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CN110618522A - Image pickup lens group - Google Patents

Image pickup lens group Download PDF

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Publication number
CN110618522A
CN110618522A CN201911038319.2A CN201911038319A CN110618522A CN 110618522 A CN110618522 A CN 110618522A CN 201911038319 A CN201911038319 A CN 201911038319A CN 110618522 A CN110618522 A CN 110618522A
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CN
China
Prior art keywords
lens
lens group
image
imaging
image pickup
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Pending
Application number
CN201911038319.2A
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Chinese (zh)
Inventor
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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Priority to CN201911038319.2A priority Critical patent/CN110618522A/en
Publication of CN110618522A publication Critical patent/CN110618522A/en
Pending legal-status Critical Current

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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

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

Description

Image pickup lens group
Technical Field
The present application relates to the field of optical elements, and in particular, to an imaging lens group.
Background
In recent years, with the development of imaging technology for portable electronic products such as mobile phones, lenses for portable electronic products such as mobile phones having high imaging quality have been favored. However, the overall length of the camera lens is limited due to the reduction of the thickness of portable electronic products such as mobile phones, so that the design difficulty of the camera lens of the portable electronic products such as mobile phones is increased.
Meanwhile, with the improvement of performance and reduction of pixel size of a photosensitive element photosensitive coupling element (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) element commonly used for a camera lens of a portable electronic product such as a mobile phone, a corresponding camera lens group is required to have higher luminous flux.
How to realize the miniaturization and increase the camera lens group of the light inlet quantity, make the camera lens group can image the scenery clearly, is one of the problems to be solved urgently in the field of lens design.
Disclosure of Invention
An aspect of the present application provides an image capturing lens assembly, comprising, in order from an object side to an image side along an optical axis: a first lens having a positive refractive power, an object-side surface of which is convex; a second lens having an optical power; a third lens having a refractive power, an image-side surface of which is concave; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having a refractive power, an image-side surface of which is convex; and the image side surface of the seventh lens with negative focal power is a concave surface.
In one embodiment, the total effective focal length f of the image capturing lens group and the entrance pupil diameter EPD of the image capturing lens group may satisfy: f/EPD < 1.6.
In one embodiment, the maximum field angle FOV of the image pickup lens group may satisfy: tan (FOV) > 12.
In one embodiment, the F-number Fno of the image pickup lens group, the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the image pickup lens group, and half the diagonal length ImgH of the effective pixel area on the imaging surface of the image pickup lens group may satisfy: fno × TTL/imgH < 2.2 mm.
In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the image capture lens group may satisfy: f1/f is more than or equal to 1.2 and less than 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 surface of the seventh lens and the total effective focal length f of the image capture lens group may satisfy: r14/f is more than 0.5 and less than 1.
In one embodiment, the radius of curvature R12 of the image-side surface of the sixth lens and the radius of curvature R13 of the object-side surface 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 image capture lens group may satisfy: 1 < f1234/f < 1.7.
In one embodiment, the separation distance T23 between the second lens and the third lens on the optical axis and the separation distance T34 between the third lens and the fourth lens on the optical axis may satisfy: 0.5 < T23/T34 < 1.5.
In one embodiment, 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 may satisfy: 1.4 < CT1/(CT2+ CT3) < 2.
In one embodiment, the distance SAG71 from the intersection point of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: -4.5 < SAG71/CT7 < -2.
In one embodiment, a distance SAG32 from an intersection point of an image side surface of the third lens and the optical axis to an effective radius vertex of the image side surface of the third lens on the optical axis and a distance SAG41 from an intersection point of an object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens on the optical axis may satisfy: SAG32/SAG41 < 0.
In one embodiment, the effective half aperture DT11 of the object side surface of the first lens and the effective half aperture DT72 of the image side surface of the seventh lens satisfy: 0.3 < DT11/DT72 < 0.5.
In one embodiment, the effective half aperture DT12 of the image-side surface of the first lens and the effective half aperture DT51 of the object-side surface of the fifth lens satisfy: 0.5 < DT12/DT51 < 1.
In one embodiment, a distance SAG52 on the optical axis from the intersection point of the image-side surface of the fifth lens and the optical axis to the effective radius vertex of the image-side surface of the fifth lens to a distance SAG61 on the optical axis from the intersection point of the object-side surface of the sixth lens and the optical axis to the effective radius vertex of the object-side surface of the sixth lens may satisfy: 0.3 < SAG52/SAG61 < 1.1.
