CN210924082U - Image pickup lens group - Google Patents

Image pickup lens group Download PDF

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CN210924082U
CN210924082U CN201921572271.9U CN201921572271U CN210924082U CN 210924082 U CN210924082 U CN 210924082U CN 201921572271 U CN201921572271 U CN 201921572271U CN 210924082 U CN210924082 U CN 210924082U
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lens
image
lens group
imaging
satisfy
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周楹
陈念
徐标
张凯元
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Abstract

The application discloses a camera lens group, it includes along the optical axis from the object side to the image side in proper order: 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 optical power; a sixth lens having a refractive power, an image-side surface of which is concave; a seventh lens having a refractive power, an image-side surface of which is convex; an eighth lens having optical power. Wherein, half of diagonal length ImgH of effective pixel area on imaging surface of the camera lens group and F number Fno of the camera lens group satisfy: ImgH/Fno > 3.5 mm.

Description

Image pickup lens group
Technical Field
The present application relates to the field of optical elements, and in particular, to an imaging lens group.
Background
At present, portable electronic products such as smart phones are very popular, and the requirements of consumers on the mobile phone photographing function are higher and higher. With the improvement of the performance and the reduction of the size of a charge-coupled device (CCD) and a complementary metal-oxide semiconductor (CMOS) image sensor, the corresponding imaging lens also meets the requirements of high pixel and miniaturization.
Due to the limitation of the volume of the lens carried on a portable electronic product such as a smart phone, the camera shooting function of the lens often has some defects, such as F2.0 aperture. However, an excessively small aperture often results in poor photographing effect in dark environments such as at night, and thus a large aperture is a goal pursued by many mobile phone manufacturers. The size of the image plane often determines the size of the pixel, with a large image plane meaning a higher image pixel. Therefore, a large image plane and a large aperture also become the development direction of the lens of the portable electronic product such as the smart phone.
SUMMERY OF THE UTILITY MODEL
An aspect of the present application provides an image capturing lens assembly, comprising, in order from an object side to an image side along an optical axis: 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 optical power; a sixth lens having optical power; a seventh lens having a refractive power, an image-side surface of which is convex; an eighth lens having optical power.
In one embodiment, the image side surface of the sixth lens may be concave.
In one embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging surface of the image pickup lens group, and F-number Fno of the image pickup lens group may satisfy: ImgH/Fno > 3.5 mm.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens may satisfy: f1/f7 is more than 0.7 and less than or equal to 1.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 2.5 < | (R1+ R4)/(R1-R4) | < 4.5.
In one embodiment, the effective half aperture DT32 of the image-side surface of the third lens and the effective half aperture DT41 of the object-side surface of the fourth lens satisfy: 0.8 < DT32/DT41 < 1.
In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens may satisfy: (R11-R12)/(R11+ R12) < 0.2.
In one embodiment, the radius of curvature R14 of the image-side surface of the seventh lens element and the radius of curvature R15 of the object-side surface of the eighth lens element may satisfy: 0.8 < R14/R15 < 2.
In one embodiment, the radius of curvature R16 of the image-side surface of the eighth lens and the effective focal length f8 of the eighth lens satisfy: -1.3 < R16/f8 < -0.8.
In one embodiment, a distance Tr7r10 between the object-side surface of the fourth lens and the image-side surface of the fifth lens on the optical axis and a distance Tr11r14 between the object-side surface of the sixth lens and the image-side surface of the seventh lens on the optical axis may satisfy: 0.3 < Tr7r10/Tr11r14 < 0.8.
In one embodiment, the edge thickness ET6 of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis may satisfy: 0.8 < ET6/CT6 < 1.1.
In one embodiment, the effective half aperture DT32 of the image-side surface of the third lens and the effective half aperture DT82 of the image-side surface of the eighth lens satisfy: DT32/DT82 < 0.4.
In one embodiment, a distance SAG61 from an intersection point of an 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 on the optical axis and a distance SAG71 from an intersection point of an object side surface of the seventh lens and the optical axis to an effective radius vertex of the object side surface of the seventh lens on the optical axis may satisfy: 0.6 < SAG61/SAG71 < 0.9.
In one embodiment, a combined focal length f678 of the sixth lens, the seventh lens, and the eighth lens and a total effective focal length f of the image capture lens group may satisfy: -4 < f678/f < -2.
In one embodiment, the effective half aperture DT62 of the image-side surface of the sixth lens and the effective half aperture DT71 of the object-side surface of the seventh lens satisfy: 0.8 < DT62/DT71 < 1.
In one embodiment, the distance Tr11r14 between the object-side surface of the sixth lens and the image-side surface of the seventh lens on the optical axis and the central thickness CT8 of the eighth lens on the optical axis satisfy: 2 < Tr11r14/CT8 < 3.
In one embodiment, the effective half aperture DT82 of the image side surface of the eighth lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the imaging lens group may satisfy: 0.8 < DT82/ImgH < 1.
In one embodiment, a separation distance TTL on an optical axis from an object side surface of the first lens to an imaging surface of the image pickup lens group and a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the image pickup lens group may satisfy: TTL/ImgH is less than 1.4.
In one embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging surface of the image pickup lens group, and the total effective focal length f of the image pickup lens group may satisfy: 5mm < ImgH2/f < 6 mm.
This application adopts eight lens, through the focal power of rational distribution each lens, face type, each lens's central thickness and each lens between the epaxial interval etc for above-mentioned camera lens group has at least one beneficial effect such as big image plane, shorter optical total length, high image quality.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
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 chromatic aberration of magnification curve, respectively, of the imaging lens group of example 9.
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 of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
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 may include eight lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, respectively. The eight lenses are arranged in order from the object side to the image side along the optical axis. Any adjacent two lenses of the first lens to the eighth lens may have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have a positive optical power; the second lens has positive focal power or negative focal power; the third lens has positive focal power or negative focal power; the fourth lens has positive focal power or negative focal power; the fifth lens has positive focal power or negative focal power; the sixth lens has positive focal power or negative focal power; the seventh lens has positive focal power or negative focal power, and the image side surface of the seventh lens can be a convex surface; the eighth lens has positive power or negative power.
