CN110618522B - Image pickup lens group - Google Patents

Image pickup lens group Download PDF

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Publication number
CN110618522B
CN110618522B CN201911038319.2A CN201911038319A CN110618522B CN 110618522 B CN110618522 B CN 110618522B CN 201911038319 A CN201911038319 A CN 201911038319A CN 110618522 B CN110618522 B CN 110618522B
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lens
imaging
image
lens group
optical axis
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CN110618522A (en
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肖海东
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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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

本申请公开了一种摄像透镜组，其沿着光轴由物侧至像侧依序包括：具有正光焦度的第一透镜，其物侧面为凸面；具有光焦度的第二透镜；具有光焦度的第三透镜，其像侧面为凹面；具有光焦度的第四透镜；具有光焦度的第五透镜；具有光焦度的第六透镜，其像侧面为凸面；具有负光焦度的第七透镜，其像侧面为凹面。其中，摄像透镜组的总有效焦距f与摄像透镜组的入瞳直径EPD满足：f/EPD＜1.6；摄像透镜组的最大视场角FOV满足：tan(FOV)＞12。

The present application discloses a camera lens group, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power, whose object side surface is convex; a second lens with optical power; a third lens with optical power, whose image side surface is concave; a fourth lens with optical power; a fifth lens with optical power; a sixth lens with optical power, whose image side surface is convex; and a seventh lens with negative optical power, whose image side surface is concave. The total effective focal length f of the camera lens group and the entrance pupil diameter EPD of the camera lens group satisfy: f/EPD＜1.6; and the maximum field of view FOV of the camera lens group satisfies: tan(FOV)＞12.

Description

Image pickup lens group
Technical Field
The application relates to the field of optical elements, in particular to an imaging lens group.
Background
In recent years, with the development of shooting technology of portable electronic products such as mobile phones, lenses of portable electronic products such as mobile phones with high imaging quality are becoming more and more popular. However, the thickness of the portable electronic products such as the mobile phone is reduced, so that the total length of the camera lens is limited, and the design difficulty of the portable electronic products such as the mobile phone is increased.
Meanwhile, with the improvement of the performance of a photosensitive coupling element (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) element and the reduction of the pixel size of the conventional imaging lens of portable electronic products such as mobile phones, the corresponding imaging lens group is required to have higher luminous flux.
How to realize miniaturization and increase the light entering quantity of the image pickup lens group, so that the image pickup lens group can clearly image a scene is one of the problems to be solved in the field of lens design.
Disclosure of Invention
An aspect of the present application provides an image capturing lens assembly including, in order from an object side to an image side along an optical axis, a first lens having positive optical power, an object side being convex, a second lens having optical power, a third lens having optical power, an image side being concave, a fourth lens having optical power, a fifth lens having optical power, a sixth lens having optical power, an image side being convex, and a seventh lens having negative optical power, an image side being concave.
In one embodiment, the total effective focal length f of the imaging lens group and the entrance pupil diameter EPD of the imaging lens group may satisfy f/EPD <1.6.
In one embodiment, the maximum field angle FOV of the imaging lens group may satisfy tan (FOV) >12.
In one embodiment, the F number FNO of the imaging lens group, the distance TTL between the object side surface of the first lens and the imaging surface of the imaging lens group on the optical axis, and half of the diagonal length of the effective pixel area on the imaging surface of the imaging lens group, imgH, can satisfy FNO×TTL/ImgH <2.2mm.
In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the image capturing lens assembly may satisfy 1.2≤f1/f <2.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens may satisfy-3 < f1/f7< -1.9.
In one embodiment, the radius of curvature R14 of the image side of the seventh lens and the total effective focal length f of the imaging lens group may satisfy 0.5< R14/f <1.
In one embodiment, the radius of curvature R12 of the image side of the sixth lens and the radius of curvature R13 of the object side of the seventh lens may satisfy 0.5< R12/R13<1.
In one embodiment, the combined focal length f1234 of the first, second, third, and fourth lenses and the total effective focal length f of the imaging lens group may satisfy 1< f1234/f <1.7.
In one embodiment, the separation distance T23 of the second lens and the third lens on the optical axis and the separation distance T34 of the third lens and the fourth lens on the optical axis can satisfy 0.5< T23/T34<1.5.
In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis may satisfy 1.4< CT1/(CT2+CT3) <2.
In one embodiment, the distance SAG71 between the intersection point of the object side surface of the seventh lens and the optical axis and the effective radius vertex of the object side surface of the seventh lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis can meet the following conditions that-4.5 < SAG71/CT7< -2.
In one embodiment, a distance SAG32 between an intersection point of the image side surface of the third lens and the optical axis and an effective radius vertex of the image side surface of the third lens on the optical axis and a distance SAG41 between an intersection point of the object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the fourth lens on the optical axis may satisfy SAG32/SAG41<0.
In one embodiment, the effective half-caliber DT11 of the object side of the first lens and the effective half-caliber DT72 of the image side of the seventh lens may satisfy 0.3< DT11/DT72<0.5.
In one embodiment, the effective half-caliber DT12 of the image side of the first lens and the effective half-caliber DT51 of the object side of the fifth lens may satisfy 0.5< DT12/DT51<1.
In one embodiment, the interval SAG52 on the optical axis between the intersection point of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens and the interval SAG61 on the optical axis between the intersection point of the object side surface of the sixth lens and the optical axis and the effective radius vertex of the object side surface of the sixth lens may satisfy 0.3< SAG52/SAG61<1.1.
In one embodiment, the effective half-caliber DT42 of the image side of the fourth lens and the effective half-caliber DT51 of the object side of the fifth lens may satisfy 0.5< DT42/DT51<1.
In one embodiment, the separation distance T45 of the fourth lens and the fifth lens on the optical axis and the separation distance T56 of the fifth lens and the sixth lens on the optical axis can satisfy 2< T45/T56<5.
In one embodiment, the second lens may be a glass material.
In one embodiment, the second lens is made of a glass material, and the refractive index of the second lens is not smaller than the refractive index of any other lens in the image pickup lens group.
