CN115202000A - 7G lens - Google Patents

7G lens Download PDF

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Publication number
CN115202000A
CN115202000A CN202210516484.XA CN202210516484A CN115202000A CN 115202000 A CN115202000 A CN 115202000A CN 202210516484 A CN202210516484 A CN 202210516484A CN 115202000 A CN115202000 A CN 115202000A
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lens
space
convex
image
object space
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CN115202000B (en
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张若金
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Hubei Huaxin Photoelectric Co ltd
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Hubei Huaxin Photoelectric 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
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

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

Abstract

The invention relates to the technical field of lenses, in particular to a 7G lens, which comprises a light inlet aperture diaphragm and a first lens, wherein the light inlet aperture diaphragm is used for adjusting incident light beams; the second lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space; the third lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space; the fourth lens is a negative lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space; the fifth lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is concave to the image space; the sixth lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space; the seventh lens, object side surface convex to the object side, image side surface concave to the image side. The lens can quickly shoot a distant scene and obtain a small-distortion picture.

Description

7G lens
Technical Field
The invention relates to the technical field of lenses, in particular to a 7G lens.
Background
In recent years, with the rapid development of the information-oriented high-tech era, lenses are more and more widely applied in various fields, and in some application fields (such as vehicle-mounted, aerial photography, mapping, industry, scientific research, and other various fields), lenses with long focal length, large aperture and small distortion are required to rapidly shoot a distant scene and obtain a photo with small distortion. Accordingly, a 7G lens that can satisfy the above requirements is provided herein.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention discloses a 7G lens which is used for quickly taking a distant scene and obtaining a photo with small distortion.
The invention is realized by the following technical scheme:
the invention provides a 7G lens, which comprises an aperture diaphragm for adjusting the light incoming amount of an incident beam, an
The first lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is convex to the image space;
the second lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the third lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fourth lens is a negative lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fifth lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is concave to the image space;
the sixth lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the seventh lens, object side surface convex to object side, image side surface concave to image side.
Further, the first lens, the second lens, the third lens, the fourth lens, the aperture stop, the fifth lens, the sixth lens and the seventh lens are arranged in sequence from the object side to the image side along the optical axis.
Further, the combined focal length of the second lens and the third lens is f23, and the total focal length of the lens is EFL, which satisfies the following conditions: 0.80< | f23/EFL | <0.86.
Further, if the focal length of the third lens element is f3, the focal length of the fourth lens element is f4, and the focal length of the fifth lens element and the focal length of the sixth lens element is f56, the following conditions are satisfied: 0.19< | f3 × f 4/(f 56 × f 56) | <0.21.
Further, if the focal length of the fifth lens element is f5 and the combined focal length of the sixth lens element and the seventh lens element is f67, the following conditions are satisfied: 0.59< | f67/f5| <0.64.
Further, the sixth lens has a focal length f6, and satisfies the following condition: 0.86< | f6/EFL | <0.94.
Further, the combined focal length of the second lens, the third lens and the fourth lens is f234; the combined focal length of the fifth lens, the sixth lens and the seventh lens is f567, and the following conditions are satisfied: 0.51< | f234/f567| <0.57.
Further, the first lens, the second lens, the third lens and the fourth lens have a combined focal length of f1234, and then satisfy the following condition: 0.5< | EFL/f1234| <0.58.
The beneficial effects of the invention are as follows:
the lens can quickly shoot a distant scene and obtain a small-distortion picture.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a structural diagram of a 7G high-definition mirror with long focal length, large aperture and small distortion;
fig. 2 is a schematic view of an optical structure of a second embodiment of the lens system of the present disclosure;
fig. 3 is a graph of relative illuminance RI of the second embodiment of the lens of this patent;
fig. 4 is a graph of curvature of field & distortion of the second embodiment of the lens disclosed in this patent;
FIGS. 5A-K are fan diagrams of a second embodiment of the lens barrel of this patent;
fig. 6 is a graph of MTF resolution of the second embodiment of the lens of this patent;
