, the effective focal length f of the optical imaging lens group and the curvature radius R1 of the object side surface of the first lens meet the condition that f/R1 is less than 3.5 and less than 4.5, and more specifically, the condition that f/R1 is less than or equal to 3.57 and less than or equal to 4.05. Through satisfying above-mentioned relation, can rationally set up the radius of curvature of first lens, can balance the aberration more easily, promote the imaging performance of system.

In the embodiment of the application, the effective focal length f of the imaging lens, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 3.0< | f/f1| + | f/f2| <4.0, and more specifically satisfy 3.30 ≦ f/f1| + | f/f2| ≦ 3.59. By satisfying the above relationship, the effective focal lengths of the first lens and the second lens can be reasonably distributed, and the deflection angle of light rays is reduced, thereby reducing the sensitivity of the system.

In the embodiment of the present application, 0-straw CT4/CT5<1.0 is satisfied between the center thickness CT4 of the fourth lens and the center thickness CT5 of the fifth lens, and more specifically, 0.43. Ltoreq. CT4/CT 5. Ltoreq.0.57 is satisfied. Through the central thickness of rational distribution fourth lens and fifth lens, enable imaging lens to have the ability of well balanced coma.

In the embodiment of the present application, 1.5-T45/T56 <4.0 between the air interval T45 of the fourth lens and the fifth lens on the optical axis and the air interval T56 of the fifth lens and the sixth lens on the optical axis are satisfied, more specifically, 1.54 ≦ T45/T56 ≦ 3.85. By satisfying the above relationship, the ratio of the air space of the fourth lens and the fifth lens on the optical axis to the air space of the fifth lens and the sixth lens on the optical axis can be reasonably controlled, so that the optical system has better capability of balancing dispersion and distortion.

In the embodiment of the present application, the effective focal length f of the imaging lens and the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens satisfy-0.9 < -f/f 456< -0.3, more specifically satisfy-0.76. Ltoreq. F/f 456. Ltoreq.0.44. By satisfying the above relationship, the combined focal length of the fourth lens, the fifth lens and the sixth lens can be reasonably set, so that the focal length distribution of the system is reasonable, and the sensitivity of the system is reduced.

In the embodiment of the present application, the center thickness CT5 of the fifth lens and the air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy 6.0-straw CT5/T56<20.0, more specifically, 6.78 ≦ CT5/T56 ≦ 15.94. By satisfying the relationship, the ratio of the central thickness of the fifth lens to the air space between the fifth lens and the sixth lens on the optical axis can be reasonably controlled, so that astigmatism is balanced, and the system performance is improved.

In the embodiment of the present application, a radius of curvature R8 of the image-side surface of the fourth lens and a radius of curvature R9 of the object-side surface of the fifth lens satisfy 0-sR8/R9 <1.0, more specifically, satisfy 0.40. Ltoreq. R8/R9. Ltoreq.0.88. By satisfying the relationship, the ratio of the curvature radius of the image side surface of the fourth lens to the curvature radius of the object side surface of the fifth lens can be reasonably set, and the distortion of the system is controlled within an acceptable range.

The present application is further described below with reference to specific examples.

Example 1

An imaging lens according to embodiment 1 of the present application is described first with reference to fig. 1 to 5.

Fig. 1 is a schematic diagram showing a structure of an imaging lens of embodiment 1. As shown in fig. 1, the imaging lens includes 6 lenses. The 6 lenses are respectively a first lens E1 having an object-side surface S1 and an image-side surface S2, a second lens E2 having an object-side surface S3 and an image-side surface S4, a third lens E3 having an object-side surface S5 and an image-side surface S6, a fourth lens E4 having an object-side surface S7 and an image-side surface S8, a fifth lens E5 having an object-side surface S9 and an image-side surface S10, and a sixth lens E6 having an object-side surface S11 and an image-side surface S12. The first lens E1 to the sixth lens E6 are disposed in order from the object side to the image side of the imaging lens.

The first lens element E1 may have positive power, and the object-side surface S1 may be convex and the image-side surface S2 may be concave.

The second lens element E2 may have a negative power, and the object-side surface S3 may be a convex surface and the image-side surface S4 may be a concave surface.

The third lens element E3 may have positive power, and the object-side surface S5 may be convex and the image-side surface S6 may be concave.

The fourth lens element E4 may have a negative power, and the object-side surface S7 and the image-side surface S8 may be concave.

The fifth lens element E5 may have positive power, and the object-side surface S9 may be convex and the image-side surface S10 may be concave.

The sixth lens element E6 may have positive power, and the object-side surface S11 and the image-side surface S12 may be convex and concave.

The imaging lens further comprises a filter E7 which is used for filtering infrared light and provided with an object side surface S13 and an image side surface S14. In this embodiment, light from the object passes through the respective surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

In this embodiment, the first lens E1 to the sixth lens E6 have respective effective focal lengths f1 to f6, respectively. The first lens E1 to the sixth lens E6 are arranged in sequence along the optical axis and together determine the total effective focal length f of the imaging lens. Table 1 below shows effective focal lengths f1 to f6 of the first to sixth lenses E1 to E6, a total effective focal length f of the imaging lens, a total length TTL (mm) of the imaging lens, and a maximum half field angle HFOV (°) of the imaging lens.

TABLE 1

Table 2 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 2

In the present embodiment, each lens may be an aspheric lens, and each aspheric surface type x is defined by the following 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 =1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 2); ai is the correction coefficient of the i-th order of the aspherical surface.

Table 3 below shows the high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.5350E-03