The application adopts a plurality of (e.g. seven) lenses, and the optical imaging lens group has at least one beneficial effect of miniaturization, ultra-thin, large aperture, large image surface, high imaging quality and the like by reasonably distributing the focal power, the surface type, the center thickness of each lens, the axial spacing between each lens and the like.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, 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 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 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 image pickup lens group of embodiment 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 image pickup 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 image pickup lens group of embodiment 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 image pickup lens group of embodiment 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 image pickup lens group of embodiment 6;
Fig. 13 shows a schematic configuration diagram 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 image pickup lens group of embodiment 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 image pickup lens group of embodiment 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 the image pickup lens group of embodiment 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 image pickup lens group of embodiment 10;
Fig. 21 shows a schematic configuration diagram 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 image pickup lens group of embodiment 11;
Fig. 23 is a schematic diagram showing the structure 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 magnification chromatic aberration curve, respectively, of the image pickup lens group of embodiment 12.
Detailed Description
For a better understanding of the application, various aspects of the 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 application and is not intended to limit the scope of the 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 the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region, and 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 referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the 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, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The image pickup lens group according to the exemplary embodiment of the present application may include seven lenses having optical power, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, respectively. The seven lenses are arranged in order from the object side to the image side along the optical axis. Any two adjacent lenses among the first lens to the seventh lens can have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have positive power, the object-side surface thereof may be convex, the second lens may have positive power or negative power, the third lens may have positive power or negative power, the image-side surface thereof may be concave, the fourth lens may have positive power or negative power, the fifth lens may have positive power or negative power, the sixth lens may have positive power or negative power, the image-side surface thereof may be convex, and the seventh lens may have negative power, the image-side surface thereof may be concave.
In an exemplary embodiment, the photographing lens assembly according to the present application may satisfy f/EPD <1.6, where f is the total effective focal length of the photographing lens assembly and EPD is the entrance pupil diameter of the photographing lens assembly. The f/EPD is less than 1.6, the luminous flux of the camera lens group can be increased, and the imaging effect of the camera lens group in a dark environment is enhanced.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy tan (FOV) >12, where FOV is a maximum field angle of the image pickup lens group. And tan (FOV) is satisfied to be more than 12, so that the imaging lens group has a large enough field angle, is compatible with a large enough field range, and improves imaging efficiency.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy fno×ttl/ImgH <2.2mm, where Fno is an F-number of the image pickup lens group, TTL is a distance on an optical axis from an object side surface of the first lens to an imaging surface of the image pickup lens group, and ImgH is a half of a diagonal length of an effective pixel area on the imaging surface of the image pickup lens group. The Fno multiplied by TTL/ImgH is smaller than 2.2mm, so that the size of the image pickup lens group is effectively controlled on the premise of having a large aperture, the ultra-thin characteristic of the image pickup lens group is ensured, the ultra-large-size photosurface can be compatible, and the imaging efficiency is greatly improved.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 1.2≤f1/f <2, where f1 is an effective focal length of the first lens and f is a total effective focal length of the image pickup lens group. More specifically, f1 and f may further satisfy 1.2≤f1/f <1.8. Satisfying 1.2 < f1/f < 2>, the negative astigmatism of the first lens can be reasonably controlled, so that the negative astigmatism of the first lens and the positive astigmatism generated by the following lens are mutually counteracted, and the imaging lens group obtains good imaging quality.
In an exemplary embodiment, the imaging lens group according to the present application may satisfy-3 < f1/f7< -1.9, where f1 is an effective focal length of the first lens and f7 is an effective focal length of the seventh lens. More specifically, f1 and f7 may further satisfy-2.8 < f1/f7< -1.9. The deflection angle of light rays can be reduced and the imaging quality of the imaging lens group can be improved by satisfying-3 f1/f7< -1.9.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 0.5< R14/f <1, where R14 is a radius of curvature of an image side surface of the seventh lens, and f is a total effective focal length of the image pickup lens group. More specifically, R14 and f may further satisfy 0.5< R14/f <0.7. Satisfying 0.5< R14/f <1, facilitating molding and demolding of the seventh lens.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 0.5< R12/R13<1, where R12 is a radius of curvature of an image side surface of the sixth lens and R13 is a radius of curvature of an object side surface of the seventh lens. Satisfying 0.5< R12/R13<1, the structure of the sixth lens and the seventh lens can be effectively controlled, which is beneficial to molding and demolding of the sixth lens and the seventh lens.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 1< f1234/f <1.7, where f1234 is a combined focal length of the first lens, the second lens, the third lens, and the fourth lens, and f is a total effective focal length of the image pickup lens group. Satisfying 1< f1234/f <1.7, reasonable negative astigmatism can be obtained, positive astigmatism of the rear lens is counteracted, and good imaging quality is obtained for the image pickup lens group.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 0.5< T23/T34<1.5, where T23 is a separation distance of the second lens and the third lens on the optical axis, and T34 is a separation distance of the third lens and the fourth lens on the optical axis. Satisfying 0.5< T23/T34<1.5, not only can effectively control the field curvature balance of the image pickup lens group to ensure that the image pickup lens group has reasonable field curvature, but also can control the interval distance from the second lens to the fourth lens to be uniform and reasonable, thereby being beneficial to enhancing the reliability of the image pickup lens group.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 1.4< ct1/(ct2+ct3) <2, where CT1 is a center thickness of the first lens on the optical axis, CT2 is a center thickness of the second lens on the optical axis, and CT3 is a center thickness of the third lens on the optical axis. More specifically, it is further possible to satisfy 1.4< CT1/(CT2+CT3) <1.8. Satisfying 1.4< CT 1/(CT2+CT3) <2, not only can effectively control the field curvature balance of the photographing lens group, so that the photographing lens group has reasonable field curvature, but also can control the structure of the first lens to be uniform and reasonable, thereby being beneficial to the molding of the first lens.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy-4.5 < SAG71/CT7< -2, wherein SAG71 is a distance between an intersection point of an object side surface of the seventh lens and an optical axis to an effective radius vertex of the object side surface of the seventh lens on the optical axis, and CT7 is a center thickness of the seventh lens on the optical axis. Meets the requirements of-4.5 < SAG71/CT7< -2, can effectively restrict the weak thickness ratio of the seventh lens, reduces the structural sensitivity of the seventh lens, and is beneficial to molding and demolding of the seventh lens.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy SAG32/SAG41<0, wherein SAG32 is a distance on the optical axis between an intersection point of the image side surface of the third lens and the optical axis and an effective radius vertex of the image side surface of the third lens, and SAG41 is a distance on the optical axis between an intersection point of the object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the fourth lens. And SAG32/SAG41<0 is satisfied, the structure weak-thickness ratio of the third lens and the fourth lens can be reasonably controlled, and the forming and demolding of the third lens and the fourth lens are facilitated.