FIG. 7 is a graph of MTF-Field resolution of the second embodiment of the lens of this patent;
fig. 8 is a schematic optical structure diagram of a third embodiment of the lens system of this patent;
fig. 9 is a graph of relative illuminance RI of the third embodiment of the lens of this patent;
fig. 10 is a field curvature & distortion graph of the third embodiment of the lens of this patent;
FIGS. 11A-K are fan diagrams of a third embodiment of the lens barrel of this patent;
fig. 12 is a graph of MTF resolution of the third embodiment of the lens of this patent;
fig. 13 is a graph of MTF-Field resolution of the third embodiment of the lens of this patent;
fig. 14 is a schematic view of an optical structure of a fourth embodiment of the lens barrel of the present patent;
fig. 15 is a graph of relative illuminance RI of the fourth embodiment of the lens of this patent;
fig. 16 is a graph of curvature of field & distortion for the fourth embodiment of the lens of this patent;
FIGS. 17A-K are fan diagrams of a fourth embodiment of the lens system of this patent;
fig. 18 is a graph of MTF resolution of the fourth embodiment of the lens of this patent;
fig. 19 is a MTF-Field resolution graph of the fourth embodiment of the lens in this patent.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides a 7G lens including a light entrance amount aperture stop for adjusting an incident light beam, an
The first lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is convex to the image space;
the second lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the third lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fourth lens is a negative lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fifth lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is concave to the image space;
the sixth lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the seventh lens, object side surface convex to object side, image side surface concave to image side.
In this embodiment, the first lens, the second lens, the third lens, the fourth lens, the aperture stop, the fifth lens, the sixth lens, and the seventh lens are sequentially arranged from the object side to the image side along the optical axis.
In this embodiment, the total focal length of the second lens element and the third lens element is f23, and the total focal length of the lens element is EFL, which satisfies the following conditions: 0.80< | f23/EFL | <0.86.
In this embodiment, if the focal length of the third lens element is f3, the focal length of the fourth lens element is f4, and the combined focal length of the fifth lens element and the sixth lens element is f56, the following conditions are satisfied: 0.19< | f3 | < f 4/(f 56 | < f 56) | <0.21.
In this embodiment, if the focal length of the fifth lens element is f5 and the combined focal length of the sixth lens element and the seventh lens element is f67, the following conditions are satisfied: 0.59< | f67/f5| <0.64.
In this embodiment, the focal length of the sixth lens element is f6, which satisfies the following condition: 0.86< | f6/EFL | <0.94.
In this embodiment, the combined focal length of the second lens, the third lens and the fourth lens is f234; the combined focal length of the fifth lens, the sixth lens and the seventh lens is f567, and the following conditions are satisfied: 0.51< | f234/f567| <0.57.
In this embodiment, if the total focal length of the first lens, the second lens, the third lens, and the fourth lens is f1234, it satisfies the following condition: 0.5< | EFL/f1234| <0.58.
Example 2
In an implementation level, referring to fig. 2-7, this embodiment provides a 7G lens including a light entrance amount aperture stop for adjusting an incident light beam, an
The first lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is convex to the image space;
the second lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the third lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fourth lens is a negative lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fifth lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is concave to the image space;
the sixth lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the seventh lens, object side surface convex to object side, image side surface concave to image side.
In the present embodiment of the present invention,
EFL＝14.56 Fno.＝1.54 Distortion＝1.00％
Figure BDA0003639854520000051
Figure BDA0003639854520000061
Figure BDA0003639854520000062
Figure BDA0003639854520000063
the present embodiment satisfies the following conditions:
1、0.80<|f23/EFL|<0.86；
2、0.19<|f3*f4/(f56*f56)|<0.21；
3、0.59<|f67/f5|<0.64；
4、0.86<|f6/EFL|<0.94；
5、0.51<|f234/f567|<0.57；
6、0.5<|EFL/f1234|<0.58。
each surface conical coefficient k and aspherical coefficient of the present example
Figure BDA0003639854520000064
Figure BDA0003639854520000071
Example 3
In an implementation level, referring to fig. 8-13, this embodiment provides a 7G lens including a light entrance amount aperture stop for adjusting an incident light beam, and
the first lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is convex to the image space;
the second lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the third lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fourth lens is a negative lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fifth lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is concave to the image space;
the sixth lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the seventh lens, object side surface convex to the object side, image side surface concave to the image side.
