CN114637096B

CN114637096B - Image pickup lens group

Info

Publication number: CN114637096B
Application number: CN202210243450.8A
Authority: CN
Inventors: 张骞; 胡亚斌; 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: 2022-03-11
Filing date: 2022-03-11
Publication date: 2024-06-14
Anticipated expiration: 2042-03-11
Also published as: CN114637096A

Abstract

The invention provides an imaging lens group. The image capturing lens assembly includes, from an object side to an image side: a first lens having optical power; a second lens having optical power; the object side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having optical power; a sixth lens having optical power; the center thickness of the first lens is greater than the center thickness of any one of the second lens to the sixth lens; air spaces are arranged among the lenses; the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens assembly and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH <1.3; the effective focal length f4 of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: -3.5< R7/f4< -1.0. The invention solves the problem of poor imaging quality of the shooting lens group in the prior art.

Description

Image pickup lens group

Technical Field

The invention relates to the technical field of optical imaging equipment, in particular to an imaging lens group.

Background

With the development of the age, the camera module takes up an increasingly important position on the smart phone. There is no longer a requirement for "taking a shadow" but an increasing requirement for imaging quality. In the scenes of actual use, the front lens is more self-timer, the ambient light is mostly natural light, and many scenes with insufficient light exist, so that the shooting quality is poor.

That is, the imaging lens group in the related art has a problem of poor imaging quality.

Disclosure of Invention

The invention mainly aims to provide an imaging lens group so as to solve the problem that the imaging quality of the imaging lens group in the prior art is poor.

In order to achieve the above object, according to one aspect of the present invention, there is provided an image pickup lens group including, from an object side to an image side: a first lens having optical power; a second lens having optical power; the object side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having optical power; a sixth lens having optical power; the center thickness of the first lens is greater than the center thickness of any one of the second lens to the sixth lens; air spaces are arranged among the lenses; the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens assembly and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH <1.3; the effective focal length f4 of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: -3.5< R7/f4< -1.0.

Further, the effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group satisfy: f/EPD is less than or equal to 2.1.

Further, the maximum field angle FOV of the imaging lens group satisfies: FOV >90 °.

Further, the effective focal length f of the image pickup lens group and the effective focal length f2 of the second lens satisfy: 2.0 < f2/f < 3.5.

Further, the curvature radius R1 of the object side surface of the first lens and the effective focal length f1 of the first lens satisfy: 1.5 < f1/R1 < 3.0.

Further, the effective focal length f3 of the third lens and the radius of curvature R5 of the object side surface of the third lens satisfy: 0.5 < f3/R5 < 2.0.

Further, the curvature radius R5 of the object side surface of the third lens and the curvature radius R9 of the object side surface of the fifth lens satisfy: 1.0 < |R9/R5| < 6.5.

Further, the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f4 of the fourth lens satisfy: -2.5 < f4/R8 < -2.0.

Further, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -5.5 < |f5|/f6 < -1.5.

Further, the effective focal length f6 of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens satisfy: -5.5 < f6/R12 < -1.5.

Further, the air interval T12 of the first lens and the second lens on the optical axis of the image pickup lens group, the air interval T34 of the third lens and the fourth lens on the optical axis satisfy: T12/T34 is more than 0.5 and less than 6.0.

Further, the fourth lens satisfies between a center thickness CT4 on the optical axis of the image pickup lens group and an edge thickness ET4 of the fourth lens: CT4/ET4 is more than 1.5 and less than 2.5.

Further, an on-axis distance SAG61 between an intersection point of the object side surface of the sixth lens and the optical axis of the image pickup lens group and an axial point between an effective radius vertex of the object side surface of the sixth lens and an edge thickness ET6 of the sixth lens satisfy-2.0 < SAG61/ET6 < -0.5.

Further, the combined focal length f34 of the third lens and the fourth lens and the effective focal length f of the image capturing lens group satisfy: 0.5 < f34/f < 2.0.

Further, the combined focal length f12 of the first lens and the second lens, and the combined focal length f56 of the fifth lens and the sixth lens satisfy: -2.0 < f12/f56 < -0.5.

Further, an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis of the image capturing lens group and an axis point between the effective radius vertex of the image side surface of the sixth lens and an on-axis distance SAG42 between an intersection point of the image side surface of the fourth lens and the optical axis of the image capturing lens group and an axis point between the effective radius vertex of the image side surface of the fourth lens satisfies: 0.8 < SAG62/SAG42 < 2.0.

