CN217213296U

CN217213296U - Camera lens group

Info

Publication number: CN217213296U
Application number: CN202220514376.4U
Authority: CN
Inventors: 郭彦玲; 邢天祥; 黄林; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-08-16
Anticipated expiration: 2032-03-09

Abstract

The utility model provides a lens group makes a video recording. The image pickup lens group comprises from the object side to the image side: a first lens having a positive optical power; a second lens having a focal power; a third lens having an optical power; a fourth lens having an optical power; a fifth lens having a positive optical power; a sixth lens having an optical power; the side surface of a shot object of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the side surface of the shot object of the sixth lens is a convex surface; the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy the following condition: -4.0 < f6/f5 < -2.0. The utility model provides a lens group of making a video recording among the prior art have the problem that functional and miniaturized difficult compromise simultaneously.

Description

Camera lens group

Technical Field

The utility model relates to an optics camera equipment technical field particularly, relates to a lens group of making a video recording.

Background

At present, mobile phone photographing has become the mainstream choice of people, and the demand for the front-mounted camera lens group on the mobile phone is no longer the simple demand for clear photographing, and the function of beautifying is needed, in addition, some users also need the front-mounted camera lens group to have more new functions, for example, the front-mounted camera lens group which can be freely switched among different functions is usually completed by matching two or more than two lenses, such as supporting portrait mode, portrait lighting effect, and being capable of automatically switching to wide angle. With the trend of mobile phones toward full-screen, the improvement of the screen ratio is beneficial to the improvement of the competitiveness of mobile phone brands, so that the miniaturization of the front camera lens group of the mobile phone is a development trend of the front camera lens group in the future.

That is, the imaging lens group in the related art has a problem that both the functionalization and the miniaturization are difficult to be achieved at the same time.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a camera lens assembly to solve the problem of camera lens assembly in the prior art that is difficult to be taken into account simultaneously with the functionalization and miniaturization.

In order to achieve the above object, according to an aspect of the present invention, there is provided an imaging lens assembly, comprising, in order from an object side to an image side: a first lens having a positive optical power; a second lens having an optical power; a third lens having an optical power; a fourth lens having an optical power; a fifth lens having a positive optical power; a sixth lens having an optical power; the side surface of a shot object of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the side surface of the shot object of the sixth lens is a convex surface; the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy the following condition: -4.0 < f6/f5 < -2.0.

Further, satisfy between the effective focal length f of lens group of making a video recording and the entrance pupil diameter EPD of lens group of making a video recording: f/EPD is less than or equal to 2.5.

Further, the maximum field angle FOV of the imaging lens group satisfies: 85 < FOV < 95.

Further, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -3.5 < f2/f1 < -1.5.

Further, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy the following condition: -2.0. ltoreq. f3/f4 < -1.5.

Furthermore, the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f of the image pickup lens group satisfy the following conditions: 0 < (R7+ R8)/f/10 < 2.0.

Further, an on-axis distance SAG61 between an intersection point of the subject side surface of the sixth lens and the optical axis and an effective radius vertex of the subject side surface of the sixth lens and an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis and an effective radius vertex of the image side surface of the sixth lens satisfy: 1.5 < SAG62/SAG61 < 2.5.

Further, the combined focal length f12 of the first lens and the second lens and the effective focal length f of the image pickup lens group satisfy: f12/f is more than 1.5 and less than 2.0.

Further, the combined focal length f34 of the third lens and the fourth lens and the effective focal length f of the image pickup lens group satisfy: f34/f is not less than-3.5 and not more than-2.0.

Further, the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens and the effective focal length f of the image pickup lens group satisfy the following condition: -6.0 < f456/f < -2.0.

Further, the central thickness CT3 of the third lens on the optical axis and the edge thickness ET3 of the third lens satisfy: 1.0 < CT3/ET3 < 2.0.

Further, an air space T23 of the second lens and the third lens on the optical axis and an air space T45 of the fourth lens and the fifth lens on the optical axis satisfy: T34/T23 is more than 1.5 and less than or equal to 3.0.

Further, the center thickness CT6 of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens satisfy: 1.0 < CT6/ET6 < 2.0.

Further, the combined focal length f234 of the second, third and fourth lenses and the combined focal length f345 of the third, fourth and fifth lenses satisfy: -2.5 < f345/f234 < -1.0.

Furthermore, the image pickup lens group at least comprises three lenses with Abbe numbers smaller than 25.

According to the utility model discloses an on the other hand provides a lens group makes a video recording, includes by the object side to the picture side in proper order: a first lens having a positive optical power; a second lens having an optical power; a third lens having an optical power; a fourth lens having an optical power; a fifth lens having a positive optical power; a sixth lens having an optical power; the side surface of a shot object of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the side surface of the shot object of the sixth lens is a convex surface; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following condition: -3.5 < f2/f1 < -1.5.

