CN107490841B

CN107490841B - Image pickup lens group

Info

Publication number: CN107490841B
Application number: CN201710860093.9A
Authority: CN
Inventors: 闻人建科; 李明; 吕赛峰; 叶丽慧
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2017-09-21
Filing date: 2017-09-21
Publication date: 2020-06-23
Anticipated expiration: 2037-09-21
Also published as: CN107490841A

Abstract

The application discloses a lens group makes a video recording, this lens group of making a video recording includes by the thing side to the image side according to the preface along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The second lens has positive focal power, and the object side surface of the second lens is a convex surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; the image side surface of the seventh lens is a concave surface; and the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis satisfy CT4/CT5 > 1.5.

Description

Image pickup lens group

Technical Field

The present application relates to an image pickup lens group, and more particularly, to an image pickup lens group including seven lenses.

Background

With the miniaturization trend of portable electronic products, the requirement of ultra-thin miniaturization is put forward for the camera lens group used in cooperation. Meanwhile, as portable electronic products such as mobile phones and tablet computers are widely used, the camera lens assembly used in combination not only needs to have good imaging quality under the condition of sufficient sunlight or light, but also needs to have better imaging quality under the condition of insufficient light such as cloudy days and dusk. This puts corresponding demands on the high pixel, high resolution, the brightness of the image plane and the clear aperture of the image pickup lens group.

Disclosure of Invention

The present application provides an image pickup lens group applicable to portable electronic products, for example, a large aperture image pickup lens group, which can solve at least or partially at least one of the above-described drawbacks of the related art.

In one aspect, the present application provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The second lens can have positive focal power, and the object side surface of the second lens can be a convex surface; the object side surface of the third lens can be a convex surface, and the image side surface can be a concave surface; the object side surface of the sixth lens element can be convex, and the image side surface can be concave; the image side surface of the seventh lens can be a concave surface; the central thickness CT4 of the fourth lens element on the optical axis and the central thickness CT5 of the fifth lens element on the optical axis satisfy CT4/CT5 > 1.5.

In one embodiment, the total effective focal length f of the image capturing lens group and the entrance pupil diameter EPD of the image capturing lens group can satisfy f/EPD ≦ 1.65.

In one embodiment, the effective focal length f2 of the second lens and the total effective focal length f of the image capture lens group may satisfy 0.5 < f2/f < 1.5.

In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f6 of the sixth lens may satisfy 0.5 < f4/f6 < 2.

In one embodiment, the seventh lens may have a negative power, and its effective focal length f7 and the effective focal length f2 of the second lens may satisfy-1.5 < f7/f2 < -0.5.

In one embodiment, the radius of curvature R6 of the image-side surface of the third lens element and the radius of curvature R4 of the image-side surface of the second lens element satisfy-0.5 < R6/R4 < 0.8.

In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens can satisfy 0 < (R7+ R8)/(R7-R8) ≦ 1.5.

In one embodiment, the total effective focal length f of the image pickup lens group and the radius of curvature R9 of the object-side surface of the fifth lens element satisfy-3.5 < f/R9 < 0.5.

In one embodiment, the effective focal length f5 of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens can satisfy-2 < f5/R10 < 22.

In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens element and the radius of curvature R12 of the image-side surface of the sixth lens element satisfy 1.5 < | R11+ R12|/| R11-R12| < 3.5.

In one embodiment, the radius of curvature R12 of the image-side surface of the sixth lens element and the radius of curvature R11 of the object-side surface of the sixth lens element satisfy 1.5 < R12/R11 < 4.0.

In one embodiment, a separation distance T67 of the sixth lens and the seventh lens on the optical axis and a separation distance T56 of the fifth lens and the sixth lens on the optical axis may satisfy 4 < T67/T56 < 14.

In one embodiment, the central thickness ∑ CT of the first lens element to the seventh lens element on the optical axis and the distance TTL between the object side surface of the first lens element and the imaging surface of the image capturing lens assembly on the optical axis satisfy 0.5 ≦ ∑ CT/TTL ≦ 0.7.

In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the shooting lens group on the optical axis and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the shooting lens group can meet the condition that TTL/ImgH is less than or equal to 1.60.

In another aspect, the present application further provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The object side surface of the second lens can be a convex surface; the object side surface of the third lens can be a convex surface, and the image side surface can be a concave surface; the object side surface of the sixth lens element can be convex, and the image side surface can be concave; the image side surface of the seventh lens can be a concave surface; the effective focal length f4 of the fourth lens and the effective focal length f6 of the sixth lens can satisfy 0.5 < f4/f6 < 2.

In one embodiment, the second lens may have a positive optical power.

In one embodiment, the fourth lens and the sixth lens may each have a positive optical power.

In another aspect, the present application further provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The second lens can have positive focal power, and the object side surface of the second lens can be a convex surface; the object side surface of the third lens can be a convex surface, and the image side surface can be a concave surface; the object side surface of the sixth lens element can be convex, and the image side surface can be concave; the image side surface of the seventh lens can be a concave surface; the effective focal length f2 of the second lens and the total effective focal length f of the image pickup lens group can satisfy 0.5 < f2/f < 1.5.

In another aspect, the present application further provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The second lens can have positive focal power, and the object side surface of the second lens can be a convex surface; the object side surface of the third lens can be a convex surface, and the image side surface can be a concave surface; the object side surface of the sixth lens element can be convex, and the image side surface can be concave; the image side surface of the seventh lens can be a concave surface; the separation distance T67 on the optical axis of the sixth lens and the seventh lens and the separation distance T56 on the optical axis of the fifth lens and the sixth lens may satisfy 4 < T67/T56 < 14.

In another aspect, the present application further provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The second lens can have positive focal power, and the object side surface of the second lens can be a convex surface; the object side surface of the third lens can be a convex surface, and the image side surface can be a concave surface; the object side surface of the sixth lens element can be convex, and the image side surface can be concave; the seventh lens element may have a negative refractive power, and the image-side surface thereof may be concave; the effective focal length f7 of the seventh lens and the effective focal length f2 of the second lens can satisfy-1.5 < f7/f2 < -0.5.

In another aspect, the present application further provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The second lens can have positive focal power, and the object side surface of the second lens can be a convex surface; the object side surface of the third lens can be a convex surface, and the image side surface can be a concave surface; the object side surface of the sixth lens element can be convex, and the image side surface can be concave; the image side surface of the seventh lens can be a concave surface; the curvature radius R12 of the image side surface of the sixth lens and the curvature radius R11 of the object side surface of the sixth lens can satisfy 1.5 < R12/R11 < 4.0.

In another aspect, the present application further provides an image capturing lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power. The second lens can have positive focal power, and the object side surface of the second lens can be a convex surface; the object side surface of the third lens can be a convex surface, and the image side surface can be a concave surface; the object side surface of the sixth lens element can be convex, and the image side surface can be concave; the image side surface of the seventh lens can be a concave surface; the distance TTL from the object side surface of the first lens to the imaging surface of the shooting lens group on the optical axis and the half of the length ImgH of the diagonal line of the effective pixel area on the imaging surface of the shooting lens group can meet the condition that TTL/ImgH is less than or equal to 1.60.

