CN216792565U

CN216792565U - Camera lens group

Info

Publication number: CN216792565U
Application number: CN202220296437.4U
Authority: CN
Inventors: 朱晓晓; 徐武超; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-06-21
Anticipated expiration: 2032-02-14

Abstract

The utility model provides a camera lens group, which comprises a first lens, a second lens and a third lens, wherein the object side surface of the first lens is convex, and the image side surface of the first lens is concave; a second lens with refractive power, wherein the object side surface of the second lens is convex, and the image side surface of the second lens is concave; a third lens with refractive power; a fourth lens element with negative refractive power having a concave image-side surface; a fifth lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a sixth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the camera lens group, the effective half caliber DT31 of the object side surface of the third lens and the effective half caliber DT22 of the image side surface of the second lens meet the following requirements: 1.4< ImgH/(DT22+ DT31) < 1.8. The utility model solves the problem that the imaging lens group in the prior art is not compatible with miniaturization and high image quality.

Description

Camera lens group

Technical Field

The utility model relates to the technical field of optical imaging equipment, in particular to a camera lens group.

Background

With the rapid development of intelligent products, the demand of each large electronic device manufacturer for a lens mounted on a mobile terminal is higher and higher, and especially the requirement for the main camera of a high-end model is higher. The large image surface and the large aperture of the lens are beneficial to realizing higher resolution and signal-to-noise ratio, meanwhile, the ultra-thin lens is beneficial to better compatibility and carrying of the lens, the imaging capability and the competitive advantage of the lens can be greatly improved, and meanwhile, the design of a camera lens group is also challenged with higher difficulty.

That is to say, the image capturing lens assembly in the prior art has the problem of incompatibility of miniaturization and high image quality.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a camera lens group to solve the problem that the camera lens group in the prior art is not compatible with miniaturization and high image quality.

In order to achieve the above object, according to one aspect of the present invention, there is provided an imaging lens group comprising, from an object side to an image side: a first lens with positive refractive power, wherein the object side surface of the first lens is convex, and the image side surface of the first lens is concave; a second lens with refractive power, wherein the object side surface of the second lens is convex, and the image side surface of the second lens is concave; a third lens with refractive power; a fourth lens element with negative refractive power having a concave image-side surface; a fifth lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a sixth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the camera lens group, the effective half caliber DT31 of the object side surface of the third lens and the effective half caliber DT22 of the image side surface of the second lens meet the following requirements: 1.4< ImgH/(DT22+ DT31) < 1.8.

Further, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: 1.1< f1/f5< 1.8.

Further, 0< f6/f4<1 is satisfied between the effective focal length f6 of the sixth lens and the effective focal length f4 of the fourth lens.

Further, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.8< (R1+ R2)/(R3+ R4) < 1.3.

Furthermore, the effective focal length f of the imaging lens group, the curvature radius R8 of the image side surface of the fourth lens, the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0.6< (R8+ R9+ R10)/f < 2.0.

Further, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: 2.0< (R11+ R12)/(R11-R12) < 2.8.

Further, the maximum field angle of the imaging lens group satisfies FOV: 70 < FOV < 85.

Further, the combined focal length f56 of the fifth lens and the sixth lens and the combined focal length f12 of the first lens and the second lens satisfy the following conditions: 0.2< f12/f56< 1.3.

Further, an on-axis distance TTL from the object-side surface of the first lens element to the image plane of the image pickup lens group, an air space T23 on the optical axis between the second lens element and the third lens element, and an air space T56 on the optical axis between the fifth lens element and the sixth lens element satisfy: 5.3< TTL/(T23+ T56) < 6.3.

Further, an on-axis distance SAG52 from the intersection point of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens, an on-axis distance SAG42 from the intersection point of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens, and an on-axis distance SAG41 from the intersection point of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy: 0.7< SAG52/(SAG41+ SAG42) < 1.6.

Further, an on-axis distance SAG62 from the intersection point of the image-side surface of the sixth lens and the optical axis to the effective radius vertex of the image-side surface of the sixth lens, and an on-axis distance SAG61 from the intersection point of the object-side surface of the sixth lens and the optical axis to the effective radius vertex of the object-side surface of the sixth lens satisfy: 0.7< SAG61/SAG62< 1.2.

Further, the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens satisfy: 1.0< ET6/ET5< 1.8.

According to another aspect of the present invention, an image capturing lens assembly comprises, from an object side to an image side: a first lens with positive refractive power, wherein the object side surface of the first lens is convex, and the image side surface of the first lens is concave; a second lens with refractive power, wherein the object side surface of the second lens is convex, and the image side surface of the second lens is concave; a third lens with refractive power; a fourth lens element with negative refractive power having a concave image-side surface; a fifth lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a sixth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; wherein, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group, the air space T23 on the optical axis between the second lens and the third lens, and the air space T56 on the optical axis between the fifth lens and the sixth lens satisfy: 5.3< TTL/(T23+ T56) < 6.3.

Further, an on-axis distance SAG52 from an intersection point of the image side surface of the fifth lens and the optical axis to an effective radius vertex of the image side surface of the fifth lens, an on-axis distance SAG42 from an intersection point of the image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens, and an on-axis distance SAG41 from an intersection point of the object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens satisfy: 0.7< SAG52/(SAG41+ SAG42) < 1.6.

Further, the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens satisfy the following condition: 1.0< ET6/ET5< 1.8.

With the technical solution of the present invention, the image capturing lens assembly includes, from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, wherein the first lens element has positive refractive power, an object side surface of the first lens element is convex, and an image side surface of the first lens element is concave; the second lens has refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the third lens has refractive power; the fourth lens has negative refractive power, and the image side surface of the fourth lens is concave; the fifth lens has positive refractive power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex; the sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface; the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the camera lens group, the effective half caliber DT31 of the object side surface of the third lens and the effective half caliber DT22 of the image side surface of the second lens meet the following requirements: 1.4< ImgH/(DT22+ DT31) < 1.8.