Further, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -4.0 < f6/f5 < -2.0; the effective focal length f of the camera lens group and the entrance pupil diameter EPD of the camera lens group satisfy: f/EPD is less than or equal to 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 to an effective radius vertex of the object side surface of the sixth lens and an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis to an effective radius vertex of the image side surface of the sixth lens satisfy: 1.5 < SAG62/SAG61 < 2.5.

By applying the technical scheme of the utility model, the camera 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 in sequence, and the first lens has positive focal power; the second lens has focal power; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power; the sixth lens has focal power; the side surface of a shot object of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the side surface of the shot object of the sixth lens is a convex surface; the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy the following condition: -4.0 < f6/f5 < -2.0.

By reasonably configuring the focal power of each lens, when the focal power of the first lens is positive, the inclination angle of incident light rays is favorably reduced, so that the large field of view of an object space is effectively shared, and a larger field angle range is obtained. The side surface of the object to be shot of the fourth lens is a concave surface, and the side surface of the image is a concave surface, so that the relative illumination of the off-axis field of view can be improved. Focal power through setting up the fifth lens is positive, and its object side of being shot is the convex surface, and the image side is the concave surface, mainly enables central field of view light to have fine ability of assembling, improves system spherical aberration, and the fifth lens that has positive focal power can guarantee that marginal field of view light excessively diverges for the system has better coma correction ability. The object side of the sixth lens is convex, which is helpful to shorten the total length of the system and realize the miniaturization of the module. In addition, the focal power of the system can be reasonably distributed by constraining the relation between the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens, so that the positive spherical aberration and the negative spherical aberration of the front group of lenses and the rear group of lenses are mutually offset, and the imaging quality is ensured.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a camera lens assembly according to a first embodiment 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 a second imaging lens group according to an example of the present invention;

fig. 7 to 10 respectively 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. 6;

fig. 11 is a schematic structural view of a third imaging lens group according to an 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, respectively, of the imaging lens group in fig. 11;

fig. 16 is a schematic structural view of a fourth imaging lens group according to 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 structural view 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, respectively, of the imaging lens group in fig. 21;

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

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 side surface of the object to be shot of the first lens; s2, the image side surface of the first lens; e2, a second lens; s3, the object side of the second lens; s4, the image side surface of the second lens; e3, third lens; s5, the subject side surface of the third lens; s6, the image side surface of the third lens; e4, fourth lens; s7, the subject side surface of the fourth lens; s8, the image side surface of the fourth lens; e5, fifth lens; s9, the subject side surface of the fifth lens; s10, the image side surface of the fifth lens; e6, sixth lens; s11, the subject side surface of the sixth lens; s12, the image side surface of the sixth lens; e7, optical filters; s13, the side of the object to be shot of the optical filter; s14, the image side surface of the optical filter; 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 accompanying drawings in conjunction with embodiments.

It is 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 application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; similarly, "inner and outer" refer to the inner and outer relative to the contours of the components themselves for ease of understanding and description, but the above directional terms are not intended to limit the invention.

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 the convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side becomes the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. 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. Regarding the side of the object, when the R value is positive, the side is judged to be convex, and when the R value is negative, the side is judged to be concave; in the case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.

In order to solve the problem that the lens group of making a video recording among the prior art has functionalization and miniaturized difficult compromise simultaneously, the utility model provides a lens group of making a video recording.

Example one

As shown in fig. 1 to fig. 30, the image capturing lens assembly includes, in order from a subject side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens has positive power; the second lens has focal power; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power; the sixth lens has focal power; the side surface of a shot object of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the side surface of the shot object of the sixth lens is a convex surface; the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy the following condition: -4.0 < f6/f5 < -2.0.

In this embodiment, the effective focal length f of the imaging lens group and the entrance pupil diameter EPD of the imaging lens group satisfy: f/EPD is less than or equal to 2.5. The ratio of the effective focal length F of the camera lens group to the entrance pupil diameter EPD of the camera lens group is restricted within a reasonable range, so that the F number of the system is less than 2.5, and the characteristic of large aperture of the system can be realized.

In the present embodiment, the maximum field angle FOV of the imaging lens group satisfies: 85 < FOV < 95. The imaging range of the image pickup lens group is effectively controlled by restricting the maximum field angle FOV of the image pickup lens group to be in the range of 85 ° to 95 °. Preferably, 86 ° < FOV < 92 °.

In the present embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -3.5 < f2/f1 < -1.5. The condition is satisfied, which is beneficial to sharing the large view field of the object space and correcting the off-axis aberration of the rear lens group, thereby improving the imaging quality of the camera lens group. Preferably, -3.3 < f2/f1 < -1.5.

