CN109752821B - Vehicle-mounted monitoring camera module - Google Patents
Vehicle-mounted monitoring camera module Download PDFInfo
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- CN109752821B CN109752821B CN201711087721.0A CN201711087721A CN109752821B CN 109752821 B CN109752821 B CN 109752821B CN 201711087721 A CN201711087721 A CN 201711087721A CN 109752821 B CN109752821 B CN 109752821B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 2
- 239000005308 flint glass Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The embodiment of the invention discloses a vehicle-mounted monitoring camera module, which is sequentially provided with: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the first lens is a biconcave lens, and the focal power of the first lens is negative; the second lens is a biconvex lens, and the focal power of the second lens is positive; the third lens is a biconcave lens, and the focal power of the third lens is negative; the fourth lens is a biconvex lens, and the focal power of the fourth lens is positive; the fifth lens is a biconvex lens, 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 embodiment of the invention mainly comprises 6 lenses, and has simple structure; different lenses are combined with each other and optical power is reasonably distributed, so that the lens has good performances such as high pixel, large aperture, light ghost, small distortion, excellent temperature performance and the like, and can keep the resolution performance of 2M pixels in the temperature range of-40 ℃ to +85 ℃.
Description
Technical field:
the invention relates to a camera module, in particular to a vehicle-mounted monitoring camera module.
The background technology is as follows:
with the development of active safety technology in the automobile industry, the requirements on the vehicle-mounted front view lens are continuously improved, and distortion is small, more than one million pixels, large aperture, light ghost and the like are the requisite conditions of the lens. However, the existing vehicle-mounted monitoring camera module has the defects of complex structure and low pixel.
The invention comprises the following steps:
in order to solve the problems of complex structure and low pixels of the existing vehicle-mounted monitoring camera module, the embodiment of the invention provides the vehicle-mounted monitoring camera module.
The vehicle-mounted monitoring camera 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 concave 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 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.
The embodiment of the invention mainly comprises 6 lenses, and has simple structure; different lenses are combined with each other and optical power is reasonably distributed, so that the lens has good performances such as high pixel, large aperture, light ghost, small distortion, excellent temperature performance and the like, and can keep the resolution performance of 2M pixels in the temperature range of-40 ℃ to +85 ℃.
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 of MTF of the camera module of the present invention;
FIG. 3 shows a camera module of the present invention with a 6.8mm length aluminum base having a coefficient of thermal expansion of 2.3 x 10 -5 Defocus at +20deg.C at 60 lp/mm;
FIG. 4 shows a camera module of the present invention with a 6.8mm length aluminum base having a coefficient of thermal expansion of 2.3 x 10 -5 Defocus at-40℃at 60 lp/mm;
FIG. 5 shows a camera module of the present invention with a 6.8mm length aluminum base having a coefficient of thermal expansion of 2.3 x 10 -5 Defocus at 60lp/mm 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 vehicle-mounted monitoring 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 provided with: 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 concave 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 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 sixth lens element 6 has a concave object-side surface, a convex image-side surface, and a negative optical power.
The embodiment of the invention mainly comprises 6 lenses, and has simple structure; different lenses are combined with each other and optical power is reasonably distributed, so that the lens has good performances such as high pixel, large aperture, light ghost, small distortion, excellent temperature performance and the like, and can keep the resolution performance of 2M pixels in the temperature range of-40 ℃ to +85 ℃.
Further, in the present embodiment, the fifth lens 5 is made of a glass material, and the temperature coefficient dn/dt of its refractive index is <0.
Still further, as a preferred embodiment of the present invention, not limiting, each lens of the optical system satisfies the following condition:
(1)-2.01<f/f1<-0.79；
(2)0.79<f/f2<2.01；
(3)-2.95<f/f3<-1.06；
(4)0.90<f/f4<2.02；
(5)0.81<f/f5<2.12；
(6)-2.71<f/f6<-0.63；
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, and f is the focal length of the entire optical system. Different lenses are combined with each other and optical power is reasonably distributed, so that the lens has good performances such as high pixel, large aperture, light ghost, small distortion, excellent temperature performance and the like, and can keep the resolution performance of 2M pixels in the temperature range of-40 ℃ to +85 ℃.
Still further, as a preferred embodiment of the present solution, not limiting, the fifth lens 5 and the sixth lens 6 are cemented with each other to form a combined lens, the focal length f56 of which satisfies: 12.13mm < f56<68.78mm. The structure is simple and compact, and good optical performance can be ensured.
Further, as a preferred embodiment of the present invention, not limiting, each lens of the optical system satisfies the following condition:
(1)0≤φ1+φ2＜0.1；
(2)0.09<f/f56<0.51；
(3)Vd5-Vd6>30；
wherein, phi 1 and phi 2 are the optical power of the first lens 1 and the second lens 2 respectively, f56 is the combined focal length of the fifth lens 5 and the sixth lens 6, f is the focal length of the whole optical system, and Vd5 and Vd6 are the abbe constants of the materials of the fifth lens 5 and the sixth lens 6 respectively. Has good performances such as high pixel, large aperture, light ghost, small distortion, good temperature performance and the like.
Specifically, in the present embodiment, the focal length f1, the material refractive index Nd1, and the material abbe constant Vd1 of the first lens 1 satisfy: -7.83mm < f1< -3.08mm,1.48< Nd1<1.80, 40< Vd1. The structure is simple, and good optical performance can be ensured.
Further, in the present embodiment, the second lens 2 is made of a heavy lanthanum flint glass material, and the focal length f2, the material refractive index Nd2, and the material abbe constant Vd2 thereof satisfy: 3.08mm < f2<7.83mm,1.89< Nd2<2.06, 16< Vd2<40. The structure is simple, and good optical performance can be ensured.