Through the positive and negative distribution of the refractive power of each lens of the lens group of making a video recording of reasonable control, the low order aberration of the lens group of making a video recording of effectual balance can reduce the sensitivity of the tolerance of the lens group of making a video recording simultaneously, guarantees the imaging quality of the lens group of making a video recording when keeping the miniaturization of the lens group of making a video recording. Through restricting ImgH/(DT22+ DT31) in reasonable scope, both can control the size of making a video recording lens group, can also slow down the deflection of light at second lens, third lens, make the chip can receive light better, and then promote the illuminance at image plane. And the size of the image plane and the aperture of the six-piece type image pickup lens group in the application is equivalent to that of a traditional seven-piece type lens, and has the characteristics of miniaturization and lightness and thinness compared with the seven-piece type lens, and simultaneously has a good imaging effect while ensuring the miniaturization.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural view of a first image capturing lens assembly according to an example of the present invention;

fig. 2 to 5 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens group in fig. 1, respectively;

fig. 6 is a schematic structural view of an image pickup lens group according to a second example of the present invention;

fig. 7 to 10 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group in fig. 6;

fig. 11 is a schematic structural view of an image pickup lens group according to a third example of the present invention;

fig. 12 to 15 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens assembly of fig. 11, respectively;

fig. 16 is a schematic structural view of an image pickup lens group according to a fourth example of the present invention;

fig. 17 to 20 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group in fig. 16;

fig. 21 is a schematic view showing a configuration of an image pickup lens group according to a fifth example of the present invention;

fig. 22 to 25 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens group of fig. 21, respectively;

fig. 26 is a schematic structural view of an image pickup lens group according to a sixth example of the present invention; and

fig. 27 to 30 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group in fig. 26.

Wherein the figures include the following reference numerals:

STO, stop; e1, a first lens; s1, the object side surface of the first lens; s2, the 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, third lens; s5, the object side surface of the third lens; s6, the image side surface of the third lens; e4, fourth lens; s7, the object side surface of the fourth lens; s8, the image side surface of the fourth lens; e5, fifth lens; s9, the object side surface of the fifth lens; s10, the image side surface of the fifth lens; e6, sixth lens; s11, the object side surface of the sixth lens; s12, the image side surface of the sixth lens; e7 filter plate; s13, the object side surface of the filter plate; s14, the image side surface of the filter plate; and S15, imaging surface.

Detailed Description

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

It is to be noted that, unless otherwise indicated, 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.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, 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. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then it is indicated that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concave shape is not defined, it is indicative that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be made by determining whether or not the surface shape is concave or convex using an R value (R denotes a radius of curvature of the paraxial region, and usually denotes an R value in a lens database (lens data) in optical software) according to a determination method by a person ordinarily skilled in the art. When the R value is positive, the object side is judged to be convex, and when the R value is negative, the object side is judged to be concave; the image side surface is determined to be concave when the R value is positive, and to be convex when the R value is negative.

The utility model provides a camera lens group, aiming at solving the problem that the camera lens group in the prior art is not compatible with miniaturization and high image quality.

Example one

As shown in fig. 1 to 30, the image capturing lens assembly includes, from an object side to an image side, a first lens element with positive refractive power, a second lens element with a convex object-side surface and a concave image-side surface, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element with positive refractive power, and a sixth lens element with positive refractive power; the second lens has refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the third lens has refractive power; the fourth lens has negative refractive power, and the image side surface of the fourth lens is concave; the fifth lens has positive refractive power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex; the sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface; the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the camera lens group, the effective half caliber DT31 of the object side surface of the third lens and the effective half caliber DT22 of the image side surface of the second lens meet the following requirements: 1.4< ImgH/(DT22+ DT31) < 1.8.

Through the positive and negative distribution of the refractive power of each lens of the lens group of making a video recording of reasonable control, can effectual balance make a video recording the low order aberration of lens group, can reduce the sensitivity of the tolerance of the lens group of making a video recording simultaneously, guarantee the imaging quality of the lens group of making a video recording when keeping the miniaturization of the lens group of making a video recording. Through restricting ImgH/(DT22+ DT31) in reasonable scope, both can control the size of making a video recording lens group, can also slow down the deflection of light at second lens, third lens, make the chip can receive light better, and then promote the illuminance at image plane. And the size of the image plane and the aperture of the six-piece type image pickup lens group in the application is equivalent to that of a traditional seven-piece type lens, and has the characteristics of miniaturization and lightness and thinness compared with the seven-piece type lens, and simultaneously has a good imaging effect while ensuring the miniaturization.

Preferably, the length ImgH of the diagonal line of the effective pixel area on the imaging surface of the imaging lens group, the effective half-aperture DT31 of the object-side surface of the third lens element, and the effective half-aperture DT22 of the image-side surface of the second lens element satisfy: 1.5< ImgH/(DT22+ DT31) < 1.7.

It should be noted that, the six-lens type photographing lens assembly provided by this embodiment has a large image plane and satisfies fno1.4, and compared with a seven-lens type photographing lens assembly, the six-lens type photographing lens assembly can better achieve the characteristic of ultra-thinning, and obtains a good imaging effect on the basis of ensuring the miniaturization of the lens.

In the present embodiment, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: 1.1< f1/f5< 1.8. The refractive power of the first lens and the fifth lens is reasonably controlled to effectively reduce the optical sensitivity of the first lens and the fifth lens, so that the mass production requirement is more favorably realized, the yield of the first lens and the fifth lens is increased, and the imaging quality of the camera lens group can be effectively ensured. Preferably, 1.2< f1/f5< 1.7.

In the embodiment, 0< f6/f4<1 is satisfied between the effective focal length f6 of the sixth lens and the effective focal length f4 of the fourth lens. By restricting the refractive power ratio of the fourth lens and the sixth lens within a reasonable range, the spherical aberration contributions of the fourth lens and the sixth lens can be reasonably controlled within a reasonable level, so that the on-axis field of view has good imaging quality. Preferably, 0.1< f6/f4< 0.9.