According to another aspect of the present invention, there is provided an image pickup lens group including, from an object side to an image side: a first lens having optical power; a second lens having optical power; the object side surface of the third lens is a concave surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having optical power; a sixth lens having optical power; the center thickness of the first lens is greater than the center thickness of any one of the second lens to the sixth lens; air spaces are arranged among the lenses; the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens assembly and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH <1.3; the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f4 of the fourth lens satisfy: -2.5 < f4/R8 < -2.0.

By applying the technical scheme of the invention, the image pickup lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side. The first lens has optical power; the second lens has optical power; the third lens has negative focal power, and the object side surface of the third lens is a concave surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has optical power; the sixth lens has optical power; the center thickness of the first lens is greater than the center thickness of any one of the second lens to the sixth lens; air spaces are arranged among the lenses; the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens assembly and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH <1.3; the effective focal length f4 of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: -3.5< R7/f4< -1.0.

By distributing the focal power of part of the lenses of the image pickup lens group and designing the surface type of the lenses, the low-order aberration of the image pickup lens group can be effectively balanced, the sensitivity of the tolerance of the image pickup lens group can be reduced, the miniaturization of the image pickup lens group is kept, and the imaging quality of the image pickup lens group is ensured. By limiting TTL/ImgH within a reasonable range, the size of an image plane can be improved, the imaging quality of the imaging lens group can be improved, meanwhile, the length of the imaging lens group is compressed, the space occupation ratio of the imaging lens group is reduced, and the user experience is improved. By limiting R7/f4 within a reasonable range, the radius of curvature of the object side surface of the fourth lens is reasonably distributed, and the difficulty of the processing technology is controlled within a reasonable range, so that the fourth lens can be processed conveniently. Meanwhile, the deflection degree of light rays in the fourth lens is limited, the sensitivity of the fourth lens is reduced, and the production yield of the fourth lens is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 is a schematic diagram showing a configuration of an image pickup lens group according to an example one of the present invention;

fig. 2 to 4 show on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the image pickup lens group in fig. 1, respectively;

fig. 5 is a schematic diagram showing the structure of an image pickup lens group according to example two of the present invention;

fig. 6 to 8 show on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the image pickup lens group in fig. 5, respectively;

fig. 9 is a schematic diagram showing the structure of an image pickup lens group of example three of the present invention;

Fig. 10 to 12 show on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the image pickup lens group in fig. 9, respectively;

Fig. 13 is a schematic diagram showing the structure of an image pickup lens group of example four of the present invention;

fig. 14 to 16 show on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the image pickup lens group in fig. 13, respectively;

fig. 17 is a schematic diagram showing the configuration of an image pickup lens group of example five of the present invention;

fig. 18 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve of the image pickup lens group in fig. 17, respectively.

Wherein the above figures include the following reference numerals:

STO and diaphragm; e1, a first lens; s1, an object side surface of a first lens; s2, an image side surface of the first lens; e2, a second lens; s3, the object side surface of the second lens; s4, an image side surface of the second lens; e3, a third lens; s5, the object side surface of the third lens is provided; s6, an image side surface of the third lens; e4, a fourth lens; s7, an object side surface of the fourth lens; s8, an image side surface of the fourth lens is provided; e5, a fifth lens; s9, an object side surface of the fifth lens; s10, an image side surface of the fifth lens; e6, a sixth lens; s11, an object side surface of the sixth lens; s12, an image side surface of the sixth lens; e7, a filter; s13, the object side surface of the filter; s14, the image side surface of the filter; s15, an imaging surface.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all 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 unless otherwise indicated.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.

It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. Specifically, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are 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, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be performed by a determination method by a person skilled in the art by positive or negative determination of the concave-convex with R value (R means the radius of curvature of the paraxial region, and generally means the R value on a lens database (lens data) in optical software). In the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the image side, the concave surface is determined when the R value is positive, and the convex surface is determined when the R value is negative.

The invention provides an imaging lens group, which aims to solve the problem of poor imaging quality of the imaging lens group in the prior art.

Example 1

As shown in fig. 1 to 20, the image capturing lens group includes, from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has optical power; the second lens has optical power; the third lens has negative focal power, and the object side surface of the third lens is a concave surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has optical power; the sixth lens has optical power; the center thickness of the first lens is greater than the center thickness of any one of the second lens to the sixth lens; air spaces are arranged among the lenses; the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens assembly and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH <1.3; the effective focal length f4 of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: -3.5< R7/f4< -1.0.