3.5580E-03

-1.1550E-02

3.0674E-02

-4.7720E-02

4.6058E-02

-2.6700E-02

8.5570E-03

-1.1700E-03

S2

-8.9000E-04

2.8842E-02

-5.5090E-02

1.3034E-01

-2.3843E-01

2.8940E-01

-2.1771E-01

9.1155E-02

-1.6220E-02

S3

-3.9620E-02

1.1025E-01

-8.6350E-02

1.0255E-02

1.1928E-01

-2.3770E-01

2.2375E-01

-1.1053E-01

2.2984E-02

S4

-5.5000E-02

1.2780E-01

-6.6180E-02

-1.9730E-02

2.0941E-01

-3.4847E-01

2.6783E-01

-9.9320E-02

1.0060E-02

S5

-3.2170E-02

5.7507E-02

1.8309E-02

-7.7100E-03

-1.8040E-02

9.5144E-02

-1.6974E-01

1.2492E-01

-3.3630E-02

S6

5.0950E-03

3.8011E-02

3.5510E-03

2.9370E-02

-1.0845E-01

2.2189E-01

-2.5339E-01

1.4661E-01

-3.3720E-02

S7

-1.0870E-01

9.0019E-02

-1.2437E-01

1.2104E-01

-6.8940E-02

1.7365E-02

1.9930E-03

-2.0900E-03

3.2500E-04

S8

-4.5410E-02

6.3557E-02

-8.5780E-02

7.0264E-02

-3.5550E-02

1.1069E-02

-2.0300E-03

1.9600E-04

-7.3000E-06

S9

-4.7870E-02

6.6525E-02

-6.1850E-02

3.6553E-02

-1.3970E-02

3.4400E-03

-5.3000E-04

4.5900E-05

-1.8000E-06

S10

-6.8720E-02

4.1577E-02

-2.8380E-02

1.6460E-02

-7.1600E-03

2.1760E-03

-4.2000E-04

4.5300E-05

-2.0000E-06

S11

-6.0740E-02

3.7620E-02

-2.0610E-02

1.0349E-02

-4.1400E-03

1.1650E-03

-2.1000E-04

2.0300E-05

-8.3000E-07

S12

-5.3530E-02

3.0561E-02

-1.3830E-02

5.3220E-03

-1.7300E-03

4.1700E-04

-6.6000E-05

5.8100E-06

-2.2000E-07

TABLE 3

Fig. 2 shows an on-axis chromatic aberration curve of the imaging lens of embodiment 1, which represents the convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 3 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 1. Fig. 4 shows distortion curves of the imaging lens of embodiment 1, which represent distortion magnitude values in the case of different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the imaging lens. As described above and as can be seen by referring to fig. 2 to 5, the imaging lens according to embodiment 1 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant subject and is miniaturized.

Example 2

An imaging lens according to embodiment 2 of the present application is described below with reference to fig. 6 to 10.

Fig. 6 is a schematic diagram showing the structure of an imaging lens of embodiment 2. As shown in fig. 6, the imaging lens includes 6 lenses. The 6 lenses are a first lens E1 having an object-side surface S1 and an image-side surface S2, a second lens E2 having an object-side surface S3 and an image-side surface S4, a third lens E3 having an object-side surface S5 and an image-side surface S6, a fourth lens E4 having an object-side surface S7 and an image-side surface S8, a fifth lens E5 having an object-side surface S9 and an image-side surface S10, and a sixth lens E6 having an object-side surface S11 and an image-side surface S12, respectively. The first lens E1 to the sixth lens E6 are disposed in order from the object side to the image side of the imaging lens.

The third lens element E3 may have a negative power, and the object-side surface S5 may be a convex surface and the image-side surface S6 may be a concave surface.

The fourth lens element E4 may have a negative power, and the object-side surface S7 and the image-side surface S8 may be convex and concave, respectively.

The fifth lens element E5 may have a negative power, and the object-side surface S9 and the image-side surface S10 may be convex and concave.

The imaging lens further comprises a filter E7 which is used for filtering infrared light and provided with an object side surface S13 and an image side surface S14. In this embodiment, light from the object passes through the respective surfaces S1 to S14 in sequence to be finally imaged on the imaging surface S15.

Table 4 below shows effective focal lengths f1 to f6 of the first to sixth lenses E1 to E6, a total effective focal length f of the imaging lens, a total length TTL of the imaging lens, and a maximum half field angle HFOV (°) of the imaging lens.

f1(mm)	3.28	f(mm)	6.72
				f2(mm)	-5.14	TTL(mm)	6.48
f3(mm)	-58.80	HFOV(°)	20.0
				f4(mm)	-5.38
f5(mm)	-497.65
				f6(mm)	7.96

TABLE 4

Table 5 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 5

Table 6 below shows the high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment. Wherein each aspherical surface type can be defined by formula (1) given in embodiment 1 above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.6480E-03

3.6370E-03

-1.1900E-02

3.1251E-02

-4.8290E-02

4.6256E-02

-2.6620E-02

8.4720E-03

-1.1500E-03

S2

4.9500E-04

2.8326E-02

-6.6970E-02

1.7245E-01

-3.2233E-01

3.9167E-01

-2.9221E-01

1.2102E-01

-2.1280E-02

S3

-3.7310E-02

1.0516E-01

-9.8170E-02

7.3930E-02

-2.2660E-02

-4.4160E-02

6.4482E-02

-3.7370E-02

8.5790E-03

S4

-5.3570E-02

1.1949E-01

-4.1460E-02

-1.2708E-01

5.7839E-01

-1.1093E+00

1.1986E+00

-7.1401E-01

1.8075E-01

S5

-3.2480E-02

5.8281E-02

2.9140E-02

-5.3590E-02

8.2672E-02

-4.1350E-02

-6.2020E-02

8.1603E-02

-2.7130E-02

S6

5.7930E-03

3.9486E-02

1.9262E-02

-3.5600E-02

3.4348E-02

2.3937E-02

-8.9150E-02

7.1809E-02

-1.9320E-02

S7

-9.3850E-02

6.4524E-02

-8.6120E-02

8.0345E-02

-4.2000E-02

8.2920E-03

2.4400E-03

-1.5200E-03

2.1100E-04

S8

-4.2830E-02

5.3949E-02

-7.0990E-02

5.5852E-02

-2.7050E-02

8.0240E-03

-1.3900E-03

1.2300E-04

-3.9000E-06

S9

-4.7130E-02

6.3033E-02

-5.7530E-02

3.4160E-02

-1.3430E-02

3.4660E-03

-5.7000E-04

5.3100E-05

-2.2000E-06

S10

-8.3080E-02

5.4482E-02

-3.9220E-02

2.4203E-02

-1.0900E-02

3.3080E-03

-6.3000E-04

6.6600E-05

-3.0000E-06

S11

-5.6400E-02

2.9029E-02

-1.4650E-02

8.0370E-03

-3.6600E-03

1.1350E-03

-2.1000E-04

2.2200E-05

-9.6000E-07

S12

-5.2900E-02

2.9148E-02

-1.3100E-02

4.9330E-03

-1.5600E-03

3.7500E-04

-6.0000E-05

5.4800E-06

-2.1000E-07

TABLE 6

Fig. 7 shows on-axis chromatic aberration curves of the imaging lens of embodiment 2, which represent convergent focus deviations of light rays of different wavelengths after passing through an optical system. Fig. 8 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 2. Fig. 9 shows distortion curves of the imaging lens of embodiment 2, which represent distortion magnitude values in the case of different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 2, which represents a deviation of different image heights on the imaging plane after light passes through the imaging lens. As can be seen from the above and with reference to fig. 7 to 10, the imaging lens according to embodiment 2 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant scene and is miniaturized.

Example 3

An imaging lens according to embodiment 3 of the present application is described below with reference to fig. 11 to 15.

Fig. 11 is a schematic diagram showing the structure of an imaging lens of embodiment 3. The imaging lens comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 from the object side to the image side in sequence.