The imaging lens group has the advantages of large aperture, enhanced relative brightness of an imaging surface and improved imaging effect under the condition of insufficient light by reasonably distributing the focal power, the surface type, the center thickness of each lens, the on-axis distance between each lens and the like of each lens. Meanwhile, the camera lens group with the configuration can also have at least one of the advantages of being ultra-thin, small in size, large in aperture, low in sensitivity, good in processability, high in imaging quality, wide in angle and the like.

Drawings

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

fig. 1 shows a schematic configuration diagram of an image pickup lens group according to embodiment 1 of the present application;

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

fig. 3 shows a schematic configuration diagram of an image pickup lens group according to embodiment 2 of the present application;

fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 2;

fig. 5 shows a schematic configuration diagram of an image pickup lens group according to embodiment 3 of the present application;

fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of embodiment 3;

fig. 7 shows a schematic configuration diagram of an image pickup lens group according to embodiment 4 of the present application;

fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 4;

fig. 9 shows a schematic configuration diagram of an image pickup lens group according to embodiment 5 of the present application;

fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 5;

fig. 11 shows a schematic configuration diagram of an image pickup lens group according to embodiment 6 of the present application;

fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 6;

fig. 13 is a schematic view showing a configuration of an image pickup lens group according to embodiment 7 of the present application;

fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 7;

fig. 15 shows a schematic configuration diagram of an image pickup lens group according to embodiment 8 of the present application;

fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 8;

fig. 17 shows a schematic configuration diagram of an image pickup lens group according to embodiment 9 of the present application;

fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of an imaging lens group of example 9;

fig. 19 shows a schematic configuration diagram of an image pickup lens group according to embodiment 10 of the present application;

fig. 20A to 20D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 10;

fig. 21 is a schematic view showing a configuration of an image pickup lens group according to embodiment 11 of the present application;

fig. 22A to 22D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 11;

fig. 23 is a schematic view showing a configuration of an image pickup lens group according to embodiment 12 of the present application;

fig. 24A to 24D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the imaging lens group of example 12.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

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

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

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface, and the surface of each lens closest to the image plane is called the image side surface.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

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

The features, principles, and other aspects of the present application are described in detail below.

An image pickup lens group according to an exemplary embodiment of the present application includes, for example, seven lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are arranged along the optical axis in sequence from the object side to the image side.

In an exemplary embodiment, an image pickup lens group may include: a first lens having an optical power; a second lens having a positive refractive power, the object-side surface of which is convex; a third lens with focal power, wherein the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens element having a refractive power, the object-side surface of which is convex and the image-side surface of which is concave; and the seventh lens with the focal power has a concave image side surface.

In one embodiment, the first lens may have a negative optical power; the second lens may have a positive optical power; the third lens may have a positive optical power; the fourth lens may have a positive optical power; the fifth lens may have a negative optical power; the sixth lens may have a positive optical power; and the seventh lens may have a negative optical power.

In one embodiment, the first lens may have a negative optical power; the second lens may have a positive optical power; the third lens may have a negative optical power; the fourth lens may have a positive optical power; the fifth lens may have a negative optical power; the sixth lens may have a positive optical power; and the seventh lens may have a negative optical power.

In one embodiment, the first lens may have a positive optical power; the second lens may have a positive optical power; the third lens may have a negative optical power; the fourth lens may have a positive optical power; the fifth lens may have a negative optical power; the sixth lens may have a positive optical power; and the seventh lens may have a negative optical power.

The second lens may have positive power, and an effective focal length f2 thereof and a total effective focal length f of the image pickup lens group may satisfy 0.5 < f2/f < 1.5, and more specifically, f2 and f may further satisfy 0.80 ≦ f2/f ≦ 1.40. By controlling the positive focal power of the second lens within a reasonable range, field curvature, distortion and other field-related aberrations can be effectively controlled, and thus, the imaging quality can be improved.

An effective focal length f4 of the fourth lens and an effective focal length f6 of the sixth lens may satisfy 0.5 < f4/f6 < 2.0, and more specifically, f4 and f6 may further satisfy 0.92 ≦ f4/f6 ≦ 1.89. By reasonably distributing the focal power of the fourth lens and the sixth lens, the aberration of the imaging system can be effectively reduced, and the sensitivity of the imaging system is reduced. In an exemplary embodiment, the second lens and the fourth lens may each have positive optical power.

The effective focal length f7 of the seventh lens and the effective focal length f2 of the second lens can satisfy-1.5 < f7/f2 < -0.5, more specifically, f7 and f2 further satisfy-1.21 < f7/f2 < 0.79. The focal power of the seventh lens and the focal power of the second lens are reasonably distributed, so that the optical performance of the lens can be improved, and better imaging quality can be obtained. In an exemplary embodiment, the second lens may have a positive optical power, and the seventh lens may have a negative optical power.

In application, the curvature radius of each lens surface in the lens group can be optimally designed, and the lens group has better optical performance by reasonably controlling the bending direction and the bending degree of each lens surface.

The total effective focal length f of the image pickup lens group and the radius of curvature R9 of the object-side surface of the fifth lens element may satisfy-3.5 < f/R9 < 0.5, and more specifically, f and R9 may further satisfy-3.11 < f/R9 < 0.01. Through the curvature radius of the object side surface of the reasonably arranged fifth lens, the deflection angle of the light can be controlled within a reasonable range, and then the imaging system can be matched with a common chip easily.

The effective focal length f5 of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens can satisfy-2 < f5/R10 < 22, and more specifically, f5 and R10 can further satisfy-1.54 < f5/R10 < 21.08. The curvature radius of the image side surface of the fifth lens is reasonably arranged, so that the fifth lens can bear a reasonable light ray deflection angle, and the primary aberration of an imaging system is reduced. In an exemplary embodiment, the fifth lens may have a negative power.

The radius of curvature R6 of the image-side surface of the third lens and the radius of curvature R4 of the image-side surface of the second lens can satisfy-0.5 < R6/R4 < 0.8, and more specifically, R6 and R4 can further satisfy-0.11 < R6/R4 < 0.59. By reasonably controlling the bending direction and the bending degree of the image side surface of the second lens and the image side surface of the third lens, the field curvature of the imaging system can be effectively controlled, so that the imaging quality of the imaging system is improved. Alternatively, the image side surface of the third lens may be concave.

The radius of curvature R7 of the object side surface of the fourth lens and the radius of curvature R8 of the image side surface of the fourth lens can satisfy 0 < (R7+ R8)/(R7-R8) ≦ 1.5, and more specifically, R7 and R8 can further satisfy 0.28 ≦ (R7+ R8)/(R7-R8) ≦ 1.50. By reasonably controlling the curvature radius of the object-side surface and the image-side surface of the fourth lens, the astigmatism of the imaging system can be effectively controlled. Alternatively, the fourth lens may be a biconvex lens or the fourth lens may be a meniscus lens convex to the image side.

The radius of curvature R11 of the object-side surface of the sixth lens element and the radius of curvature R12 of the image-side surface of the sixth lens element can satisfy 1.5 < | R11+ R12|/| R11-R12| < 3.5, and more specifically, R11 and R12 can further satisfy 1.79 ≦ | R11+ R12|/| R11-R12| ≦ 3.16. Alternatively, 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 may satisfy 1.5 < R12/R11 < 4.0, and more specifically, R11 and R12 may further satisfy 1.93 ≦ R12/R11 ≦ 3.53. The curvature of field of the imaging system is controlled by controlling the curvature direction and the curvature degree of the object-side surface and the image-side surface of the sixth lens, so that the whole aberration of the imaging system is corrected. Alternatively, the object-side surface of the sixth lens element can be convex and the image-side surface can be concave.