In the present embodiment, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: -2.0. ltoreq. f3/f4 < -1.5. The conditional expression is satisfied, the focal power ratio of the two lenses is adjusted within a certain range, and the off-axis aberration of the system is balanced.

In the present embodiment, the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, and the effective focal length f of the imaging lens group satisfy: 0 < (R7+ R8)/f/10 < 2.0. Satisfying the conditional expression, the optical distortion can be reduced, and better imaging quality is ensured. Preferably 0.4 < (R7+ R8)/f/10 < 1.6.

In this embodiment, an on-axis distance SAG61 between an intersection point of the object side surface of the sixth lens and the optical axis to an effective radius vertex of the object side surface of the sixth lens and an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis to an effective radius vertex of the image side surface of the sixth lens satisfy: 1.5 < SAG62/SAG61 < 2.5. The condition is satisfied, and the relation between the miniaturization of the module and the relative illumination of the off-axis field is favorably realized in a better balanced manner. Preferably 1.8 < SAG62/SAG61 < 2.5.

In this embodiment, the combined focal length f12 of the first and second lenses and the effective focal length f of the image capturing lens set satisfy: f12/f is more than 1.5 and less than 2.0. The conditional expression is satisfied, the contribution range of the focal power can be reasonably controlled, and meanwhile, the contribution rate of the secondary spherical aberration of the first lens can be reasonably controlled, so that the positive focal power of the first lens can be reasonably balanced. Preferably, 1.5 < f12/f < 1.8.

In this embodiment, the combined focal length f34 of the third and fourth lenses and the effective focal length f of the image capturing lens group satisfy: f34/f is more than or equal to minus 3.5 and less than or equal to minus 2.0. The conditional expression is satisfied, the contribution range of focal power can be reasonably controlled, and meanwhile, the contribution rate of the secondary spherical aberration of the optical system is reasonably controlled, so that good imaging quality is obtained, and the effect of high resolving power is realized.

In this embodiment, the combined focal length f456 of the fourth lens element, the fifth lens element and the sixth lens element and the effective focal length f of the image capturing lens group satisfy: -6.0 < f456/f < -2.0. The optical lens group with the reasonable negative focal power can be combined from the fourth lens to the sixth lens to be used as the optical lens group with the reasonable negative focal power to balance the aberration generated by the optical lens group with the positive focal power at the front end, and therefore good imaging quality is obtained. Preferably, -5.9 < f456/f < -2.1.

In the present embodiment, the central thickness CT3 of the third lens on the optical axis and the edge thickness ET3 of the third lens satisfy: 1.0 < CT3/ET3 < 2.0. The conditional expression is satisfied, so that the distortion contribution of each field of view of the system is controlled within a reasonable range, and the imaging quality is improved. Preferably, 1.0 < CT3/ET3 < 1.6.

In the present embodiment, an air space T23 of the second and third lenses on the optical axis and an air space T45 of the fourth and fifth lenses on the optical axis satisfy: T34/T23 is more than 1.5 and less than or equal to 3.0. The method meets the conditional expression, can effectively ensure the field curvature and distortion of the system, and thus ensures that the off-axis field has good imaging quality. Preferably, 1.7 < T34/T23 ≦ 3.0.

In the present embodiment, the central thickness CT6 of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens satisfy: 1.0 < CT6/ET6 < 2.0. The condition formula is satisfied, so that the sixth lens is easy to perform injection molding, the system processability is improved, and meanwhile, better imaging quality is ensured. Preferably, 1.2 < CT6/ET6 < 1.8.

In the present embodiment, the combined focal length f234 of the second, third and fourth lenses and the combined focal length f345 of the third, fourth and fifth lenses satisfy: -2.5 < f345/f234 < -1.0. The focal power of the system can be reasonably distributed when the conditional expression is met, so that the positive spherical aberration and the negative spherical aberration of the front group of lenses and the rear group of lenses are mutually offset. Preferably, -2.3 < f345/f234 < -1.0.

In this embodiment, the image capturing lens group at least includes three lenses with abbe numbers smaller than 25. By arranging at least three lenses made of high-refractive-index materials, the balance of chromatic aberration is facilitated, and the imaging quality is improved.

Example two

As shown in fig. 1 to 30, the image capturing lens assembly includes, in order 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, wherein the first lens has a positive refractive power; the second lens has focal power; the third lens has focal power; the fourth lens has focal power; the fifth lens has positive focal power; the sixth lens has focal power; the side surface of a shot object of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the side surface of the shot object of the sixth lens is a convex surface; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following condition: -3.5 < f2/f1 < -1.5.