In one embodiment, the effective half aperture DT42 of the image-side surface of the fourth lens and the effective half aperture DT51 of the object-side surface of the fifth lens satisfy: 0.5 < DT42/DT51 < 1.
In one embodiment, a separation distance T45 between the fourth lens and the fifth lens on the optical axis and a separation distance T56 between the fifth lens and the sixth lens on the optical axis may 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 a refractive index of the second lens is not less than a refractive index of any other lens in the image pickup lens group.
The present application employs a plurality of (e.g., seven) lenses, and the optical imaging lens assembly has at least one advantageous effect of miniaturization, ultra-thinness, large aperture, large image plane, and high imaging quality by reasonably distributing the focal power, surface shape, center thickness of each lens, and on-axis distance between each lens.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 shows a schematic configuration diagram of an image pickup lens group according to embodiment 1 of the present application;
fig. 2A to 2D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens group of example 1;
fig. 3 shows a schematic configuration diagram of an image pickup lens group according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 2;
fig. 5 shows a schematic configuration diagram of an image pickup lens group according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of embodiment 3;
fig. 7 shows a schematic configuration diagram of an image pickup lens group according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 4;
fig. 9 shows a schematic configuration diagram of an image pickup lens group according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 5;
fig. 11 shows a schematic configuration diagram of an image pickup lens group according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 6;
fig. 13 is a schematic view showing a configuration of an image pickup lens group according to embodiment 7 of the present application;
fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 7;
fig. 15 shows a schematic configuration diagram of an image pickup lens group according to embodiment 8 of the present application;
fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 8;
fig. 17 shows a schematic configuration diagram of an image pickup lens group according to embodiment 9 of the present application;
fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of an imaging lens group of example 9;
fig. 19 shows a schematic configuration diagram of an image pickup lens group according to embodiment 10 of the present application;
fig. 20A to 20D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 10;
fig. 21 is a schematic view showing a configuration of an image pickup lens group according to embodiment 11 of the present application;
fig. 22A to 22D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 11;
fig. 23 is a schematic view showing a configuration of an image pickup lens group according to embodiment 12 of the present application;
fig. 24A to 24D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the imaging lens group of example 12.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
An image pickup lens group according to an exemplary embodiment of the present application may include 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 along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the seventh lens may have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have a positive optical power, and the object-side surface thereof may be convex; the second lens has positive focal power or negative focal power; the third lens has positive focal power or negative focal power, and the image side surface of the third lens can be a concave surface; the fourth lens has positive focal power or negative focal power; the fifth lens has positive focal power or negative focal power; the sixth lens has positive focal power or negative focal power, and the image side surface of the sixth lens can be a convex surface; the seventh lens element may have a negative power and its image-side surface may be concave.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: f/EPD < 1.6, wherein f is the total effective focal length of the image pickup lens group, and EPD is the entrance pupil diameter of the image pickup lens group. 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, an image pickup lens group according to the present application may satisfy: tan (FOV) > 12, where FOV is the maximum field angle of the image capture lens group. Tan (FOV) is more than 12, so that the camera lens group has a sufficiently large field angle and is compatible with a sufficiently large field range, and the camera efficiency is improved.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: fno x TTL/ImgH < 2.2mm, wherein Fno is the F number of the image pickup lens group, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the image pickup lens group, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the image pickup lens group. Satisfy Fno x TTL/imgH and < 2.2mm for the camera lens group has both controlled the size of camera lens group effectively under the prerequisite that has big light ring, has guaranteed the ultra-thin characteristic of camera lens group, can compatible super large-size photosurface again, has promoted imaging efficiency greatly.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: f1/f is more than or equal to 1.2 and less than 2, wherein f1 is the effective focal length of the first lens, and f is the total effective focal length of the shooting lens group. More specifically, f1 and f further satisfy: f1/f is more than or equal to 1.2 and less than 1.8. Satisfying f1/f < 2 > of 1.2 ≤ and reasonably controlling the negative astigmatism of the first lens to cancel the positive astigmatism of the rear lens, so that the image pickup lens group has good image quality.