In an exemplary embodiment, an image side surface of the sixth lens may be concave.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: ImgH/Fno > 3.5mm, wherein ImgH is half of diagonal length of effective pixel area on imaging surface of the camera lens group, and Fno is F number of the camera lens group. The ratio of the effective image height of the lens to the aperture is controlled, so that the performance of the camera lens group is guaranteed, and the camera lens group has the characteristics of high pixels and large aperture.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.7 < f1/f7 ≦ 1, where f1 is the effective focal length of the first lens and f7 is the effective focal length of the seventh lens. More specifically, f1 and f7 may further satisfy: f1/f7 is more than 0.8 and less than or equal to 1. Satisfying 0.7 < f1/f7 ≦ 1, the spherical aberration contribution amount of the seventh lens can be controlled within a reasonable range, so that the field of view on the optical axis can obtain good imaging quality.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 2.5 < | (R1+ R4)/(R1-R4) | < 4.5, wherein R1 is the radius of curvature of the object-side surface of the first lens and R4 is the radius of curvature of the image-side surface of the second lens. Satisfying 2.5 < | (R1+ R4)/(R1-R4) | < 4.5, the contribution of the astigmatism amount of the object-side surface of the first lens and the image-side surface of the second lens can be effectively controlled, and thus the imaging quality of the intermediate field and the aperture band can be effectively controlled.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.8 < DT32/DT41 < 1, wherein DT32 is the effective half aperture of the image side surface of the third lens and DT41 is the effective half aperture of the object side surface of the fourth lens. More specifically, DT32 and DT41 further satisfy: 0.9 < DT32/DT41 < 1. The requirement of 0.8 < DT32/DT41 < 1 is satisfied, which is beneficial for the third lens and the fourth lens to meet the requirement of processability.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: (R11-R12)/(R11+ R12) < 0.2, where R11 is a radius of curvature of an object-side surface of the sixth lens and R12 is a radius of curvature of an image-side surface of the sixth lens. More specifically, R11 and R12 may further satisfy 0 < (R11-R12)/(R11+ R12) < 0.15. Satisfying (R11-R12)/(R11+ R12) < 0.2, the contribution of the astigmatism amount of the object side and the image side of the sixth lens can be effectively controlled, and the imaging quality of the intermediate field and the aperture band can be effectively controlled.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.8 < R14/R15 < 2, wherein R14 is the radius of curvature of the image-side surface of the seventh lens, and R15 is the radius of curvature of the object-side surface of the eighth lens. The condition that R14/R15 is more than 0.8 and less than 2 is met, the incident angle of the light ray on the seventh lens can be effectively controlled, and further, the sensitivity of the camera lens group can be reduced to a certain degree, and the incident angle of the chief ray can also be reduced.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: -1.3 < R16/f8 < -0.8, wherein R16 is the radius of curvature of the image-side surface of the eighth lens and f8 is the effective focal length of the eighth lens. Satisfy-1.3 < R16/f8 < -0.8, can control the third-order astigmatism of the eighth lens element within a reasonable range, and further can balance the astigmatism of the front end and the rear end, so that the image pickup lens group has good imaging quality.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.3 < Tr7r10/Tr11r14 < 0.8, wherein Tr7r10 is an interval distance on an optical axis from an object side surface of the fourth lens to an image side surface of the fifth lens, and Tr11r14 is an interval distance on an optical axis from an object side surface of the sixth lens to an image side surface of the seventh lens. More specifically, Tr7r10 and Tr11r14 further may satisfy: 0.4 < Tr7r10/Tr11r14 < 0.8. The requirement that Tr7r10/Tr11r14 is more than 0.3 is met, and the control of the whole camera lens group on dispersion can be effectively ensured.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.8 < ET6/CT6 < 1.1, wherein ET6 is the edge thickness of the sixth lens and CT6 is the central thickness of the sixth lens on the optical axis. The requirements of 0.8 < ET6/CT6 < 1.1 are met, and the processability and manufacturability of the sixth lens can be better ensured.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: DT32/DT82 < 0.4, where DT32 is the effective half aperture of the image-side surface of the third lens and DT82 is the effective half aperture of the image-side surface of the eighth lens. The requirement of DT32/DT82 is less than 0.4, the relative brightness of the edge position of the field of view of the camera lens group is improved, the chip response of the position is further improved, and the image is prevented from appearing dark corners.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.6 < SAG61/SAG71 < 0.9, wherein SAG61 is a distance between an intersection point of an object side surface of the sixth lens and the optical axis and an effective radius vertex of the object side surface of the sixth lens on the optical axis, and SAG71 is a distance between an intersection point of the object side surface of the seventh lens and the optical axis and an effective radius vertex of the object side surface of the seventh lens on the optical axis. The requirements of 0.6 & lt SAG61/SAG71 & lt 0.9 are met, the surface form of the aspheric lens is prevented from being excessively smooth, and the aspheric lens is molded, so that the requirements of processability and manufacturability are met.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 4 < f678/f < -2, wherein f678 is the combined focal length of the sixth lens, the seventh lens and the eighth lens, and f is the total effective focal length of the image pickup lens group. Satisfy-4 < f678/f < -2, can guarantee the focal power of sixth lens, seventh lens and eighth lens effectively, and then be favorable to rectifying the aberration of sixth lens, seventh lens and eighth lens, promote the performance of the lens group of making a video recording.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.8 < DT62/DT71 < 1, wherein DT62 is the effective half aperture of the image-side surface of the sixth lens, and DT71 is the effective half aperture of the object-side surface of the seventh lens. The requirements of 0.8 < DT62/DT71 < 1 are met, and the sixth lens and the seventh lens can meet the requirement of processability.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 2 < Tr11r14/CT8 < 3, wherein Tr11r14 is an interval distance on the optical axis from the object-side surface of the sixth lens to the image-side surface of the seventh lens, and CT8 is a center thickness on the optical axis of the eighth lens. The requirement that Tr11r14/CT8 is more than 2 and less than 3 is met, the curvature of field of the shooting lens group can be effectively controlled, and the curvature of field of the shooting lens group is in a reasonable range.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.8 < DT82/ImgH < 1, wherein DT82 is the effective semi-aperture of the image side surface of the eighth lens, and ImgH is half the diagonal length of the effective pixel area on the imaging surface of the imaging lens group. More specifically, DT82 and ImgH further satisfy: 0.8 < DT82/ImgH < 0.9. The requirements of DT82/ImgH of 0.8 < 1 are met, the machinability of the camera lens group can be effectively ensured, and the performance of the camera lens group can be ensured.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: TTL/ImgH < 1.4, wherein, is the spacing distance between the object side surface of the TTL first lens and the imaging surface of the camera lens group on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the camera lens group. More specifically, TTL and ImgH may further satisfy: TTL/ImgH is less than 1.30. The TTL/ImgH is less than 1.4, and the camera lens group can realize a large image surface and has a short total system length.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 5mm < ImgH2/f < 6mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the imaging lens group and f is the total effective focal length of the imaging lens group. The requirement that ImgH2/f is more than 5mm and less than 6mm is met, and the camera lens group has the characteristics of large image surface, long focal length and the like.