In application, the center thickness of each lens and the spacing distance of each lens can be optimized, so that the lens group has good optical performance.

The central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis can satisfy CT4/CT5 > 1.5, more specifically, CT4 and CT5 can further satisfy 1.64 ≦ CT4/CT5 ≦ 2.52. By reasonably configuring the central thickness CT4 of the fourth lens and the central thickness CT5 of the fifth lens, the miniaturization can be ensured, and meanwhile, the imaging system has better distortion elimination capability, so that the imaging quality of the imaging system is improved.

The total sum sigma CT of the central thicknesses on the optical axis of the lenses with the focal power and the distance TTL between the center of the object side surface of the first lens and the imaging surface of the image pickup lens group on the optical axis can satisfy 0.5- ∑ CT/TTL-0.7, more specifically, sigma CT and TTL can further satisfy 0.55- ∑ CT/TTL-0.60. by properly configuring the central thicknesses of the lenses, better imaging quality of an imaging system can be obtained, and in addition, the reasonable distribution of the central thicknesses of the lenses is also favorable for the stability of lens group assembly.

A separation distance T67 between the sixth lens and the seventh lens on the optical axis and a separation distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy 4 < T67/T56 < 14, and more specifically, T67 and T56 may further satisfy 4.36 ≦ T67/T56 ≦ 13.77. The spacing distance between the lenses is reasonably configured, the longitudinal size of the imaging system can be effectively compressed, and the ultrathin characteristic of the imaging system is realized.

The distance TTL between the center of the object side surface of the first lens and the imaging surface of the shooting lens group on the optical axis and the half of the length ImgH of the diagonal line of the effective pixel area on the imaging surface of the shooting lens group can meet the condition that TTL/ImgH is less than or equal to 1.60, and more specifically, TTL and ImgH can further meet the condition that TTL/ImgH is less than or equal to 1.40 and less than or equal to 1.55. By controlling the total optical length and the high image ratio of the lens, the size of the imaging system can be effectively reduced, so that the ultrathin characteristic and the miniaturization of the shooting lens group are realized, and the shooting lens group can be well suitable for systems with limited sizes, such as portable electronic products and the like.

f/EPD of 1.65 or less can be satisfied between the total effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group, and more specifically, f and EPD can further satisfy 1.54 or less and f/EPD or less and 1.65. The smaller the f-number Fno of the image-taking lens group (i.e., the total effective focal length f of the lens group/the entrance pupil diameter EPD of the lens group), the larger the clear aperture of the lens group, the more the amount of light entering in the same unit time. The reduction of f-number Fno can promote image plane luminance effectively for the shooting demand when light such as cloudy day, dusk is not enough can be satisfied better to the battery of lenses. The lens group is configured to satisfy the conditional expression f/EPD less than or equal to 1.65, so that the lens group has the advantage of a large aperture in the process of increasing the light transmission quantity, the relative illumination of an imaging surface is enhanced, and the imaging effect of the lens group in a dark environment is improved while the peripheral field aberration is reduced.

In an exemplary embodiment, the image capturing lens group may further be provided with at least one stop to improve the imaging quality of the lens. The diaphragm may be disposed, for example, between the first lens and the second lens.

Alternatively, the above-described image pickup lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image formation surface.

The image pickup lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the lens group can be effectively reduced, the sensitivity of the lens group can be reduced, and the machinability of the lens group can be improved, so that the camera lens group is more favorable for production and processing and can be suitable for portable electronic products. Meanwhile, the camera lens group configured as above has beneficial effects such as ultra-thin, large aperture, high brightness, high imaging quality and the like.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated 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 constituting an imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the image pickup lens group is not limited to include seven lenses. The imaging lens group may also include other numbers of lenses, if desired.

Specific examples of an image pickup lens group applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

An image pickup lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an image pickup lens group according to embodiment 1 of the present application.

As shown in fig. 1, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2, and the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric.

The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4, and both the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8, and both the object-side surface S7 and the image-side surface S8 of the fourth lens element E4 are aspheric.

The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10, and both the object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric.

The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12, and both the object-side surface S11 and the image-side surface S12 of the sixth lens element E6 are aspheric.

The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14, and the object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric.

Optionally, the image capturing lens group may further include a filter E8 having an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

Optionally, the image capturing lens group may further include a stop STO disposed between the first lens E1 and the second lens E2 to improve image quality.

Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 1, where the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 1

As can be seen from table 1, R6/R4 is 0.52 between the radius of curvature R6 of the image-side surface S6 of the third lens E3 and the radius of curvature R4 of the image-side surface S4 of the second lens E2; the radius of curvature R7 of the object-side surface S7 of the fourth lens E4 and the radius of curvature R8 of the image-side surface S8 of the fourth lens E4 satisfy (R7+ R8)/(R7-R8) ═ 0.29; the radius of curvature R11 of the object-side surface S11 of the sixth lens E6 and the radius of curvature R12 of the image-side surface S12 of the sixth lens E6 satisfy | R11+ R12|/| R11-R12| ═ 2.11; the radius of curvature R11 of the object-side surface S11 of the sixth lens E6 and the radius of curvature R12 of the image-side surface S12 of the sixth lens E6 also satisfy that R12/R11 is 2.80; the central thickness CT4 of the fourth lens E4 on the optical axis and the central thickness CT5 of the fifth lens E5 on the optical axis satisfy CT4/CT 5-2.33; the sum Σ CT of the center thicknesses on the optical axes of the first lens E1 to the seventh lens E7 and the on-axis distance TTL from the center of the object-side surface S1 of the first lens E1 to the imaging surface S17 of the imaging lens group satisfy 0.55 Σ CT/TTL, respectively; the separation distance T67 of the sixth lens E6 and the seventh lens E7 on the optical axis and the separation distance T56 of the fifth lens E5 and the sixth lens E6 on the optical axis satisfy T67/T56 of 9.29.

In the present embodiment, each lens may be an aspheric lens, and each aspheric surface type x is defined by the following formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S14 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

TABLE 2

Table 3 gives effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image-taking lens group, an optical total length TTL (i.e., a distance on the optical axis from the center of the object side surface S1 of the first lens E1 to the imaging surface S17), and a half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 in embodiment 1.

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-53.06	5.44	144.17	7.54	-5.24
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	4.37	-5.63	3.89	5.10	3.41

TABLE 3

As can be seen from tables 1 and 3, f2/f is 1.40 between the effective focal length f2 of the second lens E2 and the total effective focal length f of the image pickup lens group; f4/f6 of 1.72 is satisfied between the effective focal length f4 of the fourth lens E4 and the effective focal length f6 of the sixth lens E6; f7/f2 is-1.04 between the effective focal length f7 of the seventh lens E7 and the effective focal length f2 of the second lens E2; a distance TTL between the object side surface S1 of the first lens E1 and the imaging surface S17 on the optical axis and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 satisfy TTL/ImgH equal to 1.50; the total effective focal length f of the image pickup lens group and the curvature radius R9 of the object side surface S9 of the fifth lens E5 satisfy f/R9-2.10; f5/R10 of 1.26 is satisfied between the effective focal length f5 of the fifth lens E5 and the image side surface R10 of the fifth lens E5.