Table 7 below shows the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, the total effective focal length f of the imaging lens, the total length TTL of the imaging lens, and the maximum half field angle HFOV (°) of the imaging lens.

f1(mm)	3.29	f(mm)	6.73
				f2(mm)	-5.16	TTL(mm)	6.46
f3(mm)	-81.62	HFOV(°)	20.0
				f4(mm)	-4.83
f5(mm)	8.27
				f6(mm)	642.17

TABLE 7

Table 8 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 8

Table 9 below shows high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment, wherein the respective aspherical surface types can be defined by formula (1) given in embodiment 1 above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

3.2160E-03

4.4330E-03

-1.4050E-02

3.5340E-02

-5.2800E-02

4.9171E-02

-2.7720E-02

8.7040E-03

-1.1700E-03

S2

5.4860E-03

1.7573E-02

-4.4340E-02

1.2034E-01

-2.2704E-01

2.7370E-01

-2.0202E-01

8.2410E-02

-1.4240E-02

S3

-3.2230E-02

7.8399E-02

-2.6840E-02

-9.4810E-02

3.1085E-01

-5.0169E-01

4.5874E-01

-2.2881E-01

4.8417E-02

S4

-5.1660E-02

9.0208E-02

9.0751E-02

-6.2058E-01

1.9739E+00

-3.6836E+00

4.1288E+00

-2.5703E+00

6.8237E-01

S5

-2.8200E-02

5.4452E-02

-1.9860E-02

1.9535E-01

-6.0651E-01

1.1295E+00

-1.2568E+00

7.5513E-01

-1.8777E-01

S6

1.2724E-02

3.8514E-02

-1.5860E-02

1.2860E-01

-4.0005E-01

7.2874E-01

-7.7483E-01

4.3904E-01

-1.0197E-01

S7

-1.1061E-01

1.0743E-01

-1.3591E-01

1.0780E-01

-4.4320E-02

3.2650E-03

4.8740E-03

-1.9400E-03

2.3500E-04

S8

-6.7140E-02

1.1629E-01

-1.3730E-01

9.3712E-02

-3.9500E-02

1.0318E-02

-1.5900E-03

1.2700E-04

-3.6000E-06

S9

-6.8310E-02

1.0690E-01

-9.5670E-02

5.2782E-02

-1.8790E-02

4.3450E-03

-6.3000E-04

5.2800E-05

-1.9000E-06

S10

-6.3570E-02

3.5276E-02

-1.9000E-02

9.4220E-03

-3.7400E-03

1.0610E-03

-1.9000E-04

2.0200E-05

-8.9000E-07

S11

-5.0550E-02

2.5467E-02

-1.0960E-02

4.5710E-03

-1.6800E-03

4.6000E-04

-8.1000E-05

7.9700E-06

-3.3000E-07

S12

-5.1000E-02

2.7796E-02

-1.2680E-02

4.7190E-03

-1.4300E-03

3.2300E-04

-4.9000E-05

4.3300E-06

-1.7000E-07

TABLE 9

Fig. 12 shows on-axis chromatic aberration curves of an imaging lens of embodiment 3, which represent convergent focus shifts of light rays of different wavelengths after passing through an optical system. Fig. 13 shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 3. Fig. 14 shows distortion curves of the imaging lens of embodiment 3, which represent distortion magnitude values in the case of different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the imaging lens. As described above and as can be seen with reference to fig. 12 to 15, the imaging lens according to embodiment 3 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant subject and is miniaturized.

Example 4

An imaging lens according to embodiment 4 of the present application is described below with reference to fig. 16 to 20.

Fig. 16 is a schematic diagram showing the structure of an imaging lens of embodiment 4. The imaging lens comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 from the object side to the image side in sequence.

The second lens element E2 may have a negative power, and the object-side surface S3 may be convex and the image-side surface S4 may be concave.

The third lens element E3 may have a negative power, and the object-side surface S5 may be convex and the image-side surface S6 may be concave.

The fifth lens element E5 may have a positive power, and the object-side surface S9 may be convex and the image-side surface S10 may be concave.

The sixth lens element E6 may have a negative power, and the object-side surface S11 may be a convex surface and the image-side surface S12 may be a concave surface.

The following table 10 shows effective focal lengths f1 to f6 of the first to sixth lenses E1 to E6, a total effective focal length f of the imaging lens, a total length TTL of the imaging lens, and a maximum half field angle HFOV (°) of the imaging lens.

TABLE 10

Table 11 below shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 11

Table 12 below shows high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment, wherein the respective aspherical surface types can be defined by formula (1) given in example 1 above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

3.2430E-03

3.3320E-03

-9.5700E-03

2.4748E-02

-3.6670E-02

3.3309E-02

-1.8120E-02

5.4790E-03

-7.2000E-04

S2

5.4670E-03

1.8527E-02

-3.7450E-02

7.4559E-02

-1.1259E-01

1.1679E-01

-7.7070E-02

2.8115E-02

-4.3000E-03

S3

-3.1880E-02

7.7121E-02

-1.3120E-02

-1.7255E-01

4.9681E-01

-7.2658E-01

6.0032E-01

-2.6988E-01

5.1567E-02

S4

-5.2070E-02

1.1037E-01

-9.0250E-02

2.6074E-01

-7.2730E-01

1.4992E+00

-1.8426E+00

1.1944E+00

-3.1601E-01

S5

-2.9990E-02

7.7467E-02

-1.4688E-01

5.8129E-01

-1.3445E+00

2.0271E+00

-1.9041E+00

9.8654E-01

-2.1310E-01

S6

1.0654E-02

6.9840E-02

-1.9640E-01

7.5940E-01

-1.7903E+00

2.6786E+00

-2.4352E+00

1.2115E+00

-2.5159E-01

S7

-1.0071E-01

3.9927E-02

4.4020E-02

-2.2502E-01

3.3672E-01

-2.6284E-01

1.1597E-01

-2.7450E-02

2.7110E-03

S8

-6.4880E-02

1.2368E-01

-1.5532E-01

1.1155E-01

-5.0020E-02

1.4440E-02

-2.6400E-03

2.8100E-04

-1.3000E-05

S9

-7.5430E-02

1.1673E-01

-1.0630E-01

6.3821E-02

-2.6650E-02

7.7160E-03

-1.4700E-03

1.6300E-04

-7.9000E-06

S10

-5.3460E-02

3.2532E-02

-2.1910E-02

1.2131E-02

-4.4500E-03

1.0080E-03

-1.3000E-04

8.8700E-06

-2.2000E-07

S11

-5.4780E-02

2.6019E-02

-3.9100E-03

-5.0400E-03

4.3710E-03

-1.6800E-03

3.5500E-04

-4.0000E-05

1.8400E-06

S12

-5.9320E-02

2.9718E-02

-8.1000E-03

-1.0400E-03

1.9270E-03

-8.0000E-04

1.7100E-04

-1.9000E-05

8.9200E-07

TABLE 12

Fig. 17 shows on-axis chromatic aberration curves of the imaging lens of embodiment 4, which represent convergent focus deviations of light rays of different wavelengths after passing through an optical system. Fig. 18 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 4. Fig. 19 shows distortion curves of the imaging lens of embodiment 4, which represent distortion magnitude values in the case of different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 4, which represents a deviation of different image heights on the imaging plane after light passes through the imaging lens. In summary, and as can be seen with reference to fig. 17 to 20, the imaging lens according to embodiment 4 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant scene and is miniaturized.