Preferably, the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens assembly is equal to half of the diagonal length ImgH of the effective pixel area on the imaging surface: 1.1< TTL/ImgH <1.3. The effective focal length f4 of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: -3.3< R7/f4< -1.1. In the present embodiment, the effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group satisfy: f/EPD is less than or equal to 2.1. The ratio of the effective focal length to the entrance pupil diameter of the camera lens group is controlled, so that the camera lens group can acquire enough luminous flux, enough illumination intensity at an image surface is ensured, the imaging quality in a weak light environment is optimized, and the imaging quality of the camera lens group is improved. Preferably, 1.3< f/EPD.ltoreq.2.1.

In the present embodiment, the maximum field angle FOV of the imaging lens group satisfies: FOV >90 °. The shooting lens group in the embodiment is used for shooting forward, and the maximum field angle is limited within the range of more than 90 degrees, so that more scene pictures can be contained under the common distance of 'one arm length', the shooting lens group is suitable for multiple people and the experience effect of a user is improved. Preferably, 90 ° < FOV < 98 °.

In the present embodiment, the effective focal length f of the image pickup lens group and the effective focal length f2 of the second lens satisfy: 2.0 < f2/f < 3.5. The effective focal length of the second lens is reasonably configured, so that the sensitivity of the second lens can be effectively reduced, spherical aberration, chromatic aberration and astigmatism generated by the second lens are balanced, and meanwhile, the tolerance sensitivity is reduced. Preferably, 2.1 < f2/f < 3.4.

In the present embodiment, the curvature radius R1 of the object side surface of the first lens and the effective focal length f1 of the first lens satisfy: 1.5 < f1/R1 < 3.0. The ratio of the effective focal length to the curvature radius of the first lens is reasonably configured, so that the TTL of the image pickup lens group can be controlled within a reasonable range, and meanwhile, the spherical aberration of the image pickup lens group is reduced. The tolerance sensitivity of the first lens is reduced, and the processing difficulty is reduced. Preferably, 1.7 < f1/R1 < 2.8.

In the present embodiment, the effective focal length f3 of the third lens and the radius of curvature R5 of the object side surface of the third lens satisfy: 0.5 < f3/R5 < 2.0. The effective focal length of the third lens is reasonably configured, so that the sensitivity of the third lens can be effectively reduced, the excessively strict tolerance requirement is avoided, the spherical aberration, chromatic aberration and astigmatism generated by the third lens can be balanced, and the imaging quality of the camera lens group is ensured. Preferably, 0.6 < f3/R5 < 1.9.

In the present embodiment, the curvature radius R5 of the object side surface of the third lens and the curvature radius R9 of the object side surface of the fifth lens satisfy: 1.0 < |R9/R5| < 6.5. And curvature radiuses of the third lens and the fifth lens are balanced, and the lens section differences are reasonably distributed, so that marginal light transition of the camera lens group is stable, and the imaging quality of an external visual field is improved. Preferably, 1.05 < |R9/R5| < 6.45.

In the present embodiment, the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f4 of the fourth lens satisfy: -2.5 < f4/R8 < -2.0. The ratio of the curvature radius of the image side surface of the fourth lens to the effective focal length is controlled, so that the aberration contribution of the fourth lens can be controlled, the chromatic aberration of magnification of the image pickup lens group is reduced, and the imaging quality of the image pickup lens group is improved. Preferably, -2.5 < f4/R8 < -2.1.

In the present embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -5.5 < |f5|/f 6< -1.5. The ratio of the effective focal lengths of the fifth lens and the sixth lens is reasonably distributed, so that the problems of distortion, astigmatism and the like of the whole image pickup lens group can be well balanced. In addition, a larger image surface can be obtained by controlling the ratio, and the larger image surface is matched, so that the image pickup lens group has higher image quality. Preferably, -5.3 < |f5|/f6 < -1.7.

In the present embodiment, the effective focal length f6 of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens satisfy: -5.5 < f6/R12 < -1.5. The ratio of the focal length to the curvature radius of the sixth lens is reasonably distributed, so that the performance difference of the object distance between infinity and finite distance can be reduced, and the imaging quality can be improved. Preferably, -5.4 < f6/R12 < -1.7.

In the present embodiment, the air interval T12 of the first lens and the second lens on the optical axis of the image pickup lens group, the air interval T34 of the third lens and the fourth lens on the optical axis satisfy: T12/T34 is more than 0.5 and less than 6.0. And the air interval between the first lens and the second lens is reasonably distributed, and the air interval between the third lens and the fourth lens is increased, so that the field curvature sensitivity of the two intervals is improved, and the field curvature offset problem caused by surface type errors in the actual production process is favorably corrected. Preferably, 0.7 < T12/T34 < 5.9.