In the present embodiment, f/EPD between the total effective focal length f of the imaging lens group and the entrance pupil diameter EPD of the imaging lens group is 1.59, which has a larger aperture.

Fig. 2A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 1, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 1. Fig. 2C shows a distortion curve of the image pickup lens group of embodiment 1, which represents a distortion magnitude value in the case of different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 1, which represents a deviation of different image heights on an image formation plane after light passes through the lens group. As can be seen from fig. 2A to 2D, the image capturing lens assembly according to embodiment 1 can achieve good image quality.

Example 2

An image pickup lens group according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic configuration diagram of an image pickup lens group according to embodiment 2 of the present application.

As shown in fig. 3, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric.

The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4, and both the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8, and both the object-side surface S7 and the image-side surface S8 of the fourth lens element E4 are aspheric.

The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10, and the object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric.

The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14, and both the object-side surface S13 and the image-side surface S14 of the seventh lens element E7 are aspheric.

Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 2, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 5 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 6 shows the effective focal lengths f1 to f7 of the respective lenses, the total effective focal length f of the image pickup lens group, the total optical length TTL, and half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 in example 2.

TABLE 4

TABLE 5

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-9.47	3.10	-148.02	6.42	-8.67
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	6.48	-2.61	3.59	4.79	3.41

TABLE 6

Fig. 4A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 2, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 4B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 2. Fig. 4C shows a distortion curve of the image pickup lens group of embodiment 2, which represents the distortion magnitude values in the case of different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 2, which represents a deviation of different image heights on an image formation plane after light passes through the lens group. As can be seen from fig. 4A to 4D, the imaging lens group according to embodiment 2 can achieve good imaging quality.

Example 3

An image pickup lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic configuration diagram of an image pickup lens group according to embodiment 3 of the present application.

As shown in fig. 5, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 3, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 9 shows the effective focal lengths f1 to f7 of the respective lenses, the total effective focal length f of the image pickup lens group, the total optical length TTL, and half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 in example 3.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.4681E-02

7.2701E-03

-1.0960E-04

-4.2344E-04

-1.7990E-04

1.6868E-04

-2.5746E-05

-2.9500E-06

7.6383E-08

S2

-3.2324E-02

4.1811E-03

2.7279E-04

-1.2308E-03

3.4354E-04

-2.0464E-04

2.4590E-05

8.0621E-08

-3.0697E-07

S3

1.4375E-02

-3.6219E-03

3.4403E-03

-2.1096E-03

2.0694E-03

-9.8514E-04

1.3997E-04

0.0000E+00

S4

-6.4181E-02

6.3809E-02

-4.9156E-02

3.6412E-02

-2.1331E-02

7.8258E-03

-1.2978E-03

0.0000E+00

S5

-3.5294E-02

-1.3805E-01

2.0489E-01

-1.3698E-01

1.2516E-02

4.5679E-02

-2.1612E-02

0.0000E+00

S6

3.1283E-03

-1.5096E-01

1.9515E-01

-1.0961E-01

1.8010E-02

2.0121E-02

-3.2208E-03

0.0000E+00

S7

-1.6281E-02

-5.6098E-02

3.2464E-02

-6.4990E-02

1.0021E-01

-7.5687E-02

2.6878E-02

0.0000E+00

S8

6.7944E-02

-5.7795E-01

9.5352E-01

-8.4334E-01

4.2047E-01

-1.0822E-01

9.7299E-03

0.0000E+00

S9

7.8928E-02

-6.1167E-01

8.2943E-01

-5.0619E-01

1.0100E-01

3.0876E-02

-1.4083E-02

0.0000E+00

S10

-1.4111E-01

-4.0688E-02

1.3825E-01

-9.9123E-02

3.2702E-02

-5.1265E-03

3.1016E-04

0.0000E+00

S11

3.7220E-02

-2.2998E-01

2.2303E-01

-1.9451E-01

1.1478E-01

-3.9344E-02

5.4751E-03

0.0000E+00

S12

1.3886E-01

-2.6107E-01

1.7252E-01

-6.7886E-02

1.6375E-02

-2.2120E-03

1.2598E-04

0.0000E+00

S13

-2.0772E-01

1.2295E-01

-3.0890E-02

4.0246E-03

-2.8140E-04

1.0050E-05

-1.4385E-07

0.0000E+00

S14

-8.3703E-02

4.2855E-02

-1.4409E-02

2.8001E-03

-2.9624E-04

1.5821E-05

-3.3402E-07

0.0000E+00

TABLE 8

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-11.29	3.21	-181.54	5.84	-7.67
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	6.37	-2.54	3.62	4.79	3.41

TABLE 9

Fig. 6A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 3, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 6B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 3. Fig. 6C shows a distortion curve of the image pickup lens group of embodiment 3, which represents the distortion magnitude values in the case of different angles of view. Fig. 6D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 3, which represents a deviation of different image heights on an image formation plane after light passes through the lens group. As can be seen from fig. 6A to 6D, the imaging lens group according to embodiment 3 can achieve good imaging quality.

Example 4

An image pickup lens group according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of an image pickup lens group according to embodiment 4 of the present application.

As shown in fig. 7, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 4, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 11 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. Table 12 shows the effective focal lengths f1 to f7 of the respective lenses, the total effective focal length f of the image pickup lens group, the total optical length TTL, and half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 in example 4.

Watch 10

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.1350E-02

6.9489E-03

4.5318E-04

3.1722E-05

-5.0623E-04

2.2098E-04

-2.5729E-05

-2.9510E-06

7.6503E-08

S2

-3.2350E-02

5.7484E-03

1.9648E-03

-9.6354E-04

2.8612E-04

-2.0477E-04

2.4584E-05

8.0621E-08

-3.0674E-07

S3

1.8053E-02

-1.1439E-02

1.4775E-02

-1.5138E-02

1.0711E-02

-3.7879E-03

4.8399E-04

0.0000E+00

S4

-7.3380E-02

8.5563E-02

-7.9326E-02

6.4999E-02

-4.0129E-02

1.5845E-02

-2.8898E-03

0.0000E+00

S5

-1.8599E-02

-1.7900E-01

2.8487E-01

-2.4802E-01

1.0108E-01

8.9390E-03

-1.5240E-02

0.0000E+00

S6

1.0217E-02

-1.5051E-01

1.9904E-01

-1.2402E-01

2.8805E-02

1.1892E-02

5.7805E-04

0.0000E+00

S7

-2.1925E-02

-4.4848E-02

4.8937E-02

-1.1544E-01

1.5690E-01

-1.2147E-01

4.3464E-02

0.0000E+00

S8

8.0341E-02

-9.1716E-01

1.7374E+00

-1.8058E+00

1.0832E+00

-3.5346E-01

4.7881E-02

0.0000E+00

S9

3.5187E-01

-1.5549E+00

2.7111E+00

-2.6499E+00

1.5131E+00

-4.7025E-01

6.0320E-02

0.0000E+00

S10

-4.7759E-02

-3.7019E-01

7.7787E-01

-7.6934E-01

4.2538E-01

-1.2639E-01

1.5717E-02

0.0000E+00

S11

-3.4428E-02

-9.0083E-02

7.5163E-02

-8.3447E-02

5.5183E-02

-2.0691E-02

3.1460E-03

0.0000E+00

S12

8.7241E-02

-1.7354E-01

1.0292E-01

-3.5814E-02

7.7733E-03

-9.5990E-04

5.0131E-05

0.0000E+00

S13

-1.6010E-01

1.0580E-01

-2.8412E-02

4.0032E-03

-3.0854E-04

1.2385E-05

-2.0308E-07

0.0000E+00

S14

-7.7010E-02

4.2784E-02

-1.5798E-02

3.4301E-03

-4.1887E-04

2.6707E-05

-6.8748E-07

0.0000E+00

TABLE 11

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-11.95	3.24	-229.49	5.76	-6.05
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	5.34	-2.55	3.62	4.79	3.41