In an exemplary embodiment, an image pickup lens group according to the present application further includes a stop disposed between the object side and the first 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, eight lenses as described above. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the camera lens group is more favorable for production and processing and can be suitable for portable electronic equipment. The imaging lens group with the configuration can better correct primary aberration, has good imaging quality, and can be matched with a CCD with a large image plane. The camera lens group can have the characteristics of high pixel, large aperture, large image surface, ultra-thinness, easiness in processing 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, that is, at least one of the object-side surface of the first lens to the image-side surface of the eighth 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 in imaging can be eliminated as much as possible, and the imaging quality is further improved. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens is an aspherical mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.
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 eight lenses are exemplified in the embodiment, the imaging lens group is not limited to include eight 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element L3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 1 shows a basic parameter table of the imaging lens group of embodiment 1, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
Figure BDA0002209573300000081
TABLE 1
In the present example, the total effective focal length F of the imaging lens group is 6.54mm, the total length TTL of the imaging lens group (i.e., the distance on the optical axis from the object side surface S1 of the first lens L1 to the imaging surface S19 of the imaging lens group) is 7.83mm, the ImgH, which is half the diagonal length of the effective pixel area on the imaging surface S19 of the imaging lens group, is 6.14mm, and the F-number Fno of the imaging lens group is 1.74.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens L1 through the eighth lens L8 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
Figure BDA0002209573300000082
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 shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S16 used in example 14、A6、A8、A10、A12、A14、A16、A18And A20。
Figure BDA0002209573300000083
Figure BDA0002209573300000091
TABLE 2
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. 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 imaging lens group of embodiment 1, which represents distortion magnitude values corresponding to different image heights. 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 imaging surface after light passes through the lens. 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element L3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In this example, the total effective focal length F of the image pickup lens group is 6.63mm, the total length TTL of the image pickup lens group is 7.89mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S19 of the image pickup lens group is 6.14mm, and the F-number Fno of the image pickup lens group is 1.74.
Table 3 shows a basic parameter table of the image pickup lens group of embodiment 2, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 4 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.
Figure BDA0002209573300000101
TABLE 3
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.9511E-03 3.4999E-03 -6.5505E-03 6.4727E-03 -4.0551E-03 1.5803E-03 -3.7560E-04 4.9473E-05 -2.8029E-06
S2 -1.9774E-02 -1.0996E-02 2.8078E-02 -2.5726E-02 1.4159E-02 -5.0408E-03 1.1337E-03 -1.4661E-04 8.2955E-06
S3 -1.6224E-02 -4.2116E-03 1.3911E-02 -7.7211E-03 2.6384E-04 1.5959E-03 -7.6444E-04 1.5126E-04 -1.1364E-05
S4 1.0136E-02 -3.3730E-02 7.7630E-02 -1.0421E-01 8.8368E-02 -4.7647E-02 1.5839E-02 -2.9504E-03 2.3709E-04
S5 -1.7325E-02 6.6353E-03 -1.7542E-02 2.6383E-02 -2.4373E-02 1.4388E-02 -5.1312E-03 1.0194E-03 -8.5879E-05
S6 -1.1892E-02 -8.1802E-03 2.9928E-02 -5.4533E-02 5.9957E-02 -4.0087E-02 1.6109E-02 -3.5565E-03 3.3131E-04
S7 -1.6029E-02 -6.0758E-03 1.3247E-02 -2.2246E-02 1.9250E-02 -9.9131E-03 2.9547E-03 -4.5971E-04 2.8511E-05
S8 -2.4519E-02 4.1077E-03 -5.0459E-03 3.7210E-03 -2.9339E-03 1.5078E-03 -4.5816E-04 7.5056E-05 -5.0401E-06
S9 -2.7040E-02 4.9067E-03 -4.8152E-03 3.8001E-03 -2.9339E-03 1.5078E-03 -4.5816E-04 7.5056E-05 -5.0401E-06
S10 -2.6261E-02 5.1667E-03 -4.6727E-03 3.8109E-03 -2.9434E-03 1.5078E-03 -4.5816E-04 7.5056E-05 -5.0401E-06
S11 -3.4020E-02 4.8830E-03 6.3181E-04 -6.4604E-04 5.0998E-05 3.6992E-05 -1.1776E-05 1.4211E-06 -6.2691E-08
S12 -2.4872E-02 -2.2688E-03 4.2276E-03 -1.8196E-03 4.1881E-04 -5.8730E-05 5.0824E-06 -2.5099E-07 5.4324E-09
S13 1.7401E-02 -9.6157E-03 1.5484E-03 -2.7566E-05 -4.6659E-05 9.1084E-06 -7.5876E-07 3.0372E-08 -4.8359E-10
S14 3.7376E-02 -7.2817E-03 -6.2143E-04 6.0477E-04 -1.5001E-04 1.9791E-05 -1.4616E-06 5.6869E-08 -9.0919E-10
S15 -1.4913E-02 -4.3208E-04 6.8115E-04 -1.0314E-04 8.0034E-06 -3.7243E-07 1.0528E-08 -1.6743E-10 1.1512E-12
S16 -3.6128E-02 6.2136E-03 -9.0855E-04 9.6019E-05 -6.9193E-06 3.2238E-07 -9.1732E-09 1.4445E-10 -9.6642E-13
TABLE 4
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. 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 imaging lens group of embodiment 2, which represents distortion magnitude values corresponding to different image heights. 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 imaging surface after light passes through the lens. 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens L3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In this example, the total effective focal length F of the image pickup lens group is 6.63mm, the total length TTL of the image pickup lens group is 7.89mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S19 of the image pickup lens group is 6.14mm, and the F-number Fno of the image pickup lens group is 1.74.