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: -3 < f1/f7 < -1.9, wherein f1 is the effective focal length of the first lens and f7 is the effective focal length of the seventh lens. More specifically, f1 and f7 may further satisfy: -2.8 < f1/f7 < -1.9. Satisfy-3 < f1/f7 < -1.9, can reduce the deflection angle of light, improve the imaging quality of the camera lens group.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.5 < R14/f < 1, wherein R14 is the curvature radius of the image side surface of the seventh lens, and f is the total effective focal length of the image pickup lens group. More specifically, R14 and f further satisfy: r14/f is more than 0.5 and less than 0.7. The requirement that R14/f is more than 0.5 and less than 1 is satisfied, which is beneficial to forming and demoulding the seventh lens.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.5 < R12/R13 < 1, wherein 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. The structure of the sixth lens and the structure of the seventh lens can be effectively controlled to meet the requirement that R12/R13 is more than 0.5 and less than 1, and the molding and demolding of the sixth lens and the seventh lens are facilitated.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 1 < f1234/f < 1.7, where f1234 is the combined focal length of the first, second, third, and fourth lenses, and f is the total effective focal length of the image capture lens group. Satisfying 1 < f1234/f < 1.7, can obtain reasonable negative astigmatism, offset the positive astigmatism of the rear lens, make the lens group of making a video recording obtain good imaging quality.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.5 < T23/T34 < 1.5, wherein T23 is a distance separating the second lens and the third lens on the optical axis, and T34 is a distance separating the third lens and the fourth lens on the optical axis. The lens group has the advantages that T23/T34 is more than 0.5 and less than 1.5, the balance of curvature of field of the photographing lens group can be effectively controlled, the photographing lens group has reasonable curvature of field, the distance between the second lens and the fourth lens can be controlled to be uniform and reasonable, and the reliability of the photographing lens group is enhanced.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 1.4 < CT1/(CT2+ CT3) < 2, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis. More specifically, it is further possible to satisfy: 1.4 < CT1/(CT2+ CT3) < 1.8. The requirements of 1.4 < CT1/(CT2+ CT3) < 2 are met, the field curvature balance of the camera lens group can be effectively controlled, the camera lens group has reasonable field curvature, the structure of the first lens can be controlled to be uniform and reasonable, and the first lens is beneficial to molding of the first lens.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 4.5 < SAG71/CT7 < -2, wherein SAG71 is a distance on the optical axis from an intersection point of the object-side surface of the seventh lens and the optical axis to a vertex of an effective radius of the object-side surface of the seventh lens, and CT7 is a central thickness of the seventh lens on the optical axis. The requirements of-4.5 < SAG71/CT7 < -2 are met, the weak thickness ratio of the seventh lens can be effectively restrained, the structural sensitivity of the seventh lens is reduced, and the seventh lens is convenient to mold and demold.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: SAG32/SAG41 < 0, wherein SAG32 is a distance between an intersection point of an image side surface of the third lens and an optical axis and an effective radius vertex of the image side surface of the third lens on the optical axis, and SAG41 is a distance 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. Satisfying SAG32/SAG41 < 0, the structural ratio of weakness and thickness of the third lens and the fourth lens can be reasonably controlled, and the molding and demolding of the third lens and the fourth lens are facilitated.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.3 < DT11/DT72 < 0.5, wherein DT11 is the effective half aperture of the object side surface of the first lens and DT72 is the effective half aperture of the image side surface of the seventh lens. The structure section difference from the first lens to the seventh lens can be effectively controlled, and the lens assembly is facilitated, wherein DT11/DT72 is more than 0.3 and less than 0.5.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.5 < DT12/DT51 < 1, wherein DT12 is the effective half aperture of the image side surface of the first lens, and DT51 is the effective half aperture of the object side surface of the fifth lens. More specifically, DT12 and DT51 further satisfy: 0.6 < DT12/DT51 < 0.9. Satisfies the following conditions: DT12/DT51 of 0.5 < 1 can effectively control the structural segment difference between the first lens and the fifth lens, which is beneficial to the assembly of the lenses.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.3 < SAG52/SAG61 < 1.1, wherein SAG52 is a distance 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 SAG61 is a distance between an intersection point of an object side surface of the sixth lens and the optical axis and an effective radius vertex of the object side surface of the sixth lens on the optical axis. The structural weakness and thickness ratio of the fifth lens and the sixth lens can be reasonably controlled to facilitate the forming and demoulding of the fifth lens and the sixth lens when the condition that 0.3 < SAG52/SAG61 < 1.1 is met.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.5 < DT42/DT51 < 1, wherein DT42 is the effective half aperture of the image side surface of the fourth lens, and DT51 is the effective half aperture of the object side surface of the fifth lens. More specifically, DT42 and DT51 further satisfy: 0.6 < DT42/DT51 < 1. The structure section difference from the fourth lens to the fifth lens can be effectively controlled to be beneficial to lens assembly when DT42/DT51 is more than 0.5 and less than 1.