Example 5

An imaging lens according to embodiment 5 of the present application is described below with reference to fig. 21 to 25.

Fig. 21 is a schematic diagram showing a structure of an imaging lens of embodiment 5. The imaging lens comprises a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5 and a sixth lens element E6 in sequence from the object side to the image side.

The first lens element E1 may have positive power, and the object-side surface S1 and the image-side surface S2 may be convex surfaces.

Table 13 below shows effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, a total effective focal length f of the imaging lens, a total length TTL of the imaging lens, and a maximum half field angle HFOV (°) of the imaging lens.

Watch 13

Table 14 below shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 14

Table 15 below shows the high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment, wherein the respective aspherical surface types can be defined by the formula (1) given in the above-described embodiment 1.

/>

Watch 15

Fig. 22 shows on-axis chromatic aberration curves of the imaging lens of embodiment 5, which represent convergent focus deviations of light rays of different wavelengths after passing through an optical system. Fig. 23 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 5. Fig. 24 shows distortion curves of the imaging lens of embodiment 5, which represent distortion magnitude values in the case of different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 5, which represents a deviation of different image heights on an imaging surface after light passes through the imaging lens. As described above and as can be seen from fig. 22 to 25, the imaging lens according to embodiment 5 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant subject and is miniaturized.

Example 6

An imaging lens according to embodiment 6 of the present application is described below with reference to fig. 26 to 30.

Fig. 26 is a schematic diagram showing a structure of an imaging lens of embodiment 6. The imaging lens comprises a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5 and a sixth lens element E6 in sequence from the object side to the image side.

The following table 16 shows effective focal lengths f1 to f6 of the first to sixth lenses E1 to E6, a total effective focal length f of the imaging lens, a total length TTL of the imaging lens, and a maximum half field angle HFOV (°) of the imaging lens.

f1(mm)	3.30	f(mm)	6.72
				f2(mm)	-5.17	TTL(mm)	6.48
f3(mm)	-71.39	HFOV(°)	20.0
				f4(mm)	-5.16
f5(mm)	9.40
				f6(mm)	120.22

TABLE 16

Table 17 below shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 17

Table 18 below shows the high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment, wherein the respective aspherical surface types can be defined by formula (1) given in example 1 above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.8890E-03

4.0940E-03

-1.3380E-02

3.4535E-02

-5.2770E-02

5.0105E-02

-2.8680E-02

9.1020E-03

-1.2300E-03

S2

2.3250E-03

2.4446E-02

-6.0740E-02

1.6253E-01

-3.0754E-01

3.7488E-01

-2.7993E-01

1.1582E-01

-2.0330E-02

S3

-3.5200E-02

9.2872E-02

-6.5670E-02

-1.9000E-04

1.2340E-01

-2.4482E-01

2.3688E-01

-1.2075E-01

2.5846E-02

S4

-5.2460E-02

1.0542E-01

1.6806E-02

-3.3528E-01

1.1607E+00

-2.1693E+00

2.3876E+00

-1.4565E+00

3.7801E-01

S5

-2.9700E-02

5.5709E-02

1.1360E-03

8.1834E-02

-2.7049E-01

5.3374E-01

-6.2870E-01

3.9001E-01

-9.8210E-02

S6

9.5130E-03

3.8111E-02

1.4660E-03

4.4083E-02

-1.6428E-01

3.3396E-01

-3.8202E-01

2.2452E-01

-5.2940E-02

S7

-1.0190E-01

9.2399E-02

-1.2084E-01

9.8405E-02

-3.7500E-02

-3.4600E-03

9.1640E-03

-3.2700E-03

3.9100E-04

S8

-5.6340E-02

9.3172E-02

-1.1692E-01

8.5664E-02

-3.8320E-02

1.0369E-02

-1.5900E-03

1.1400E-04

-2.0000E-06

S9

-5.6610E-02

8.2019E-02

-7.2920E-02

4.0161E-02

-1.4120E-02

3.1660E-03

-4.4000E-04

3.4300E-05

-1.2000E-06

S10

-6.9650E-02

4.2389E-02

-2.8940E-02

1.7942E-02

-8.4200E-03

2.6910E-03

-5.4000E-04

5.9000E-05

-2.7000E-06

S11

-5.3490E-02

3.0404E-02

-1.6660E-02

8.9430E-03

-3.8100E-03

1.1080E-03

-2.0000E-04

1.9700E-05

-8.2000E-07

S12

-5.1350E-02

2.7771E-02

-1.2270E-02

4.4530E-03

-1.3300E-03

3.0300E-04

-4.7000E-05

4.1500E-06

-1.6000E-07

Watch 18

Fig. 27 shows on-axis chromatic aberration curves of an imaging lens of embodiment 6, which represent convergent focus shifts of light rays of different wavelengths after passing through an optical system. Fig. 28 shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 6. Fig. 29 shows distortion curves of the imaging lens of embodiment 6, which represent distortion magnitude values in the case of different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging plane after light passes through the imaging lens. In summary, and as can be seen with reference to fig. 27 to 30, the imaging lens according to embodiment 6 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant scene and is miniaturized.

Example 7

An imaging lens according to embodiment 7 of the present application is described below with reference to fig. 31 to 35.

Fig. 31 is a schematic diagram showing a structure of an imaging lens of embodiment 7. The imaging lens comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 from the object side to the image side in sequence.

The fourth lens element E4 may have a negative power, and the object-side surface S7 and the image-side surface S8 may be convex and concave.

The fifth lens element E5 may have positive power, and the object-side surface S9 and the image-side surface S10 may be convex.

Table 19 below shows effective focal lengths f1 to f6 of the first to sixth lenses E1 to E6, a total effective focal length f of the imaging lens, a total length TTL of the imaging lens, and a maximum half field angle HFOV (°) of the imaging lens.

f1(mm)	3.28	f(mm)	6.72
				f2(mm)	-5.13	TTL(mm)	6.48
f3(mm)	-61.03	HFOV(°)	20.0
				f4(mm)	-5.35
f5(mm)	6.77
				f6(mm)	-23.68

Watch 19

Table 20 below shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

Watch 20

Table 21 below shows the high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment, wherein the respective aspherical surface types can be defined by formula (1) given in embodiment 1 above.