Preferably, -3.3 < f2/f1 < -1.5.

By reasonably configuring the focal power of each lens, when the focal power of the first lens is positive, the inclination angle of incident light rays is favorably reduced, so that the large field of view of an object space is effectively shared, and a larger field angle range is obtained. The side surface of the object to be shot of the fourth lens is a concave surface, and the side surface of the image is a concave surface, so that the relative illumination of the off-axis field of view can be improved. Focal power through setting up the fifth lens is positive, and its object side of being shot is the convex surface, and the image side is the concave surface, mainly enables central field of view light to have fine ability of assembling, improves system spherical aberration, and the fifth lens that has positive focal power can guarantee that marginal field of view light excessively diverges for the system has better coma correction ability. The object side of the sixth lens is convex, which is helpful to shorten the total length of the system and realize the miniaturization of the module. In addition, the relationship between the effective focal length f1 of the first lens and the effective focal length f2 of the second lens is restrained, so that the large object field of view is shared, the off-axis aberration of the rear lens group is corrected, and the imaging quality of the camera lens group is improved.

In the present embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -4.0 < f6/f5 < -2.0. Through restraining the relation between the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens, the focal power of the system can be reasonably distributed, so that the positive spherical aberration and the negative spherical aberration of the front group of lenses and the rear group of lenses are mutually offset, and the imaging quality is ensured.

In the present embodiment, the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, and the effective focal length f of the imaging lens group satisfy: 0 < (R7+ R8)/f/10 < 2.0. Satisfying the conditional expression, the optical distortion can be reduced, and better imaging quality is ensured. Preferably, 0.4 < (R7+ R8)/f/10 < 1.6.

In this embodiment, the combined focal length f34 of the third and fourth lenses and the effective focal length f of the image capturing lens group satisfy: f34/f is not less than-3.5 and not more than-2.0. The conditional expression is satisfied, the contribution range of focal power can be reasonably controlled, and meanwhile, the contribution rate of the secondary spherical aberration of the optical system is reasonably controlled, so that good imaging quality is obtained, and the effect of high resolving power is realized.

In the present embodiment, an air space T23 of the second lens and the third lens on the optical axis and an air space T45 of the fourth lens and the fifth lens on the optical axis satisfy: T34/T23 is more than 1.5 and less than or equal to 3.0. The method meets the conditional expression, can effectively ensure the field curvature and distortion of the system, and thus ensures that the off-axis field has good imaging quality. Preferably, 1.7 < T34/T23 ≦ 3.0.

In the present embodiment, the central thickness CT6 of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens satisfy: 1.0 < CT6/ET6 < 2.0. The conditional expression is satisfied, so that the sixth lens is easy to perform injection molding, the system processability is improved, and meanwhile, better imaging quality is guaranteed. Preferably, 1.2 < CT6/ET6 < 1.8.

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 an image forming surface.

The imaging lens group in the present application may employ a plurality of lenses, for example, the six lenses described above. 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 by reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, 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. The camera lens group also has the advantages of ultra-thinness and good imaging quality, and can meet the requirement of miniaturization of intelligent electronic products.

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: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a sixth mirror E6, a filter E7, and an image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 3.24mm, the maximum half field angle Semi-FOV of the imaging lens group is 43.9 °, the total length TTL of the imaging lens group is 4.05mm, and the image height ImgH is 3.38 mm.

Table 1 shows a basic structural 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 radius of curvature are 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 to the sixth lens E6 are aspheric surfaces, and the surface shape of each aspheric surface lens can be defined by, but is not limited to, the following aspheric surface formula:

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

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 example and the following examples, descriptions of parts 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: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a sixth mirror E6, a filter E7, and an image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 3.25mm, the maximum half field angle Semi-FOV of the imaging lens group is 43.9 °, the total length TTL of the imaging lens group is 4.05mm, and the image height ImgH is 3.38 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 radius of curvature are 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 image pickup lens assembly of the second example 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 diagram showing a configuration of an imaging lens group of example three.

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

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

In this example, the total effective focal length f of the imaging lens group is 3.22mm, the maximum half field angle Semi-FOV of the imaging lens group is 45.0 °, the total length TTL of the imaging lens group is 4.05mm, and the image height ImgH is 3.38 mm.