TABLE 12

Fig. 8A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 4, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 8B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 4. Fig. 8C shows a distortion curve of the image pickup lens group of embodiment 4, which represents the distortion magnitude values in the case of different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 4, which represents a deviation of different image heights on the imaging surface after light passes through the lens group. As can be seen from fig. 8A to 8D, the imaging lens group according to embodiment 4 can achieve good imaging quality.

Example 5

An image pickup lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration diagram of an image pickup lens group according to embodiment 5 of the present application.

As shown in fig. 9, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 5, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 15 shows effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image pickup lens group, an optical total length TTL, and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 in example 5.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.5039E-02

7.3848E-03

1.1989E-03

-1.4957E-04

-5.7205E-04

2.4292E-04

-2.5721E-05

-2.9510E-06

7.6446E-08

S2

-4.2278E-02

1.1052E-02

1.5062E-04

-3.6017E-04

1.8449E-04

-2.0481E-04

2.4587E-05

8.1593E-08

-3.0668E-07

S3

6.0817E-03

-3.7583E-03

6.1443E-04

-4.9018E-05

2.3448E-06

-6.5813E-08

7.9564E-10

0.0000E+00

S4

-7.2604E-02

8.5614E-02

-8.3174E-02

7.0035E-02

-4.3265E-02

1.6698E-02

-2.8824E-03

0.0000E+00

S5

-7.3362E-03

-2.1997E-01

3.8345E-01

-3.9987E-01

2.4939E-01

-7.1446E-02

3.1117E-03

0.0000E+00

S6

5.8587E-03

-1.4169E-01

1.8714E-01

-1.0707E-01

1.2189E-02

2.3567E-02

-3.5389E-03

0.0000E+00

S7

-2.0106E-02

-4.2062E-02

3.6255E-02

-8.1720E-02

1.1137E-01

-8.6837E-02

3.2573E-02

0.0000E+00

S8

-1.2176E-02

-6.7763E-01

1.3228E+00

-1.3585E+00

7.9421E-01

-2.5072E-01

3.2498E-02

0.0000E+00

S9

3.0378E-01

-1.3513E+00

2.2936E+00

-2.1675E+00

1.1951E+00

-3.5879E-01

4.4304E-02

0.0000E+00

S10

-4.2109E-02

-3.6670E-01

7.3764E-01

-7.0972E-01

3.8460E-01

-1.1301E-01

1.4024E-02

0.0000E+00

S11

-3.4658E-02

-9.6988E-02

9.0356E-02

-9.8244E-02

6.2947E-02

-2.2794E-02

3.3649E-03

0.0000E+00

S12

6.3694E-02

-1.5132E-01

8.7112E-02

-2.8851E-02

5.9284E-03

-6.9674E-04

3.4740E-05

0.0000E+00

S13

-1.7880E-01

1.1877E-01

-3.3372E-02

4.9639E-03

-4.0264E-04

1.6919E-05

-2.8861E-07

0.0000E+00

S14

-8.1470E-02

4.6220E-02

-1.7192E-02

3.7626E-03

-4.6530E-04

3.0169E-05

-7.9193E-07

0.0000E+00

TABLE 14

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-11.74	3.18	-115.89	5.88	-6.62
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	5.82	-2.58	3.63	4.79	3.41

Watch 15

Fig. 10A shows an on-axis chromatic aberration curve of the imaging lens group of example 5, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 10B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 5. Fig. 10C shows a distortion curve of the image pickup lens group of example 5, which represents the distortion magnitude values in the case of different angles of view. Fig. 10D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 5, which represents a deviation of different image heights on an image formation surface after light passes through the lens group. As can be seen from fig. 10A to 10D, the imaging lens group according to embodiment 5 can achieve good imaging quality.

Example 6

An image pickup lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic configuration diagram of an image pickup lens group according to embodiment 6 of the present application.

As shown in fig. 11, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

The fifth lens element E5 has negative power, and has a concave object-side surface S9, a concave image-side surface S10, and aspheric object-side surface S9 and image-side surface S10 of the fifth lens element E5.

Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 6, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 17 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 18 shows effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image pickup lens group, an optical total length TTL, and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 in example 6.

TABLE 16

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.7182E-02

1.0322E-02

-8.3968E-04

-8.3890E-04

2.2425E-05

1.3684E-04

-2.5726E-05

-2.9511E-06

7.6655E-08

S2

3.4309E-03

4.8567E-03

4.1057E-04

-7.4422E-04

3.0322E-04

-2.0480E-04

2.4592E-05

7.9947E-08

-3.0692E-07

S3

7.9444E-03

1.2327E-02

-1.2075E-02

6.6302E-03

-1.8892E-04

-1.0576E-03

2.9745E-04

0.0000E+00

S4

-6.7531E-02

7.6452E-02

-7.8034E-02

6.8180E-02

-4.1100E-02

1.4897E-02

-2.4063E-03

0.0000E+00

S5

7.9289E-04

-1.6572E-01

2.4594E-01

-2.1257E-01

9.5492E-02

4.1027E-04

-1.2141E-02

0.0000E+00

S6

4.2463E-02

-1.8419E-01

2.5232E-01

-1.9995E-01

9.7543E-02

-1.6178E-02

2.6890E-03

0.0000E+00

S7

-2.8270E-02

-5.1666E-02

7.5578E-02

-1.7486E-01

2.2469E-01

-1.5755E-01

5.1341E-02

0.0000E+00

S8

4.8395E-02

-6.2857E-01

1.1971E+00

-1.2510E+00

7.6606E-01

-2.5812E-01

3.6513E-02

0.0000E+00

S9

1.5402E-01

-9.4111E-01

1.5325E+00

-1.3308E+00

6.5270E-01

-1.6392E-01

1.3665E-02

0.0000E+00

S10

-3.6281E-02

-3.8396E-01

7.1381E-01

-6.4407E-01

3.3137E-01

-9.3037E-02

1.0924E-02

0.0000E+00

S11

-2.7283E-02

-1.0317E-01

8.5264E-02

-7.6946E-02

4.3431E-02

-1.4729E-02

2.2354E-03

0.0000E+00

S12

1.3520E-01

-1.7738E-01

8.6640E-02

-2.4183E-02

4.1872E-03

-4.1912E-04

1.8020E-05

0.0000E+00

S13

-2.5995E-01

1.8278E-01

-5.8090E-02

1.0395E-02

-1.0704E-03

5.8439E-05

-1.2862E-06

0.0000E+00

S14

-9.7142E-02

5.9956E-02

-2.2364E-02

4.7972E-03

-5.7636E-04

3.6092E-05

-9.1279E-07

0.0000E+00

TABLE 17

Watch 18

Fig. 12A shows an on-axis chromatic aberration curve of the imaging lens group of example 6, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 12B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 6. Fig. 12C shows a distortion curve of the image pickup lens group of example 6, which represents the distortion magnitude values in the case of different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 6, which represents a deviation of different image heights on an image formation surface after light passes through the lens group. As can be seen from fig. 12A to 12D, the imaging lens group according to embodiment 6 can achieve good imaging quality.