Table 5 shows a basic parameter table of the imaging lens group of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 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.
Figure BDA0002209573300000111
Figure BDA0002209573300000121
TABLE 5
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.8594E-03 6.0646E-03 -1.0315E-02 1.0109E-02 -6.1548E-03 2.3162E-03 -5.2426E-04 6.4470E-05 -3.3405E-06
S2 -7.8901E-03 -3.1546E-02 4.8233E-02 -3.3963E-02 1.3693E-02 -3.2365E-03 4.0915E-04 -1.9715E-05 -2.9740E-07
S3 -4.0493E-03 -3.5142E-02 4.9829E-02 -3.0679E-02 8.9616E-03 -2.4307E-04 -5.8884E-04 1.5224E-04 -1.2296E-05
S4 1.3314E-02 -4.8644E-02 1.0357E-01 -1.4236E-01 1.2937E-01 -7.5413E-02 2.7034E-02 -5.3903E-03 4.5905E-04
S5 1.4453E-03 -2.0009E-02 1.6807E-02 -1.0176E-02 3.3072E-03 1.3242E-03 -1.6215E-03 5.7935E-04 -7.5196E-05
S6 6.2202E-03 -2.1503E-02 1.4929E-02 -6.4554E-03 2.1120E-04 2.5086E-03 -1.7955E-03 5.7009E-04 -7.2638E-05
S7 -1.0927E-02 2.2012E-02 -9.7165E-02 1.5479E-01 -1.5112E-01 9.2760E-02 -3.5022E-02 7.4455E-03 -6.7966E-04
S8 -2.4151E-02 4.4529E-02 -1.2181E-01 1.5308E-01 -1.1495E-01 5.4684E-02 -1.6577E-02 2.9683E-03 -2.3945E-04
S9 -3.0322E-02 4.0019E-02 -9.1787E-02 9.9443E-02 -6.0832E-02 2.3175E-02 -5.8720E-03 9.6996E-04 -7.8996E-05
S10 -2.4957E-02 9.9630E-03 -1.6481E-02 1.2000E-02 -4.3626E-03 7.9041E-04 -9.3417E-05 1.9479E-05 -2.5156E-06
S11 -3.7187E-02 1.1857E-02 -3.2880E-03 6.7370E-05 2.0362E-04 -6.7158E-05 1.0407E-05 -7.8579E-07 2.3039E-08
S12 -3.5303E-02 7.4258E-03 -2.7787E-05 -8.1317E-04 2.9490E-04 -5.4443E-05 5.8974E-06 -3.5512E-07 9.1219E-09
S13 1.2888E-02 -1.0531E-02 2.5480E-03 -3.8723E-04 3.9382E-05 -4.3211E-06 4.7998E-07 -2.9969E-08 7.0910E-10
S14 3.6393E-02 -9.7546E-03 1.6485E-04 5.4430E-04 -1.5685E-04 2.1514E-05 -1.6152E-06 6.3800E-08 -1.0392E-09
S15 -1.0770E-02 -3.0718E-03 1.4158E-03 -2.0662E-04 1.6557E-05 -8.0711E-07 2.3950E-08 -3.9913E-10 2.8711E-12
S16 -3.0743E-02 4.5022E-03 -5.5258E-04 5.4176E-05 -4.0145E-06 2.0226E-07 -6.2785E-09 1.0714E-10 -7.6934E-13
TABLE 6
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. 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 imaging lens group of embodiment 3, which represents distortion magnitude values corresponding to different image heights. 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 imaging surface after light passes through the lens. 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element L3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element L5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In this example, the total effective focal length F of the image pickup lens group is 6.67mm, the total length TTL of the image pickup lens group is 7.89mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 of the image pickup lens group is 6.14mm, and the F-number Fno of the image pickup lens group is 1.74.
Table 7 shows a basic parameter table of the imaging lens group of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0002209573300000131
TABLE 7
Figure BDA0002209573300000132
Figure BDA0002209573300000141
TABLE 8
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. 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 imaging lens group of embodiment 4, which represents distortion magnitude values corresponding to different image heights. 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 an imaging surface after light passes through the lens. 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element L3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In this example, the total effective focal length F of the image pickup lens group is 6.64mm, the total length TTL of the image pickup lens group is 7.89mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 of the image pickup lens group is 6.14mm, and the F-number Fno of the image pickup lens group is 1.74.
Table 9 shows a basic parameter table of the imaging lens group of embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 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.
