CN107632374B - High-pixel large-target-surface large-aperture ultra-wide-angle camera shooting module - Google Patents
High-pixel large-target-surface large-aperture ultra-wide-angle camera shooting module Download PDFInfo
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- CN107632374B CN107632374B CN201711087729.7A CN201711087729A CN107632374B CN 107632374 B CN107632374 B CN 107632374B CN 201711087729 A CN201711087729 A CN 201711087729A CN 107632374 B CN107632374 B CN 107632374B
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Abstract
The embodiment of the invention discloses a high-pixel large-target-surface large-aperture ultra-wide-angle camera module, which sequentially comprises the following components along an optical axis from an object plane to an image plane: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the optical power of the first lens is negative; the optical power of the second lens is negative; the focal power of the third lens is negative; the focal power of the fourth lens is positive; the focal power of the fifth lens is positive; the focal power of the sixth lens is negative; and the total optical length TTL of the optical system meets the following conditions: TTL is more than or equal to 20mm and less than or equal to 28mm. The embodiment of the invention mainly comprises 6 lenses, and has the advantages of less lenses, simple structure and lower cost; the different lenses are combined with each other and the focal power is reasonably distributed, so that the chromatic aberration and the temperature effect of the system can be effectively compensated, and the system has good optical properties such as large target surface, large aperture, good resolving power, small distortion, good temperature performance and the like.
Description
Technical field:
the invention relates to a camera module, in particular to a high-pixel large-target-surface large-aperture ultra-wide-angle camera module.
The background technology is as follows:
the full-glass camera module currently applied to electronic products has the defects of low resolving power, serious purple fringing of a large aperture optical system, poor temperature effect and the like. Meanwhile, the high-pixel large-target-surface camera module generally adopts a structure of more than 8G, and has the problems of high cost, small aperture, lower light flux and the like.
The invention comprises the following steps:
in order to solve the problems of low resolving power, serious purple fringing and poor temperature effect of the existing camera module, the embodiment of the invention provides a high-pixel large-target-surface large-aperture ultra-wide-angle camera module.
The high-pixel large-target-surface large-aperture ultra-wide-angle camera shooting module is sequentially provided with: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens;
the object plane side of the first lens is a convex surface, the image plane side is a concave surface, and the focal power of the first lens is negative;
the object plane side of the second lens is a convex surface, the image plane side is a concave surface, and the focal power of the second lens is negative;
the object plane side of the third lens is a convex surface, the image plane side is a concave surface, and the focal power of the third lens is negative;
the object plane side of the fourth lens is a convex surface, the image plane side is a convex surface, and the focal power of the fourth lens is positive;
the object plane side of the fifth lens is a convex surface, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens is a concave surface, the image plane side is a convex surface, and the focal power of the sixth lens is negative;
and the total optical length TTL of the optical system meets the following conditions: TTL is more than or equal to 20mm and less than or equal to 28mm.
The embodiment of the invention mainly comprises 6 lenses, and has the advantages of less lenses, simple structure and lower cost; the different lenses are combined with each other and the focal power is reasonably distributed, so that the chromatic aberration and the temperature effect of the system can be effectively compensated, and the system has good optical properties such as large target surface, large aperture, good resolving power, small distortion, good temperature performance and the like. The optical system can meet the resolution of a 5M chip, fully considers the compatibility of a large target surface, a large field angle and image quality, ensures that the optical system has excellent imaging quality under the condition of a large visual angle, has better color reproducibility under the condition of a large aperture, and has wider temperature use environment.
Description of the drawings:
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a camera module according to the present invention;
FIG. 2 is a defocus graph of the camera module of the present invention;
FIG. 3 is a graph of distortion of a camera module of the present invention;
FIG. 4 is a graph of MTF of the camera module of the present invention;
FIG. 5 is a-20deg.C defocus plot of the camera module of the present invention;
fig. 6 is a 60 ℃ defocus graph of the camera module of the present invention.