In the present embodiment, the fourth lens satisfies between the center thickness CT4 on the optical axis of the image pickup lens group and the edge thickness ET4 of the fourth lens: CT4/ET4 is more than 1.5 and less than 2.5. The middle thickness and the side thickness of the fourth lens are reasonably distributed, so that on one hand, the coma aberration and the astigmatism of the shooting lens group can be reduced, and the optical performance is improved. On the other hand, the shape of the fourth lens can be controlled, the molding difficulty is reduced, and the product yield is improved. Preferably, 1.55 < CT4/ET4 < 2.4.

In the present embodiment, an on-axis distance SAG61 between an intersection point of the object side surface of the sixth lens and the optical axis of the image pickup lens group and an axial point between an effective radius vertex of the object side surface of the sixth lens and an edge thickness ET6 of the sixth lens satisfy-2.0 < SAG61/ET6 < -0.5. The proportion of the sagittal height and the edge thickness of the sixth lens is controlled, the manufacturability of the lens can be ensured, the incidence angle of the chief ray on the image plane can be adjusted to be within a reasonable range, the light energy utilization rate of the imaging chip is improved, and the ghost image risk is reduced. Preferably, -1.8 < SAG61/ET6 < -0.7.

In the present embodiment, the combined focal length f34 of the third lens and the fourth lens and the effective focal length f of the image capturing lens group satisfy: 0.5 < f34/f < 2.0. The ratio of the combined focal length of the third lens and the fourth lens of the image pickup lens group to the effective focal length of the image pickup lens group is controlled, the contribution of the third lens and the fourth lens to the whole image pickup lens group can be controlled, the contribution of the third lens and the fourth lens is controlled in a reasonable range, and the optical aberration such as spherical aberration, coma aberration and the like of the image pickup lens group can be reduced. Preferably, 0.7 < f34/f < 1.95.

In the present embodiment, the combined focal length f12 of the first lens and the second lens, and the combined focal length f56 of the fifth lens and the sixth lens satisfy: -2.0 < f12/f56 < -0.5. The ratio of the combined focal lengths of the front lens and the rear lens of the image pickup lens group is controlled, so that the corrected optical aberration is uniformly distributed to each lens, the sensitivity of a single lens is reduced, and the imaging quality is improved. Preferably, -1.8 < f12/f56 < -0.7.

In the present embodiment, an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis of the image capturing lens group and an axial point between the effective radius vertex of the image side surface of the sixth lens and an axial point between an intersection point of the image side surface of the fourth lens and the optical axis of the image capturing lens group and the effective radius vertex of the image side surface of the fourth lens and an axial distance SAG42 between them satisfy: 0.8 < SAG62/SAG42 < 2.0. By restricting the sagittal relation between the sixth lens and the fourth lens, the shapes of the sixth lens and the fourth lens can be improved, the focal power can be reasonably distributed, and the chromatic aberration and distortion field curvature of the image pickup lens group can be improved. The shape of the lens is changed, so that the ghost generated by the fourth lens and the sixth lens is improved, and the picture quality is improved. Preferably, 1 < SAG62/SAG42 < 1.8.

Example two

As shown in fig. 1 to 20, the image capturing lens group includes, from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has optical power; the second lens has optical power; the third lens has negative focal power, and the object side surface of the third lens is a concave surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has optical power; the sixth lens has optical power; the center thickness of the first lens is greater than the center thickness of any one of the second lens to the sixth lens; air spaces are arranged among the lenses; the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens assembly and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH <1.3; the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f4 of the fourth lens satisfy: -2.5 < f4/R8 < -2.0.

By distributing the focal power of part of the lenses of the image pickup lens group and designing the surface type of the lenses, the low-order aberration of the image pickup lens group can be effectively balanced, the sensitivity of the tolerance of the image pickup lens group can be reduced, the miniaturization of the image pickup lens group is kept, and the imaging quality of the image pickup lens group is ensured. By limiting TTL/ImgH within a reasonable range, the size of an image plane can be improved, the imaging quality of the imaging lens group can be improved, meanwhile, the length of the imaging lens group is compressed, the space occupation ratio of the imaging lens group is reduced, and the user experience is improved. The ratio of the curvature radius of the image side surface of the fourth lens to the effective focal length is controlled, so that the aberration contribution of the fourth lens can be controlled, the chromatic aberration of magnification of the image pickup lens group is reduced, and the imaging quality of the image pickup lens group is improved.

Preferably, the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the image capturing lens assembly is equal to half of the diagonal length ImgH of the effective pixel area on the imaging surface: 1.1< TTL/ImgH <1.3. The curvature radius R8 of the image side surface of the fourth lens and the effective focal length f4 of the fourth lens satisfy: -2.5 < f4/R8 < -2.1.