In the present embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.8< (R1+ R2)/(R3+ R4) < 1.3. Through with (R1+ R2)/(R3+ R4) control in reasonable within range, just make the curvature radius of the object side of first lens, the curvature radius of the image side of first lens, the curvature radius of the object side of second lens and the curvature radius restriction of the image side of second lens in certain relation within range, make first lens and second lens be the adaptation and each other pin down, and then can reduce the deflection angle of light between first lens and second lens, thereby avoid the too big strong total reflection ghost image that produces of deflection angle, guarantee the imaging quality of making a video recording lens group. Preferably, 0.9< (R1+ R2)/(R3+ R4) < 1.2.

In the present embodiment, the effective focal length f of the imaging lens group, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: 0.6< (R8+ R9+ R10)/f < 2.0. Through restricting (R8+ R9+ R10)/f in reasonable within range for produce between the total focal length of fourth lens and fifth lens and the lens group of making a video recording and hold back each other, with the angle of deflection of the marginal light of the lens group of rationally controlling, effectively reduce the sensitivity of the lens group of making a video recording, guarantee the imaging performance of the lens group of making a video recording. Preferably, 0.85< (R8+ R9+ R10)/f < 1.95.

In the present embodiment, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: 2.0< (R11+ R12)/(R11-R12) < 2.8. By controlling (R11+ R12)/(R11-R12) within a reasonable range, the deflection angle of the marginal field of view at the sixth lens can be controlled, and the sensitivity of the image pickup lens group is reduced. Preferably, 2.2< (R11+ R12)/(R11-R12) < 2.6.

In the present embodiment, the maximum field angle of the imaging lens group satisfies FOV: 70 < FOV < 85. The FOV of the camera lens group in the application is in the range from 70 degrees to 85 degrees, so that the camera lens group has a larger imaging range, and a large image plane is realized by the camera lens group. Preferably, 75 ° < FOV <82 °.

In this embodiment, the combined focal length f56 of the fifth and sixth lenses and the combined focal length f12 of the first and second lenses satisfy: 0.2< f12/f56< 1.3. By controlling f12/f56 within a reasonable range, the first lens, the second lens, the fifth lens and the sixth lens are mutually restrained, so that the deflection angle of light rays is reduced, the deflection of a light path of the camera lens group is better realized, and the imaging quality is improved. Preferably 0.3< f12/f56< 1.2.

In this embodiment, an on-axis distance TTL from the object-side surface of the first lens element to the image plane of the image capturing lens group, an air interval T23 on the optical axis between the second lens element and the third lens element, and an air interval T56 on the optical axis between the fifth lens element and the sixth lens element satisfy: 5.3< TTL/(T23+ T56) < 6.3. By limiting TTL/(T23+ T56) within a reasonable range, the field curvature contribution amount of each field of view of the shooting lens group is controlled within a reasonable range, the field curvature amount generated by other lenses is balanced, and the imaging quality of the shooting lens group is ensured. Preferably, 5.5< TTL/(T23+ T56) < 6.2.

In the embodiment, the on-axis distance SAG52 from the intersection point of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens, the on-axis distance SAG42 from the intersection point of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens, and the on-axis distance SAG41 from the intersection point of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy: 0.7< SAG52/(SAG41+ SAG42) < 1.6. By controlling SAG52/(SAG41+ SAG42) within a reasonable range, the shapes of the fourth lens and the fifth lens can be ensured, the fourth lens and the fifth lens can be processed at a better level, spherical aberration, coma aberration and astigmatism generated by the shooting lens group can be effectively balanced, and the imaging quality of the shooting lens group can be effectively ensured. Preferably, 0.93< SAG52/(SAG41+ SAG42) < 1.5.

In this embodiment, the on-axis distance SAG62 between the intersection point of the image-side surface of the sixth lens and the optical axis and the effective radius vertex of the image-side surface of the sixth lens, and the on-axis distance SAG61 between the intersection point of the object-side surface of the sixth lens and the optical axis and the effective radius vertex of the object-side surface of the sixth lens satisfy: 0.7< SAG61/SAG62< 1.2. The SAG61/SAG62 is controlled within a reasonable range, so that the angle of the principal ray of the camera lens group is adjusted, the relative brightness of the camera lens group can be effectively improved, and the definition of an image plane is improved. Preferably 0.92< SAG61/SAG62< 1.1.

In the present embodiment, the edge thickness ET6 of the sixth lens sheet and the edge thickness ET5 of the fifth lens sheet satisfy: 1.0< ET6/ET5< 1.8. Through controlling ET6/ET5 at reasonable within range for pin down each other between the marginal thickness of six lenses and fifth lens, can avoid these two lens edges too thin difficult shaping, can also alleviate the light deflection at lens edge, avoid stronger ghost image, guarantee the imaging quality of making a video recording lens group. Preferably, 1.2< ET6/ET5< 1.7.

Example two

As shown in fig. 1 to 30, the image capturing lens assembly includes, from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, wherein the first lens element has positive refractive power, an object side surface of the first lens element is convex, and an image side surface of the first lens element is concave; the second lens has refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the third lens has refractive power; the fourth lens has negative refractive power, and the image side surface of the fourth lens is concave; the fifth lens has positive refractive power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex; the sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group, the air interval T23 between the second lens and the third lens on the optical axis, and the air interval T56 between the fifth lens and the sixth lens on the optical axis satisfy the following conditions: 5.3< TTL/(T23+ T56) < 6.3.

Through the positive and negative distribution of the refractive power of each lens of the lens group of making a video recording of reasonable control, can effectual balance make a video recording the low order aberration of lens group, can reduce the sensitivity of the tolerance of the lens group of making a video recording simultaneously, guarantee the imaging quality of the lens group of making a video recording when keeping the miniaturization of the lens group of making a video recording. By limiting TTL/(T23+ T56) within a reasonable range, the field curvature contribution amount of each field of view of the shooting lens group is controlled within a reasonable range, the field curvature amount generated by other lenses is balanced, and the imaging quality of the shooting lens group is ensured.