The specific embodiment is as follows:
in order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a high-pixel large-target-surface large-aperture ultra-wide-angle camera module at least comprises a lens, a base matched with the lens, and a light sensing device arranged on the base and used for receiving light signals from the lens, wherein an optical system is arranged in the lens, and the optical system is sequentially arranged from an object plane to an image plane along an optical axis: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, and a sixth lens 6.
The object plane side of the first lens 1 is a convex surface, the image plane side is a concave surface, and the focal power of the first lens is negative;
the object plane side of the second lens 2 is a convex surface, the image plane side is a concave surface, and the focal power of the second lens is negative;
the object plane side of the third lens 3 is a convex surface, the image plane side is a concave surface, and the focal power of the third lens is negative;
the object plane side of the fourth lens 4 is a convex surface, the image plane side is a convex surface, and the focal power is positive;
the object plane side of the fifth lens 5 is a convex surface, the image plane side is a convex surface, and the focal power thereof is positive;
the object plane side of the sixth lens 6 is a concave surface, the image plane side is a convex surface, and the focal power thereof is negative;
and the total optical length TTL of the optical system meets the following conditions: TTL is more than or equal to 20mm and less than or equal to 28mm.
The embodiment of the invention mainly comprises 6 lenses, and has the advantages of less lenses, simple structure and lower cost; the different lenses are combined with each other and the focal power is reasonably distributed, so that the chromatic aberration and the temperature effect of the system can be effectively compensated, and the system has good optical properties such as large target surface, large aperture, good resolving power, small distortion, good temperature performance and the like. The optical system can meet the resolution of a 5M chip, fully considers the compatibility of a large target surface, a large field angle and image quality, ensures that the optical system has excellent imaging quality under the condition of a large visual angle, has better color reproducibility under the condition of a large aperture, and has wider temperature use environment.
Further, in the present embodiment, the fifth lens 5 and the sixth lens 6 are cemented with each other to form a combined lens. The optical system has the advantages of large target surface, large aperture, good resolving power, small distortion, good temperature performance and the like by the combination of different lenses and the reasonable distribution of the focal power.
Still further, as a specific embodiment of the present invention, not limiting, each lens of the optical system satisfies the following condition:
(1)-0.64<f/f1<-0.26；
(2)-0.25<f/f2<-0.05；
(3)-0.32<f/f3<-0.18；
(4)0.50<f/f4<1.21；
(5)0.51<f/f5<1.49；
(6)-0.85<f/f6<-0.38；
(7)Vd2-Vd4>30；
wherein f1 is the focal length of the first lens 1, f2 is the focal length of the second lens 2, f3 is the focal length of the third lens 3, f4 is the focal length of the fourth lens 4, f5 is the focal length of the fifth lens 5, f6 is the focal length of the sixth lens 6, f is the focal length of the entire optical system, and Vd2 and Vd4 are abbe constants of materials of the second lens 2 and the fourth lens 4, respectively. Through the mutual combination of different lenses and the reasonable distribution of the focal power, the optical system has the advantages of large target surface, large aperture, good resolving power, small distortion, excellent temperature performance and other good optical performances.
Further, as a preferred embodiment of the present embodiment, not limiting, the focal length f1 of the first lens 1, the material refractive index Nd1, the material abbe constant Vd1 satisfy: -11.31mm < f1< -4.69mm,1.49< Nd1<1.70, 50< Vd1<67. The structure is simple, and good optical performance can be ensured.
Still further, as a preferred embodiment of the present embodiment, without limitation, the focal length f2, the material refractive index Nd2, and the material abbe constant Vd2 of the second lens 2 satisfy: -60.04mm < f2< -11.82mm,1.45< nd2<1.65, 60< vd2<91. The structure is simple, and good optical performance can be ensured.