In the present embodiment, the first and second electrodes are,
EFL＝14.56 Fno.＝1.54 Distortion＝0.96％
Figure BDA0003639854520000072
Figure BDA0003639854520000081
Figure BDA0003639854520000082
Figure BDA0003639854520000083
the present embodiment satisfies the following conditions:
1、0.80<|f23/EFL|<0.86；
2、0.19<|f3*f4/(f56*f56)|<0.21；
3、0.59<|f67/f5|<0.64；
4、0.86<|f6/EFL|<0.94；
5、0.51<|f234/f567|<0.57；
6、0.5<|EFL/f1234|<0.58。
each surface conical coefficient k and aspherical coefficient of the present example
Figure BDA0003639854520000084
Figure BDA0003639854520000091
Example 4
In an embodiment, referring to fig. 14-19, this embodiment provides a 7G lens including an aperture stop for adjusting the amount of incident light, an
The first lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is convex to the image space;
the second lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the third lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fourth lens is a negative lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fifth lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is concave to the image space;
the sixth lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the seventh lens, object side surface convex to the object side, image side surface concave to the image side.
In the present embodiment, the first and second electrodes are,
EFL＝14.55 Fno.＝1.54 Distortion＝1.08％
Figure BDA0003639854520000092
Figure BDA0003639854520000101
Figure BDA0003639854520000102
Figure BDA0003639854520000103
the present embodiment satisfies the following conditions:
1、0.80<|f23/EFL|<0.86；
2、0.19<|f3*f4/(f56*f56)|<0.21；
3、0.59<|f67/f5|<0.64；
4、0.86<|f6/EFL|<0.94；
5、0.51<|f234/f567|<0.57；
6、0.5<|EFL/f1234|<0.58。
each surface conical coefficient k and aspherical coefficient of the present example
Figure BDA0003639854520000104
Figure BDA0003639854520000111
In conclusion, the lens can rapidly shoot a distant scene and obtain a small-distortion picture.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. A7G lens includes an aperture stop for adjusting an incident light flux, an
The first lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is convex to the image space;
the second lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the third lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fourth lens is a negative lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is concave to the image space;
the fifth lens is a negative lens, the surface of one side of the object space is concave to the object space, and the surface of one side of the image space is concave to the image space;
the sixth lens is a positive lens, the surface of one side of the object space is convex to the object space, and the surface of one side of the image space is convex to the image space;
the seventh lens, object side surface convex to object side, image side surface concave to image side.
2. The 7G lens according to claim 1, wherein the first lens, the second lens, the third lens, the fourth lens, the aperture stop, the fifth lens, the sixth lens and the seventh lens are arranged in this order from an object side along an optical axis to an image side.
3. The 7G lens according to claim 1, wherein the combined focal length of the second lens and the third lens is f23, and the total focal length of the lens is EFL, which satisfies the following conditions: 0.80< | f23/EFL | <0.86.
4. A 7G lens according to claim 1, wherein the third lens focal length is f3, the fourth lens focal length is f4, and the combined focal length of the fifth lens and the sixth lens is f56, then the following conditions are satisfied: 0.19< | f3 | f 4/(f 56 | f 56) | <0.21.
5. A 7G lens according to claim 1, wherein the fifth lens has a focal length f5, and the sixth lens and the seventh lens have a combined focal length f67, which satisfies the following condition: 0.59< | f67/f5| <0.64.
6. A 7G lens according to claim 1, wherein the sixth lens has a focal length f6, and satisfies the following condition: 0.86< | f6/EFL | <0.94.
7. The 7G lens according to claim 1, wherein the second lens, the third lens and the fourth lens have a combined focal length of f234; the combined focal length of the fifth lens, the sixth lens and the seventh lens is f567, and the following conditions are satisfied: 0.51< | f234/f567| <0.57.
8. A 7G lens according to claim 1, wherein the first lens, the second lens, the third lens and the fourth lens have a combined focal length of f1234, and satisfy the following condition: 0.5< | EFL/f1234| <0.58.
CN202210516484.XA 2022-05-12 2022-05-12 7G lens Active CN115202000B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107894652A (en) * 2017-12-20 2018-04-10 信华精机有限公司 A kind of small aberration optical lens of large aperture
JP2018105955A (en) * 2016-12-26 2018-07-05 富士フイルム株式会社 Imaging lens and imaging apparatus
CN111505810A (en) * 2020-07-02 2020-08-07 瑞声通讯科技(常州)有限公司 Image pickup optical lens
CN113376814A (en) * 2021-08-16 2021-09-10 江西晶超光学有限公司 Optical system, lens module and electronic equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018105955A (en) * 2016-12-26 2018-07-05 富士フイルム株式会社 Imaging lens and imaging apparatus
CN107894652A (en) * 2017-12-20 2018-04-10 信华精机有限公司 A kind of small aberration optical lens of large aperture
CN111505810A (en) * 2020-07-02 2020-08-07 瑞声通讯科技(常州)有限公司 Image pickup optical lens
CN113376814A (en) * 2021-08-16 2021-09-10 江西晶超光学有限公司 Optical system, lens module and electronic equipment

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