In the present embodiment, the effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group satisfy: f/EPD is less than or equal to 2.1. The ratio of the effective focal length to the entrance pupil diameter of the camera lens group is controlled, so that the camera lens group can acquire enough luminous flux, enough illumination intensity at an image surface is ensured, the imaging quality in a weak light environment is optimized, and the imaging quality of the camera lens group is improved. Preferably, 1.3< f/EPD.ltoreq.2.1.

In the present embodiment, an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis of the image capturing lens group and an axial point between the effective radius vertex of the image side surface of the sixth lens and an axial point between an intersection point of the image side surface of the fourth lens and the optical axis of the image capturing lens group and the effective radius vertex of the image side surface of the fourth lens and an axial distance SAG42 between them satisfy: 0.8 < SAG62/SAG42 < 2.0. By restricting the sagittal relation between the sixth lens and the fourth lens, the shapes of the sixth lens and the fourth lens can be improved, the focal power can be reasonably distributed, and the chromatic aberration and distortion field curvature of the image pickup lens group can be improved. The shape of the lens is changed, so that the ghost generated by the fourth lens and the sixth lens is improved, and the picture quality is improved. Preferably, 1 < SAG62/SAG42 < 1.8. Optionally, the image pickup lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.

The image pickup lens group in the present application may employ a plurality of lenses, for example, the six lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like of each lens, the imaging quality of the imaging lens group can be effectively increased, the sensitivity of the imaging lens group is reduced, and the processability of the imaging lens group is improved, so that the imaging lens group is more beneficial to production and processing and is applicable to portable electronic equipment such as smart phones and the like.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspherical 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 a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses making up the imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the scope of the application as claimed. For example, although six lenses are described as an example in the embodiment, the imaging lens group is not limited to include six lenses. The imaging lens group may also include other numbers of lenses, if desired.

Examples of specific surface types and parameters applicable to the image pickup lens groups of the above embodiments are further described below with reference to the drawings.

It should be noted that any of the following examples one to five is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 4, an imaging lens group according to an example of the present application is described. Fig. 1 shows a schematic configuration of an imaging lens group of example one.

As shown in fig. 1, the image capturing lens assembly sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

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

In this example, the image height ImgH of the imaging lens group is 3.43mm. The total length TTL of the imaging lens group is 4.35mm.

Table 1 shows a basic structural parameter table of an imaging lens group of example one, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 1

In the first example, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspheric, and the surface shape of each aspheric lens element can be defined by, but not limited to, the following aspheric equation. :

Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height 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 a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The following Table 2 shows the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, 30 that can be used for each of the aspherical mirrors S1-S12 in example one.

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TABLE 2

Fig. 2 shows an on-axis chromatic aberration curve of the image pickup lens group of example one, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the image pickup lens group. Fig. 3 shows an astigmatism curve of the imaging lens group of example one, which indicates meridional image surface curvature and sagittal image surface curvature. Fig. 4 shows distortion curves of the image pickup lens group of example one, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 2 to 4, the image capturing lens assembly according to the example can achieve good imaging quality.

Example two

As shown in fig. 5 to 8, an imaging lens group according to an example two of the present application is described. Fig. 5 shows a schematic configuration of an imaging lens group of example two.

As shown in fig. 5, the image capturing lens assembly sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

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

Table 3 shows a basic structural parameter table of an imaging lens group of example two, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 3 Table 3

Table 4 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example two, where each of the aspherical surface types can be defined by equation (1) given in example one above.

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TABLE 4 Table 4

Fig. 6 shows an on-axis chromatic aberration curve of the image pickup lens group of example two, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the image pickup lens group. Fig. 7 shows an astigmatism curve of the imaging lens group of example two, which indicates meridional image surface curvature and sagittal image surface curvature. Fig. 8 shows distortion curves of the image pickup lens group of example two, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 6 to 8, the imaging lens group of the second example can achieve good imaging quality.

Example three

As shown in fig. 9 to 12, an imaging lens group of example three of the present application is described. Fig. 9 shows a schematic configuration of an imaging lens group of example three.