Table 5 shows a basic structural parameter table of the image pickup lens group of example three, in which the units of the radius of curvature, the thickness/distance, and the radius of curvature are 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: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a sixth mirror E6, a filter E7, and an image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 3.29mm, the maximum half field angle Semi-FOV of the imaging lens group is 43.3 °, the total length TTL of the imaging lens group is 4.05mm, and the image height ImgH is 3.38 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 radius of curvature 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.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

6.2549E-03

6.7378E-04

4.8178E-05

1.7732E-06

8.3898E-06

8.3227E-07

1.3293E-06

S2

-1.3660E-02

-1.6155E-03

-4.1983E-04

6.8896E-05

7.8085E-05

3.9765E-05

1.3001E-05

S3

-7.4530E-02

2.0854E-03

1.5508E-04

1.0216E-03

5.2601E-04

2.2716E-04

5.2076E-05

S4

-5.7997E-02

8.4929E-03

3.1391E-04

3.8721E-04

1.3540E-04

4.3508E-05

1.1156E-05

S5

-2.7481E-02

-4.8822E-03

-6.3023E-04

-1.2001E-04

-1.4564E-04

1.6797E-06

-2.0024E-05

S6

6.9115E-03

1.3318E-03

-1.9921E-04

7.5969E-04

-2.0519E-04

1.3143E-04

-1.1272E-05

S7

-2.0968E-01

8.0505E-02

-2.7677E-02

2.8681E-03

-3.0520E-03

5.5616E-04

-4.5680E-04

S8

-4.4380E-01

1.8608E-01

-5.7770E-02

2.0299E-03

-9.2508E-05

1.4497E-03

1.5815E-04

S9

-9.8314E-01

9.0645E-03

8.7254E-02

-8.3829E-03

-4.0415E-03

-1.1972E-02

3.1727E-03

S10

-2.2621E-01

-2.0549E-01

1.1807E-01

-3.5672E-02

2.2804E-02

-5.9583E-03

1.9292E-03

S11

-3.5083E+00

9.5204E-01

-3.4900E-01

1.1410E-01

-3.1705E-02

6.1294E-03

-3.8930E-03

S12

-5.2644E+00

1.1400E+00

-3.6198E-01

1.1852E-01

-5.1191E-02

2.2411E-02

-1.5167E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

6.9232E-07

-1.4354E-07

-2.0683E-08

0.0000E+00

S2

6.3976E-06

1.8825E-06

0.0000E+00

S3

1.8112E-05

-4.9251E-07

0.0000E+00

S4

-9.8517E-07

5.2896E-06

0.0000E+00

S5

-5.4325E-06

-9.5900E-06

-2.9265E-06

0.0000E+00

S6

1.6883E-05

-1.9348E-05

2.7957E-06

-1.4136E-06

1.7840E-07

0.0000E+00

S7

2.2265E-04

-1.1744E-04

2.2023E-05

-3.4662E-05

3.0830E-05

-1.8236E-05

5.7413E-06

S8

-1.6547E-04

-2.3066E-04

2.9907E-05

1.0165E-04

7.0738E-05

-6.7055E-05

2.6204E-05

S9

2.6896E-03

1.1645E-03

-1.2826E-03

-1.4262E-04

-1.1492E-05

2.9472E-04

8.3820E-05

S10

-8.9381E-04

-9.3161E-04

-2.1379E-04

3.3892E-05

6.7982E-05

7.7478E-05

-8.1436E-06

S11

6.1035E-03

-3.9162E-03

5.1809E-04

9.6490E-04

-9.5473E-04

4.6075E-04

-1.2986E-04

S12

6.5113E-03

-1.2989E-03

1.0594E-03

-6.0415E-04

1.9237E-04

-5.7699E-05

1.2409E-05

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 astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging 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 diagram showing a configuration of an imaging lens group of example five.

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

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

In this example, the total effective focal length f of the imaging lens group is 3.24mm, the maximum half field angle Semi-FOV of the imaging lens group is 44.1 °, the total length TTL of the imaging lens group is 4.05mm, and the image height ImgH is 3.38 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, the thickness/distance, and the radius of curvature are millimeters (mm).

TABLE 9

Table 10 shows the high-order term coefficients that can be used for each aspherical mirror surface in example five, 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

