CN221079040U - 8M vehicle-mounted front-view main camera - Google Patents
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Abstract
The utility model relates to an 8M vehicle-mounted front-view main camera, wherein an optical system of a lens consists of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus concave negative lens, the second lens is a meniscus concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a negative lens, and the sixth lens is a biconvex positive lens. The driving visual perception and recognition functions are realized, meanwhile, 8MP imaging is realized, so that the front-view wide-angle camera and the front-view narrow-angle camera can be replaced, a front-view camera module is formed by a single lens, the cost is greatly reduced, and the market popularity is improved. The overall length of the lens and the radial dimension of each lens are reduced by reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like, so that the miniaturization of the lens group is realized.
Description
Technical Field
The utility model relates to an 8M vehicle-mounted front-view main camera, and relates to the technical field of lenses.
Background
The functions of the vehicle-mounted forward-looking camera system mainly comprise two types: firstly, the method is used for recording the driving track and taking the driving track as one of important basis for responsibility judgment after traffic accidents occur; the auxiliary driving device is used for assisting driving, can prevent the automobile from being deviated from a lane in the driving process and avoid collision with pedestrians on a road, and therefore traffic accidents are effectively reduced. The in-vehicle forward-looking image pickup system is an important hardware terminal in the advanced driving assistance system. Traditional vehicle-mounted front-view camera shooting modules on the market can be divided into three structures: the adoption of the three cameras greatly improves the cost of the whole camera module and is not beneficial to the popularization of the market as the name implies.
Disclosure of utility model
In view of the defects of the prior art, the technical problem to be solved by the utility model is to provide an 8M vehicle-mounted front-view main camera.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the optical system of the lens consists of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus concave negative lens, the second lens is a meniscus concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a negative lens, and the sixth lens is a biconvex positive lens.
Preferably, the focal length of the optical system is set to be f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are respectively set to be f 1、f2、f3、f4、f5、f6、f7, wherein f 1、f2、f3、f4、f5、f6、f7 and f satisfy the following proportion ：-2.5<f1/f<-1.5,-5.0<f2/f<-3.0,2.0<f3/f<2.5,1.5<f4/f<2.0,-1.5<f5/f<-1.0,1.5<f6/f<3.0,-8.0<f7/f<122.0.
Preferably, the first lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the second lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the third lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the fourth lens satisfies the relation: n d≤1.8,Vd is more than or equal to 1.5 and is more than or equal to 50.0; the fifth lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the sixth lens satisfies the relation: n d≤1.8,Vd is more than or equal to 1.5 and is more than or equal to 50.0; the seventh lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; where N d is the refractive index and V d is the Abbe's constant.
Preferably, the lens is made of glass material, and the fourth lens and the fifth lens are cemented lens groups.
Preferably, the on-axis distance between the lenses satisfies the following relationship, the air space between the first lens and the second lens being: 4.0-5.0 mm; the air interval between the second lens and the third lens is as follows: 0.1-0.5 mm; the air interval between the third lens and the diaphragm is as follows: 2.0-2.5 mm; the air interval between the diaphragm and the fourth lens is: 0.5-1.0 mm; the fourth lens and the fifth lens are a cemented lens group, and the air interval is 0mm; air separation of the fifth lens from the sixth lens: 0.1-0.5 mm; the air interval between the sixth lens and the seventh lens is as follows: 0.1-1.0 mm.
Preferably, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 7.5.
Preferably, the F number of the optical system is less than or equal to 1.5.
Preferably, the image height H of the optical system and the focal length f of the optical system satisfy: h/f is more than or equal to 1.0.
Preferably, a filter is disposed at a rear side of the seventh lens.
Compared with the prior art, the utility model has the following beneficial effects:
1. The imaging angle of the lens to the object is more than 140 degrees, and the lens has the advantages of ultra-high 8M imaging definition, large light transmission caliber, low tolerance sensitivity, good high-low temperature stability and the like, and can monitor the external scene more comprehensively;
2. By reasonably matching each optical lens, the system has compact and reasonable structure, easy assembly and low tolerance sensitivity, and is more suitable for large-scale high-yield production;
3. The full glass structure is adopted, so that the high-stability glass has high stability and can adapt to severe environments;
4. The displacement of the focusing surface can be well compensated at high temperature and low temperature, and the complex environment adaptability is realized;
5. The axial chromatic aberration, vertical chromatic aberration and high-order chromatic aberration are corrected, and the imaging system can have higher imaging quality at a large angle.