Example 7

An image pickup lens group according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic configuration diagram of an image pickup lens group according to embodiment 7 of the present application.

As shown in fig. 13, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 7, where the unit of the radius of curvature and the thickness are both millimeters (mm). Table 20 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 21 shows effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image pickup lens group, an optical total length TTL, and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 in example 7.

Watch 19

Watch 20

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-9.69	2.94	-66.78	6.93	-9.25
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	5.82	-2.49	3.68	4.79	3.41

TABLE 21

Fig. 14A shows on-axis chromatic aberration curves of the imaging lens group of example 7, which indicate the deviation of convergent focuses of light rays of different wavelengths after passing through the lens group. Fig. 14B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 7. Fig. 14C shows a distortion curve of the image pickup lens group of example 7, which represents the distortion magnitude values in the case of different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the imaging lens group of example 7, which represents a deviation of different image heights on an image formation surface after light passes through the lens group. As can be seen from fig. 14A to 14D, the imaging lens group according to embodiment 7 can achieve good imaging quality.

Example 8

An image pickup lens group according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic configuration diagram of an image pickup lens group according to embodiment 8 of the present application.

As shown in fig. 15, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 8, where the unit of radius of curvature and thickness is millimeters (mm). Table 23 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 8, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. Table 24 shows effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image pickup lens group, an optical total length TTL, and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 in example 8.

TABLE 22

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.2075E-02

1.1887E-02

-7.5370E-04

-9.2715E-04

-4.5944E-05

1.6676E-04

-2.6844E-05

-2.9520E-06

7.6672E-08

S2

-4.4449E-03

7.0168E-03

1.0881E-03

-1.6549E-03

5.0258E-04

-2.0483E-04

2.4593E-05

8.0104E-08

-3.0692E-07

S3

8.7969E-03

1.2603E-02

-1.3985E-02

1.2437E-02

-6.6425E-03

2.4902E-03

-4.6513E-04

0.0000E+00

S4

-7.5241E-02

1.0103E-01

-1.1023E-01

9.7711E-02

-5.8672E-02

2.1198E-02

-3.4876E-03

0.0000E+00

S5

-5.1719E-03

-1.3316E-01

2.0654E-01

-1.8325E-01

8.5805E-02

-2.9896E-03

-1.0026E-02

0.0000E+00

S6

2.4311E-02

-1.2724E-01

1.7346E-01

-1.1609E-01

3.4007E-02

1.2212E-02

-3.0230E-03

0.0000E+00

S7

-2.2267E-02

-7.7193E-02

1.4276E-01

-2.9830E-01

3.6208E-01

-2.4260E-01

7.4691E-02

0.0000E+00

S8

9.7890E-02

-7.3982E-01

1.3238E+00

-1.3378E+00

8.0304E-01

-2.6761E-01

3.7634E-02

0.0000E+00

S9

1.4858E-01

-8.7666E-01

1.4341E+00

-1.2381E+00

6.1209E-01

-1.5897E-01

1.4741E-02

0.0000E+00

S10

-1.0525E-01

-2.1709E-01

4.9862E-01

-4.7279E-01

2.5112E-01

-7.2858E-02

8.8010E-03

0.0000E+00

S11

-8.1629E-03

-1.3010E-01

1.1665E-01

-1.0541E-01

6.0305E-02

-1.9935E-02

2.8436E-03

0.0000E+00

S12

1.5008E-01

-2.0645E-01

1.0782E-01

-3.2978E-02

6.2210E-03

-6.6064E-04

2.9425E-05

0.0000E+00

S13

-2.0996E-01

1.4372E-01

-4.2394E-02

6.8024E-03

-5.9475E-04

2.4635E-05

-2.9974E-07

0.0000E+00

S14

-9.2871E-02

5.4360E-02

-2.0018E-02

4.2808E-03

-5.1171E-04

3.1768E-05

-7.9339E-07

0.0000E+00

TABLE 23

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-9.60	3.13	1291.19	6.05	-6.47
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	5.15	-2.51	3.56	4.79	3.41

Watch 24

Fig. 16A shows an on-axis chromatic aberration curve of an imaging lens group of example 8, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 16B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 8. Fig. 16C shows a distortion curve of the image pickup lens group of example 8, which represents the distortion magnitude values in the case of different angles of view. Fig. 16D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 8, which represents a deviation of different image heights on an image formation surface after light passes through the lens group. As can be seen from fig. 16A to 16D, the imaging lens group according to embodiment 8 can achieve good imaging quality.

Example 9

An image pickup lens group according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 shows a schematic configuration diagram of an image pickup lens group according to embodiment 9 of the present application.

As shown in fig. 17, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 9, where the unit of radius of curvature and thickness are both millimeters (mm). Table 26 shows high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 27 shows effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image pickup lens group, an optical total length TTL, and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 in example 9.

TABLE 25

Watch 26

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-58.02	4.88	-32.98	8.01	-5.45
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	4.24	-5.90	3.92	5.30	3.41

Watch 27

Fig. 18A shows an on-axis chromatic aberration curve of an imaging lens group of example 9, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 18B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of example 9. Fig. 18C shows a distortion curve of the image pickup lens group of example 9, which represents the distortion magnitude values in the case of different angles of view. Fig. 18D shows a chromatic aberration of magnification curve of the imaging lens group of example 9, which represents a deviation of different image heights on an image formation surface after light passes through the lens group. As can be seen from fig. 18A to 18D, the imaging lens group according to embodiment 9 can achieve good imaging quality.

Example 10

An image pickup lens group according to embodiment 10 of the present application is described below with reference to fig. 19 to 20D. Fig. 19 shows a schematic configuration diagram of an image pickup lens group according to embodiment 10 of the present application.

As shown in fig. 19, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

Table 28 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 10, where the unit of radius of curvature and thickness is millimeters (mm). Table 29 shows high-order term coefficients that can be used for each aspherical mirror surface in example 10, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 30 shows effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image pickup lens group, an optical total length TTL, and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 in example 10.