In an exemplary embodiment, the imaging lens group according to the present application may satisfy 0.3< DT11/DT72<0.5, where DT11 is the effective half-caliber of the object side of the first lens and DT72 is the effective half-caliber of the image side of the seventh lens. Satisfying 0.3< D11/DT 72<0.5, the structural level difference of the first lens to the seventh lens can be effectively controlled, which is beneficial to lens assembly.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 0.5< dt12/DT51<1, where DT12 is an effective half-caliber of an image side surface of the first lens and DT51 is an effective half-caliber of an object side surface of the fifth lens. More specifically, DT12 and DT51 may further satisfy 0.6< DT12/DT51<0.9. The structural step difference of the first lens to the fifth lens can be effectively controlled to be beneficial to lens assembly when the ratio of the D/T12 to the D/T51 is 0.5< 1.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 0.3< SAG52/SAG61<1.1, wherein SAG52 is a distance on the optical axis between an intersection point of the image side surface of the fifth lens and the optical axis and an effective radius vertex of the image side surface of the fifth lens, and SAG61 is a distance on the optical axis between an intersection point of the object side surface of the sixth lens and the optical axis and an effective radius vertex of the object side surface of the sixth lens. Satisfying 0.3< SAG52/SAG61<1.1, the structure weak-thickness ratio of the fifth lens and the sixth lens can be reasonably controlled, and the molding and demolding of the fifth lens and the sixth lens are facilitated.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 0.5< dt42/DT51<1, where DT42 is an effective half-caliber of an image side surface of the fourth lens and DT51 is an effective half-caliber of an object side surface of the fifth lens. More specifically, DT42 and DT51 may further satisfy 0.6< DT42/DT51<1. The structural level difference of the fourth lens to the fifth lens can be effectively controlled to satisfy 0.5< D T42/DT51<1, which is beneficial to lens assembly.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy 2< T45/T56<5, where T45 is a separation distance of the fourth lens and the fifth lens on the optical axis, and T56 is a separation distance of the fifth lens and the sixth lens on the optical axis. Satisfies 2< T45/T56<5, and can effectively control the field curvature balance of the imaging lens group, so that the imaging lens group has reasonable field curvature.
In an exemplary embodiment, the second lens of the image pickup lens group according to the present application may be a glass material. The glass material may provide a high refractive index that the plastic material cannot provide. The high refractive index is beneficial to improving the resolution of the camera lens group, and is beneficial to improving the temperature drift of the system focal length generated by the plastic lens and enhancing the system reliability.
In an exemplary embodiment, the image pickup lens group according to the present application may satisfy that N2. Gtoreq.ni, where N2 is the refractive index of the second lens and Ni is the refractive index of the i (i=1, 3, 4, 5, 6, 7) th lens. Satisfies N2 not less than Ni, is favorable for improving the resolution of the image pickup lens group and enhances the reliability of the image pickup lens group.
The application provides a seven-piece type photographing lens group with high imaging quality and adopting an aspheric surface. The image pickup lens group according to the above embodiment of the present application may employ a plurality of lenses, such as seven lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens, incident light rays can be effectively converged, the total optical length of the image pickup lens group is reduced, and the processability of the image pickup lens group is improved, so that the image pickup lens group is more beneficial to production and processing.
In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface of the first lens to the image side surface of the seventh lens is an aspherical mirror. The aspherical lens is characterized in that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. 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, and the seventh lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are aspherical mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses making up the imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the scope of the application as claimed. For example, although seven lenses are described as an example in the embodiment, the image pickup lens group is not limited to include seven lenses. The camera lens group may also include other numbers of lenses, if desired.
Specific examples of the 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 includes, in order from an object side to an image side, a stop STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an optical filter E8 and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 1 shows the basic parameter table of the image pickup lens group of embodiment 1, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
In this example, the total effective focal length f of the imaging lens group is 4.34mm, 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 E1 to the imaging surface S17 of the imaging lens group) is 5.48mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 85.9 °.
In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
Where x is the distance vector height of the aspherical surface at a position h in the optical axis direction from the apex of the aspherical surface, c is the paraxial curvature of the aspherical surface, c=1/R (i.e., paraxial curvature c is the reciprocal of the radius of curvature R in table 1 above), k is a conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. The following Table 2 shows the higher order coefficients A 4、A6、A8、A10、A12、A14、A16、A18 and A 20 that can be used for each of the aspherical mirrors S1-S14 in example 1.