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 2 < T45/T56 < 5, wherein T45 is the distance between the fourth lens and the fifth lens on the optical axis, and T56 is the distance between the fifth lens and the sixth lens on the optical axis. The requirement of T45/T56 being more than 2 and less than 5 is met, the field curvature balance of the camera lens group can be effectively controlled, and the camera 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. Glass materials can provide a high refractive index that plastic materials cannot provide. The high refractive index is favorable for improving the resolving power of the camera lens group, is favorable for improving the temperature drift of the system focal length generated by the plastic lens and enhances the reliability of the system.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: n2 is more than or equal to Ni, wherein N2 is the refractive index of the second lens, and Ni is the refractive index of the ith (i is 1, 3, 4, 5, 6 and 7) lens. N2 is more than or equal to Ni, so that the resolution of the camera lens group is improved, and the reliability of the camera lens group is enhanced.
The application provides a seven-piece type camera lens group with high imaging quality and an aspheric surface. The image pickup lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between each lens and the like, incident light can be effectively converged, the optical total length of the camera lens group is reduced, the machinability of the camera lens group is improved, and the camera lens group is more favorable for production and processing.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the seventh lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. 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 aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, sixth, and seventh lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the image pickup lens group is not limited to include seven lenses. The imaging lens group may also include other numbers of lenses, if desired.
Specific examples of an image pickup lens group applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An image pickup lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an image pickup lens group according to embodiment 1 of the present application.
As shown in fig. 1, the image capturing lens assembly, in order from an object side to an image side, comprises: 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 a basic parameter table of the imaging lens group of embodiment 1, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
In the present 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 ImgH of the diagonal length 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 through the seventh lens E7 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S14 used in example 14、A6、A8、A10、A12、A14、A16、A18And A20。
Flour mark 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 imaging lens group of embodiment 1, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 1. Fig. 2C shows a distortion curve of the imaging lens group of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 1, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 2A to 2D, the image capturing lens assembly according to embodiment 1 can achieve good image quality.
Example 2
An image pickup lens group according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic configuration diagram of an image pickup lens group according to embodiment 2 of the present application.
As shown in fig. 3, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.34mm, the total length TTL of the image pickup lens group is 5.72mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 85.6 °.
Table 3 shows a basic parameter table of the image pickup lens group of embodiment 2, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 3
TABLE 4
Fig. 4A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 2, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 2. Fig. 4C shows a distortion curve of the imaging lens group of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 2, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 4A to 4D, the imaging lens group according to embodiment 2 can achieve good imaging quality.
Example 3
An image pickup lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic configuration diagram of an image pickup lens group according to embodiment 3 of the present application.
As shown in fig. 5, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.08mm, the total length TTL of the image pickup lens group is 5.58mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 89.0 °.
Table 5 shows a basic parameter table of the imaging lens group of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 5
Flour mark 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 imaging lens group of embodiment 3, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 3. Fig. 6C shows a distortion curve of the imaging lens group of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 3, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 6A to 6D, the imaging lens group according to embodiment 3 can achieve good imaging quality.
Example 4
An image pickup lens group according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of an image pickup lens group according to embodiment 4 of the present application.
As shown in fig. 7, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.08mm, the total length TTL of the image pickup lens group is 5.58mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 89.1 °.
Table 7 shows a basic parameter table of the imaging lens group of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 7
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 4, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 4. Fig. 8C shows a distortion curve of the imaging lens group of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 4, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 8A to 8D, the imaging lens group according to embodiment 4 can achieve good imaging quality.
Example 5
An image pickup lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration diagram of an image pickup lens group according to embodiment 5 of the present application.