Flour mark

A4

A6

A8

10

A12

A14

A16

A18

A20

S1

2.6060E-03

3.6920E-03

-1.2240E-02

3.2110E-02

-4.9650E-02

4.7577E-02

-2.7400E-02

8.7230E-03

-1.1800E-03

S2

2.4900E-04

2.8574E-02

-6.7240E-02

1.7266E-01

-3.2164E-01

3.8996E-01

-2.9045E-01

1.2015E-01

-2.1110E-02

S3

-3.7530E-02

1.0480E-01

-9.3200E-02

5.3055E-02

2.9644E-02

-1.2342E-01

1.3614E-01

-7.3050E-02

1.6084E-02

S4

-5.3420E-02

1.1936E-01

-4.1160E-02

-1.2238E-01

5.4719E-01

-1.0176E+00

1.0585E+00

-6.0503E-01

1.4568E-01

S5

-3.2210E-02

5.8218E-02

2.6600E-02

-4.1140E-02

5.0014E-02

1.4855E-02

-1.1934E-01

1.1261E-01

-3.4160E-02

S6

5.7130E-03

3.9841E-02

1.3937E-02

-1.7830E-02

-2.4200E-03

7.4619E-02

-1.3246E-01

9.2547E-02

-2.3720E-02

S7

-1.0329E-01

8.4221E-02

-1.1922E-01

1.1964E-01

-7.2700E-02

2.3450E-02

-2.0500E-03

-8.0000E-04

1.6200E-04

S8

-4.6890E-02

6.9363E-02

-9.6020E-02

7.9034E-02

-3.9910E-02

1.2366E-02

-2.2500E-03

2.1500E-04

-7.9000E-06

S9

-5.0440E-02

7.4171E-02

-7.2560E-02

4.4329E-02

-1.7260E-02

4.2490E-03

-6.3000E-04

5.1500E-05

-1.7000E-06

S10

-5.1040E-02

2.7924E-02

-1.9710E-02

1.1942E-02

-5.3300E-03

1.6540E-03

-3.3000E-04

3.5800E-05

-1.6000E-06

S11

-5.6650E-02

3.4846E-02

-1.8770E-02

9.3420E-03

-3.7200E-03

1.0420E-03

-1.9000E-04

1.8600E-05

-7.9000E-07

S12

-5.1810E-02

2.8521E-02

-1.2240E-02

4.3640E-03

-1.3200E-03

3.0700E-04

-4.8000E-05

4.3400E-06

-1.7000E-07

TABLE 21

Fig. 32 shows on-axis chromatic aberration curves of the imaging lens of embodiment 7, which represent convergent focus deviations of light rays of different wavelengths after passing through an optical system. Fig. 33 shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 7. Fig. 34 shows distortion curves of the imaging lens of embodiment 7, which represent distortion magnitude values in the case of different angles of view. Fig. 35 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 7, which represents a deviation of different image heights on an imaging plane after light passes through the imaging lens. In summary, and as can be seen with reference to fig. 31 to 35, the imaging lens according to embodiment 7 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant scene and is miniaturized.

Example 8

An imaging lens according to embodiment 8 of the present application is described below with reference to fig. 36 to 40.

Fig. 36 is a schematic diagram showing a structure of an imaging lens of embodiment 8. The imaging lens comprises a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 from the object side to the image side in sequence.

The fifth lens element E5 may have a negative power, and the object-side surface S9 may be a convex surface and the image-side surface S10 may be a concave surface.

The sixth lens element E6 may have a negative power, and the object-side surface S11 and the image-side surface S12 may be convex and concave.

Table 22 below shows the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, the total effective focal length f of the imaging lens, the total length TTL of the imaging lens, and the maximum half field angle HFOV (°) of the imaging lens.

f1(mm)	3.32	f(mm)	6.77
				f2(mm)	-5.33	TTL(mm)	6.48
f3(mm)	-56.30	HFOV(°)	20.0
				f4(mm)	-10.87
f5(mm)	-496.01
				f6(mm)	-499.99

TABLE 22

Table 23 below shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

/>

TABLE 23

Table 24 below shows high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment, wherein the respective aspherical surface types can be defined by formula (1) given in embodiment 1 above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.2880E-03

5.3890E-03

-1.9870E-02

5.1145E-02

-7.8250E-02

7.3960E-02

-4.1940E-02

1.3114E-02

-1.7400E-03

S2

8.2500E-04

2.2754E-02

-5.0910E-02

1.4487E-01

-2.9343E-01

3.7783E-01

-2.9443E-01

1.2616E-01

-2.2790E-02

S3

-3.5110E-02

9.8077E-02

-1.1310E-01

2.1791E-01

-4.5074E-01

6.5518E-01

-5.9899E-01

3.0414E-01

-6.5170E-02

S4

-5.2480E-02

1.3917E-01

-2.7254E-01

1.0670E+00

-2.9961E+00

5.4468E+00

-6.0504E+00

3.7146E+00

-9.6815E-01

S5

-3.0790E-02

1.4122E-02

2.6966E-01

-8.3032E-01

1.7342E+00

-2.3073E+00

1.8676E+00

-8.4694E-01

1.6548E-01

S6

7.8140E-03

-1.0700E-02

2.9321E-01

-9.2232E-01

1.8836E+00

-2.4270E+00

1.9076E+00

-8.3884E-01

1.5814E-01

S7

-4.8120E-02

-3.8400E-03

-1.2750E-02

1.7013E-02

-4.0700E-03

-5.5300E-03

5.0490E-03

-1.6400E-03

1.9100E-04

S8

-3.8630E-02

5.2405E-02

-7.2890E-02

6.1043E-02

-3.1610E-02

9.8630E-03

-1.7300E-03

1.4600E-04

-3.6000E-06

S9

-3.9420E-02

6.2094E-02

-6.1730E-02

4.2550E-02

-2.0150E-02

6.2190E-03

-1.1800E-03

1.2500E-04

-5.6000E-06

S10

-9.2980E-02

6.4536E-02

-5.3900E-02

3.8704E-02

-1.9730E-02

6.6240E-03

-1.3700E-03

1.5800E-04

-7.7000E-06

S11

-6.4730E-02

4.0193E-02

-2.3570E-02

1.3639E-02

-6.4300E-03

2.0950E-03

-4.2000E-04

4.7000E-05

-2.2000E-06

S12

-5.2510E-02

2.9065E-02

-1.3540E-02

5.1680E-03

-1.5700E-03

3.5400E-04

-5.4000E-05

4.8100E-06

-1.9000E-07

TABLE 24

Fig. 37 shows on-axis chromatic aberration curves of the imaging lens of embodiment 8, which represent convergent focus deviations of light rays of different wavelengths after passing through an optical system. Fig. 38 shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 8. Fig. 39 shows a distortion curve of the imaging lens of embodiment 8, which represents distortion magnitude values in the case of different angles of view. Fig. 40 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 8, which represents a deviation of different image heights on the imaging plane after light passes through the imaging lens. As can be seen from the above description and with reference to fig. 36 to 40, the imaging lens according to embodiment 8 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant scene and is miniaturized.

Example 9

An imaging lens according to embodiment 9 of the present application is described below with reference to fig. 41 to 45.