Preferably, an on-axis distance TTL from the object-side surface of the first lens element to the image plane of the image pickup lens group, an air interval T23 on the optical axis between the second lens element and the third lens element, and an air interval T56 on the optical axis between the fifth lens element and the sixth lens element satisfy: 5.5< TTL/(T23+ T56) < 6.2.

In the present embodiment, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: 1.1< f1/f5< 1.8. The refractive power of the first lens and the refractive power of the fifth lens are reasonably controlled, so that the optical sensitivity of the first lens and the optical sensitivity of the fifth lens are effectively reduced, the mass production requirement is more favorably met, the yield of the first lens and the yield of the fifth lens are increased, and the imaging quality of the camera lens group can be effectively guaranteed. Preferably, 1.2< f1/f5< 1.7.

In the present embodiment, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: 2.0< (R11+ R12)/(R11-R12) < 2.8. By controlling (R11+ R12)/(R11-R12) within a reasonable range, the deflection angle of the peripheral field of view at the sixth lens can be controlled, and the sensitivity of the imaging lens group can be reduced. Preferably, 2.2< (R11+ R12)/(R11-R12) < 2.6.

In this embodiment, the maximum field angle of the imaging lens group satisfies the FOV: 70 ° < FOV <85 °. The FOV of the camera lens group in the application is in the range from 70 degrees to 85 degrees, so that the camera lens group has a larger imaging range, and a large image plane is realized by the camera lens group. Preferably, 75 ° < FOV <82 °.

In this embodiment, the combined focal length f56 of the fifth and sixth lenses and the combined focal length f12 of the first and second lenses satisfy: 0.2< f12/f56< 1.3. The f12/f56 is controlled within a reasonable range, so that the first lens, the second lens, the fifth lens and the sixth lens are mutually restrained, the deflection angle of light rays is reduced, the deflection of a light path of the camera lens group is better realized, and the imaging quality is improved. Preferably 0.3< f12/f56< 1.2.

In the embodiment, the axial distance SAG52 from the intersection point of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens, the axial distance SAG42 from the intersection point of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens, and the axial distance SAG41 from the intersection point of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy the following conditions: 0.7< SAG52/(SAG41+ SAG42) < 1.6. By controlling SAG52/(SAG41+ SAG42) within a reasonable range, the shapes of the fourth lens and the fifth lens can be ensured, the fourth lens and the fifth lens can be processed at a better level, spherical aberration, coma aberration and astigmatism generated by the shooting lens group can be effectively balanced, and the imaging quality of the shooting lens group can be effectively ensured. Preferably, 0.93< SAG52/(SAG41+ SAG42) < 1.5.

The edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens satisfy the following conditions: 1.0< ET6/ET5< 1.8. Through controlling ET6/ET5 in reasonable scope for the edge thickness of six lenses and fifth lens is drawn back each other, can avoid these two lens edges too thin difficult shaping, can also alleviate the light deflection at lens edge, avoids stronger ghost image, guarantees the imaging quality of making a video recording lens group. Preferably, 1.2< ET6/ET5< 1.7.

Optionally, the image capturing lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the image plane.

The imaging lens group in the present application may employ a plurality of lenses, for example, the six lenses described above. By reasonably distributing the refractive power, the surface shape, the center thickness of each lens, the on-axis distance between the lenses and the like of each lens, the aperture of the camera lens group can be effectively increased, the sensitivity of the camera lens can be reduced, and the machinability of the camera lens can be improved, so that the camera lens group is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens has the characteristics 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 lens center to the lens periphery, an aspherical lens has a better curvature radius characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.

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

Specific surface types and parameters of the imaging lens group applicable to the above embodiments will be further described with reference to the drawings.

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

Example one

As shown in fig. 1 to 5, an image pickup lens group according to the first example of the present application is described. Fig. 1 is a schematic view showing a configuration of an imaging lens group according to a first example.

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

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

In this example, the total effective focal length f of the imaging lens group is 4.94mm, the total length TTL of the imaging lens group is 6.09mm and the image height ImgH is 4.16 mm.

Table 1 shows a basic configuration parameter table of the image pickup lens group of example one, in which the units of the radius of curvature, the thickness/distance, and the 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 E1 through the sixth lens E6 are aspheric surfaces, and the surface shape of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each of the aspherical mirrors S1-S12 in example one.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