Figure BDA0002209573300000142
Figure BDA0002209573300000151
TABLE 9
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.4081E-03 1.8873E-03 -3.5133E-03 3.1445E-03 -1.8383E-03 6.5943E-04 -1.4360E-04 1.6904E-05 -8.5095E-07
S2 -1.8165E-02 7.0944E-03 -6.0791E-03 6.9915E-03 -5.3336E-03 2.4336E-03 -6.5872E-04 9.7540E-05 -6.0924E-06
S3 -1.8656E-02 2.2976E-02 -3.3531E-02 3.8870E-02 -2.8915E-02 1.3513E-02 -3.8308E-03 6.0145E-04 -4.0023E-05
S4 1.9318E-03 -2.2163E-02 6.9244E-02 -1.0557E-01 9.6905E-02 -5.5402E-02 1.9353E-02 -3.7756E-03 3.1675E-04
S5 -2.3184E-02 1.2721E-02 -1.5918E-02 1.2236E-02 -4.0749E-03 -7.0462E-04 1.2092E-03 -4.0122E-04 4.6066E-05
S6 -1.3511E-02 -8.9115E-03 3.7303E-02 -6.9403E-02 7.6266E-02 -5.0920E-02 2.0446E-02 -4.5173E-03 4.2200E-04
S7 -1.6258E-02 -6.1580E-03 1.3257E-02 -2.2212E-02 1.9251E-02 -9.9131E-03 2.9547E-03 -4.5971E-04 2.8511E-05
S8 -2.3313E-02 4.0979E-03 -5.0152E-03 3.8023E-03 -2.9349E-03 1.5075E-03 -4.5816E-04 7.5056E-05 -5.0401E-06
S9 -2.4342E-02 5.2859E-03 -4.7606E-03 3.7914E-03 -2.9330E-03 1.5082E-03 -4.5816E-04 7.5056E-05 -5.0401E-06
S10 -2.7092E-02 5.4257E-03 -4.6745E-03 3.8030E-03 -2.9453E-03 1.5078E-03 -4.5816E-04 7.5056E-05 -5.0401E-06
S11 -3.1738E-02 1.7135E-03 2.7076E-03 -1.6251E-03 3.5424E-04 -2.3454E-05 -4.1827E-06 8.7012E-07 -4.5120E-08
S12 -1.9591E-02 -6.8133E-03 6.8941E-03 -2.8407E-03 6.6647E-04 -9.6457E-05 8.5809E-06 -4.3077E-07 9.3348E-09
S13 1.9948E-02 -1.1937E-02 1.9279E-03 7.0061E-05 -8.7633E-05 1.4831E-05 -1.1482E-06 4.3113E-08 -6.3689E-10
S14 3.9695E-02 -8.9733E-03 -7.4805E-04 8.5919E-04 -2.1720E-04 2.8310E-05 -2.0530E-06 7.8614E-08 -1.2421E-09
S15 -1.3101E-02 -1.4518E-03 9.4873E-04 -1.4174E-04 1.1300E-05 -5.4455E-07 1.5942E-08 -2.6190E-10 1.8549E-12
S16 -3.5790E-02 5.8650E-03 -7.9286E-04 7.6927E-05 -5.1430E-06 2.2523E-07 -6.0761E-09 9.1165E-11 -5.8383E-13
Watch 10
Fig. 10A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 5, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. 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 imaging lens group of embodiment 5, which represents distortion magnitude values corresponding to different image heights. 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 imaging surface after light passes through the lens. 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element L3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In this example, the total effective focal length F of the image pickup lens group is 6.53mm, the total length TTL of the image pickup lens group is 7.80mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 of the image pickup lens group is 6.14mm, and the F-number Fno of the image pickup lens group is 1.60.
Table 11 shows a basic parameter table of the imaging lens group of example 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 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.
Figure BDA0002209573300000161
Figure BDA0002209573300000171
TABLE 11
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.4506E-03 3.2589E-03 -4.9803E-03 4.2937E-03 -2.3199E-03 7.8193E-04 -1.6099E-04 1.8402E-05 -9.0960E-07
S2 -2.3009E-02 2.1219E-02 -2.4042E-02 2.1170E-02 -1.2274E-02 4.4956E-03 -1.0039E-03 1.2463E-04 -6.5958E-06
S3 -2.2544E-02 2.7125E-02 -3.2233E-02 3.0698E-02 -1.9438E-02 7.8558E-03 -1.9406E-03 2.6660E-04 -1.5582E-05
S4 1.8665E-04 -1.6066E-02 5.1030E-02 -7.3765E-02 6.3558E-02 -3.3816E-02 1.0871E-02 -1.9257E-03 1.4446E-04
S5 -1.6284E-02 -1.1950E-03 8.4503E-03 -1.5482E-02 1.5174E-02 -8.6879E-03 2.9694E-03 -5.4444E-04 4.0846E-05
S6 -1.0705E-02 -4.9563E-03 1.3687E-02 -2.0720E-02 1.9080E-02 -1.0607E-02 3.5509E-03 -6.4242E-04 4.7749E-05
S7 -1.7261E-02 -2.0837E-03 8.7287E-04 -4.0081E-03 4.7032E-03 -3.3020E-03 1.3838E-03 -3.1588E-04 3.0485E-05
S8 -2.0954E-02 -5.5458E-03 1.0931E-02 -1.6003E-02 1.3120E-02 -6.7532E-03 2.1007E-03 -3.5802E-04 2.5544E-05
S9 -3.3931E-02 8.9671E-03 -8.1290E-03 2.5694E-03 1.1144E-03 -1.3781E-03 4.9022E-04 -7.4274E-05 4.0502E-06
S10 -3.8054E-02 1.1305E-02 -6.6818E-03 6.2901E-04 1.9199E-03 -1.2970E-03 3.6899E-04 -4.9194E-05 2.5049E-06
S11 -3.5478E-02 1.7047E-02 -9.9220E-03 3.8940E-03 -1.0112E-03 1.7303E-04 -1.9219E-05 1.2548E-06 -3.5834E-08
S12 -2.7167E-02 1.1982E-02 -6.5950E-03 2.2234E-03 -4.5031E-04 5.5619E-05 -4.1335E-06 1.7063E-07 -3.0085E-09
S13 -4.6197E-04 -2.8753E-03 -8.3668E-05 8.2470E-05 -4.5018E-06 -2.0136E-06 3.7577E-07 -2.4305E-08 5.4876E-10
S14 3.5771E-02 -1.1010E-02 1.6635E-03 -1.0398E-04 -1.4239E-05 3.6485E-06 -3.2319E-07 1.3533E-08 -2.2407E-10
S15 -4.3401E-03 -7.3287E-03 2.6642E-03 -3.9381E-04 3.2802E-05 -1.6659E-06 5.1347E-08 -8.8517E-10 6.5567E-12
S16 -2.7741E-02 3.2940E-03 -3.1666E-04 2.4858E-05 -1.5935E-06 7.8419E-08 -2.6096E-09 5.0440E-11 -4.2424E-13
TABLE 12
Fig. 12A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 6, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. 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 imaging lens group of embodiment 6, which represents distortion magnitude values corresponding to different image heights. 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 imaging surface after light passes through the lens. 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element L3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element L5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In this example, the total effective focal length F of the image pickup lens group is 6.65mm, the total length TTL of the image pickup lens group is 7.92mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 of the image pickup lens group is 6.14mm, and the F-number Fno of the image pickup lens group is 1.68.
Table 13 shows a basic parameter table of the imaging lens group of example 7, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 14 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.