As shown in fig. 9, the image capturing lens assembly includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

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

Table 5 shows a basic structural parameter table of the image pickup lens group of example three, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

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TABLE 5

Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example three, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-3.8191E-03

-3.4742E-04

-2.0590E-04

3.8713E-05

-3.5526E-05

1.6405E-05

-1.0523E-05

S2

-1.6882E-02

-6.2723E-03

-1.7554E-04

7.6361E-05

8.5651E-05

3.1438E-05

1.0485E-05

S3

-6.3742E-02

-1.0191E-02

-1.0148E-03

1.5325E-05

1.4331E-04

5.5692E-05

2.3228E-05

S4

-1.5001E-01

-1.2211E-02

1.4797E-03

5.3769E-04

6.7455E-04

2.4634E-04

1.1607E-05

S5

-2.3232E-01

1.0418E-02

4.4555E-03

-2.7402E-04

4.2065E-04

3.1590E-04

-1.7103E-04

S6

-2.6288E-01

2.8413E-02

7.6509E-03

1.3253E-03

5.0441E-04

5.2773E-04

-3.1154E-04

S7

2.0436E-02

-1.0438E-01

-1.9039E-02

2.3410E-02

-7.5978E-03

5.0835E-03

-3.0851E-03

S8

8.1431E-01

-2.5373E-01

4.2289E-02

7.4298E-03

-1.8614E-02

4.5046E-03

-3.8227E-04

S9

-4.4201E-01

-1.2063E-01

1.3683E-01

-3.7942E-02

-7.2604E-03

-4.1323E-03

5.9568E-03

S10

-1.1190E+00

2.5822E-02

1.2333E-01

-3.1629E-02

3.5572E-03

-4.4838E-03

2.0394E-03

S11

-1.6906E+00

6.9242E-01

-2.2518E-01

6.8920E-02

-2.7698E-02

1.0925E-02

-3.3879E-03

S12

-2.0341E+00

3.9963E-01

-1.5956E-01

1.0921E-01

-3.9569E-02

1.0940E-02

-2.9007E-04

Face number

A18

A20

A22

A24

A26

A28

A30

S1

7.7656E-06

-6.1314E-06

2.2570E-06

-1.0737E-06

2.4620E-06

-1.7958E-06

0.0000E+00

S2

1.6442E-06

-1.5084E-06

0.0000E+00

S3

5.9061E-06

3.7005E-06

-5.4354E-07

2.5576E-07

-1.8893E-06

0.0000E+00

S4

-5.2949E-05

-1.6150E-05

-9.0167E-06

2.0976E-06

0.0000E+00

S5

-1.4270E-04

-4.0537E-05

0.0000E+00

S6

-1.1887E-04

-1.5061E-05

-7.9639E-06

5.6741E-06

0.0000E+00

S7

1.6682E-04

-2.8305E-04

1.0512E-04

7.5362E-05

0.0000E+00

S8

2.2742E-04

5.2179E-04

-3.2733E-04

-5.6800E-05

2.3866E-04

-8.5014E-05

0.0000E+00

S9

3.1094E-04

-1.2530E-03

6.9518E-04

2.3085E-04

-8.3352E-05

-1.5753E-04

4.3060E-05

S10

-1.7825E-03

-2.3091E-03

1.3108E-03

4.9290E-04

4.4052E-04

-2.3206E-04

-6.4245E-05

S11

-1.1215E-03

-4.0677E-04

3.2963E-03

-3.2239E-03

9.0896E-04

3.3106E-04

-1.7781E-04

S12

2.7583E-03

-5.7093E-03

-8.8668E-04

-1.9907E-03

7.8755E-04

2.7701E-04

5.5564E-04

TABLE 6

Fig. 10 shows an on-axis chromatic aberration curve of the image pickup lens group of example three, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the image pickup lens group. Fig. 11 shows an astigmatism curve of the imaging lens group of example three, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 12 shows distortion curves of the imaging lens group of example three, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 10 to 12, the imaging lens group given in example three can achieve good imaging quality.

Example four

As shown in fig. 13 to 16, an imaging lens group of example four of the present application is described. Fig. 13 shows a schematic configuration of an imaging lens group of example four.

As shown in fig. 13, the image capturing lens assembly includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

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

In this example, the image height ImgH of the imaging lens group is 3.43mm. The total length TTL of the imaging lens group is 4.34mm.

Table 7 shows a basic structural parameter table of an imaging lens group of example four, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 7

Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example four, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