2.6774E-03

-1.3927E-02

5.3993E-02

-1.3170E-01

2.1189E-01

-2.2331E-01

1.5063E-01

S2

-6.1609E-02

4.6999E-02

-1.1574E-01

6.3308E-01

-2.1363E+00

4.5255E+00

-6.4242E+00

S3

-9.4566E-02

3.7058E-02

1.0869E-01

-5.7323E-01

1.8558E+00

-4.0847E+00

6.2274E+00

S4

-4.9299E-02

9.5210E-03

4.2704E-01

-3.7709E+00

1.8771E+01

-5.9114E+01

1.2511E+02

S5

-2.8004E-02

-1.1726E-01

1.2072E+00

-7.3510E+00

2.8021E+01

-7.1730E+01

1.2802E+02

S6

-4.3974E-02

-9.1463E-02

9.8242E-01

-4.8943E+00

1.4607E+01

-2.9207E+01

4.0888E+01

S7

-1.8781E-01

2.6304E-01

4.3239E-02

-2.0530E+00

6.6993E+00

-1.2370E+01

1.5162E+01

S8

-3.9280E-01

8.4041E-01

-1.7028E+00

2.6809E+00

-3.1983E+00

2.8698E+00

-1.9414E+00

S9

-2.9655E-01

5.9424E-01

-1.1830E+00

1.9308E+00

-2.4627E+00

2.3871E+00

-1.7416E+00

S10

-1.4666E-01

3.0501E-01

-5.6355E-01

8.2180E-01

-8.7848E-01

6.7619E-01

-3.7613E-01

S11

-4.1302E-01

3.0696E-01

-1.6847E-01

6.2303E-02

-1.3736E-02

1.1286E-03

3.0253E-04

S12

-3.9083E-01

3.3153E-01

-2.3103E-01

1.2384E-01

-5.0275E-02

1.5347E-02

-3.5071E-03

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-5.9687E-02

8.9869E-03

3.0533E-03

-1.8403E-03

3.6821E-04

-2.7622E-05

0.0000E+00

S2

6.3274E+00

-4.3852E+00

2.1328E+00

-7.1273E-01

1.5584E-01

-2.0072E-02

1.1545E-03

S3

-6.6891E+00

5.0990E+00

-2.7427E+00

1.0176E+00

-2.4780E-01

3.5649E-02

-2.2964E-03

S4

-1.8379E+02

1.8992E+02

-1.3764E+02

6.8498E+01

-2.2294E+01

4.2734E+00

-3.6573E-01

S5

-1.6241E+02

1.4729E+02

-9.4787E+01

4.2250E+01

-1.2398E+01

2.1539E+00

-1.6776E-01

S6

-4.0894E+01

2.9374E+01

-1.5027E+01

5.3393E+00

-1.2513E+00

1.7376E-01

-1.0820E-02

S7

-1.2991E+01

7.9247E+00

-3.4360E+00

1.0361E+00

-2.0671E-01

2.4529E-02

-1.3104E-03

S8

9.9222E-01

-3.8067E-01

1.0758E-01

-2.1630E-02

2.9135E-03

-2.3471E-04

8.5210E-06

S9

9.4876E-01

-3.8109E-01

1.1065E-01

-2.2490E-02

3.0263E-03

-2.4170E-04

8.6641E-06

S10

1.5158E-01

-4.4048E-02

9.1056E-03

-1.3029E-03

1.2249E-04

-6.8030E-06

1.6909E-07

S11

-1.2622E-04

2.3330E-05

-2.6902E-06

2.0403E-07

-9.9506E-09

2.8419E-10

-3.6233E-12

S12

5.9684E-04

-7.4941E-05

6.8254E-06

-4.3738E-07

1.8663E-08

-4.7538E-10

5.4628E-12

TABLE 2

Fig. 2 shows an axial chromatic aberration curve of the first example image pickup lens group, which shows the deviation of the focal point of light rays having different wavelengths after passing through the image pickup lens group. Fig. 3 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the image pickup lens group of the first example. Fig. 4 shows distortion curves of the imaging lens group of the first example, which show values of distortion magnitudes corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the first imaging lens group, which shows the deviation of light rays passing through the first imaging lens group at different image heights on the image plane.

As can be seen from fig. 2 to 5, the image capturing lens assembly of the first example can achieve good image quality.

Example two

As shown in fig. 6 to 10, an image pickup lens group according to example two of the present application is described. In this and the following examples, a description of portions similar to example one will be omitted for the sake of brevity. Fig. 6 is a schematic diagram showing a configuration of an imaging lens group according to example two.

As shown in fig. 6, the image capturing lens assembly, in order from an object side to an image side, comprises: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 4.94mm, the total length TTL of the imaging lens group is 6.10mm and the image height ImgH is 4.18 mm.

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

TABLE 3

Table 4 shows the high-order term coefficients that can be used for each aspherical mirror surface in example two, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

TABLE 4

Fig. 7 shows an axial chromatic aberration curve of the image pickup lens group of the second example, which shows the deviation of the focal point of light rays having different wavelengths after passing through the image pickup lens group. Fig. 8 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens group of the second example. Fig. 9 shows distortion curves of the imaging lens group of the second example, which show values of distortion magnitudes corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the imaging lens group of the second example, which shows the deviation of the light beam from the image height on the image plane after passing through the imaging lens group.

As can be seen from fig. 7 to 10, the imaging lens assembly according to example two can achieve good image quality.

Example III

As shown in fig. 11 to 15, an imaging lens group according to a third example of the present application is described. Fig. 11 is a schematic view showing a configuration of an image pickup lens group according to example three.

As shown in fig. 11, the image capturing lens assembly, in order from an object side to an image side, comprises: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 4.93mm, the total length TTL of the imaging lens group is 6.19mm and the image height ImgH is 4.06 mm.

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

TABLE 5

Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in example three, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

TABLE 6

Fig. 12 shows an axial chromatic aberration curve of the image pickup lens group of example three, which shows the deviation of the focal point of light rays of different wavelengths after passing through the image pickup lens group. Fig. 13 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens group of example three. Fig. 14 shows distortion curves of the imaging lens group of the third example, which show values of distortion magnitudes corresponding to different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of the imaging lens group of the third example, which shows the deviation of the light beam from the image height on the image plane after passing through the imaging lens group.

As can be seen from fig. 12 to 15, the imaging lens group according to the third example can achieve good image quality.

Example four

As shown in fig. 16 to 20, an image pickup lens group according to example four of the present application is described. Fig. 16 is a schematic diagram showing a configuration of an imaging lens group of example four.

As shown in fig. 16, the image capturing lens assembly, in order from an object side to an image side, comprises: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 4.94mm, the total length TTL of the imaging lens group is 6.18mm and the image height ImgH is 4.22 mm.

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

TABLE 7

Table 8 shows the high-order term coefficients that can be used for each aspherical mirror surface in example four, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

TABLE 8

Fig. 17 shows an axial chromatic aberration curve of the imaging lens group of example four, which shows the deviation of the focal point of light rays of different wavelengths after passing through the imaging lens group. Fig. 18 shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of example four. Fig. 19 shows distortion curves of the imaging lens group of example four, which show values of distortion magnitudes corresponding to different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the imaging lens group of the fourth example, which shows the deviation of the light beam from the image height on the image plane after passing through the imaging lens group.

As can be seen from fig. 17 to 20, the imaging lens group according to example four can achieve good image quality.