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -4.8185E-03 6.8292E-03 -1.3748E-02 9.2986E-03 2.3460E-03 -8.6815E-03 5.9443E-03 -1.7979E-03 2.0265E-04
S2 -1.7284E-02 -1.8948E-02 5.3258E-02 -1.1624E-01 1.5774E-01 -1.2389E-01 5.5631E-02 -1.3331E-02 1.3212E-03
S3 -1.2184E-02 -1.6138E-03 4.2998E-02 -1.3495E-01 2.1632E-01 -1.9036E-01 9.4178E-02 -2.4531E-02 2.6163E-03
S4 -1.2389E-02 5.6041E-02 -1.5843E-01 3.6994E-01 -6.0255E-01 6.3353E-01 -4.0714E-01 1.4423E-01 -2.1244E-02
S5 -5.7839E-02 2.1792E-02 -3.8186E-02 4.5769E-02 -9.4705E-02 1.4824E-01 -1.3041E-01 6.0149E-02 -1.1007E-02
S6 -4.2566E-02 2.3652E-02 -1.1407E-01 3.4366E-01 -6.5359E-01 7.5489E-01 -5.1362E-01 1.9091E-01 -2.9712E-02
S7 -3.5506E-02 4.0336E-02 -1.9510E-01 5.0091E-01 -8.2528E-01 8.3774E-01 -5.0956E-01 1.6897E-01 -2.3232E-02
S8 -5.3136E-02 4.1901E-02 -1.0875E-01 1.7145E-01 -1.8796E-01 1.3320E-01 -5.8184E-02 1.4096E-02 -1.4281E-03
S9 -1.0057E-01 9.3256E-02 -1.1326E-01 1.0649E-01 -7.1117E-02 3.0896E-02 -8.3085E-03 1.2508E-03 -7.9754E-05
S10 2.7481E-02 -7.6984E-02 6.1844E-02 -2.9224E-02 7.8725E-03 -1.0726E-03 3.0187E-05 8.8056E-06 -7.3876E-07
S11 2.6134E-02 -4.4501E-02 1.2609E-02 3.6834E-03 -4.0580E-03 1.2920E-03 -2.0022E-04 1.5492E-05 -4.8530E-07
S12 1.1910E-01 -7.2810E-02 2.5052E-02 -2.7938E-03 -1.0289E-03 4.1871E-04 -6.1826E-05 4.2362E-06 -1.1178E-07
S13 -2.1776E-02 -5.1631E-02 4.2964E-02 -1.4466E-02 2.7446E-03 -3.1775E-04 2.2447E-05 -8.9666E-07 1.5638E-08
S14 -1.3270E-01 5.1907E-02 -1.8637E-02 5.3129E-03 -1.0944E-03 1.4982E-04 -1.2725E-05 6.0274E-07 -1.2130E-08
TABLE 2
Fig. 2A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 1, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve of the imaging lens group of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the image pickup lens group of embodiment 1, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 2A to 2D, the imaging lens group provided in embodiment 1 can achieve good imaging 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 portions similar to embodiment 1 will be omitted for 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 includes, in order from an object side to an image side, a stop STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an optical filter E8 and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.34mm, the total length TTL of the imaging lens group is 5.72mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 85.6 °.
Table 3 shows the 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 the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 3 Table 3
TABLE 4 Table 4
Fig. 4A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 2, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 4B shows an astigmatism curve of the imaging lens group of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the image pickup lens group of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 2, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 4A to 4D, the imaging lens group provided in 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 includes, in order from an object side to an image side, a stop STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an optical filter E8 and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.08mm, the total length TTL of the imaging lens group is 5.58mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 89.0 °.
Table 5 shows a basic parameter table of the image pickup lens group of embodiment 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 5
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.0199E-02 3.9942E-02 -1.1744E-01 1.9269E-01 -1.9511E-01 1.2174E-01 -4.5515E-02 9.2646E-03 -7.8735E-04
S2 -1.7235E-02 -7.0355E-02 1.2884E-01 -2.7258E-01 4.5390E-01 -4.4187E-01 2.4128E-01 -6.9215E-02 8.1332E-03
S3 -6.4793E-04 -6.2489E-02 8.0392E-02 -9.0701E-02 1.9059E-01 -2.4240E-01 1.5435E-01 -4.7753E-02 5.7628E-03
S4 3.3282E-02 -1.2470E-01 2.8284E-01 -4.1405E-01 4.5166E-01 -3.5670E-01 1.7578E-01 -4.5901E-02 4.8868E-03
S5 -1.5778E-02 -1.2391E-01 2.6338E-01 -5.2475E-01 8.1814E-01 -8.4314E-01 5.1833E-01 -1.6886E-01 2.2364E-02
S6 -7.1458E-03 -1.2723E-01 3.4614E-01 -6.9183E-01 9.4103E-01 -8.1996E-01 4.3516E-01 -1.2664E-01 1.5462E-02
S7 -1.4793E-02 6.2827E-02 -2.9881E-01 7.0730E-01 -1.0526E+00 9.8325E-01 -5.6002E-01 1.7607E-01 -2.3154E-02
S8 -4.7318E-02 2.1028E-02 -4.6461E-02 8.2517E-02 -1.0647E-01 8.3696E-02 -3.8534E-02 9.4639E-03 -9.4665E-04
S9 -9.6889E-02 8.1789E-02 -8.8457E-02 7.0339E-02 -3.9573E-02 1.4844E-02 -3.5715E-03 4.9738E-04 -2.9971E-05
S10 -1.5238E-01 1.2972E-01 -9.8960E-02 4.9629E-02 -1.6170E-02 3.4025E-03 -4.4896E-04 3.3978E-05 -1.1281E-06
S11 -4.2010E-02 4.4350E-02 -2.9988E-02 9.5417E-03 -1.6915E-03 7.9969E-05 3.3750E-05 -6.5401E-06 3.5350E-07
S12 1.0438E-01 -7.2857E-02 4.2757E-02 -1.6135E-02 3.4818E-03 -4.1264E-04 2.4189E-05 -4.2765E-07 -9.8364E-09
S13 7.9011E-03 -1.0605E-01 8.3359E-02 -3.0286E-02 6.3613E-03 -8.1765E-04 6.3651E-05 -2.7646E-06 5.1558E-08
S14 -9.1321E-02 9.8710E-03 4.1182E-03 -1.9765E-03 3.6355E-04 -3.4089E-05 1.4975E-06 -1.3088E-08 -6.9442E-10
TABLE 6
Fig. 6A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 3, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 6B shows an astigmatism curve of the imaging lens group of embodiment 3, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the image pickup lens group of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 3, which represents a deviation of different image heights on an imaging plane after light passes through a 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 includes, in order from an object side to an image side, a stop STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, an optical filter E8 and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.08mm, the total length TTL of the imaging lens group is 5.58mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 89.1 °.