Fig. 41 is a schematic diagram showing the structure of an imaging lens of embodiment 9. The imaging lens comprises a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5 and a sixth lens element E6 in sequence from the object side to the image side.

The first lens element E1 may have positive power, and the object-side surface S1 and the image-side surface S2 may be convex.

The second lens element E2 may have a negative power, and the object-side surface S3 and the image-side surface S4 may be concave.

The sixth lens element E6 may have positive power, and the object-side surface S11 may be convex and the image-side surface S12 may be concave.

The following table 25 shows effective focal lengths f1 to f6 of the first to sixth lenses E1 to E6, a total effective focal length f of the imaging lens, a total length TTL of the imaging lens, and a maximum half field angle HFOV (°) of the imaging lens.

f1(mm)	3.10	f(mm)	6.38
				f2(mm)	-4.80	TTL(mm)	6.30
f3(mm)	-35.58	HFOV(°)	21.0
				f4(mm)	-4.72
f5(mm)	11.49
				f6(mm)	13.40

TABLE 25

Table 26 below shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

Watch 26

Table 27 below shows the high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment, wherein the respective aspherical surface types can be defined by formula (1) given in embodiment 1 above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

3.1560E-03

2.4570E-03

-7.2200E-03

2.4185E-02

-4.4840E-02

5.0564E-02

-3.3730E-02

1.2284E-02

-1.8800E-03

S2

7.1290E-03

1.4832E-02

-3.1540E-02

8.2282E-02

-1.7032E-01

2.3835E-01

-2.0781E-01

1.0020E-01

-2.0280E-02

S3

-3.1980E-02

9.0806E-02

-5.9010E-02

-5.9420E-02

3.2000E-01

-6.1343E-01

6.3135E-01

-3.4809E-01

8.1606E-02

S4

-5.3840E-02

1.0742E-01

4.3098E-02

-4.8902E-01

1.6891E+00

-3.2768E+00

3.7535E+00

-2.3915E+00

6.5709E-01

S5

-3.7250E-02

4.5445E-02

9.3415E-02

-2.6973E-01

6.9009E-01

-1.1161E+00

1.0302E+00

-5.1571E-01

1.1130E-01

S6

8.6780E-03

2.2315E-02

1.0251E-01

-3.0557E-01

6.6945E-01

-9.2748E-01

7.6535E-01

-3.5276E-01

7.1301E-02

S7

-8.2580E-02

7.2663E-02

-1.3297E-01

1.2868E-01

-6.1690E-02

7.8170E-03

5.7380E-03

-2.6000E-03

3.2900E-04

S8

-6.2160E-02

1.3550E-01

-2.0287E-01

1.6562E-01

-8.2080E-02

2.5294E-02

-4.7000E-03

4.8000E-04

-2.0000E-05

S9

-6.8780E-02

1.2591E-01

-1.2975E-01

8.1252E-02

-3.2480E-02

8.3380E-03

-1.3300E-03

1.2100E-04

-4.8000E-06

S10

-5.8340E-02

2.6367E-02

-9.1800E-03

1.3110E-03

4.6800E-04

-2.7000E-04

5.6100E-05

-5.7000E-06

2.4700E-07

S11

-5.3310E-02

2.7461E-02

-1.3650E-02

6.4940E-03

-2.5500E-03

7.1500E-04

-1.3000E-04

1.2600E-05

-5.2000E-07

S12

-5.3900E-02

3.0747E-02

-1.2640E-02

4.1080E-03

-1.0900E-03

2.1900E-04

-3.0000E-05

2.4600E-06

-8.8000E-08

Watch 27

Fig. 42 shows on-axis chromatic aberration curves of an imaging lens of embodiment 9, which represent convergent focus shifts of light rays of different wavelengths after passing through an optical system. Fig. 43 shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 9. Fig. 44 shows distortion curves of the imaging lens of embodiment 9, which represent distortion magnitude values in the case of different angles of view. Fig. 45 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 9, which represents deviation of different image heights on an imaging surface after light passes through the imaging lens. In summary, and as can be seen with reference to fig. 41 to 45, the imaging lens according to embodiment 9 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant scene and is miniaturized.

Example 10

An imaging lens according to embodiment 10 of the present application is described below with reference to fig. 46 to 50.

Fig. 46 is a schematic diagram showing the structure of an imaging lens of embodiment 10. The imaging lens comprises a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5 and a sixth lens element E6 in sequence from the object side to the image side.

The third lens element E3 may have a negative power, and the object-side surface S5 and the image-side surface S6 may be concave.

The following table 28 shows effective focal lengths f1 to f6 of the first to sixth lenses E1 to E6, a total effective focal length f of the imaging lens, a total length TTL of the imaging lens, and a maximum half field angle HFOV (°) of the imaging lens.

f1(mm)	3.15	f(mm)	6.91
				f2(mm)	-4.97	TTL(mm)	6.38
f3(mm)	-38.03	HFOV(°)	19.5
				f4(mm)	-4.26
f5(mm)	6.80
				f6(mm)	-388.21

Watch 28

Table 29 below shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the imaging lens in this embodiment, where the unit of the radius of curvature and the thickness are both millimeters (mm).

Watch 29

Table 30 below shows high-order term coefficients of the respective aspherical surfaces S1 to S12 usable for the respective aspherical lenses in this embodiment, wherein the respective aspherical surface types can be defined by formula (1) given in example 1 above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