Still further, in the present embodiment, the third lens 3 is made of a heavy flint glass material, and the focal length f3, the material refractive index Nd3, and the material abbe constant Vd3 thereof satisfy: -5.84mm < f3< -2.10mm,1.64< nd3<1.95, 15< vd3<35. The structure is simple, and good optical performance can be ensured.
Still further, in the present embodiment, the fourth lens 4 is made of a heavy lanthanum flint glass material, and the focal length f4, the material refractive index Nd4, and the material abbe constant Vd4 thereof satisfy: 3.06mm < f4<6.88mm,1.89< nd4<2.06, 16< vd4<40. The structure is simple, and good optical performance can be ensured.
Further, in the present embodiment, the focal length f5, the material refractive index Nd5, the material abbe constant Vd5, and the temperature coefficient dn/dt of the refractive index of the fifth lens 5 satisfy: 2.92mm < f5<7.64mm,1.45< Nd5<1.63, 60< Vd5<91, dn/dt <0. The structure is simple, and good optical performance can be ensured.
Still further, in the present embodiment, the sixth lens 6 is made of a heavy flint glass material, and the focal length f6, the material refractive index Nd6, and the material abbe constant Vd6 thereof satisfy: -9.82mm < f6< -2.28mm,1.64< nd3<1.95, 15< vd3<35. The structure is simple, and good optical performance can be ensured.
Further, the total optical length TTL of the present optical system satisfies: 16mm < TTL <22mm. Good optical properties 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, near the fourth lens 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 6.18mm, the diaphragm index fno is 1.6, the angle of view 2ω=70.4°, and the optical total length TTL is 18.7mm. 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 5, the optical system in the present embodiment has good performances such as high pixel, large aperture, light ghost, small distortion, excellent temperature performance, and the like, and can maintain the resolution performance of 2M pixels in the temperature range of-40 to +85 ℃.
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 vehicle-mounted monitoring 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 concave surface, the image plane side is a concave surface, the focal power of the concave surface is negative, the curvature radius of the object plane is-26.47 mm, the thickness of the first lens is 0.51mm, the curvature radius of the image plane is 6.50mm, the distance from the first lens to the second lens is 0.69mm, and the refractive index Nd1 of the material of the first lens is 1.720000;
the object plane side of the second lens is a convex surface, the image plane side is a convex surface, the focal power of the second lens is positive, the curvature radius of the object plane is 8.21mm, the thickness of the second lens is 2.61mm, the curvature radius of the image plane is-16.64 mm, the distance from the second lens to the third lens is 0.47mm, and the refractive index Nd2 of the material of the second lens is 2.003307;
the object plane side of the third lens is a concave surface, the image plane side is a concave surface, the focal power of the concave surface is negative, the curvature radius of the object plane is-6.60 mm, the thickness of the third lens is 0.46mm, the curvature radius of the image plane is 7.65mm, the distance from the third lens to the diaphragm is 0.64mm, and the refractive index Nd3 of the material of the third lens is 1.922867;
the distance from the diaphragm to the fourth lens is-0.23 mm;
the object plane side of the fourth lens is a convex surface, the image plane side is a convex surface, the focal power of the fourth lens is positive, the curvature radius of the object plane is 10.18mm, the thickness of the fourth lens is 3.45mm, the curvature radius of the image plane is-7.22 mm, the distance from the fourth lens to the fifth lens is 0.45mm, and the material refractive index Nd4 of the fourth lens is 2.000689;
the object plane side of the fifth lens is a convex surface, the image plane side is a convex surface, the focal power of the fifth lens is positive, the curvature radius of the object plane is 11.02mm, the thickness of the fifth lens is 3.35mm, the curvature radius of the image plane is-2.94 mm, the distance from the fifth lens to the sixth lens is 0mm, and the refractive index Nd5 of the material of the fifth lens is 1.592807;
the object plane side of the sixth lens is a concave surface, the image plane side is a convex surface, the focal power of the sixth lens is negative, the curvature radius of the object plane is-2.94 mm, the thickness of the sixth lens is 0.45mm, the curvature radius of the image plane is-27.99 mm, and the material refractive index Nd6 of the sixth lens is 1.647693.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711087721.0A CN109752821B (en) | 2017-11-08 | 2017-11-08 | Vehicle-mounted monitoring camera module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711087721.0A CN109752821B (en) | 2017-11-08 | 2017-11-08 | Vehicle-mounted monitoring camera module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109752821A CN109752821A (en) | 2019-05-14 |
| CN109752821B true CN109752821B (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711087721.0A Active CN109752821B (en) | 2017-11-08 | 2017-11-08 | Vehicle-mounted monitoring camera module |
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| CN (1) | CN109752821B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021102744A1 (en) * | 2019-11-27 | 2021-06-03 | 天津欧菲光电有限公司 | Camera lens assembly, image capture module, and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736218A (en) * | 2012-05-31 | 2012-10-17 | 舜宇光学(中山)有限公司 | 5-megapixel monitoring lens |
| CN204389773U (en) * | 2012-07-23 | 2015-06-10 | 富士胶片株式会社 | Imaging lens system and camera head |
| 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 |
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2017
- 2017-11-08 CN CN201711087721.0A patent/CN109752821B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736218A (en) * | 2012-05-31 | 2012-10-17 | 舜宇光学(中山)有限公司 | 5-megapixel monitoring lens |
| CN204389773U (en) * | 2012-07-23 | 2015-06-10 | 富士胶片株式会社 | Imaging lens system and camera head |
| 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 |
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| CN109752821A (en) | 2019-05-14 |
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