Table 7 shows a basic parameter table of the image pickup lens group of example 4, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 7
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 4, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 8B shows an astigmatism curve of the imaging lens group of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the image pickup lens group of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 4, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 8A to 8D, the imaging lens group provided in 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 includes, in order from an object side to an image side, a stop STO, 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, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.33mm, the total length TTL of the imaging lens group is 5.70mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 85.7 °.
Table 9 shows a basic parameter table of the image pickup lens group of example 5, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 9
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -6.2595E-03 1.8733E-02 -4.9808E-02 7.1912E-02 -6.4376E-02 3.5450E-02 -1.1677E-02 2.0592E-03 -1.4760E-04
S2 -2.4232E-02 -9.3257E-02 1.8748E-01 -1.9402E-01 1.4137E-01 -7.9779E-02 3.2510E-02 -8.0215E-03 8.6152E-04
S3 -3.1376E-03 -8.9548E-02 2.0999E-01 -2.8821E-01 3.0199E-01 -2.2921E-01 1.1107E-01 -2.9635E-02 3.2736E-03
S4 1.2362E-02 -1.3048E-02 1.1511E-03 1.0637E-01 -3.0206E-01 3.9104E-01 -2.7510E-01 1.0194E-01 -1.5405E-02
S5 -4.5173E-02 -2.2351E-02 1.0484E-01 -3.1474E-01 5.1554E-01 -4.9653E-01 2.7920E-01 -8.2802E-02 9.9304E-03
S6 -4.2378E-02 -3.5014E-02 1.2554E-01 -2.7130E-01 3.4302E-01 -2.5567E-01 1.0939E-01 -2.2931E-02 1.5447E-03
S7 -3.1213E-02 8.3678E-02 -3.1439E-01 6.8353E-01 -9.5721E-01 8.4898E-01 -4.6135E-01 1.3917E-01 -1.7668E-02
S8 -5.0880E-02 3.8603E-02 -8.8313E-02 1.4057E-01 -1.5521E-01 1.0811E-01 -4.5318E-02 1.0373E-02 -9.8619E-04
S9 -9.1337E-02 7.3315E-02 -6.8779E-02 4.8213E-02 -2.5099E-02 9.1144E-03 -2.2823E-03 3.5346E-04 -2.4277E-05
S10 -6.5753E-02 5.9008E-02 -5.0575E-02 2.7869E-02 -9.8528E-03 2.2184E-03 -3.0912E-04 2.4460E-05 -8.4316E-07
S11 -2.4826E-02 2.3472E-02 -2.4723E-02 1.3655E-02 -5.3762E-03 1.3897E-03 -2.1538E-04 1.8347E-05 -6.7153E-07
S12 1.1157E-01 -7.5044E-02 3.7705E-02 -1.1467E-02 1.6368E-03 -8.2146E-06 -2.6668E-05 3.0040E-06 -1.0612E-07
S13 -4.8630E-03 -8.4274E-02 6.7897E-02 -2.4302E-02 4.9914E-03 -6.2699E-04 4.7776E-05 -2.0350E-06 3.7269E-08
S14 -1.0563E-01 2.4545E-02 -4.2770E-03 8.2573E-04 -2.1728E-04 4.1646E-05 -4.5621E-06 2.5904E-07 -5.9451E-09
Table 10
Fig. 10A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 5, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 10B shows an astigmatism curve of the imaging lens group of embodiment 5, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the image pickup lens group of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 5, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 10A to 10D, the imaging lens group provided in 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 includes, in order from an object side to an image side, a stop STO, 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, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.19mm, the total length TTL of the imaging lens group is 5.58mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 87.6 °.
Table 11 shows a basic parameter table of the image pickup lens group of example 6, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 11
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -6.6254E-03 2.7501E-02 -7.8983E-02 1.2534E-01 -1.2243E-01 7.3382E-02 -2.6252E-02 5.0579E-03 -4.0048E-04
S2 -3.0109E-02 -1.2650E-01 2.9642E-01 -4.1194E-01 4.4259E-01 -3.4469E-01 1.7041E-01 -4.6534E-02 5.2975E-03
S3 -1.5853E-02 -1.0431E-01 2.9134E-01 -4.7001E-01 5.6989E-01 -4.7654E-01 2.4443E-01 -6.7731E-02 7.7161E-03
S4 5.8770E-04 -1.1129E-02 5.2126E-02 -3.8256E-02 -8.7201E-02 2.0294E-01 -1.8158E-01 7.8382E-02 -1.3189E-02
S5 -4.0475E-02 -1.5592E-02 6.1015E-02 -2.4087E-01 4.6185E-01 -4.9179E-01 2.9684E-01 -9.2911E-02 1.1659E-02
S6 -3.4756E-02 -6.5954E-02 2.2324E-01 -5.2569E-01 7.6558E-01 -6.8197E-01 3.6466E-01 -1.0640E-01 1.3010E-02
S7 -1.9709E-02 3.5723E-02 -1.9544E-01 4.8396E-01 -7.3911E-01 6.9211E-01 -3.8819E-01 1.1837E-01 -1.4891E-02
S8 -4.6082E-02 4.4871E-02 -1.3651E-01 2.3407E-01 -2.5065E-01 1.6458E-01 -6.4704E-02 1.3901E-02 -1.2462E-03
S9 -9.8865E-02 8.8854E-02 -9.5382E-02 7.4253E-02 -4.0501E-02 1.4826E-02 -3.5134E-03 4.8460E-04 -2.8978E-05
S10 -6.6890E-02 7.0519E-02 -6.2194E-02 3.3221E-02 -1.1084E-02 2.3367E-03 -3.0489E-04 2.2636E-05 -7.3373E-07
S11 -4.2424E-02 4.4979E-02 -3.1672E-02 1.2554E-02 -3.5189E-03 6.8976E-04 -8.7273E-05 6.4754E-06 -2.1878E-07
S12 8.8960E-02 -5.7605E-02 3.1004E-02 -9.8516E-03 1.4552E-03 -2.6919E-05 -1.8497E-05 2.1227E-06 -7.3592E-08
S13 -7.4523E-03 -7.6880E-02 6.1200E-02 -2.1454E-02 4.3101E-03 -5.2961E-04 3.9505E-05 -1.6491E-06 2.9642E-08
S14 -9.4545E-02 1.8578E-02 -2.0454E-03 2.3904E-04 -1.0121E-04 2.5378E-05 -3.0974E-06 1.8412E-07 -4.2980E-09
Table 12
Fig. 12A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 6, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 12B shows an astigmatism curve of the imaging lens group of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the image pickup lens group of embodiment 6, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 12A to 12D, the image pickup lens group given in 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 includes, in order from an object side to an image side, a stop STO, 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, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.34mm, the total length TTL of the imaging lens group is 5.73mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 85.5 °.
