CN107608056B - Large aperture high pixel camera module - Google Patents
Large aperture high pixel camera module Download PDFInfo
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- CN107608056B CN107608056B CN201710898297.1A CN201710898297A CN107608056B CN 107608056 B CN107608056 B CN 107608056B CN 201710898297 A CN201710898297 A CN 201710898297A CN 107608056 B CN107608056 B CN 107608056B
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- 230000003287 optical effect Effects 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The embodiment of the invention discloses a large aperture high pixel camera module, which at least comprises a lens, a base and a light sensing device, wherein an optical system is arranged in the lens, and the optical system 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, and the image plane side is a concave surface; the object plane side of the second lens is a convex surface, and the image plane side is a concave surface; the object plane side of the third lens is a convex surface, and the image plane side is a concave surface; the fourth lens is a biconvex surface; the fifth lens is a biconvex surface; the object plane side of the sixth lens is a concave surface, and the image plane side is a convex surface; wherein, the fifth lens and the sixth lens are combined lenses and satisfy TTL/EFL less than or equal to 4.5. In the embodiment of the invention, the lens barrel is mainly composed of six lenses, the number of lenses is small, and the structure is simple; different lenses are combined with each other, and the fourth lens and the fifth lens are cemented lenses, so that the lens has the optical properties of large aperture, high pixels, low distortion, good athermalization and the like.
Description
Technical field:
the invention relates to a camera module, in particular to a large-aperture high-pixel camera module.
The background technology is as follows:
with the application and popularization of automobile safe driving systems, vehicle-mounted camera modules are also commonly used. The camera module applied to the electronic rearview mirror in the automobile can be suitable for clear imaging in daytime and night environments, so that the camera module needs to consider a large aperture; meanwhile, in order to meet the requirement of detail identification of the surrounding environment, the camera module needs to have higher definition. In order to meet the requirements, the defects of excessive lenses and complex structure of the existing vehicle-mounted camera module are overcome, and the large-aperture high-pixel camera module is provided.
The invention comprises the following steps:
in order to solve the problems of excessive lenses and complex structure of the existing vehicle-mounted camera module, the embodiment of the invention provides a large-aperture high-pixel camera module.
The large aperture high pixel camera module 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 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 convex surface, and the focal power of the second lens is positive;
the object plane side of the third lens is a concave 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 concave 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;
the fifth lens and the sixth lens are mutually glued to form a combined lens, TTL/EFL is less than or equal to 4.5, wherein TTL is the distance between the top point of the object plane side of the first lens of the optical system and the imaging plane, and EFL is the effective focal length of the optical system.
In the embodiment of the invention, the lens of the camera module is mainly composed of six lenses, the number of lenses is small, and the structure is simple; different lenses are combined, and the fifth lens and the sixth lens are cemented lenses, so that the lens has the optical properties of large aperture, high pixels, low distortion, good athermalization and the like.
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 graph showing the distortion of the camera module of the present invention at +25deg.C;
FIG. 3 is a graph showing the MTF of the camera module of the present invention at +25deg.C;
FIG. 4 is a graph showing the relative illuminance of the camera module of the present invention at +25deg.C;
FIG. 5 is a graph showing the MTF of the camera module of the present invention at-40 ℃;
fig. 6 is an MTF graph of the camera module of the present invention at +85℃.
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, the large aperture high pixel camera module at least includes a lens, a base matched with the lens, and a light sensing device arranged on the base 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 8 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 convex surface, and the focal power is positive;
the object plane side of the third lens 3 is a concave 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 concave 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 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;
the fifth lens 5 and the sixth lens 6 are glued to each other to form a combined lens, and TTL/EFL is not more than 4.5, wherein TTL is the distance between the top of the object plane side of the first lens of the optical system and the imaging plane, EFL is the effective focal length of the optical system, and the value of EFL is the focal length f of the whole optical system.
In the embodiment of the invention, the lens of the camera module mainly consists of six lenses, the number of lenses is small, and the structure is simple; different lenses are combined with each other, and the fifth lens and the sixth lens are cemented lenses, so that the lens has the optical properties of large aperture, high pixels, low distortion, good athermalization and the like.
Further, each lens of the optical system satisfies the following condition:
(1)-10<f1<-2；
(2)2<f2<10；
(3)-10<f3<-2；
(4)2<f4<10；
(5)2<f5<10；
(6)-15<f6<-5；
(7)5<f56<20；
wherein f1 is a focal length of the first lens 1, f2 is a focal length of the second lens 2, f3 is a focal length of the third lens 3, f4 is a focal length of the fourth lens 4, f5 is a focal length of the fifth lens 5, f6 is a focal length of the sixth lens 6, and f56 is a focal length of the fifth lens 5 combined with the sixth lens 6. Different lenses are combined with each other, so that the optical performance of large aperture, high pixel, low distortion, good athermalization and the like is achieved.
Still further, each lens of the optical system satisfies the following condition:
(1)-3.0<f1/f<-0.8；
(2)0.5<f2/f<1.5；
(3)-1.5<f3/f<-0.5；
(4)1.2<f4/f<2.0；
(5)0.8<f5/f<1.7；
(6)2.0<f6/f<3.2；
(7)-3.0<f56/f<-1.0；
wherein f is the focal length of the whole optical system, 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, and f56 is the focal length of the combination of the fifth lens 5 and the sixth lens 6. Different lenses are combined with each other, so that the optical performance of large aperture, high pixel, low distortion, good athermalization and the like is achieved.
Further, the refractive index Nd1 of the material of the first lens 1, the abbe constant Vd1 of the material satisfy: 1.75< nd1<1.95, 25< vd1<50. The structure is simple, and good optical performance can be ensured.