The utility model will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic view of the optical structure of embodiment 1 of the present utility model;
FIG. 2 is a graph of the axial chromatic aberration of the full operational band for example 1 of the present utility model;
FIG. 3 is a vertical axis color difference chart of the full operating band of example 1 of the present utility model;
FIG. 4 is a graph of the distortion of the full working wave Duan Changqu of example 1 of the present utility model;
FIG. 5 is a schematic view showing an optical structure of embodiment 2 of the present utility model;
FIG. 6 is a graph of the axial chromatic aberration of the full operational band for example 2 of the present utility model;
FIG. 7 is a vertical axis color difference chart of the full operating band of example 2 of the present utility model;
FIG. 8 is a graph of the distortion of the full working wave Duan Changqu of example 2 of the present utility model;
In the figure: STO-diaphragm; l1-a first lens; l2-a second lens; l3-a third lens; l4-fourth lens; l5-fifth lens; l6-sixth lens; l7-seventh lens; l8-equivalent glass plate; l9-equivalent glass plate; IMA-imaging plane.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless defined otherwise, all 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 is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 to 8, the present embodiment provides an 8M vehicle-mounted front-view main camera, where an optical system of a lens is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens sequentially arranged from left to right along a light incident path; the first lens is a meniscus concave negative lens, the second lens is a meniscus concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a negative lens, and the sixth lens is a biconvex positive lens.
The driving visual perception and recognition functions are realized, meanwhile, 8MP imaging is realized, so that the front-view wide-angle camera and the front-view narrow-angle camera can be replaced, a front-view camera module is formed by a single lens, the cost is greatly reduced, and the market popularity is improved. The overall length of the lens and the radial dimension of each lens are reduced by reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like, so that the miniaturization of the lens group is realized.
In the embodiment of the utility model, the focal length of the optical system is set to be f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are respectively set to be f 1、f2、f3、f4、f5、f6、f7, wherein f 1、f2、f3、f4、f5、f6、f7 and f satisfy the following ratio ：-2.5<f1/f<-1.5,-5.0<f2/f<-3.0,2.0<f3/f<2.5,1.5<f4/f<2.0,-1.5<f5/f<-1.0,1.5<f6/f<3.0,-8.0<f7/f<122.0.
In the embodiment of the present utility model, the first lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the second lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the third lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the fourth lens satisfies the relation: n d≤1.8,Vd is more than or equal to 1.5 and is more than or equal to 50.0; the fifth lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the sixth lens satisfies the relation: n d≤1.8,Vd is more than or equal to 1.5 and is more than or equal to 50.0; the seventh lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; where N d is the refractive index and V d is the Abbe's constant.
In the embodiment of the utility model, the lenses are made of glass materials, and the fourth lens and the fifth lens are cemented lens groups.
In an embodiment of the present utility model, the on-axis distance between the lenses satisfies the following relationship, and the air gap between the first lens and the second lens is: 4.0-5.0 mm; the air interval between the second lens and the third lens is as follows: 0.1-0.5 mm; the air interval between the third lens and the diaphragm is as follows: 2.0-2.5 mm; the air interval between the diaphragm and the fourth lens is: 0.5-1.0 mm; the fourth lens and the fifth lens are a cemented lens group, and the air interval is 0mm; air separation of the fifth lens from the sixth lens: 0.1-0.5 mm; the air interval between the sixth lens and the seventh lens is as follows: 0.1-1.0 mm. Under the condition of meeting imaging requirements, the distance between lenses is reduced, and the total optical length of the lens is facilitated.
In the embodiment of the present utility model, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 7.5.
In the embodiment of the utility model, the F number of the optical system is less than or equal to 1.5.
In the embodiment of the utility model, the image height H of the optical system and the focal length f of the optical system satisfy: h/f is more than or equal to 1.0.
In an embodiment of the present utility model, a filter is disposed at a rear side of the seventh lens.
An imaging method of an 8M vehicle-mounted front-view main camera is carried out according to the following steps: the optical system of the lens sequentially passes through the first lens, the second lens, the third lens, the diaphragm, the fourth lens, the fifth lens, the sixth lens and the seventh lens for imaging.
The specific implementation process comprises the following steps: first embodiment:
The optical lens is sequentially provided with a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an image side. The first lens and the second lens are glass spherical lenses with negative focal power, large-angle light rays are adjusted, and the second lens and the seventh lens are glass aspheric surfaces, so that the distortion of an optical system is reduced. The fourth lens and the fifth lens form an achromatic double-cemented lens. The reasonable lens collocation ensures that the optical system realizes 8M, ultra-wide angle, large aperture, day-night confocal and low-temperature drift design, and simultaneously well corrects on-axis and off-axis aberration, thereby having better imaging quality, as shown in figures 2 to 4.
The first lens is a meniscus concave-convex lens, the object side surface is a convex surface, and the image side surface is a concave surface;
the second lens is a meniscus concave negative lens, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
the third lens is a biconvex positive lens, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
the fourth lens is a biconvex positive lens, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface;
The fifth lens is a meniscus concave negative lens, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface;
the sixth lens is a biconvex positive lens, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface;
the seventh lens is a meniscus concave positive lens, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface;
the technical indexes of the optical system implementation of the embodiment are as follows:
(1) Focal length: EFFL mm or more and 4.0mm or less;
(2) F is less than or equal to 1.5;
(3) Angle of view: 2w is more than or equal to 140 degrees;
(4) Working wave band: visible light band.