Example five

As shown in fig. 21 to 25, an imaging lens group according to a fifth example of the present application is described. Fig. 21 is a schematic view showing a configuration of an image pickup lens group according to example five.

As shown in fig. 21, the image capturing lens assembly, in order from an object side to an image side, comprises: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 4.91mm, the total length TTL of the imaging lens group is 6.21mm and the image height ImgH is 4.15 mm.

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

TABLE 9

Table 10 shows the high-order term coefficients that can be used for each aspherical mirror in example five, wherein each aspherical mirror type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-1.1194E-03

1.3002E-02

-5.5921E-02

1.4018E-01

-1.8388E-01

7.0474E-02

1.5789E-01

S2

-4.4653E-02

9.8753E-03

5.8086E-02

-1.1649E-01

-7.1050E-02

7.4299E-01

-1.6085E+00

S3

-7.0607E-02

1.9143E-01

-1.2330E+00

5.2769E+00

-1.4662E+01

2.7805E+01

-3.7104E+01

S4

-4.4784E-03

-2.1375E-01

1.8915E+00

-9.9087E+00

3.4072E+01

-8.0468E+01

1.3440E+02

S5

-3.3061E-03

-1.8894E-01

1.2610E+00

-6.1169E+00

2.0221E+01

-4.6674E+01

7.6700E+01

S6

-3.0884E-02

-3.7013E-01

2.1276E+00

-7.0903E+00

1.5568E+01

-2.3928E+01

2.6474E+01

S7

-1.4369E-01

3.1073E-02

3.6914E-01

-1.2970E+00

2.4499E+00

-3.0816E+00

2.7333E+00

S8

-1.6861E-01

1.8335E-01

-3.1232E-01

5.3359E-01

-7.4254E-01

7.8029E-01

-6.0857E-01

S9

-7.9302E-02

1.0809E-01

-3.0246E-01

6.1969E-01

-8.7912E-01

8.7434E-01

-6.2034E-01

S10

-8.3887E-02

1.5306E-01

-2.7200E-01

3.7913E-01

-3.8708E-01

2.8491E-01

-1.5106E-01

S11

-3.8985E-01

2.5000E-01

-1.2617E-01

4.9405E-02

-1.3254E-02

1.7005E-03

2.7456E-04

S12

-3.8178E-01

3.0086E-01

-1.9723E-01

1.0033E-01

-3.8656E-02

1.1195E-02

-2.4322E-03

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-3.0409E-01

2.6972E-01

-1.4633E-01

5.1035E-02

-1.1209E-02

1.4154E-03

-7.8525E-05

S2

1.9610E+00

-1.5437E+00

8.1491E-01

-2.8756E-01

6.5204E-02

-8.6007E-03

5.0195E-04

S3

3.5411E+01

-2.4271E+01

1.1846E+01

-4.0163E+00

8.9871E-01

-1.1930E-01

7.1130E-03

S4

-1.6127E+02

1.3950E+02

-8.6213E+01

3.7120E+01

-1.0574E+01

1.7906E+00

-1.3644E-01

S5

-9.0732E+01

7.7366E+01

-4.7072E+01

1.9916E+01

-5.5629E+00

9.2163E-01

-6.8551E-02

S6

-2.1356E+01

1.2576E+01

-5.3467E+00

1.5973E+00

-3.1781E-01

3.7774E-02

-2.0265E-03

S7

-1.7578E+00

8.3578E-01

-2.9676E-01

7.7944E-02

-1.4457E-02

1.6888E-03

-9.2622E-05

S8

3.5026E-01

-1.4739E-01

4.4568E-02

-9.3929E-03

1.3065E-03

-1.0764E-04

3.9749E-06

S9

3.1695E-01

-1.1665E-01

3.0603E-02

-5.5763E-03

6.7008E-04

-4.7712E-05

1.5239E-06

S10

5.7702E-02

-1.5804E-02

3.0646E-03

-4.0991E-04

3.5936E-05

-1.8578E-06

4.2933E-08

S11

-1.8671E-04

4.4692E-05

-6.3546E-06

5.7745E-07

-3.3037E-08

1.0886E-09

-1.5802E-11

S12

3.9523E-04

-4.7659E-05

4.1957E-06

-2.6167E-07

1.0942E-08

-2.7500E-10

3.1391E-12

Watch 10

Fig. 22 shows an axial chromatic aberration curve of the imaging lens group of example five, which shows the deviation of the focal point of light rays of different wavelengths after passing through the imaging lens group. Fig. 23 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens group of example five. Fig. 24 shows distortion curves of the imaging lens group of example five, which show values of distortion magnitudes corresponding to different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the imaging lens group of example five, which shows the deviation of light rays at different image heights on the image forming surface after passing through the imaging lens group.

As can be seen from fig. 22 to 25, the imaging lens group according to example five can achieve good image quality.

Example six

As shown in fig. 26 to 30, an imaging lens group according to a sixth example of the present application is described. Fig. 26 is a schematic diagram showing a configuration of an imaging lens group of example six.

As shown in fig. 26, the image capturing lens assembly, in order from an object side to an image side, comprises: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 4.93mm, the total length TTL of the imaging lens group is 6.21mm and the image height ImgH is 4.17 mm.