1.0992E-02

-5.9977E-04

-1.9806E-04

5.2732E-05

-3.5850E-05

1.8271E-05

-1.1420E-05

S2

-2.3164E-02

-6.7003E-03

7.5911E-04

1.4401E-04

9.8806E-05

6.2475E-06

-4.9364E-06

S3

-7.4436E-02

-1.3409E-02

1.2634E-03

7.2857E-04

1.6857E-04

3.9547E-06

-2.3428E-05

S4

-1.2848E-01

-2.1871E-02

3.8950E-03

1.3934E-03

-1.2526E-04

-3.2390E-04

5.0792E-06

S5

-1.6308E-01

1.3985E-02

8.5574E-03

7.4585E-04

-5.6148E-04

-1.2026E-03

3.9730E-04

S6

-2.7135E-01

2.7774E-02

2.3734E-02

-5.2095E-03

2.0502E-03

-1.9722E-03

1.6653E-03

S7

-6.7375E-03

-9.2330E-02

2.1093E-02

-4.7204E-03

5.2358E-03

-1.0844E-03

2.0750E-03

S8

5.4615E-01

-1.3768E-01

4.1586E-02

-2.0476E-03

-6.9779E-03

2.9600E-03

-1.2488E-03

S9

-1.5047E-01

-1.8241E-01

1.1115E-01

-1.6343E-02

-3.4984E-03

2.1665E-03

-1.8741E-03

S10

-2.9594E-02

-2.3715E-01

1.3785E-01

-5.3984E-02

1.5594E-02

-2.2045E-03

-2.3135E-03

S11

-8.2798E-01

2.7443E-01

-6.2563E-02

9.4392E-03

2.1023E-03

-8.2379E-03

8.3301E-03

S12

-1.6362E+00

2.3733E-01

-6.3358E-02

3.3596E-02

2.6013E-03

-3.8137E-03

7.3749E-04

Face number

A18

A20

A22

A24

A26

A28

A30

S1

5.6083E-06

-5.7299E-06

2.8722E-06

0.0000E+00

S2

-1.3222E-05

-8.2000E-06

-6.3425E-06

0.0000E+00

S3

2.6739E-06

-1.0323E-05

0.0000E+00

S4

1.7024E-05

2.9117E-05

0.0000E+00

S5

1.0051E-04

3.1051E-05

-6.3104E-05

-2.1627E-05

8.5481E-06

5.5693E-06

8.4387E-06

S6

-3.1956E-04

7.9823E-05

-1.6389E-04

0.0000E+00

S7

-1.0332E-03

1.5543E-04

-2.8233E-04

3.1394E-05

0.0000E+00

S8

1.0042E-03

-4.7187E-04

2.1704E-04

-2.7817E-05

0.0000E+00

S9

1.9837E-03

-7.0199E-04

1.2222E-05

-1.6744E-04

1.9507E-04

3.6070E-06

-2.5542E-05

S10

3.1177E-03

-1.6323E-03

5.7417E-04

-2.3724E-04

2.3983E-05

-4.5901E-05

2.6363E-06

S11

-3.6005E-03

8.4134E-04

-6.9757E-04

6.5054E-04

-2.5805E-04

-1.9600E-05

3.3576E-05

S12

-1.8150E-03

1.6568E-03

-1.5641E-04

5.0214E-04

-3.4159E-04

1.7066E-04

-1.2739E-04

TABLE 8

Fig. 14 shows an on-axis chromatic aberration curve of the image pickup lens group of example four, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the image pickup lens group. Fig. 15 shows an astigmatism curve of the imaging lens group of example four, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 16 shows distortion curves of the imaging lens group of example four, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 14 to 16, the imaging lens group given in example four can achieve good imaging quality.

Example five

As shown in fig. 17 to 20, an imaging lens group of example five of the present application is described. Fig. 17 shows a schematic configuration of an imaging lens group of example five.

As shown in fig. 17, the image capturing lens assembly includes, in order from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

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

In this example, the image height ImgH of the imaging lens group is 3.41mm. The total length TTL of the imaging lens group is 4.35mm.

Table 9 shows a basic structural parameter table of an imaging lens group of example five, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 9

Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example five, where each of the aspherical surface types can be defined by equation (1) given in example one above.

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Table 10

Fig. 18 shows an on-axis chromatic aberration curve of the image pickup lens group of example five, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the image pickup lens group. Fig. 19 shows an astigmatism curve of the imaging lens group of example five, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 20 shows distortion curves of an imaging lens group of example five, which represent distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 18 to 20, the imaging lens group given in example five can achieve good imaging quality.

In summary, examples one to five satisfy the relationships shown in table 11, respectively.

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Table 11 table 12 gives effective focal lengths f1 to f6 of the respective lenses of the imaging lens groups of examples one to five.