3.2220E-03

1.6630E-03

-2.2300E-03

5.4580E-03

-6.9100E-03

5.3320E-03

-2.4100E-03

6.1400E-04

-7.4000E-05

S2

6.2770E-03

1.5950E-02

-3.1860E-02

5.9382E-02

-8.0660E-02

7.1097E-02

-3.7370E-02

9.9010E-03

-8.8000E-04

S3

-3.0270E-02

7.7196E-02

-4.7680E-02

-1.9350E-02

1.4736E-01

-2.7160E-01

2.6804E-01

-1.4379E-01

3.2781E-02

S4

-4.9280E-02

1.0573E-01

-1.0788E-01

2.8807E-01

-5.3347E-01

5.9856E-01

-2.4563E-01

-1.1526E-01

1.0432E-01

S5

-2.1570E-02

3.6692E-02

5.1286E-02

-5.8270E-02

-7.6470E-02

4.9246E-01

-8.2880E-01

6.1991E-01

-1.7613E-01

S6

1.1294E-02

6.6305E-02

-2.4126E-01

1.0928E+00

-2.8951E+00

4.6785E+00

-4.5000E+00

2.3584E+00

-5.1659E-01

S7

-1.2467E-01

1.1159E-01

-1.6624E-01

1.6147E-01

-9.3880E-02

3.0354E-02

-3.9800E-03

-3.6000E-04

1.2400E-04

S8

-6.2710E-02

1.1559E-01

-1.6642E-01

1.4249E-01

-7.8630E-02

2.8235E-02

-6.3600E-03

8.1500E-04

-4.5000E-05

S9

-8.0310E-02

1.3298E-01

-1.2983E-01

8.1287E-02

-3.4030E-02

9.4490E-03

-1.6600E-03

1.6700E-04

-7.2000E-06

S10

-4.8460E-02

1.2709E-02

8.4260E-03

-1.3800E-02

8.6030E-03

-2.9800E-03

5.9800E-04

-6.5000E-05

2.9700E-06

S11

-5.1470E-02

1.8139E-02

5.3900E-03

-1.0490E-02

6.0440E-03

-1.8900E-03

3.3900E-04

-3.3000E-05

1.3100E-06

S12

-6.1770E-02

3.6520E-02

-1.6470E-02

6.2500E-03

-2.0100E-03

4.9200E-04

-8.1000E-05

7.7500E-06

-3.3000E-07

Watch 30

Fig. 47 shows on-axis chromatic aberration curves of the imaging lens of embodiment 10, which represent convergent focus deviations of light rays of different wavelengths after passing through an optical system. Fig. 48 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 10. Fig. 49 shows distortion curves of the imaging lens of embodiment 10, which represent distortion magnitude values in the case of different angles of view. Fig. 50 shows a chromatic aberration of magnification curve of the imaging lens of embodiment 10, which represents deviation of different image heights on an imaging surface after light passes through the imaging lens. In summary, and as can be seen with reference to fig. 46 to 50, the imaging lens according to embodiment 10 has a small depth of field and a large magnification, is an imaging lens suitable for taking a distant scene and is miniaturized.

In summary, in the above examples 1 to 10, each conditional expression satisfies the conditions of the following table 31.

Conditions/examples	1	2	3	4	5	6	7	8	9	10
											HFOV	20.0	20.0	20.0	19.0	20.0	20.0	20.0	20.0	21.0	19.5
f/f1	2.00	2.05	2.05	2.17	2.08	2.04	2.05	2.04	2.05	2.20
											TTL/f	0.96	0.96	0.96	0.91	0.96	0.96	0.96	0.96	0.99	0.92
f2/f4	1.03	0.96	1.07	1.06	1.03	1.00	0.96	0.49	1.02	1.17
											f/T34	4.69	4.68	4.60	4.78	4.65	4.65	4.70	4.71	4.63	4.70
R12/R11	1.12	1.83	0.98	0.94	1.20	1.03	0.68	0.96	1.39	0.90
											f1/R1	1.88	1.84	1.87	1.86	1.83	1.86	1.84	1.86	1.74	1.79
f2/R4	-2.07	-2.00	-1.92	-1.87	-1.88	-1.97	-2.01	-2.07	-1.49	-1.79
											CT1/T12	4.75	4.90	5.06	4.98	4.95	4.99	4.87	4.96	4.47	4.94
f/R1	3.76	3.78	3.82	4.05	3.79	3.79	3.77	3.80	3.57	3.94
											\|f/f1\|+\|f/f2\|	3.30	3.35	3.35	3.54	3.41	3.34	3.36	3.31	3.38	3.59
CT4/CT5	0.53	0.57	0.53	0.52	0.53	0.54	0.52	0.50	0.43	0.49
											T45/T56	3.69	2.84	2.77	2.52	3.20	3.33	3.85	3.02	2.33	1.54
f/f456	-0.61	-0.51	-0.57	-0.76	-0.55	-0.55	-0.54	-0.68	-0.44	-0.61
											CT5/T56	14.40	11.40	12.68	8.92	12.98	13.50	15.90	15.70	15.94	6.78
R8/R9	0.65	0.71	0.63	0.50	0.69	0.67	0.63	0.40	0.88	0.66

Watch 31

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

Claims

1. An imaging lens includes, in order from an object side to an image side:

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

a second lens having a negative optical power;

a third lens having optical power;

a fourth lens having a negative refractive power, an image-side surface of which is concave;

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

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

it is characterized in that the preparation method is characterized in that,

the maximum half field angle HFOV of the imaging lens is less than or equal to 25 degrees, and f/f1 between the effective focal length f of the imaging lens and the effective focal length f1 of the first lens is more than or equal to 2.0.

2. The imaging lens of claim 1, wherein a distance TTL/f between an on-axis distance TTL from an object side surface of the first lens element to the image plane and an effective focal length f of the imaging lens satisfies TTL ≦ 1.0.

3. The imaging lens according to claim 1, characterized in that the effective focal length f of the imaging lens and an air interval T34 on the optical axis of the third lens and the fourth lens satisfy 4.0-T/T34 <5.0.

4. The imaging lens of claim 1, wherein 0.4-f 2/f4<1.5 is satisfied between an effective focal length f2 of the second lens and an effective focal length f4 of the fourth lens.

5. An imaging lens according to any one of claims 1 to 3, characterized in that 0.5< -R12/R11 <2.0 is satisfied between a radius of curvature R12 of an image-side surface of the sixth lens and a radius of curvature R11 of an object-side surface of the sixth lens.

6. An imaging lens according to any one of claims 1 to 3, wherein 1.0-t 1/R1<2.0 is satisfied between the effective focal length f1 of the first lens and the radius of curvature R1 of the object-side surface of the first lens.

7. An imaging lens according to any one of claims 1 to 3, wherein-2.5-t 2/R4< -1.0 is satisfied between the effective focal length f2 of the second lens and the radius of curvature R4 of the image side surface of the second lens.

8. The imaging lens according to any one of claims 1 to 3, characterized in that 4.0-T/T12 <5.5 is satisfied between a center thickness CT1 of the first lens and an air interval T12 of the first lens and the second lens on the optical axis.

9. The imaging lens assembly of any one of claims 1 to 3 wherein the effective focal length f of the optical imaging lens group and the radius of curvature R1 of the object side surface of the first lens element satisfy 3.5-woven fabric f/R1<4.5.

10. The imaging lens of claim 1, wherein the effective focal length f of the imaging lens, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 3.0< | f/f1| + | f/f2| <4.0.

11. The imaging lens according to any one of claims 1 to 3 and 10, characterized in that 0-t ct4/CT5<1.0 is satisfied between a center thickness CT4 of the fourth lens and a center thickness CT5 of the fifth lens.

12. An imaging lens according to any one of claims 1 to 3 and 10, wherein an air interval T45 of the fourth lens and the fifth lens on the optical axis and an air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy 1.5T 45/T56<4.0.

13. The imaging lens of claim 2, characterized in that-0.9 and f/f456< -0.3 are satisfied between an effective focal length f of the imaging lens and a combined focal length f456 of the fourth lens, the fifth lens and the sixth lens.

14. The imaging lens according to any one of claims 1 to 3 and 13, characterized in that 6.0-and-a-ct5/T56 <20.0 are satisfied between a center thickness CT5 of the fifth lens and an air interval T56 of the fifth lens and the sixth lens on the optical axis.