Table 13 shows a basic parameter table of the image pickup lens group of example 7, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 13
TABLE 14
Fig. 14A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 7, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 14B shows an astigmatism curve of the imaging lens group of embodiment 7, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the image pickup lens group of embodiment 7, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 14A to 14D, the image pickup lens group provided in 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 includes, in order from an object side to an image side, a stop STO, 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, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.19mm, the total length TTL of the imaging lens group is 5.58mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 87.6 °.
Table 15 shows a basic parameter table of the image pickup lens group of example 8, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 8, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 15
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.1526E-03 2.8306E-02 -8.8918E-02 1.5384E-01 -1.6250E-01 1.0504E-01 -4.0552E-02 8.5171E-03 -7.4779E-04
S2 -4.1989E-02 -6.0345E-02 2.1266E-01 -3.6247E-01 3.9123E-01 -2.6553E-01 1.0890E-01 -2.4673E-02 2.3708E-03
S3 -2.8661E-02 -4.4965E-02 2.4729E-01 -5.3437E-01 6.8430E-01 -5.3185E-01 2.4497E-01 -6.1201E-02 6.3700E-03
S4 -2.6742E-04 -1.3643E-02 1.4787E-01 -3.7745E-01 4.7140E-01 -3.2058E-01 1.0830E-01 -1.0462E-02 -1.5638E-03
S5 -5.1935E-02 -6.6007E-03 9.6499E-02 -3.1565E-01 4.9830E-01 -4.6108E-01 2.5256E-01 -7.3518E-02 8.6571E-03
S6 -5.6291E-02 2.9745E-02 -8.6064E-02 2.0066E-01 -3.2868E-01 3.3499E-01 -2.0012E-01 6.5681E-02 -9.1265E-03
S7 -5.1695E-02 1.7475E-01 -5.3702E-01 1.0398E+00 -1.3137E+00 1.0615E+00 -5.2845E-01 1.4696E-01 -1.7338E-02
S8 -9.0880E-02 1.6407E-01 -3.4956E-01 4.9945E-01 -4.7976E-01 2.9803E-01 -1.1441E-01 2.4527E-02 -2.2270E-03
S9 -1.0195E-01 1.0164E-01 -9.7990E-02 6.5003E-02 -2.9472E-02 8.8743E-03 -1.8802E-03 2.7250E-04 -1.9129E-05
S10 -1.3690E-01 1.1615E-01 -9.1876E-02 5.0602E-02 -1.8341E-02 4.2463E-03 -6.0318E-04 4.7895E-05 -1.6277E-06
S11 -2.6819E-02 2.5057E-02 -2.5296E-02 1.3914E-02 -5.3773E-03 1.3448E-03 -1.9951E-04 1.6097E-05 -5.5349E-07
S12 1.0903E-01 -7.2657E-02 3.7327E-02 -1.1736E-02 1.7998E-03 -4.8504E-05 -2.1572E-05 2.6916E-06 -9.9163E-08
S13 -4.6862E-03 -8.3239E-02 6.6669E-02 -2.3786E-02 4.8808E-03 -6.1405E-04 4.6974E-05 -2.0131E-06 3.7160E-08
S14 -1.0038E-01 2.1341E-02 -2.9520E-03 4.5549E-04 -1.4721E-04 3.2998E-05 -3.9096E-06 2.3188E-07 -5.4647E-09
Table 16
Fig. 16A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 8, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 16B shows an astigmatism curve of the imaging lens group of embodiment 8, which indicates meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the image pickup lens group of embodiment 8, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 16A to 16D, the image pickup lens group given in 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 capturing lens assembly includes, in order from an object side to an image side, a stop STO, 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, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.19mm, the total length TTL of the imaging lens group is 5.57mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 87.5 °.
Table 17 shows a basic parameter table of the image pickup lens group of example 9, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 18 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 9, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 17
TABLE 18
Fig. 18A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 9, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 18B shows an astigmatism curve of the imaging lens group of embodiment 9, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 18C shows a distortion curve of the imaging lens group of embodiment 9, which represents distortion magnitude values corresponding to different image heights. Fig. 18D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 9, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 18A to 18D, the image pickup lens group given in 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 capturing lens assembly includes, in order from an object side to an image side, a stop STO, 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, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.30mm, the total length TTL of the imaging lens group is 5.66mm, the half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 86.1 °.