Specifically, as a preferred embodiment of the present embodiment, not limiting, the focal length f3, the material refractive index Nd3, and the material abbe constant Vd3 of the third lens 3 satisfy: -16.45mm < f3< -9.28mm,1.55< nd3<1.85, 23< vd3<45. The structure is simple, and good optical performance can be ensured.
More specifically, as a preferred embodiment of the present embodiment, not limiting, the focal length f4 of the fourth lens 4, the material refractive index Nd4, the material abbe constant Vd4 satisfy: 2.47mm < f4<6.02mm,1.80< Nd4<1.96, 25< Vd4<50. The structure is simple, and good optical performance can be ensured.
Further, as a preferred embodiment of the present embodiment, not limiting, the focal length f5, the material refractive index Nd5, and the material abbe constant Vd5 of the fifth lens 5 satisfy: 2.01mm < f5<5.93mm,1.55< Nd5<1.76, 45< Vd5<70. The structure is simple, and good optical performance can be ensured.
Further, as a preferred embodiment of the present embodiment, without limitation, the focal length f6 of the sixth lens 6, the material refractive index Nd6, and the material abbe constant Vd6 satisfy: -7.89mm < f6< -3.53mm,1.80< nd6<2.05, 15< vd6<30. The structure is simple, and good optical performance can be ensured.
Still further, the diaphragm 7 of the present optical system is located between the third lens 3 and the fourth lens 4. The structure is simple, and the device is used for adjusting the intensity of the light beam.
Specifically, in the present embodiment, the focal length f of the present optical system is 3.24mm, the diaphragm index fno is 1.8, the angle of view 2ω=172°, the total optical length TTL is 21.2mm, and the maximum image circle size is 7.8mm. The basic parameters of the optical system are shown in the following table:
in the table, S1 and S2 are two surfaces of the first lens 1 along the optical axis from the object plane to the image plane; s3 and S4 correspond to two surfaces of the second lens 2; s5 and S6 correspond to two surfaces of the third lens 3; STO is the diaphragm 7; s8 and S9 correspond to two surfaces of the fourth lens 4; s10 and S11 correspond to two surfaces of the fifth lens 5; s11 and S12 correspond to two surfaces of the sixth lens 6; IMA is the image plane 8.
As can be seen from fig. 2 to fig. 6, the optical system in the embodiment can effectively compensate the chromatic aberration and the temperature effect of the system, and has good optical performance such as large target surface, large aperture, good resolving power, small distortion, and good temperature performance.
The foregoing description of one or more embodiments provided in connection with the specific disclosure is not intended to limit the practice of the invention to such description. The method, structure, etc. similar to or identical to those of the present invention, or some technical deductions or substitutions are made on the premise of the inventive concept, should be regarded as the protection scope of the present invention.
Claims (9)
1. The high-pixel large-target-surface large-aperture ultra-wide-angle camera module at least comprises a lens, a base matched with the lens and a light sensing device arranged on the base and used for receiving light signals from the lens, wherein an optical system is arranged in the lens, and the optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object plane to an image plane along an optical axis; it is characterized in that the method comprises the steps of,
the object plane side of the first lens is a convex surface, the image plane side is a concave surface, and the focal power of the first lens is negative;
the object plane side of the second lens is a convex surface, the image plane side is a concave surface, and the focal power of the second lens is negative;
the object plane side of the third lens is a convex surface, the image plane side is a concave surface, and the focal power of the third lens is negative;
the object plane side of the fourth lens is a convex surface, the image plane side is a convex surface, and the focal power of the fourth lens is positive;
the object plane side of the fifth lens is a convex surface, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens is a concave surface, the image plane side is a convex surface, and the focal power of the sixth lens is negative;
and the total optical length TTL of the optical system meets the following conditions: TTL is more than or equal to 20mm and less than or equal to 28mm;
each lens of the optical system satisfies the following condition:
(1)-0.64<f/f1<-0.26；
(2)-0.25<f/f2<-0.05；
(3)-0.32<f/f3<-0.18；
(4)0.50<f/f4<1.21；
(5)0.51<f/f5<1.49；
(6)-0.85<f/f6<-0.38；
(7)Vd2-Vd4>30；
wherein f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, f is the focal length of the entire optical system, and Vd2 and Vd4 are the abbe constants of the materials of the second lens and the fourth lens, respectively.