15. An imaging lens according to any one of claims 1 to 3 and 13, wherein a radius of curvature R8 of the image-side surface of the fourth lens and a radius of curvature R9 of the object-side surface of the fifth lens satisfy 0-t R8/R9<1.0.

16. An imaging lens includes, in order from an object side to an image side:

a second lens having a negative optical power;

a third lens having optical power;

it is characterized in that the preparation method is characterized in that,

0.4< -f2/f 4<1.5 is satisfied between an effective focal length f2 of the second lens and an effective focal length f4 of the fourth lens, and the maximum half field angle HFOV of the imaging lens is equal to or less than 25 °.

17. The imaging lens assembly of claim 16, wherein an on-axis distance TTL from an object-side surface of the first lens element to the imaging surface satisfies TTL/f ≦ 1.0 between the TTL and an effective focal length f of the imaging lens assembly.

18. An imaging lens according to claim 16, characterized in that an effective focal length f of the imaging lens and an air interval T34 on the optical axis of the third lens and the fourth lens satisfy 4.0-f/T34 <5.0.

19. The imaging lens of claim 17, wherein f/f1 is greater than or equal to 2.0 between the effective focal length f of the imaging lens and the effective focal length f1 of the first lens.

20. An imaging lens according to any one of claims 16 to 18, wherein a radius of curvature R12 of the image-side surface of the sixth lens and a radius of curvature R11 of the object-side surface of the sixth lens satisfy 0.5-t R12/R11<2.0.

21. The imaging lens according to any one of claims 16 to 18, wherein 1.0-f 1/R1<2.0 is satisfied between an effective focal length f1 of the first lens and a radius of curvature R1 of an object-side surface of the first lens.

22. An imaging lens according to any one of claims 16 to 18, wherein-2.5-f 2/R4< -1.0 is satisfied between the effective focal length f2 of the second lens and the radius of curvature R4 of the image side surface of the second lens.

23. The imaging lens according to any one of claims 16 to 18, characterized in that 4.0-T1/T12 <5.5 is satisfied between a center thickness CT1 of the first lens and an air interval T12 of the first lens and the second lens on the optical axis.

24. The imaging lens assembly of any one of claims 16 to 18 wherein 3.5-woven f/R1<4.5 is satisfied between the effective focal length f of the optical imaging lens group and the radius of curvature R1 of the object side surface of the first lens element.

25. The imaging lens of claim 16, wherein the effective focal length f of the imaging lens, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 3.0< | f/f1| + | f/f2| <4.0.

26. The imaging lens according to any one of claims 16 to 18 and 25, wherein 0-straw ct4/CT5<1.0 is satisfied between a central thickness CT4 of the fourth lens and a central thickness CT5 of the fifth lens.

27. An imaging lens according to any one of claims 16 to 18 and 25, wherein an air interval T45 of the fourth lens and the fifth lens on the optical axis and an air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy 1.5-T45/T56 <4.0.

28. An imaging lens according to claim 16, wherein an effective focal length f of the imaging lens and a combined focal length f456 of the fourth lens, the fifth lens and the sixth lens satisfy-0.9-t/f 456< -0.3.

29. The imaging lens according to any one of claims 16 to 18 and 28, characterized in that 6.0-straw ct5/T56<20.0 is satisfied between a center thickness CT5 of the fifth lens and an air interval T56 of the fifth lens and the sixth lens on the optical axis.

30. An imaging lens according to any one of claims 16 to 18 and 28, wherein a radius of curvature R8 of the image-side surface of the fourth lens and a radius of curvature R9 of the object-side surface of the fifth lens satisfy 0-t R8/R9<1.0.

31. An imaging lens includes, in order from an object side to an image side:

a second lens having a negative optical power;

a third lens having optical power;

it is characterized in that the preparation method is characterized in that,

the maximum half field angle HFOV of the imaging lens is less than or equal to 25 degrees, and the effective focal length f of the imaging lens and the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens meet the condition that the number of the f/f456 is less than-0.3.

32. The imaging lens of claim 31, wherein f/f1 is greater than or equal to 2.0 between the effective focal length f of the imaging lens and the effective focal length f1 of the first lens.

33. The imaging lens assembly of claim 31, wherein an on-axis distance TTL from an object-side surface of the first lens element to the imaging surface satisfies TTL/f ≦ 1.0 between the TTL and an effective focal length f of the imaging lens assembly.

34. An imaging lens according to claim 32, wherein 0.4 and-f 2/f4<1.5 are satisfied between an effective focal length f2 of the second lens and an effective focal length f4 of the fourth lens.

35. An imaging lens according to any one of claims 31 to 33, wherein an effective focal length f of the imaging lens and an air interval T34 on the optical axis of the third lens and the fourth lens satisfy 4.0 and f/T34<5.0.

36. An imaging lens according to any one of claims 31 to 33, wherein 0.5-rn R12/R11<2.0 is satisfied between a radius of curvature R12 of the image-side surface of the sixth lens and a radius of curvature R11 of the object-side surface of the sixth lens.

37. An imaging lens according to any one of claims 31 to 33, wherein 1.0-t 1/R1<2.0 is satisfied between an effective focal length f1 of the first lens and a radius of curvature R1 of an object-side surface of the first lens.

38. An imaging lens according to any one of claims 31 to 33, wherein an effective focal length f2 of the second lens and a radius of curvature R4 of an image-side surface of the second lens satisfy-2.5 < -f 2/R4< -1.0.

39. The imaging lens according to any one of claims 31 to 33, wherein 4.0-T1/T12 <5.5 is satisfied between a center thickness CT1 of the first lens and an air interval T12 of the first lens and the second lens on the optical axis.

40. The imaging lens assembly of any one of claims 31 to 33 wherein the effective focal length f of the optical imaging optic group and the radius of curvature R1 of the object side surface of the first lens element satisfy 3.5-straw f/R1<4.5.

41. The imaging lens of claim 31, wherein the effective focal length f of the imaging lens, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 3.0< | f/f1| + | f/f2| <4.0.

42. The imaging lens according to any one of claims 31 to 33 and 41, wherein 0-straw CT4/CT5<1.0 is satisfied between a central thickness CT4 of the fourth lens and a central thickness CT5 of the fifth lens.

43. An imaging lens according to any one of claims 31 to 33 and 41, wherein an air interval T45 of the fourth lens and the fifth lens on the optical axis and an air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy 1.5T 45/T56<4.0.

44. The imaging lens of any one of claims 31 to 33 and 41, wherein 6.0-and-T5/T56 <20.0 is satisfied between a center thickness CT5 of the fifth lens and an air interval T56 of the fifth lens and the sixth lens on the optical axis.

45. An imaging lens according to any one of claims 31 to 33 and 41, wherein a radius of curvature R8 of the image-side surface of the fourth lens and a radius of curvature R9 of the object-side surface of the fifth lens satisfy 0-R8/R9 <1.0.