As shown in fig. 9, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.33mm, the total length TTL of the image pickup lens group is 5.70mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 85.7 °.
Table 9 shows a basic parameter table of the imaging lens group of embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 9
Flour mark 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
Watch 10
Fig. 10A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 5, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 5. Fig. 10C shows a distortion curve of the imaging lens group of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 5, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the imaging lens group according to embodiment 5 can achieve good imaging quality.
Example 6
An image pickup lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic configuration diagram of an image pickup lens group according to embodiment 6 of the present application.
As shown in fig. 11, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.19mm, the total length TTL of the image pickup lens group is 5.58mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 87.6 °.
Table 11 shows a basic parameter table of the imaging lens group of example 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 11
Flour mark 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 imaging lens group of embodiment 6, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 6. Fig. 12C shows a distortion curve of the imaging lens group of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 6, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the imaging lens group according to embodiment 6 can achieve good imaging quality.
Example 7
An image pickup lens group according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic configuration diagram of an image pickup lens group according to embodiment 7 of the present application.
As shown in fig. 13, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.34mm, the total length TTL of the image pickup lens group is 5.73mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 85.5 °.
Table 13 shows a basic parameter table of the imaging lens group of example 7, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Watch 13
TABLE 14
Fig. 14A shows an on-axis chromatic aberration curve of the imaging lens group of example 7, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 7. Fig. 14C shows a distortion curve of the imaging lens group of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 7, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 14A to 14D, the imaging lens group according to embodiment 7 can achieve good imaging quality.
Example 8
An image pickup lens group according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic configuration diagram of an image pickup lens group according to embodiment 8 of the present application.
As shown in fig. 15, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.19mm, the total length TTL of the image pickup lens group is 5.58mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 87.6 °.
Table 15 shows a basic parameter table of the imaging lens group of example 8, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 shows high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Watch 15
Flour mark 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 an imaging lens group of embodiment 8, which represents a convergent focus deviation of light rays of different wavelengths after passing through a lens. Fig. 16B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 8. Fig. 16C shows a distortion curve of the imaging lens group of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 8, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 16A to 16D, the imaging lens group according to embodiment 8 can achieve good imaging quality.
Example 9
An 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, in order from an object side to an image side, comprises: 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.19mm, the total length TTL of the image pickup lens group is 5.57mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 87.5 °.
Table 17 shows a basic parameter table of the imaging lens group of example 9, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 18 shows high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 17
Watch 18
Fig. 18A shows an on-axis chromatic aberration curve of an imaging lens group of example 9, which represents a convergent focus deviation of light rays of different wavelengths after passing through a lens. Fig. 18B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of example 9. Fig. 18C shows a distortion curve of the imaging lens group of example 9, which represents distortion magnitude values corresponding to different image heights. Fig. 18D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 9, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 18A to 18D, the imaging lens group according to embodiment 9 can achieve good imaging quality.
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, in order from an object side to an image side, comprises: 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.30mm, the total length TTL of the image pickup lens group is 5.66mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 86.1 °.
Table 19 shows a basic parameter table of the imaging lens group of example 10, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 20 shows high-order term coefficients that can be used for each aspherical mirror surface in example 10, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Watch 19
Flour mark 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
Watch 20
Fig. 20A shows an on-axis chromatic aberration curve of the imaging lens group of example 10, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 20B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of example 10. Fig. 20C shows a distortion curve of the imaging lens group of embodiment 10, which represents distortion magnitude values corresponding to different image heights. Fig. 20D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 10, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 20A to 20D, the imaging lens group according to embodiment 10 can achieve good imaging quality.
Example 11
An image pickup lens group according to embodiment 11 of the present application is described below with reference to fig. 21 to 22D. Fig. 21 shows a schematic configuration diagram of an image pickup lens group according to embodiment 11 of the present application.
As shown in fig. 21, the image capturing lens assembly, in order from an object side to an image side, comprises: 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.19mm, the total length TTL of the image pickup lens group is 5.58mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 87.7 °.