Still further, the refractive index Nd2 of the material of the second lens 2, the abbe constant Vd2 of the material satisfy: 1.80< Nd2<2.10,20< Vd2<35. The structure is simple, and good optical performance can be ensured.
Still further, the refractive index Nd3 of the material of the third lens 3, the abbe constant Vd3 of the material satisfy: 1.75< Nd3<1.95, 17< Vd3<40. The structure is simple, and good optical performance can be ensured.
Further, the material refractive index Nd4 and the material abbe constant Vd4 of the fourth lens 4 satisfy: 1.75< Nd4<1.95, 35< Vd4<55. The structure is simple, and good optical performance can be ensured.
Still further, the refractive index Nd5 of the material and the abbe constant Vd5 of the fifth lens 5 satisfy: 1.55< Nd5<1.75, 45< Vd5<70. The structure is simple, and good optical performance can be ensured.
Still further, the refractive index Nd6 of the material of the sixth lens 6, the abbe constant Vd6 of the material satisfy: 1.75< nd6<1.98, 15< vd6<40. The structure is simple, and good optical performance can be ensured.
Further, an aperture stop 7 of the optical system is located between the first lens 1 and the second lens 2, near the second lens 2 side. 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 4.5mm, the diaphragm index fno is 1.7, the angle of view 2ω=90°, and it is suitable for 1/2.7 "high definition Sensor. 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 corresponds to the position of the aperture stop STO of the optical system, and S4 and S5 correspond to the two surfaces of the second lens 2; s6 and S7 correspond to two surfaces of the third lens 3; 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; s13, S14 correspond to two surfaces of a cover glass (coverglas) located between the sixth lens 6 and the image plane 8; s15 corresponds to the Sensor imaging plane 8.
As can be seen from fig. 2 to 6, the camera module in the embodiment has very good performance of eliminating heat difference. The combination of different lenses and the reasonable distribution of optical power are adopted to realize the optical performances of large aperture, high pixel, low distortion, good athermalization and the like.
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 (1)
1. The large aperture high pixel shooting 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 diaphragm, 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 curvature radius is 8.50mm, the image plane side is a concave surface, the curvature radius is 2.70mm, the focal power is negative, the thickness is 1.00mm, the refractive index Nd1 of the material is 1.91, the Abbe constant Vd1 of the material is 35.25, and the distance from the first lens to the diaphragm is 2.70mm;
the object plane side of the second lens is a convex surface, the curvature radius is 8.20mm, the image plane side is a convex surface, the curvature radius is-9.20 mm, the focal power is positive, the thickness is 1.7mm, the refractive index Nd2 of the material is 1.94, the Abbe constant Vd2 of the material is 17.94, the distance from the diaphragm to the second lens is 0.00mm, and the distance from the second lens to the third lens is 0.20mm;
the object plane side of the third lens is a concave surface, the curvature radius is-6.20 mm, the image plane side is a concave surface, the curvature radius is 12.20mm, the focal power is negative, the thickness is 2.20mm, the refractive index Nd3 of the material is 1.80, the Abbe constant Vd3 of the material is 25.47, and the distance from the third lens to the fourth lens is 0.50mm;
the object plane side of the fourth lens is concave, the curvature radius is-17.50 mm, the image plane side is convex, the curvature radius is-4.50 mm, the focal power is positive, the thickness is 1.50mm, the refractive index Nd4 of the material is 1.83, the Abbe constant Vd4 of the material is 42.72, and the distance from the fourth lens to the fifth lens is 0.10mm;
the object plane side of the fifth lens is a convex surface, the curvature radius is 10.70mm, the image plane side is a convex surface, the curvature radius is-4.70 mm, the focal power is positive, the thickness is 2.00mm, the refractive index Nd5 of the material is 1.56, the Abbe constant Vd5 of the material is 56.05, and the distance from the fifth lens to the sixth lens is 0.00mm;
the sixth lens element has a concave object plane side, a radius of curvature of-4.70 mm, a radius of curvature of-10.70 mm, a convex image plane side, a negative optical power, a thickness of 0.70mm, a refractive index Nd6 of 1.92 and an abbe constant Vd6 of 20.88.
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| CN201710898297.1A CN107608056B (en) | 2017-09-28 | 2017-09-28 | Large aperture high pixel camera module |
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| CN201710898297.1A CN107608056B (en) | 2017-09-28 | 2017-09-28 | Large aperture high pixel camera module |
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| CN107608056B true CN107608056B (en) | 2023-10-27 |
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| CN207264010U (en) | 2017-09-28 | 2018-04-20 | 广东弘景光电科技股份有限公司 | The high pixel optics system of large aperture and its camera module of application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125257A (en) * | 2016-08-31 | 2016-11-16 | 广东弘景光电科技股份有限公司 | Low distorted optical system and the camera lens of application thereof |
| CN206020791U (en) * | 2016-08-31 | 2017-03-15 | 广东弘景光电科技股份有限公司 | The low distorted optical system of small size and its camera lens of application |
| CN107065140A (en) * | 2017-05-04 | 2017-08-18 | 威海嘉瑞光电科技股份有限公司 | A kind of intelligent vehicle-carried high-pixel wide-angle camera lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125257A (en) * | 2016-08-31 | 2016-11-16 | 广东弘景光电科技股份有限公司 | Low distorted optical system and the camera lens of application thereof |
| CN206020791U (en) * | 2016-08-31 | 2017-03-15 | 广东弘景光电科技股份有限公司 | The low distorted optical system of small size and its camera lens of application |
| CN107065140A (en) * | 2017-05-04 | 2017-08-18 | 威海嘉瑞光电科技股份有限公司 | A kind of intelligent vehicle-carried high-pixel wide-angle camera lens |
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