Table 19 shows a basic parameter table of the image pickup lens group of embodiment 10, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 20 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 10, where each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 19
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.4582E-03 2.5011E-02 -6.5909E-02 9.5906E-02 -8.5954E-02 4.7282E-02 -1.5528E-02 2.7392E-03 -1.9746E-04
S2 -3.9564E-02 -6.1046E-02 1.7396E-01 -2.4253E-01 2.3204E-01 -1.5259E-01 6.4031E-02 -1.5205E-02 1.5395E-03
S3 -2.1951E-02 -4.9888E-02 1.9080E-01 -3.4216E-01 4.0521E-01 -3.1078E-01 1.4526E-01 -3.7084E-02 3.9383E-03
S4 2.0626E-03 1.5188E-02 -3.7702E-02 1.3225E-01 -3.1052E-01 3.9515E-01 -2.7929E-01 1.0398E-01 -1.5750E-02
S5 -4.8007E-02 -1.9699E-02 1.1836E-01 -3.3692E-01 5.0281E-01 -4.4562E-01 2.3519E-01 -6.6257E-02 7.5597E-03
S6 -5.2138E-02 1.3498E-02 -3.2739E-02 7.3742E-02 -1.3860E-01 1.6151E-01 -1.0641E-01 3.8042E-02 -5.6914E-03
S7 -4.9987E-02 1.2515E-01 -3.8620E-01 7.7736E-01 -1.0443E+00 9.0250E-01 -4.8116E-01 1.4297E-01 -1.7935E-02
S8 -8.5760E-02 1.1427E-01 -2.2842E-01 3.1850E-01 -3.0402E-01 1.8841E-01 -7.2129E-02 1.5396E-02 -1.3890E-03
S9 -7.8887E-02 6.3361E-02 -6.8745E-02 5.3191E-02 -2.9044E-02 1.0730E-02 -2.6658E-03 4.0308E-04 -2.6977E-05
S10 -3.6390E-02 2.5475E-02 -3.0046E-02 2.0828E-02 -8.5837E-03 2.1449E-03 -3.2121E-04 2.6689E-05 -9.4907E-07
S11 -1.0860E-02 2.3150E-02 -4.1604E-02 3.0252E-02 -1.3121E-02 3.4444E-03 -5.3157E-04 4.4596E-05 -1.5796E-06
S12 1.0162E-01 -5.4539E-02 1.7528E-02 -8.8348E-04 -1.5582E-03 5.6674E-04 -8.7729E-05 6.5426E-06 -1.9252E-07
S13 -4.7812E-03 -8.3819E-02 6.7454E-02 -2.4144E-02 4.9629E-03 -6.2435E-04 4.7667E-05 -2.0347E-06 3.7342E-08
S14 -1.0408E-01 2.2326E-02 -2.9640E-03 3.3825E-04 -9.9899E-05 2.4336E-05 -3.0763E-06 1.9105E-07 -4.6620E-09
Table 20
Fig. 20A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 10, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 20B shows an astigmatism curve of the imaging lens group of embodiment 10, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 20C shows a distortion curve of the image pickup lens group of embodiment 10, which represents distortion magnitude values corresponding to different image heights. Fig. 20D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 10, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 20A to 20D, the image pickup 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 capturing lens assembly includes, in order from an object side to an image side, a stop STO, 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, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is concave and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.19mm, the total length TTL of the imaging lens group is 5.58mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 87.7 °.
Table 21 shows a basic parameter table of the image pickup lens group of example 11, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 22 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 11, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Table 21
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.9196E-03 2.8780E-02 -7.0400E-02 9.2461E-02 -7.0476E-02 2.9190E-02 -5.1765E-03 -2.3072E-04 1.4234E-04
S2 -3.2849E-02 -1.3583E-01 3.0811E-01 -4.6873E-01 5.6257E-01 -4.6187E-01 2.3064E-01 -6.2534E-02 7.0400E-03
S3 -1.3665E-02 -1.1432E-01 2.9890E-01 -5.2414E-01 7.0428E-01 -6.2130E-01 3.2479E-01 -9.0470E-02 1.0323E-02
S4 1.0736E-02 -1.3028E-02 1.5408E-02 9.7346E-02 -3.4510E-01 4.9234E-01 -3.7365E-01 1.4769E-01 -2.3586E-02
S5 -3.9840E-02 1.0542E-02 -2.1993E-02 -5.9819E-02 1.9750E-01 -2.4639E-01 1.5675E-01 -4.7831E-02 5.4059E-03
S6 -5.1705E-02 -4.4025E-02 2.1788E-01 -5.7661E-01 8.9067E-01 -8.3213E-01 4.6486E-01 -1.4170E-01 1.8094E-02
S7 -2.7930E-02 9.0425E-02 -3.5401E-01 8.0757E-01 -1.1645E+00 1.0496E+00 -5.7358E-01 1.7240E-01 -2.1661E-02
S8 -3.8020E-02 3.1087E-02 -1.5280E-01 3.0541E-01 -3.3983E-01 2.2225E-01 -8.5393E-02 1.7783E-02 -1.5430E-03
S9 -1.1677E-02 -4.4258E-02 2.7373E-02 -4.9902E-03 -5.5321E-03 5.0490E-03 -2.0434E-03 4.1235E-04 -3.2396E-05
S10 5.4699E-02 -7.6364E-02 3.5052E-02 -8.3857E-03 8.9220E-04 3.4942E-05 -2.3849E-05 3.1287E-06 -1.5369E-07
S11 6.8309E-02 -4.2659E-02 2.9140E-03 5.1741E-03 -2.2618E-03 3.3499E-04 -1.0130E-06 -3.9479E-06 2.5480E-07
S12 8.1144E-02 -2.4122E-02 -1.1286E-02 1.6333E-02 -7.6149E-03 1.8269E-03 -2.4081E-04 1.6598E-05 -4.6890E-07
S13 -1.2659E-02 -6.8499E-02 5.4628E-02 -1.8762E-02 3.6694E-03 -4.3732E-04 3.1557E-05 -1.2717E-06 2.2029E-08
S14 -9.8531E-02 1.9139E-02 -6.4722E-04 -6.3641E-04 1.3840E-04 -1.0685E-05 5.8707E-09 4.0400E-08 -1.5090E-09
Table 22
Fig. 22A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 11, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 22B shows an astigmatism curve of the imaging lens group of embodiment 11, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 22C shows a distortion curve of the imaging lens group of embodiment 11, which represents distortion magnitude values corresponding to different image heights. Fig. 22D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 11, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 22A to 22D, the image pickup lens group given in 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 capturing lens assembly includes, in order from an object side to an image side, a stop STO, 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, an optical filter E8, and an imaging surface S17.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is concave and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the imaging lens group is 4.31mm, the total length TTL of the imaging lens group is 5.26mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 of the imaging lens group is 4.12mm, and the maximum field angle FOV of the imaging lens group is 85.9 °.