Figure BDA0002209573300000181
Watch 13
Figure BDA0002209573300000182
Figure BDA0002209573300000191
TABLE 14
Fig. 14A shows an on-axis chromatic aberration curve of the imaging lens group of example 7, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. 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 imaging lens group of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 7, which represents a deviation of different image heights on an imaging surface after light passes through the lens. 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element L3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element L5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In this example, the total effective focal length F of the image pickup lens group is 6.70mm, the total length TTL of the image pickup lens group is 7.90mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 of the image pickup lens group is 6.14mm, and the F-number Fno of the image pickup lens group is 1.71.
Table 15 shows a basic parameter table of the imaging lens group of example 8, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 shows high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0002209573300000192
Figure BDA0002209573300000201
Watch 15
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.3647E-03 3.8264E-03 -6.9694E-03 6.9248E-03 -4.2826E-03 1.6324E-03 -3.7584E-04 4.7505E-05 -2.5585E-06
S2 -2.5942E-02 1.8939E-02 -9.3910E-03 3.5239E-03 -1.4089E-03 5.6338E-04 -1.6204E-04 2.6201E-05 -1.7741E-06
S3 -3.8208E-02 3.2657E-02 -2.0329E-02 1.2349E-02 -7.3459E-03 3.4888E-03 -1.0769E-03 1.8667E-04 -1.3711E-05
S4 -1.2124E-02 -9.1787E-03 6.3211E-02 -1.1379E-01 1.1715E-01 -7.4032E-02 2.8336E-02 -6.0168E-03 5.4551E-04
S5 -6.0793E-03 -3.3040E-03 3.6837E-03 -8.0842E-03 1.1868E-02 -9.8890E-03 4.7981E-03 -1.2376E-03 1.3175E-04
S6 -7.5550E-03 -6.0931E-03 1.0010E-02 -1.4300E-02 1.3274E-02 -7.4671E-03 2.5659E-03 -4.7843E-04 3.6424E-05
S7 -1.4196E-02 -6.6792E-04 -3.3488E-03 -1.2306E-03 4.2057E-03 -3.8121E-03 1.7778E-03 -4.2468E-04 4.1814E-05
S8 -2.1484E-02 8.9389E-04 -3.9859E-04 -5.7923E-03 7.4111E-03 -4.7451E-03 1.6783E-03 -3.1246E-04 2.4141E-05
S9 -3.5729E-02 7.5859E-03 -1.2300E-02 6.2538E-03 -1.9024E-04 -1.1604E-03 4.8923E-04 -7.6658E-05 3.9597E-06
S10 -3.6210E-02 8.7172E-03 -1.0987E-02 5.9317E-03 -1.4441E-03 4.8910E-05 5.1565E-05 -9.0256E-06 3.8034E-07
S11 -4.0635E-02 1.2605E-02 -4.8924E-03 1.5297E-03 -5.3513E-04 1.6346E-04 -3.2940E-05 3.6211E-06 -1.6077E-07
S12 -4.2954E-02 7.2285E-03 3.4083E-04 -7.6897E-04 2.4475E-04 -4.3041E-05 4.5586E-06 -2.6681E-07 6.5553E-09
S13 1.3171E-02 -1.2481E-02 2.4762E-03 -1.5162E-05 -7.9286E-05 1.3853E-05 -1.0590E-06 3.9527E-08 -6.0555E-10
S14 2.8387E-02 -8.0586E-03 -1.2248E-03 1.1483E-03 -2.8608E-04 3.7133E-05 -2.7085E-06 1.0527E-07 -1.7003E-09
S15 -1.4971E-02 -1.2899E-03 1.0442E-03 -1.6137E-04 1.3089E-05 -6.3940E-07 1.9001E-08 -3.1804E-10 2.3088E-12
S16 -3.2697E-02 5.7717E-03 -8.1469E-04 8.4326E-05 -6.1198E-06 2.9107E-07 -8.4484E-09 1.3481E-10 -9.0709E-13
TABLE 16
Fig. 16A shows an on-axis chromatic aberration curve of an imaging lens group of embodiment 8, which represents a convergent focus deviation of light rays of different wavelengths after passing through a lens. 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 imaging lens group of embodiment 8, which represents distortion magnitude values corresponding to different image heights. 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 imaging surface after light passes through the lens. 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 imaging 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 capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter L9, and an image forming surface S19.
The first lens element L1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element L3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element L4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element L5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element L8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter L9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In this example, the total effective focal length F of the image pickup lens group is 6.68mm, the total length TTL of the image pickup lens group is 7.89mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S19 of the image pickup lens group is 6.14mm, and the F-number Fno of the image pickup lens group is 1.74.
Table 17 shows a basic parameter table of the imaging lens group of example 9, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 18 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.
Figure BDA0002209573300000211
TABLE 17
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -2.4046E-03 4.1471E-03 -7.7519E-03 8.0347E-03 -5.1762E-03 2.0532E-03 -4.9162E-04 6.4685E-05 -3.6282E-06
S2 -2.8689E-02 2.2221E-02 -1.7820E-02 1.4968E-02 -1.0128E-02 4.5402E-03 -1.2435E-03 1.8800E-04 -1.2029E-05
S3 -3.6669E-02 3.3004E-02 -2.7527E-02 2.6822E-02 -2.1430E-02 1.1417E-02 -3.7030E-03 6.6192E-04 -4.9940E-05
S4 -7.1176E-03 -1.3711E-02 7.2503E-02 -1.2971E-01 1.3675E-01 -8.9536E-02 3.5748E-02 -7.9654E-03 7.6227E-04
S5 9.1145E-03 -4.4111E-02 7.5714E-02 -9.0843E-02 7.4671E-02 -4.1284E-02 1.4843E-02 -3.1373E-03 2.9737E-04
S6 -1.1634E-02 1.6136E-02 -4.2766E-02 6.1488E-02 -5.4848E-02 3.0914E-02 -1.0638E-02 2.0514E-03 -1.6968E-04
S7 -1.7383E-02 1.3263E-02 -3.4849E-02 4.3599E-02 -3.6503E-02 1.9729E-02 -6.6806E-03 1.2933E-03 -1.0828E-04
S8 -2.6411E-02 1.7520E-02 -3.2707E-02 3.2192E-02 -1.9390E-02 6.9430E-03 -1.4137E-03 1.4429E-04 -4.9788E-06
S9 -3.6948E-02 1.7379E-02 -3.0107E-02 2.6001E-02 -1.2923E-02 3.6512E-03 -5.3403E-04 2.9362E-05 4.9139E-07
S10 -3.1664E-02 9.1535E-03 -1.2402E-02 9.3368E-03 -4.9055E-03 1.8129E-03 -4.4963E-04 6.6844E-05 -4.3462E-06
S11 -3.7017E-02 6.0242E-03 1.1652E-03 -1.2923E-03 2.9117E-04 -9.5848E-06 -7.5207E-06 1.3727E-06 -7.3972E-08
S12 -3.7731E-02 3.7817E-04 4.4902E-03 -2.1678E-03 5.2257E-04 -7.6657E-05 7.0384E-06 -3.7135E-07 8.5046E-09
S13 1.5776E-02 -1.0490E-02 1.5056E-03 1.2623E-04 -8.1100E-05 1.2075E-05 -8.3728E-07 2.7736E-08 -3.5026E-10
S14 3.2520E-02 -5.8953E-03 -1.9281E-03 1.1364E-03 -2.5353E-04 3.1003E-05 -2.1629E-06 8.0753E-08 -1.2538E-09
S15 -1.5665E-02 -6.2398E-05 6.1031E-04 -9.3339E-05 7.1057E-06 -3.2181E-07 8.8497E-09 -1.3749E-10 9.3068E-13
S16 -3.2300E-02 5.1108E-03 -6.4580E-04 5.8280E-05 -3.6482E-06 1.4752E-07 -3.5062E-09 4.2362E-11 -1.8289E-13
Watch 18
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 a lens. 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 imaging lens group of example 9, which represents distortion magnitude values corresponding to different image heights. Fig. 18D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 9, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 18A to 18D, the imaging lens group according to embodiment 9 can achieve good imaging quality.