Example parameters	1	2	3	4	5
						f(mm)	3.17	3.17	3.17	3.17	3.19
f1(mm)	4.47	3.53	4.49	4.71	4.51
						f2(mm)	6.75	9.67	6.91	10.02	7.14
f3(mm)	-4.52	-4.14	-5.67	-6.72	-4.33
						f4(mm)	2.42	2.46	2.49	3.44	2.69
f5(mm)	-8.35	-8.37	-7.46	6.94	11.53
						f6(mm)	-3.94	-3.81	-3.78	-2.42	-2.23
TTL(mm)	4.35	4.35	4.35	4.34	4.35
						ImgH(mm)	3.43	3.43	3.43	3.43	3.41
Semi-FOV(°)	46.6	47.0	46.7	46.3	46.0

Table 12

The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the above-described image pickup lens group.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An image pickup lens group, wherein the number of lenses of the image pickup lens group having optical power is six, and the image pickup lens group comprises, from an object side to an image side:

a first lens having positive optical power;

a second lens having positive optical power;

a third lens with negative focal power, wherein the object side surface of the third lens is a concave surface;

A fourth lens element with positive refractive power, wherein the object-side surface of the fourth lens element is concave and the image-side surface of the fourth lens element is convex;

A fifth lens having optical power;

A sixth lens having negative optical power;

the center thickness of the first lens is greater than the center thickness of any one of the second lens to the sixth lens;

air spaces are arranged among the lenses;

The on-axis distance TTL from the object side surface of the first lens to the imaging surface of the image capturing lens assembly and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: 1.1< TTL/ImgH <1.3;

The effective focal length f4 of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy the following conditions:

-3.5<R7/f4<-1.0。

2. the imaging lens group according to claim 1, wherein an effective focal length f of the imaging lens group and an entrance pupil diameter EPD of the imaging lens group satisfy: f/EPD is less than or equal to 2.1.

3. The imaging lens set according to claim 1, wherein a maximum field angle FOV of the imaging lens set satisfies: FOV >90 °.

4. The imaging lens group according to claim 1, wherein an effective focal length f of the imaging lens group and an effective focal length f2 of the second lens satisfy: 2.0 < f2/f < 3.5.

5. The imaging lens system according to claim 1, wherein a radius of curvature R1 of an object side surface of the first lens and an effective focal length f1 of the first lens satisfy: 1.5 < f1/R1 < 3.0.

6. The imaging lens system according to claim 1, wherein an effective focal length f3 of the third lens and a radius of curvature R5 of an object side surface of the third lens satisfy: 0.5 < f3/R5 < 2.0.

7. The imaging lens system according to claim 1, wherein a radius of curvature R5 of an object side surface of the third lens and a radius of curvature R9 of an object side surface of the fifth lens satisfy: 1.0 < |R9/R5| < 6.5.

8. The imaging lens system according to claim 1, wherein a radius of curvature R8 of an image side surface of the fourth lens and an effective focal length f4 of the fourth lens satisfy: -2.5 < f4/R8 < -2.0.

9. The imaging lens system according to claim 1, wherein an effective focal length f5 of the fifth lens and an effective focal length f6 of the sixth lens satisfy: -5.5 < |f5|/f6 < -1.5.

10. The image capturing lens assembly of claim 1, wherein an effective focal length f6 of the sixth lens and a radius of curvature R12 of an image side surface of the sixth lens satisfy: -5.5 < f6/R12 < -1.5.

11. The image pickup lens group according to claim 1, wherein an air interval T12 of the first lens and the second lens on an optical axis of the image pickup lens group, an air interval T34 of the third lens and the fourth lens on the optical axis satisfy: T12/T34 is more than 0.5 and less than 6.0.

12. The image pickup lens group according to claim 1, wherein a center thickness CT4 of the fourth lens on an optical axis of the image pickup lens group and an edge thickness ET4 of the fourth lens satisfy: CT4/ET4 is more than 1.5 and less than 2.5.

13. The imaging lens system according to claim 1, wherein an on-axis distance SAG61 between an intersection point of an object side surface of the sixth lens and an optical axis of the imaging lens system to an axial point between an effective radius vertex of the object side surface of the sixth lens and an edge thickness ET6 of the sixth lens satisfies-2.0 < SAG61/ET6 < -0.5.

14. The imaging lens set according to claim 1, wherein a combined focal length f34 of the third lens and the fourth lens and an effective focal length f of the imaging lens set satisfy: 0.5 < f34/f < 2.0.

15. The imaging lens system according to claim 1, wherein a combined focal length f12 of the first lens and the second lens, and a combined focal length f56 of the fifth lens and the sixth lens satisfy: -2.0 < f12/f56 < -0.5.

16. The image capturing lens assembly according to claim 1, wherein an on-axis distance SAG62 between an intersection of an image side surface of the sixth lens and an optical axis of the image capturing lens assembly and an axial point between an effective radius vertex of the image side surface of the sixth lens and an axial point between an intersection of an image side surface of the fourth lens and an optical axis of the image capturing lens assembly and an effective radius vertex of the image side surface of the fourth lens and an axial distance SAG42 between: 0.8 < SAG62/SAG42 < 2.0.