Table 11 shows a basic configuration parameter table of the imaging lens group of example six, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 11

Table 12 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-4.1010E-04

2.4043E-03

1.6000E-02

-1.2712E-01

4.3929E-01

-9.0485E-01

1.2219E+00

S2

-4.8596E-02

4.8004E-02

-1.6483E-01

6.9685E-01

-1.9725E+00

3.7391E+00

-4.8999E+00

S3

-6.5015E-02

6.2008E-02

-2.8488E-01

1.2734E+00

-3.6811E+00

7.2090E+00

-9.8842E+00

S4

-1.3842E-02

-1.1361E-01

1.1181E+00

-6.2265E+00

2.2689E+01

-5.6433E+01

9.8637E+01

S5

-3.5354E-03

-1.8281E-01

1.2789E+00

-6.4300E+00

2.1727E+01

-5.0864E+01

8.4408E+01

S6

-4.6344E-02

-2.3909E-01

1.5744E+00

-5.5384E+00

1.2487E+01

-1.9479E+01

2.1735E+01

S7

-1.4285E-01

1.2830E-02

5.3939E-01

-1.9964E+00

4.1356E+00

-5.7538E+00

5.6683E+00

S8

-1.5994E-01

1.3910E-01

-1.6339E-01

1.9830E-01

-2.3072E-01

2.3262E-01

-1.8764E-01

S9

-7.9163E-02

1.0934E-01

-2.9926E-01

5.9744E-01

-8.3281E-01

8.1916E-01

-5.7716E-01

S10

-8.2479E-02

1.5088E-01

-2.6134E-01

3.4950E-01

-3.4297E-01

2.4429E-01

-1.2615E-01

S11

-3.9043E-01

2.6329E-01

-1.5410E-01

7.9080E-02

-3.2693E-02

1.0194E-02

-2.3056E-03

S12

-3.8053E-01

3.0266E-01

-2.0190E-01

1.0490E-01

-4.1306E-02

1.2218E-02

-2.7081E-03

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-1.1291E+00

7.2705E-01

-3.2620E-01

1.0001E-01

-1.9981E-02

2.3442E-03

-1.2252E-04

S2

4.5276E+00

-2.9709E+00

1.3757E+00

-4.3923E-01

9.1973E-02

-1.1363E-02

6.2754E-04

S3

9.6470E+00

-6.7310E+00

3.3298E+00

-1.1395E+00

2.5636E-01

-3.4085E-02

2.0284E-03

S4

-1.2312E+02

1.1020E+02

-7.0155E+01

3.0992E+01

-9.0278E+00

1.5589E+00

-1.2083E-01

S5

-1.0056E+02

8.6206E+01

-5.2661E+01

2.2349E+01

-6.2571E+00

1.0386E+00

-7.7366E-02

S6

-1.7611E+01

1.0389E+01

-4.4177E+00

1.3187E+00

-2.6202E-01

3.1100E-02

-1.6667E-03

S7

-4.0451E+00

2.1091E+00

-7.9920E-01

2.1499E-01

-3.8985E-02

4.2756E-03

-2.1419E-04

S8

1.1510E-01

-5.1840E-02

1.6648E-02

-3.6839E-03

5.3201E-04

-4.5082E-05

1.7002E-06

S9

2.9364E-01

-1.0781E-01

2.8243E-02

-5.1422E-03

6.1751E-04

-4.3936E-05

1.4018E-06

S10

4.7144E-02

-1.2668E-02

2.4138E-03

-3.1743E-04

2.7366E-05

-1.3912E-06

3.1614E-08

S11

3.7037E-04

-4.1443E-05

3.1238E-06

-1.4769E-07

3.6385E-09

-1.4219E-11

-8.6677E-13

S12

4.4845E-04

-5.5033E-05

4.9232E-06

-3.1147E-07

1.3188E-08

-3.3495E-10

3.8557E-12

TABLE 12

Fig. 27 shows axial chromatic aberration curves of the imaging lens group of example six, which show the deviation of the focal point of light rays of different wavelengths after passing through the imaging lens group. Fig. 28 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens group of example six. Fig. 29 shows distortion curves of the imaging lens group of example six, which show values of distortion magnitudes corresponding to different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the imaging lens group of example six, which shows the deviation of light rays at different image heights on the image forming surface after passing through the imaging lens group.

As can be seen from fig. 27 to 30, the imaging lens group according to example six can achieve good image quality.

To sum up, examples one to six satisfy the relationships shown in table 13, respectively.

Watch 13

Table 14 shows the effective focal lengths f of the image pickup lens groups of examples one to six, and the effective focal lengths f1 to f6 of the respective lenses.

Example parameters	1	2	3	4	5	6
							f1(mm)	5.49	5.51	5.18	6.39	6.47	5.74
f2(mm)	-22.40	-25.26	-17.33	142.65	181.52	-43.16
							f3(mm)	25.48	48.82	-66.69	-66.69	-69.17	-58.84
f4(mm)	-5.75	-6.33	-30.28	-19.21	-20.39	-24.62
							f5(mm)	3.37	3.34	4.20	4.21	4.24	4.30
f6(mm)	-4.69	-4.60	-4.25	-4.25	-4.28	-4.33
							f(mm)	4.94	4.94	4.93	4.94	4.91	4.93
TTL(mm)	6.09	6.10	6.19	6.18	6.21	6.21
							ImgH(mm)	4.16	4.18	4.06	4.22	4.15	4.17

TABLE 14

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

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection 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 example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of 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 claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement 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 capturing lens assembly, comprising, from an object side to an image side:

a first lens element with positive refractive power, the first lens element having a convex object-side surface and a concave image-side surface;

a second lens element with refractive power, the second lens element having a convex object-side surface and a concave image-side surface;

a third lens with refractive power;

a fourth lens element with negative refractive power, an image side surface of the fourth lens element being concave;

a fifth lens element with positive refractive power, wherein an object-side surface of the fifth lens element is convex and an image-side surface of the fifth lens element is convex;

a sixth lens element with negative refractive power, the sixth lens element having a convex object-side surface and a concave image-side surface;

wherein, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the imaging lens group, the effective half aperture DT31 of the object side surface of the third lens and the effective half aperture DT22 of the image side surface of the second lens satisfy: 1.4< ImgH/(DT22+ DT31) < 1.8.

2. The imaging lens group according to claim 1, wherein an effective focal length f1 of the first lens element and an effective focal length f5 of the fifth lens element satisfy: 1.1< f1/f5< 1.8.

3. The imaging lens group of claim 1, wherein 0< f6/f4<1 is satisfied between the effective focal length f6 of the sixth lens element and the effective focal length f4 of the fourth lens element.