2. The high-pixel large-target-surface large-aperture ultra-wide-angle camera module of claim 1, wherein the fifth lens and the sixth lens are glued to each other to form a combined lens.
3. The high-pixel large-target-surface large-aperture ultra-wide-angle imaging module according to claim 1, wherein a focal length f1, a material refractive index Nd1, and a material abbe constant Vd1 of the first lens satisfy: -11.31mm < f1< -4.69mm,1.49< Nd1<1.70, 50< Vd1<67.
4. The high-pixel large-target-surface large-aperture ultra-wide-angle camera module according to claim 1, wherein a focal length f2, a material refractive index Nd2, and a material abbe constant Vd2 of the second lens satisfy: -60.04mm < f2< -11.82mm,1.45< nd2<1.65, 60< vd2<91.
5. The high-pixel large-target-surface large-aperture ultra-wide-angle imaging module according to claim 1, wherein a focal length f3, a material refractive index Nd3, and a material abbe constant Vd3 of the third lens satisfy: -16.45mm < f3< -9.28mm,1.55< nd3<1.85, 23< vd3<45.
6. The high-pixel large-target-surface large-aperture ultra-wide-angle imaging module according to claim 1, wherein a focal length f4 of the fourth lens, a material refractive index Nd4, and a material abbe constant Vd4 satisfy: 2.47mm < f4<6.02mm,1.80< Nd4<1.96, 25< Vd4<50.
7. The high-pixel large-target-surface large-aperture ultra-wide-angle imaging module according to claim 1, wherein a focal length f5 of the fifth lens, a material refractive index Nd5, and a material abbe constant Vd5 satisfy:
2.01mm<f5<5.93mm，1.55<Nd5<1.76，45<Vd5<70。
8. the high-pixel large-target-surface large-aperture ultra-wide-angle imaging module according to claim 1, wherein a focal length f6 of the sixth lens, a material refractive index Nd6, and a material abbe constant Vd6 satisfy: -7.89mm < f6< -3.53mm,1.80< nd6<2.05, 15< vd6<30.
9. The high-pixel large-target-surface large-aperture ultra-wide-angle camera module of claim 1, wherein the diaphragm of the optical system is positioned between the third lens and the fourth lens.
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Citations (4)
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| JP2008233610A (en) * | 2007-03-22 | 2008-10-02 | Fujinon Corp | Imaging lens and imaging device equipped with the imaging lens |
| JP2012068448A (en) * | 2010-09-24 | 2012-04-05 | Olympus Imaging Corp | Optical system and imaging apparatus using the same |
| JPWO2012026070A1 (en) * | 2010-08-25 | 2013-10-28 | パナソニック株式会社 | Single focus lens system, interchangeable lens device and camera system |
| CN206115006U (en) * | 2016-09-05 | 2017-04-19 | 江西联益光学有限公司 | Fish -eye lens |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008233610A (en) * | 2007-03-22 | 2008-10-02 | Fujinon Corp | Imaging lens and imaging device equipped with the imaging lens |
| JPWO2012026070A1 (en) * | 2010-08-25 | 2013-10-28 | パナソニック株式会社 | Single focus lens system, interchangeable lens device and camera system |
| JP2012068448A (en) * | 2010-09-24 | 2012-04-05 | Olympus Imaging Corp | Optical system and imaging apparatus using the same |
| CN206115006U (en) * | 2016-09-05 | 2017-04-19 | 江西联益光学有限公司 | Fish -eye lens |
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