Watch 28

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.6392E-03

5.1950E-03

4.7325E-04

-6.4256E-04

-2.4419E-04

1.0832E-04

-2.5728E-05

-2.9503E-06

7.6610E-08

S2

9.6232E-03

5.2081E-03

2.0816E-03

3.4628E-04

-6.5692E-04

-2.0480E-04

2.4589E-05

8.0134E-08

-3.0700E-07

S3

2.4549E-02

2.3889E-02

-7.2442E-02

1.1397E-01

-1.0088E-01

4.6033E-02

-8.6866E-03

0.0000E+00

S4

-8.8411E-02

2.5235E-02

2.4680E-02

-5.9640E-02

4.9409E-02

-1.7482E-02

1.7391E-03

0.0000E+00

S5

9.4505E-03

-1.8066E-01

2.9330E-01

-1.7284E-01

-2.2519E-02

8.3945E-02

-3.0374E-02

0.0000E+00

S6

-9.6145E-03

-6.2935E-03

-4.6611E-03

1.7531E-01

-2.8955E-01

1.9864E-01

-4.6669E-02

0.0000E+00

S7

-4.6536E-02

2.9916E-02

-1.5089E-01

2.1143E-01

-1.4341E-01

-5.1781E-04

2.6741E-02

0.0000E+00

S8

-6.2656E-02

4.5185E-02

-1.6949E-01

2.1339E-01

-1.7668E-01

8.7850E-02

-1.8544E-02

0.0000E+00

S9

-8.6219E-02

7.4854E-02

-2.2713E-01

2.5267E-01

-8.5941E-02

-1.0534E-04

2.1265E-03

0.0000E+00

S10

-2.3098E-01

2.1440E-01

-1.9434E-01

1.1898E-01

-4.2139E-03

-2.1037E-02

5.1883E-03

0.0000E+00

S11

-9.4741E-02

9.1845E-02

-1.5391E-01

1.2456E-01

-5.6962E-02

1.3468E-02

-1.2421E-03

0.0000E+00

S12

1.7378E-01

-2.1136E-01

1.1777E-01

-4.0945E-02

8.6030E-03

-9.6678E-04

4.3910E-05

0.0000E+00

S13

-3.6835E-01

1.6901E-01

-4.6267E-02

9.3161E-03

-1.3262E-03

1.1277E-04

-4.1482E-06

0.0000E+00

S14

-1.8750E-01

9.7385E-02

-3.7184E-02

9.2920E-03

-1.3756E-03

1.0818E-04

-3.4371E-06

0.0000E+00

Watch 29

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	-54.76	4.97	-41.27	7.65	-5.25
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	4.27	-5.91	3.92	5.28	3.41

Watch 30

Fig. 20A shows an on-axis chromatic aberration curve of the imaging lens group of example 10, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens group. Fig. 20B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of example 10. Fig. 20C shows a distortion curve of the image pickup lens group of example 10, which represents the distortion magnitude values in the case of different angles of view. Fig. 20D shows a chromatic aberration of magnification curve of the imaging lens group of example 10, which represents a deviation of different image heights on an image formation surface after light passes through the lens group. As can be seen from fig. 20A to 20D, the imaging lens group according to embodiment 10 can achieve good imaging quality.

Example 11

An image pickup lens group according to embodiment 11 of the present application is described below with reference to fig. 21 to 22D. Fig. 21 shows a schematic configuration diagram of an image pickup lens group according to embodiment 11 of the present application.

As shown in fig. 21, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

The first lens element E1 has positive power, the object-side surface S1 is convex, the image-side surface S2 is concave, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric.

Table 31 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 11, where the unit of radius of curvature and thickness are both millimeters (mm). Table 32 shows high-order term coefficients that can be used for each aspherical mirror surface in example 11, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 33 shows effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image pickup lens group, an optical total length TTL, and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 in example 11.

Watch 31

Watch 32

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	709.06	3.86	-11.15	8.10	-21.01
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	7.44	-4.40	3.85	5.13	3.34

Watch 33

Fig. 22A shows on-axis chromatic aberration curves of an imaging lens group of example 11, which represent convergent focus deviations of light rays of different wavelengths after passing through the lens group. Fig. 22B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens group of example 11. Fig. 22C shows a distortion curve of the image pickup lens group of example 11, which represents the distortion magnitude values in the case of different angles of view. Fig. 22D shows a chromatic aberration of magnification curve of the imaging lens group of example 11, which represents a deviation of different image heights on an image formation surface after light passes through the lens group. As can be seen from fig. 22A to 22D, the imaging lens group according to embodiment 11 can achieve good imaging quality.

Example 12

An image pickup lens group according to embodiment 12 of the present application is described below with reference to fig. 23 to 24D. Fig. 23 shows a schematic configuration diagram of an image pickup lens group according to embodiment 12 of the present application.

As shown in fig. 23, the image pickup lens group includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an image plane S17.

Table 34 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens group of example 12, where the unit of radius of curvature and thickness are both millimeters (mm). Table 35 shows the high-order term coefficients that can be used for each aspherical mirror surface in example 12, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 36 shows effective focal lengths f1 to f7 of the respective lenses, a total effective focal length f of the image pickup lens group, an optical total length TTL, and a half ImgH of a diagonal length of the effective pixel area on the imaging surface S17 in example 12.

Watch 34

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.9592E-02

6.2773E-02

-2.2113E-01

4.4693E-01

-5.3082E-01

3.8953E-01

-1.7417E-01

4.3418E-02

-4.6108E-03

S2

-1.7744E-02

9.2119E-04

-7.7150E-02

3.2820E-01

-5.7678E-01

5.8333E-01

-3.5226E-01

1.1685E-01

-1.6173E-02

S3

4.9660E-02

7.5843E-02

-3.1599E-01

6.4292E-01

-6.8663E-01

3.7516E-01

-8.8289E-02

0.0000E+00

S4

-1.6608E-01

2.9835E-01

-3.6178E-01

3.0693E-01

-1.9112E-01

5.3281E-02

0.0000E+00

S5

-1.2368E-01

1.4887E-01

6.2024E-02

-1.7567E-01

8.3709E-02

0.0000E+00

S6

3.7495E-02

-9.4062E-04

1.7725E-01

-2.5762E-01

1.4809E-01

0.0000E+00

S7

-1.5576E-01

1.1777E+00

-8.9196E+00

3.8276E+01

-1.0154E+02

1.6793E+02

-1.6842E+02

9.3604E+01

-2.2056E+01

S8

-6.8751E-02

-2.3699E-01

1.4716E+00

-5.3923E+00

1.1328E+01

-1.4461E+01

1.1132E+01

-4.7504E+00

8.6540E-01

S9

6.9254E-02

-2.9567E-01

6.1834E-01

-1.2087E+00

1.8191E+00

-1.7653E+00

1.0645E+00

-3.6986E-01

5.5977E-02

S10

-3.7390E-01

8.3669E-01

-1.5812E+00

2.1070E+00

-1.8515E+00

1.0933E+00

-4.2219E-01

9.5287E-02

-9.3901E-03

S11

-4.2604E-02

-1.1600E-01

2.5030E-01

-3.4099E-01

2.8877E-01

-1.5284E-01

4.8125E-02

-8.1116E-03

5.5944E-04

S12

1.9437E-02

-4.4310E-02

1.5459E-03

1.6830E-02

-1.1931E-02

3.8657E-03

-6.3143E-04

4.7531E-05

-1.1123E-06

S13

-2.2986E-01

8.1815E-02

7.4744E-04

-8.7918E-03

3.0353E-03

-5.2695E-04

5.1591E-05

-2.6853E-06

5.6904E-08

S14

-1.2587E-01

5.5079E-02

-1.6207E-02

3.1681E-03

-4.0846E-04

3.5890E-05

-3.1434E-06

3.0364E-07

-1.4249E-08

Watch 35

Parameter(s)	f1(mm)	f2(mm)	f3(mm)	f4(mm)	f5(mm)
						Numerical value	368.78	4.35	-17.49	7.39	-28.92
Parameter(s)	f6(mm)	f7(mm)	f(mm)	TTL(mm)	ImgH(mm)
						Numerical value	7.31	-4.62	3.56	4.95	3.29

Watch 36

Fig. 24A shows on-axis chromatic aberration curves of the imaging lens group of example 12, which indicate the convergent focus deviations of light rays of different wavelengths after passing through the lens group. Fig. 24B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of example 12. Fig. 24C shows a distortion curve of the image pickup lens group of example 12, which represents the distortion magnitude values in the case of different angles of view. Fig. 24D shows a chromatic aberration of magnification curve of the imaging lens group of example 12, which represents a deviation of different image heights on an image formation surface after light passes through the lens group. As can be seen from fig. 24A to 24D, the imaging lens group according to embodiment 12 can achieve good imaging quality.