4. The imaging lens group according to claim 1, wherein a radius of curvature R1 of the object-side surface of the first lens element, a radius of curvature R2 of the image-side surface of the first lens element, a radius of curvature R3 of the object-side surface of the second lens element, and a radius of curvature R4 of the image-side surface of the second lens element satisfy: 0.8< (R1+ R2)/(R3+ R4) < 1.3.

5. The set of imaging lenses of claim 1, wherein the effective focal length f of the set of imaging lenses, the radius of curvature R8 of the image-side surface of the fourth lens element, the radius of curvature R9 of the object-side surface of the fifth lens element, and the radius of curvature R10 of the image-side surface of the fifth lens element satisfy: 0.6< (R8+ R9+ R10)/f < 2.0.

6. The imaging lens group according to claim 1, wherein a radius of curvature R11 of an object side surface of the sixth lens element and a radius of curvature R12 of an image side surface of the sixth lens element satisfy: 2.0< (R11+ R12)/(R11-R12) < 2.8.

7. The imaging lens group according to claim 1, wherein a maximum field angle of the imaging lens group satisfies FOV: 70 < FOV < 85.

8. The imaging lens group according to claim 1, wherein a combined focal length f56 of the fifth and sixth lenses and a combined focal length f12 of the first and second lenses satisfy: 0.2< f12/f56< 1.3.

9. The imaging lens group of claim 1, wherein an on-axis distance TTL between an object-side surface of the first lens element and an image plane of the imaging lens group, an air space T23 between the second lens element and the third lens element on the optical axis, and an air space T56 between the fifth lens element and the sixth lens element on the optical axis satisfy: 5.3< TTL/(T23+ T56) < 6.3.

10. The imaging lens group according to claim 1, wherein an on-axis distance SAG52 between an intersection point of an image side surface of the fifth lens and an optical axis and an effective radius vertex of the image side surface of the fifth lens, an on-axis distance SAG42 between an intersection point of an image side surface of the fourth lens and the optical axis and an effective radius vertex of the image side surface of the fourth lens, and an on-axis distance SAG41 between an intersection point of an object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the fourth lens satisfy: 0.7< SAG52/(SAG41+ SAG42) < 1.6.

11. The imaging lens group according to claim 1, wherein an on-axis distance SAG62 between an intersection point of an image side surface and an optical axis of the sixth lens and an effective radius vertex of the image side surface of the sixth lens, and an on-axis distance SAG61 between an intersection point of an object side surface of the sixth lens and the optical axis and an effective radius vertex of the object side surface of the sixth lens satisfy: 0.7< SAG61/SAG62< 1.2.

12. The set of imaging lenses of claim 1, wherein the edge thickness ET6 of the sixth lens piece and the edge thickness ET5 of the fifth lens piece satisfy: 1.0< ET6/ET5< 1.8.

13. An image capturing lens assembly, comprising, from an object side to an image side:

a third lens with refractive power;

an axial distance TTL between an object side surface of the first lens and an imaging surface of the image capturing lens group, an air space T23 on the optical axis between the second lens and the third lens, and an air space T56 on the optical axis between the fifth lens and the sixth lens satisfy: 5.3< TTL/(T23+ T56) < 6.3.

14. The imaging lens group according to claim 13, wherein an effective focal length f1 of the first lens element and an effective focal length f5 of the fifth lens element satisfy: 1.1< f1/f5< 1.8.

15. The imaging lens assembly of claim 13, wherein 0< f6/f4<1 is satisfied between the effective focal length f6 of the sixth lens element and the effective focal length f4 of the fourth lens element.

16. The imaging lens group of claim 13, wherein the radius of curvature R1 of the object-side surface of the first lens element, the radius of curvature R2 of the image-side surface of the first lens element, the radius of curvature R3 of the object-side surface of the second lens element, and the radius of curvature R4 of the image-side surface of the second lens element satisfy: 0.8< (R1+ R2)/(R3+ R4) < 1.3.

17. The set of imaging lenses of claim 13, wherein the effective focal length f of the set of imaging lenses, the radius of curvature R8 of the image-side surface of the fourth lens element, the radius of curvature R9 of the object-side surface of the fifth lens element, and the radius of curvature R10 of the image-side surface of the fifth lens element satisfy: 0.6< (R8+ R9+ R10)/f < 2.0.

18. The imaging lens group according to claim 13, wherein a radius of curvature R11 of the object-side surface of the sixth lens element and a radius of curvature R12 of the image-side surface of the sixth lens element satisfy: 2.0< (R11+ R12)/(R11-R12) < 2.8.

19. The imaging lens group of claim 13, wherein the maximum field angle of the imaging lens group satisfies FOV: 70 ° < FOV <85 °.

20. The imaging lens group according to claim 13, wherein a combined focal length f56 of the fifth and sixth lenses and a combined focal length f12 of the first and second lenses satisfy: 0.2< f12/f56< 1.3.

21. The imaging lens group according to claim 13, wherein an on-axis distance SAG52 between an intersection point of the image-side surface of the fifth lens element and the optical axis and an effective radius vertex of the image-side surface of the fifth lens element, an on-axis distance SAG42 between an intersection point of the image-side surface of the fourth lens element and the optical axis and an effective radius vertex of the image-side surface of the fourth lens element, and an on-axis distance SAG41 between an intersection point of the object-side surface of the fourth lens element and the optical axis and an effective radius vertex of the object-side surface of the fourth lens element satisfy: 0.7< SAG52/(SAG41+ SAG42) < 1.6.

22. The imaging lens group according to claim 13, wherein an on-axis distance SAG62 between an intersection point of an image side surface and an optical axis of the sixth lens and an effective radius vertex of the image side surface of the sixth lens, and an on-axis distance SAG61 between an intersection point of an object side surface of the sixth lens and the optical axis and an effective radius vertex of the object side surface of the sixth lens satisfy: 0.7< SAG61/SAG62< 1.2.

23. The imaging lens group according to claim 13, wherein an edge thickness ET6 of the sixth lens piece and an edge thickness ET5 of the fifth lens piece satisfy: 1.0< ET6/ET5< 1.8.