6.3287E-03

8.5507E-04

6.1299E-05

1.4509E-05

3.1361E-06

4.6649E-06

6.6155E-07

S2

-1.2284E-02

-2.2962E-03

-5.2349E-04

5.3510E-05

1.1423E-04

6.9518E-05

2.7745E-05

S3

-7.6576E-02

1.4787E-03

5.2074E-04

8.5172E-04

6.0573E-04

2.7147E-04

7.5180E-05

S4

-5.5637E-02

8.5346E-03

1.3153E-03

2.5096E-04

1.6663E-04

5.7645E-05

1.8250E-05

S5

-3.2356E-02

-4.3805E-03

-2.1264E-04

-4.4636E-04

-1.7593E-04

-3.6986E-05

-2.2689E-05

S6

9.3975E-03

4.3222E-04

3.5929E-04

7.0493E-04

5.3914E-05

1.0261E-04

-2.8206E-05

S7

-2.1621E-01

7.9761E-02

-2.8090E-02

3.4751E-03

-3.0402E-03

5.7422E-04

-4.8052E-04

S8

-4.3741E-01

1.8724E-01

-5.6315E-02

2.7732E-03

1.6176E-04

1.2985E-03

2.3697E-04

S9

-9.8771E-01

1.0860E-02

8.7032E-02

-8.9821E-03

-2.9862E-03

-1.2158E-02

2.3911E-03

S10

-2.0745E-01

-2.0469E-01

1.1840E-01

-3.5447E-02

2.2512E-02

-6.2198E-03

1.5133E-03

S11

-3.5011E+00

9.5270E-01

-3.5020E-01

1.1345E-01

-3.1721E-02

6.1127E-03

-3.6046E-03

S12

-5.1994E+00

1.1352E+00

-3.6453E-01

1.1881E-01

-5.1225E-02

2.2866E-02

-1.5304E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

1.2482E-06

-9.2485E-07

3.9086E-08

0.0000E+00

S2

9.0643E-06

2.4078E-06

0.0000E+00

S3

9.3350E-06

-3.9340E-06

0.0000E+00

S4

-3.3062E-06

-8.6255E-07

0.0000E+00

S5

-2.2530E-05

-2.2192E-05

-6.2736E-06

0.0000E+00

S6

-6.2942E-05

-6.0234E-05

-1.5689E-05

1.0366E-06

1.3775E-07

0.0000E+00

S7

1.8542E-04

-8.6468E-05

1.5114E-05

-2.7120E-05

2.1237E-05

-1.2831E-05

4.2540E-06

S8

-2.1182E-04

-1.6615E-04

-4.9473E-05

1.1215E-04

2.9573E-05

-3.8614E-05

8.3616E-06

S9

2.3456E-03

1.0900E-03

-1.2038E-03

-5.4371E-05

-6.9187E-05

2.4353E-04

2.3771E-05

S10

-9.0720E-04

-1.0045E-03

-1.1914E-04

1.6155E-04

5.7514E-05

1.0460E-04

-6.7317E-05

S11

6.1319E-03

-3.8487E-03

5.1809E-04

8.8183E-04

-9.9968E-04

4.8345E-04

-8.5168E-05

S12

6.4835E-03

-1.2975E-03

1.0455E-03

-6.1191E-04

1.6801E-04

-6.1257E-05

1.1886E-05

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 image pickup 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: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a sixth mirror E6, a filter E7, and an image plane S15.

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

In this example, the total effective focal length f of the imaging lens group is 3.22mm, the maximum half field angle Semi-FOV of the imaging lens group is 45.8 °, the total length TTL of the imaging lens group is 4.05mm, and the image height ImgH is 3.38 mm.

Table 11 shows a basic structural parameter table of the image pickup lens group of example six, in which the units of the radius of curvature, the thickness/distance, and the radius of curvature are millimeters (mm).