Table 21 shows a basic parameter table of the imaging lens group of example 11, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 22 shows high-order term coefficients that can be used for each aspherical mirror surface in example 11, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 21
Flour mark 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 an imaging lens group of example 11, which represents a convergent focus deviation of light rays of different wavelengths after passing through a lens. Fig. 22B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the imaging lens group of example 11. Fig. 22C shows a distortion curve of the imaging lens group of example 11, which represents distortion magnitude values corresponding to different image heights. Fig. 22D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 11, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 22A to 22D, the imaging lens group according to embodiment 11 can achieve good imaging quality.
Example 12
An image pickup lens group according to embodiment 12 of the present application is described below with reference to fig. 23 to 24D. Fig. 23 shows a schematic configuration diagram of an image pickup lens group according to embodiment 12 of the present application.
As shown in fig. 23, the image capturing lens assembly, in order from an object side to an image side, comprises: 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, a filter E8, and an image forming surface S17.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The 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 image pickup lens group is 4.31mm, the total length TTL of the image pickup lens group is 5.26mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the image pickup lens group is 4.12mm, and the maximum field angle FOV of the image pickup lens group is 85.9 °.
Table 23 shows a basic parameter table of the imaging lens group of example 12, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 24 shows high-order term coefficients that can be used for each aspherical mirror surface in example 12, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 23
Watch 24
Fig. 24A shows an on-axis chromatic aberration curve of an imaging lens group of example 12, which represents a convergent focus deviation of light rays of different wavelengths after passing through a lens. Fig. 24B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of example 12. Fig. 24C shows a distortion curve of the imaging lens group of example 12, which represents distortion magnitude values corresponding to different image heights. Fig. 24D shows a chromatic aberration of magnification curve of the imaging lens group of example 12, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 24A to 24D, the imaging lens group according to embodiment 12 can achieve good imaging quality.
In summary, examples 1 to 12 each satisfy the relationship shown in table 25.
TABLE 25
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described image pickup lens group.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having a positive refractive power, an object-side surface of which is convex;
a second lens having an optical power;
a third lens having a refractive power, an image-side surface of which is concave;
a fourth lens having an optical power;
a fifth lens having optical power;
a sixth lens having a refractive power, an image-side surface of which is convex;
a seventh lens having a negative refractive power, an image-side surface of which is concave; wherein,
the total effective focal length f of the image pickup lens group and the entrance pupil diameter EPD of the image pickup lens group satisfy: f/EPD is less than 1.6;
the maximum field angle FOV of the image pickup lens group satisfies: tan (FOV) > 12.
2. The imaging lens group according to claim 1, 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 area on the imaging surface of the imaging lens group satisfy: fno × TTL/imgH < 2.2 mm.
3. An image capturing lens group according to claim 1, wherein an effective focal length f1 of the first lens and a total effective focal length f of the image capturing lens group satisfy: f1/f is more than or equal to 1.2 and less than 2.
4. The imaging lens group according to claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f7 of the seventh lens satisfy: -3 < f1/f7 < -1.9.
5. An image capturing lens group 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 image capturing lens group satisfy: r14/f is more than 0.5 and less than 1.
6. The imaging lens group 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: 0.5 < R12/R13 < 1.
7. An image capturing lens group 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 image capturing lens group satisfy: 1 < f1234/f < 1.7.
8. The imaging lens group according to claim 1, wherein a separation distance T23 on the optical axis between the second lens and the third lens and a separation distance T34 on the optical axis between the third lens and the fourth lens satisfy: 0.5 < T23/T34 < 1.5.
9. The imaging lens group according to claim 1, wherein a center thickness CT1 of said first lens on said optical axis, a center thickness CT2 of said second lens on said optical axis, and a center thickness CT3 of said third lens on said optical axis satisfy: 1.4 < CT1/(CT2+ CT3) < 2.
10. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having a positive refractive power, an object-side surface of which is convex;
a second lens having an optical power;
a third lens having a refractive power, an image-side surface of which is concave;
a fourth lens having an optical power;
a fifth lens having optical power;
a sixth lens having a refractive power, an image-side surface of which is convex;
a seventh lens having a negative refractive power, an image-side surface of which is concave; wherein,
the F number Fno of the camera lens group, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis and half ImgH of the diagonal length of the effective pixel area on the imaging surface of the camera lens group satisfy: fno × TTL/imgH < 2.2 mm.
CN201911038319.2A 2019-10-29 2019-10-29 Image pickup lens group Pending CN110618522A (en)

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