In summary, examples 1 to 9 each satisfy the relationship shown in table 19.
Conditional expression (A) example 1 2 3 4 5 6 7 8 9
ImgH/Fno(mm) 3.52 3.53 3.52 3.52 3.53 3.84 3.66 3.59 3.52
f1/f7 0.87 0.93 0.87 0.96 0.88 0.92 1.00 0.97 0.96
|(R1+R4)/(R1-R4)| 3.51 3.18 2.73 3.91 3.66 4.35 3.75 4.17 3.43
DT32/DT41 0.91 0.97 0.99 0.97 0.96 0.97 0.96 0.96 0.97
(R11-R12)/(R11+R12) 0.09 0.05 0.07 0.12 0.03 0.08 0.12 0.11 0.09
R14/R15 0.83 0.90 1.17 1.28 0.87 1.77 1.30 1.26 1.18
R16/f8 -0.87 -0.91 -0.98 -1.13 -0.90 -1.20 -1.05 -1.09 -1.05
Tr7r10/Tr11r14 0.46 0.45 0.42 0.41 0.45 0.73 0.60 0.53 0.44
ET6/CT6 1.02 0.89 0.90 0.85 0.94 1.00 0.85 0.85 0.81
DT32/DT82 0.27 0.28 0.29 0.31 0.28 0.32 0.31 0.32 0.30
SAG61/SAG71 0.69 0.72 0.67 0.77 0.74 0.89 0.86 0.80 0.77
f678/f -2.11 -2.87 -2.83 -3.03 -2.92 -2.27 -2.95 -2.97 -3.23
DT62/DT71 0.94 0.87 0.86 0.86 0.88 0.93 0.88 0.88 0.86
Tr11r14/CT8 2.72 2.55 2.77 2.63 2.47 2.62 2.51 2.54 2.67
DT82/ImgH 0.87 0.87 0.87 0.83 0.87 0.84 0.85 0.84 0.85
TTL/ImgH 1.28 1.29 1.29 1.29 1.29 1.27 1.29 1.29 1.29
ImgH2/f(mm) 5.76 5.68 5.68 5.64 5.67 5.77 5.66 5.62 5.64
Watch 19
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.
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 (30)

1. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:
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 optical power;
a sixth lens having a refractive power, an image-side surface of which is concave;
a seventh lens having a refractive power, an image-side surface of which is convex;
an eighth lens having optical power; wherein,
half of the diagonal length ImgH of the effective pixel area on the imaging surface of the image pickup lens group and the F-number Fno of the image pickup lens group satisfy: ImgH/Fno > 3.5 mm.
2. The imaging lens group according to claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f7 of the seventh lens satisfy: f1/f7 is more than 0.7 and less than or equal to 1.
3. The imaging lens group according to claim 1, wherein a radius of curvature R1 of an object-side surface of the first lens and a radius of curvature R4 of an image-side surface of the second lens satisfy: 2.5 < | (R1+ R4)/(R1-R4) | < 4.5.
4. The imaging lens group according to claim 1, wherein an effective semi-aperture DT32 of an image side surface of the third lens and an effective semi-aperture DT41 of an object side surface of the fourth lens satisfy: 0.8 < DT32/DT41 < 1.
5. The imaging lens group according to claim 1, wherein a radius of curvature R11 of an object-side surface of the sixth lens and a radius of curvature R12 of an image-side surface of the sixth lens satisfy: (R11-R12)/(R11+ R12) < 0.2.
6. The imaging lens group according to claim 1, wherein a radius of curvature R14 of an image-side surface of the seventh lens and a radius of curvature R15 of an object-side surface of the eighth lens satisfy: 0.8 < R14/R15 < 2.
7. The imaging lens group according to claim 1, wherein a radius of curvature R16 of an image-side surface of the eighth lens and an effective focal length f8 of the eighth lens satisfy: -1.3 < R16/f8 < -0.8.
8. The imaging lens group according to claim 1, wherein a separation distance Tr7r10 on the optical axis from an object side surface of the fourth lens to an image side surface of the fifth lens and a separation distance Tr11r14 on the optical axis from an object side surface of the sixth lens to an image side surface of the seventh lens satisfy: 0.3 < Tr7r10/Tr11r14 < 0.8.
9. The imaging lens group according to claim 1, wherein an edge thickness ET6 of the sixth lens and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.8 < ET6/CT6 < 1.1.
10. The imaging lens group according to claim 1, wherein an effective semi-aperture DT32 of an image side surface of the third lens and an effective semi-aperture DT82 of an image side surface of the eighth lens satisfy: DT32/DT82 < 0.4.