TABLE 11

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

5.1460E-03

6.6436E-04

7.5791E-05

4.6056E-05

1.7592E-05

1.0512E-05

3.3431E-06

S2

-1.5324E-02

-1.0430E-03

1.5792E-04

2.2040E-04

1.2089E-04

4.3769E-05

2.0419E-05

S3

-7.2058E-02

1.8510E-03

7.2088E-04

4.1074E-04

2.1726E-04

7.7044E-05

2.2291E-05

S4

-5.7223E-02

7.7795E-03

1.3314E-03

3.0219E-04

1.7957E-04

4.7254E-05

1.5166E-06

S5

-2.7589E-02

-4.9615E-03

-4.5728E-05

6.9384E-05

1.7982E-04

1.6349E-04

1.3041E-05

S6

-2.2041E-03

3.6166E-03

-4.4088E-04

9.2392E-04

3.1175E-04

5.3069E-04

1.8455E-04

S7

-2.2905E-01

7.7888E-02

-2.8690E-02

2.0904E-03

-2.3777E-03

1.3746E-03

-7.3961E-06

S8

-4.3542E-01

1.8602E-01

-5.6996E-02

2.9183E-03

-3.9270E-04

1.8863E-03

-1.8295E-04

S9

-9.8221E-01

5.6434E-03

8.9366E-02

-6.8552E-03

-5.3827E-03

-1.1404E-02

3.6841E-03

S10

-2.8481E-01

-1.8207E-01

1.2316E-01

-3.5763E-02

2.2194E-02

-8.1010E-03

1.9245E-03

S11

-3.4321E+00

9.6318E-01

-3.5059E-01

1.1492E-01

-3.3742E-02

6.2854E-03

-3.5589E-03

S12

-5.3827E+00

1.1708E+00

-3.2909E-01

1.1509E-01

-5.8947E-02

2.6579E-02

-1.7777E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

2.4409E-06

1.4373E-06

1.9459E-06

0.0000E+00

S2

7.1327E-06

3.8199E-06

0.0000E+00

S3

1.0364E-05

2.8642E-06

0.0000E+00

S4

1.0042E-07

2.8414E-06

0.0000E+00

S5

-3.0209E-05

-1.9826E-05

-1.3524E-05

0.0000E+00

S6

1.5801E-05

-1.3012E-05

-8.7767E-06

-4.0784E-06

-4.8099E-06

0.0000E+00

S7

-2.1927E-05

-1.1283E-04

1.8756E-06

-3.8666E-05

-1.0724E-05

-1.3870E-05

7.2025E-06

S8

-7.7371E-04

1.5865E-04

1.2088E-04

3.7956E-05

-5.0428E-05

-5.6986E-06

1.1365E-05

S9

1.8406E-03

1.1010E-03

-1.2420E-03

-1.8991E-04

1.5071E-05

2.1983E-04

-5.8441E-05

S10

-2.2188E-03

-2.2219E-04

3.5303E-04

2.8132E-04

2.3558E-04

-1.4919E-04

-5.2184E-05

S11

7.1605E-03

-4.1895E-03

8.8441E-05

9.3092E-04

-3.7756E-04

-2.5424E-04

1.6806E-04

S12

5.8756E-03

-3.3878E-04

3.5644E-03

-1.0946E-03

-4.1707E-04

-6.4010E-04

2.2048E-04

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 image pickup lens group of example six, which shows the deviation of different image heights of light rays on the image plane after passing through the image pickup 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.

Table 13 table 14 shows the effective focal lengths f of the imaging lens groups of examples one to six, and the effective focal lengths f1 to f6 of the respective lenses.

Parameter/example	1	2	3	4	5	6
							f(mm)	3.24	3.25	3.22	3.29	3.24	3.22
f1(mm)	3.45	3.46	3.80	3.35	3.55	3.90
							f2(mm)	-7.00	-7.41	-12.41	-6.47	-10.69	-10.86
f3(mm)	5.51	5.44	5.51	7.20	5.59	5.38
							f4(mm)	-3.06	-2.99	-3.49	-3.68	-2.79	-3.40
f5(mm)	3.45	3.46	3.81	3.46	3.49	3.75
							f6(mm)	-13.75	-13.67	-7.83	-11.44	-13.58	-9.00
TTL(mm)	4.05	4.05	4.05	4.05	4.05	4.05
							ImgH(mm)	3.38	3.38	3.38	3.38	3.38	3.38
Semi-FOV(°)	43.9	43.9	45.0	43.3	44.1	45.8

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 some of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to 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 imaging lens assembly, comprising, in order from an object side to an image side:

a first lens having a positive optical power;

a second lens having an optical power;

a third lens having an optical power;

a fourth lens having an optical power;

a fifth lens having a positive optical power;

a sixth lens having an optical power;

the side surface of a shot object of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the object side surface of the sixth lens is a convex surface; the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -4.0 < f6/f5 < -2.0.

2. The imaging lens assembly of claim 1 wherein an effective focal length f of said imaging lens assembly and an entrance pupil diameter EPD of said imaging lens assembly satisfy: f/EPD is less than or equal to 2.5.

3. The imaging lens group according to claim 1, wherein a maximum field angle FOV of the imaging lens group satisfies: the FOV is more than 85 degrees and less than 95 degrees.

4. The imaging lens group according to claim 1, wherein an effective focal length f1 of the first lens element and an effective focal length f2 of the second lens element satisfy: -3.5 < f2/f1 < -1.5.

5. The imaging lens group according to claim 1, wherein an effective focal length f3 of the third lens element and an effective focal length f4 of the fourth lens element satisfy: -2.0. ltoreq. f3/f4 < -1.5.

6. The imaging lens group according to claim 1, wherein a radius of curvature R7 of an object side surface of the fourth lens, a radius of curvature R8 of an image side surface of the fourth lens, and an effective focal length f of the imaging lens group satisfy: 0 < (R7+ R8)/f/10 < 2.0.

7. The imaging lens group according to claim 1, wherein an on-axis distance SAG61 between an intersection point of an object side surface and an optical axis of the sixth lens and an effective radius vertex of the object side surface of the sixth lens and 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 satisfy: 1.5 < SAG62/SAG61 < 2.5.

8. The set of imaging lenses of claim 1, wherein a combined focal length f12 of the first and second lenses and an effective focal length f of the set of imaging lenses satisfy: f12/f is more than 1.5 and less than 2.0.