In summary, examples 1 to 12 each satisfy the relationship shown in table 37.

Watch 37

The present application also provides an image pickup apparatus, wherein the electronic photosensitive element may be a photosensitive coupling element (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The camera device may be a stand-alone camera device such as a digital camera, or may be a camera module integrated on a mobile electronic device such as a mobile phone. The image pickup apparatus is equipped with the image pickup lens group described above.

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

Claims

1. The image capturing lens assembly sequentially comprises, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power,

the second lens has positive focal power, and the object side surface of the second lens is a convex surface;

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

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

the image side surface of the seventh lens is a concave surface;

the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis satisfy CT4/CT5 > 1.5;

the total effective focal length f of the shooting lens group and the entrance pupil diameter EPD of the shooting lens group meet the condition that f/EPD is less than or equal to 1.65;

the effective focal length f2 of the second lens and the total effective focal length f of the image pickup lens group satisfy 0.5 < f2/f ≤ 1.0.

2. The imaging lens group according to claim 1, wherein an effective focal length f4 of the fourth lens and an effective focal length f6 of the sixth lens satisfy 0.5 < f4/f6 < 2.

3. The imaging lens group according to claim 1, wherein the seventh lens has a negative power, and an effective focal length f7 thereof and an effective focal length f2 of the second lens satisfy-1.5 < f7/f2 < -0.5.

4. The imaging lens group of claim 1, wherein a radius of curvature R6 of the image-side surface of the third lens and a radius of curvature R4 of the image-side surface of the second lens satisfy-0.5 < R6/R4 < 0.8.

5. The imaging lens group of claim 1, wherein a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy 0 < (R7+ R8)/(R7-R8) ≦ 1.5.

6. The imaging lens group of claim 1, wherein the total effective focal length f of the imaging lens group and the radius of curvature of the object-side surface of the fifth lens, R9, satisfy-3.5 < f/R9 < 0.5.

7. The imaging lens group of claim 1, wherein an effective focal length f5 of the fifth lens and a radius of curvature R10 of an image-side surface of the fifth lens satisfy-2 < f5/R10 < 22.

8. The imaging lens group of claim 1, wherein a radius of curvature R11 of the object-side surface of the sixth lens and a radius of curvature R12 of the image-side surface of the sixth lens satisfy 1.5 < | R11+ R12|/| R11-R12| < 3.5.

9. The imaging lens group of claim 1, wherein a radius of curvature R12 of the image-side surface of the sixth lens and a radius of curvature R11 of the object-side surface of the sixth lens satisfy 1.5 < R12/R11 < 4.0.

10. The imaging lens group according to claim 1, wherein a separation distance T67 on the optical axis between the sixth lens and the seventh lens and a separation distance T56 on the optical axis between the fifth lens and the sixth lens satisfy 4 < T67/T56 < 14.

11. An imaging lens group according to any one of claims 1 to 10, wherein a central thickness ∑ CT of said first lens element to said seventh lens element on said optical axis and a distance TTL between an object side surface of said first lens element and an imaging surface of said imaging lens group on said optical axis satisfy 0.5 ≤ ∑ CT/TTL ≤ 0.7, respectively.

12. An imaging lens group according to any one of claims 1 to 10, wherein a distance TTL from an object side surface of the first lens element to an imaging surface of the imaging lens group on the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the imaging lens group satisfy TTL/ImgH ≦ 1.60.

13. The image capturing lens assembly sequentially comprises, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power,

the image side surface of the seventh lens is a concave surface;

the effective focal length f2 of the second lens and the total effective focal length f of the image pickup lens group satisfy 0.5 < f2/f and are less than or equal to 1.0; and

an effective focal length f4 of the fourth lens and an effective focal length f6 of the sixth lens satisfy 0.5 < f4/f6 < 2;

the total effective focal length f of the shooting lens group and the entrance pupil diameter EPD of the shooting lens group meet the condition that f/EPD is less than or equal to 1.65.

14. The imaging lens group according to claim 13, wherein the fourth lens and the sixth lens each have positive optical power.

15. The imaging lens group according to claim 13, wherein the seventh lens has a negative power, and an effective focal length f7 thereof and an effective focal length f2 of the second lens satisfy-1.5 < f7/f2 < -0.5.

16. The imaging lens group of claim 13, wherein a radius of curvature R6 of the image-side surface of the third lens and a radius of curvature R4 of the image-side surface of the second lens satisfy-0.5 < R6/R4 < 0.8.

17. The imaging lens group of claim 14, wherein a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy 0 < (R7+ R8)/(R7-R8) ≦ 1.5.

18. The imaging lens group of claim 14, wherein a radius of curvature R11 of the object-side surface of the sixth lens and a radius of curvature R12 of the image-side surface of the sixth lens satisfy 1.5 < | R11+ R12|/| R11-R12| < 3.5.

19. The imaging lens group of claim 14, wherein a radius of curvature R12 of the image-side surface of the sixth lens and a radius of curvature R11 of the object-side surface of the sixth lens satisfy 1.5 < R12/R11 < 4.0.

20. The imaging lens group of claim 13, wherein the total effective focal length f of the imaging lens group and the radius of curvature of the object-side surface of the fifth lens, R9, satisfy-3.5 < f/R9 < 0.5.

21. The imaging lens group of claim 13, wherein an effective focal length f5 of the fifth lens and a radius of curvature R10 of the image side surface of the fifth lens satisfy-2 < f5/R10 < 22.

22. An imaging lens group according to any one of claims 13 to 21, wherein a distance TTL from an object side surface of the first lens element to an imaging surface of the imaging lens group on the optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the imaging lens group satisfy TTL/ImgH ≦ 1.60.

23. The image capturing lens assembly of claim 22, wherein a central thickness ∑ CT of the first through seventh lenses along the optical axis and a distance TTL between an object side surface of the first lens and an image plane of the image capturing lens assembly along the optical axis satisfy 0.5 ≤ ∑ CT/TTL ≤ 0.7.

24. The imaging lens assembly of claim 23, wherein a central thickness CT4 of the fourth lens element on the optical axis and a central thickness CT5 of the fifth lens element on the optical axis satisfy CT4/CT5 > 1.5.

25. The imaging lens group according to claim 23, wherein a separation distance T67 on the optical axis between the sixth lens and the seventh lens and a separation distance T56 on the optical axis between the fifth lens and the sixth lens satisfy 4 < T67/T56 < 14.