11. The imaging lens group according to claim 1, wherein a distance SAG61 from an intersection point of an object side surface of the sixth lens and the optical axis to an effective radius vertex of an object side surface of the sixth lens on the optical axis to an intersection point of an object side surface of the seventh lens and the optical axis to an effective radius vertex of an object side surface of the seventh lens on the optical axis to a distance SAG71 satisfies: 0.6 < SAG61/SAG71 < 0.9.
12. An imaging lens group according to claim 1, wherein a combined focal length f678 of said sixth lens, said seventh lens and said eighth lens and a total effective focal length f of said imaging lens group satisfy: -4 < f678/f < -2.
13. The imaging lens group according to claim 1, wherein an effective semi-aperture DT62 of an image-side surface of the sixth lens and an effective semi-aperture DT71 of an object-side surface of the seventh lens satisfy: 0.8 < DT62/DT71 < 1.
14. The imaging lens group according to claim 1, wherein a separation distance Tr11r14 between an object side surface of the sixth lens and an image side surface of the seventh lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: 2 < Tr11r14/CT8 < 3.
15. An imaging lens group according to any one of claims 1 to 14, wherein an effective semi-aperture DT82 of an image side surface of the eighth lens and a half ImgH of a diagonal length of an effective pixel area on an imaging surface of the imaging lens group satisfy: 0.8 < DT82/ImgH < 1.
16. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:
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 optical power;
a sixth lens having optical power;
a seventh lens having a refractive power, an image-side surface of which is convex;
an eighth lens having optical power; wherein,
a distance TTL between an object side surface of the first lens element and an imaging surface of the image capturing lens group on the optical axis, a half ImgH of a diagonal length of an effective pixel area on the imaging surface of the image capturing lens group, and a total effective focal length f of the image capturing lens group satisfy the following conditional expressions:
TTL/ImgH＜1.4；
5mm＜ImgH2/f＜6mm。
17. the imaging lens group according to claim 16, wherein an effective focal length f1 of the first lens and an effective focal length f7 of the seventh lens satisfy: f1/f7 is more than 0.7 and less than or equal to 1.
18. The imaging lens group of claim 16, wherein a radius of curvature R1 of an object-side surface of the first lens and a radius of curvature R4 of an image-side surface of the second lens satisfy: 2.5 < | (R1+ R4)/(R1-R4) | < 4.5.
19. The imaging lens group of claim 16, wherein an effective semi-aperture diameter DT32 of an image-side surface of the third lens and an effective semi-aperture diameter DT41 of an object-side surface of the fourth lens satisfy: 0.8 < DT32/DT41 < 1.
20. The imaging lens group of claim 16, wherein a radius of curvature R11 of an object-side surface of the sixth lens and a radius of curvature R12 of an image-side surface of the sixth lens satisfy: (R11-R12)/(R11+ R12) < 0.2.
21. The imaging lens group of claim 16, wherein a radius of curvature R14 of an image-side surface of the seventh lens and a radius of curvature R15 of an object-side surface of the eighth lens satisfy: 0.8 < R14/R15 < 2.
22. The imaging lens group of claim 16, wherein a radius of curvature R16 of an image-side surface of the eighth lens and an effective focal length f8 of the eighth lens satisfy: -1.3 < R16/f8 < -0.8.
23. The imaging lens group according to claim 16, wherein a separation distance Tr7r10 on the optical axis from an object side surface of the fourth lens to an image side surface of the fifth lens and a separation distance Tr11r14 on the optical axis from an object side surface of the sixth lens to an image side surface of the seventh lens satisfy: 0.3 < Tr7r10/Tr11r14 < 0.8.
24. The imaging lens group of claim 16, wherein an edge thickness ET6 of the sixth lens and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.8 < ET6/CT6 < 1.1.
25. The imaging lens group of claim 16, wherein an effective semi-aperture diameter DT32 of an image side surface of the third lens and an effective semi-aperture diameter DT82 of an image side surface of the eighth lens satisfy: DT32/DT82 < 0.4.
26. The imaging lens group according to claim 16, wherein a distance SAG61 from an intersection point of an object side surface of the sixth lens and the optical axis to an effective radius vertex of an object side surface of the sixth lens on the optical axis to an intersection point of an object side surface of the seventh lens and the optical axis to an effective radius vertex of an object side surface of the seventh lens on the optical axis to a distance SAG71 satisfies: 0.6 < SAG61/SAG71 < 0.9.
27. The imaging lens group according to claim 16, wherein a combined focal length f678 of the sixth lens, the seventh lens and the eighth lens and a total effective focal length f of the imaging lens group satisfy: -4 < f678/f < -2.
28. The imaging lens group of claim 16, wherein an effective semi-aperture diameter DT62 of an image-side surface of the sixth lens and an effective semi-aperture diameter DT71 of an object-side surface of the seventh lens satisfy: 0.8 < DT62/DT71 < 1.
29. The imaging lens group of claim 16, wherein a separation distance Tr11r14 between an object side surface of the sixth lens and an image side surface of the seventh lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: 2 < Tr11r14/CT8 < 3.
30. An imaging lens group according to any one of claims 16 to 29, wherein an effective semi-aperture DT82 of an image side surface of the eighth lens and a half ImgH of a diagonal length of an effective pixel area on an imaging surface of the imaging lens group satisfy: 0.8 < DT82/ImgH < 1.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110456490A (en) * 2019-09-20 2019-11-15 浙江舜宇光学有限公司 Imaging lens system group
JP6917118B1 (en) * 2020-10-14 2021-08-11 ジョウシュウシ レイテック オプトロニクス カンパニーリミテッド Imaging optical lens
WO2022139472A1 (en) * 2020-12-22 2022-06-30 엘지이노텍 주식회사 Optical system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110456490A (en) * 2019-09-20 2019-11-15 浙江舜宇光学有限公司 Imaging lens system group
CN110456490B (en) * 2019-09-20 2024-04-23 浙江舜宇光学有限公司 Image pickup lens group
JP6917118B1 (en) * 2020-10-14 2021-08-11 ジョウシュウシ レイテック オプトロニクス カンパニーリミテッド Imaging optical lens
WO2022139472A1 (en) * 2020-12-22 2022-06-30 엘지이노텍 주식회사 Optical system

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