9. The set of imaging lenses of claim 1, wherein a combined focal length f34 of the third and fourth lenses and an effective focal length f of the set of imaging lenses satisfy: f34/f is not less than-3.5 and not more than-2.0.

10. The set of imaging lenses of claim 1, wherein a combined focal length f456 of the fourth, fifth and sixth lenses and an effective focal length f of the set of imaging lenses satisfy: -6.0 < f456/f < -2.0.

11. The imaging lens group of claim 1, wherein a center thickness CT3 of the third lens element on the optical axis and an edge thickness ET3 of the third lens element satisfy: 1.0 < CT3/ET3 < 2.0.

12. The imaging lens group according to claim 1, wherein an air space T23 on the optical axis between the second lens and the third lens and an air space T45 on the optical axis between the fourth lens and the fifth lens satisfy: T34/T23 is more than 1.5 and less than or equal to 3.0.

13. The imaging lens group of claim 1, wherein a center thickness CT6 of the sixth lens element on the optical axis and an edge thickness ET6 of the sixth lens element satisfy: 1.0 < CT6/ET6 < 2.0.

14. The imaging lens group according to claim 1, wherein a combined focal length f234 of the second, third and fourth lenses and a combined focal length f345 of the third, fourth and fifth lenses satisfy: -2.5 < f345/f234 < -1.0.

15. The imaging lens assembly of claim 1, wherein said imaging lens assembly comprises at least three lenses having abbe numbers less than 25.

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

a first lens having a positive optical power;

a second lens having an optical power;

a third lens having optical power;

a fourth lens having an optical power;

a fifth lens having a positive optical power;

a sixth lens having an optical power;

the side surface of a shot object of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the object side surface of the sixth lens is a convex surface; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -3.5 < f2/f1 < -1.5.

17. The imaging lens group of claim 16, wherein an effective focal length f5 of the fifth lens element and an effective focal length f6 of the sixth lens element satisfy: -4.0 < f6/f5 < -2.0; the effective focal length f of the camera lens group and the entrance pupil diameter EPD of the camera lens group meet the following requirements: f/EPD is less than or equal to 2.5.

18. The set of imaging lenses of claim 16, wherein the maximum field angle FOV of the set of imaging lenses satisfies: the FOV is more than 85 degrees and less than 95 degrees.

19. The imaging lens group of claim 16, wherein an effective focal length f3 of the third lens element and an effective focal length f4 of the fourth lens element satisfy: -2.0. ltoreq. f3/f4 < -1.5.

20. The imaging lens group of claim 16, wherein a radius of curvature R7 of an object side surface of the fourth lens, a radius of curvature R8 of an image side surface of the fourth lens, and an effective focal length f of the imaging lens group satisfy: 0 < (R7+ R8)/f/10 < 2.0.

21. The imaging lens group according to claim 16, wherein an on-axis distance SAG61 between an intersection point of the 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 and an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis and an effective radius vertex of the image side surface of the sixth lens satisfy: 1.5 < SAG62/SAG61 < 2.5.

22. The set of imaging lenses of claim 16, wherein a combined focal length f12 of the first and second lenses and an effective focal length f of the set of imaging lenses satisfy: f12/f is more than 1.5 and less than 2.0.

23. The set of imaging lenses of claim 16, wherein a combined focal length f34 of the third and fourth lenses and an effective focal length f of the set of imaging lenses satisfy: f34/f is not less than-3.5 and not more than-2.0.

24. The set of imaging lenses of claim 16, wherein a combined focal length f456 of said fourth, fifth and sixth lenses and an effective focal length f of said set of imaging lenses satisfy: -6.0 < f456/f < -2.0.

25. The imaging lens group of claim 16, wherein a center thickness CT3 of the third lens on the optical axis and an edge thickness ET3 of the third lens satisfy: 1.0 < CT3/ET3 < 2.0.

26. The imaging lens group of claim 16, wherein an air space T23 on the optical axis between the second lens and the third lens and an air space T45 on the optical axis between the fourth lens and the fifth lens satisfy: T34/T23 is more than 1.5 and less than or equal to 3.0.

27. The imaging lens group of claim 16, wherein a center thickness CT6 of the sixth lens element on the optical axis and an edge thickness ET6 of the sixth lens element satisfy: 1.0 < CT6/ET6 < 2.0.

28. The set of imaging lenses of claim 16, wherein a combined focal length f234 of the second, third and fourth lenses and a combined focal length f345 of the third, fourth and fifth lenses satisfy: -2.5 < f345/f234 < -1.0.

29. The imaging lens assembly of claim 16 wherein said imaging lens assembly comprises three lenses having abbe numbers less than 25.