Table 23 shows a basic parameter table of the image pickup lens group of example 12, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 24 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 12, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
Table 23
Table 24
Fig. 24A shows an on-axis chromatic aberration curve of the image-pickup lens group of embodiment 12, which indicates a convergent focus deviation after light rays of different wavelengths pass through the lens. Fig. 24B shows an astigmatism curve of the imaging lens group of embodiment 12, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 24C shows a distortion curve of the imaging lens group of embodiment 12, which represents distortion magnitude values corresponding to different image heights. Fig. 24D shows a magnification chromatic aberration curve of the image pickup lens group of embodiment 12, which represents a deviation of different image heights on an imaging plane after light passes through a lens. As can be seen from fig. 24A to 24D, the image pickup lens group provided in embodiment 12 can achieve good imaging quality.
In summary, examples 1 to 12 each satisfy the relationship shown in table 25.
Table 25
The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the above-described image pickup lens group.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (17)

1. The imaging lens assembly includes, in order from an object side to an image side along an optical axis:
the first lens with positive focal power has a convex object side surface and a concave image side surface;
a second lens with optical power, the object side surface of which is a convex surface;
a third lens having optical power, an image side surface of which is a concave surface;
A fourth lens having optical power;
a fifth lens having optical power;
a sixth lens element with optical power, the image-side surface of which is convex;
A seventh lens with negative focal power, wherein the object side surface is a concave surface and the image side surface is a concave surface,
The fourth lens and the sixth lens have positive optical power, the fifth lens has negative optical power, at most one of the second lens and the third lens has positive optical power, or the second lens has negative optical power, the fifth lens and the sixth lens have positive optical power, the positive and negative attributes of the optical power of the third lens and the fourth lens are opposite, or the second lens, the fourth lens and the fifth lens have positive optical power, the third lens has negative optical power;
the number of lenses of the image pickup lens group with focal power is seven;
The F number FNO of the image pickup lens group, the distance TTL from the object side surface of the first lens to the imaging surface of the image pickup lens group on the optical axis and half of the diagonal length of an effective pixel area on the imaging surface of the image pickup lens group are satisfied that FNO×TTL/ImgH is less than or equal to 2.07;
The central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis meet the conditions that 1.4< CT1/(CT2+CT3) is less than or equal to 1.69;
The interval distance T23 between the second lens and the third lens on the optical axis and the interval distance T34 between the third lens and the fourth lens on the optical axis are 0.5< T23/T34 is less than or equal to 1.42.
2. The imaging lens system according to claim 1, wherein an effective focal length f1 of the first lens and a total effective focal length f of the imaging lens system satisfy 1.2≤f1/f≤1.70.
3. The imaging lens system 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-2.63≤f1/f7≤1.96.
4. The imaging lens system according to claim 1, wherein a radius of curvature R14 of an image side surface of the seventh lens and a total effective focal length f of the imaging lens system satisfy 0.5< R14/f≤0.57.
5. The imaging lens system according to claim 1, wherein a radius of curvature R12 of an image side surface of the sixth lens and a radius of curvature R13 of an object side surface of the seventh lens satisfy 0.61≤R12/R13≤0.88.
6. The imaging lens set according to claim 1, wherein a combined focal length f1234 of the first lens, the second lens, the third lens, and the fourth lens and a total effective focal length f of the imaging lens set satisfy 1< f1234/f <1.7.
7. The imaging lens system according to claim 1, wherein a distance SAG71 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 and a center thickness CT7 of the seventh lens on the optical axis satisfy-4.40≤SAG 71/CT 7≤2.28.
8. The imaging lens system according to claim 1, wherein a distance SAG32 between an intersection point of an image side surface of the third lens and the optical axis and an effective radius vertex of the image side surface of the third lens on the optical axis and a distance SAG41 between an intersection point of an object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the fourth lens on the optical axis satisfy that SAG32/SAG41 is not less than 12.29 and not more than 0.33.
9. The imaging lens system according to claim 1, wherein an effective half-diameter DT11 of an object side surface of the first lens and an effective half-diameter DT72 of an image side surface of the seventh lens satisfy 0.40+.dt11/DT 72<0.5.
10. The imaging lens system according to claim 1, wherein an effective half diameter DT12 of an image side surface of the first lens and an effective half diameter DT51 of an object side surface of the fifth lens satisfy 0.69≤dt12/DT 51≤0.81.
11. The imaging lens system according to claim 1, wherein a distance SAG52 between an intersection point of an image side surface of the fifth lens and the optical axis and an effective radius vertex of the image side surface of the fifth lens on the optical axis and a distance SAG61 between an intersection point of an object side surface of the sixth lens and the optical axis and an effective radius vertex of the object side surface of the sixth lens on the optical axis satisfy 0.3< SAG52/SAG61 being equal to or less than 1.04.
12. The imaging lens system according to claim 1, wherein an effective half-diameter DT42 of an image side surface of the fourth lens element and an effective half-diameter DT51 of an object side surface of the fifth lens element satisfy 0.76-0.87.
13. The imaging lens system according to claim 1, wherein a separation distance T45 between the fourth lens element and the fifth lens element on the optical axis and a separation distance T56 between the fifth lens element and the sixth lens element on the optical axis satisfy 2.09T 45/T56 4.46.
14. The image pickup lens group according to any one of claims 1 to 13, wherein the second lens is made of a glass material, and a refractive index of the second lens is not smaller than a refractive index of any other lens in the image pickup lens group.
15. The imaging lens group according to any one of claims 1 to 13, wherein a total effective focal length f of the imaging lens group and an entrance pupil diameter EPD of the imaging lens group satisfy 1.48 +.f/EPD +.1.49.
16. The imaging lens group according to any one of claims 1 to 13, wherein a maximum field angle FOV of the imaging lens group satisfies 12.82+.tan (FOV) + 66.92.
17. The imaging lens group according to any one of claims 1 to 13, wherein an F-number Fno of the imaging lens group, a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the imaging lens group, and a half ImgH of a diagonal length of an effective pixel region on the imaging surface of the imaging lens group satisfy 1.90+.fno×ttl/imgh+.2.07.
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