In order to achieve the above design parameters, the specific designs adopted by the optical system of this embodiment are shown in the following table:
The aspherical coefficients of the respective aspherical lenses of the optical system of the present embodiment are as follows:
The aspherical curve equation expression is:
Wherein Z is the altitude of the aspheric surface from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; alpha 1、α2、α3、α4、α5、α6、α7、α8 is the higher order term coefficient.
The optical system of the embodiment reasonably distributes the focal power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like, so that the total length of the lens and the radial dimension of each lens are reduced while the imaging performance requirement of the lens 8M is met, and the miniaturization of the lens group is realized.
Second embodiment:
The optical lens is sequentially provided with a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an image side. The first lens and the second lens are glass spherical lenses with negative focal power, large-angle light rays are adjusted, and the second lens, the third lens, the sixth lens and the seventh lens are glass aspheric surfaces, so that the aberration of an optical system is reduced. The fourth lens and the fifth lens form an achromatic double-cemented lens. The reasonable lens collocation ensures that the optical system realizes 8M, ultra-wide angle, large aperture, day-night confocal and low-temperature drift design, and simultaneously well corrects on-axis and off-axis aberration, thereby having better imaging quality, as shown in figures 6 to 8.
The first lens is a meniscus concave-convex lens, the object side surface is a convex surface, and the image side surface is a concave surface;
the second lens is a meniscus concave negative lens, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
the third lens is a biconvex positive lens, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
the fourth lens is a biconvex positive lens, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface;
the fifth lens is a biconcave negative lens, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a concave surface;
the sixth lens is a biconvex positive lens, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface;
The seventh lens is a meniscus concave-convex lens, the object side surface is a convex surface, and the image side surface is a concave surface;
the technical indexes of the optical system implementation of the embodiment are as follows:
(5) Focal length: EFFL mm or more and 4.0mm or less;
(6) F is less than or equal to 1.5;
(7) Angle of view: 2w is more than or equal to 140 degrees;
(8) Working wave band: visible light band.
In order to achieve the above design parameters, the specific designs adopted by the optical system of this embodiment are shown in the following table:
The aspherical coefficients of the respective aspherical lenses of the optical system of the present embodiment are as follows:
The aspherical curve equation expression is:
Wherein Z is the altitude of the aspheric surface from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; alpha 1、α2、α3、α4、α5、α6、α7、α8 is the higher order term coefficient.
The optical system of the embodiment reasonably distributes the focal power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like, so that the total length of the lens and the radial dimension of each lens are reduced while the imaging performance requirement of the lens 8M is met, and the miniaturization of the lens group is realized.
The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims (9)
1. An on-vehicle front-view main camera of 8M, its characterized in that: the optical system of the lens consists of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus concave negative lens, the second lens is a meniscus concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a negative lens, and the sixth lens is a biconvex positive lens.
2. The 8M vehicle mounted front view main camera of claim 1, wherein: setting the focal length of the optical system as f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are respectively f 1、f2、f3、f4、f5、f6、f7, wherein f 1、f2、f3、f4、f5、f6、f7 and f satisfy the following proportion ：-2.5<f1/f<-1.5,-5.0<f2/f<-3.0,2.0<f3/f<2.5,1.5<f4/f<2.0,-1.5<f5/f<-1.0,1.5<f6/f<3.0,
-8.0<f7/f<122.0。
3. The 8M vehicle mounted front view main camera of claim 1, wherein: the first lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the second lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the third lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the fourth lens satisfies the relation: n d≤1.8,Vd is more than or equal to 1.5 and is more than or equal to 50.0; the fifth lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; the sixth lens satisfies the relation: n d≤1.8,Vd is more than or equal to 1.5 and is more than or equal to 50.0; the seventh lens satisfies the relation: n d≤2.0,Vd is more than or equal to 1.7 and less than or equal to 50.0; where N d is the refractive index and V d is the Abbe's constant.
4. The 8M vehicle mounted front view main camera of claim 1, wherein: the lens is made of glass material, and the fourth lens and the fifth lens are cemented lens groups.
5. The 8M vehicle mounted front view main camera of claim 1, wherein: the on-axis distance between the lenses satisfies the following relationship, the air spacing between the first lens and the second lens being: 4.0-5.0 mm; the air interval between the second lens and the third lens is as follows: 0.1-0.5 mm; the air interval between the third lens and the diaphragm is as follows: 2.0-2.5 mm; the air interval between the diaphragm and the fourth lens is: 0.5-1.0 mm; the fourth lens and the fifth lens are a cemented lens group, and the air interval is 0mm; air separation of the fifth lens from the sixth lens: 0.1-0.5 mm; the air interval between the sixth lens and the seventh lens is as follows: 0.1-1.0 mm.
6. The 8M vehicle mounted front view main camera of claim 1, wherein: the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 7.5.
7. The 8M vehicle mounted front view main camera of claim 1, wherein: the F number of the optical system is less than or equal to 1.5.
8. The 8M vehicle mounted front view main camera of claim 1, wherein: the image height H of the optical system and the focal length f of the optical system satisfy the following conditions: h/f is more than or equal to 1.0.
9. The 8M vehicle mounted front view main camera of claim 1, wherein: the rear side of the seventh lens is provided with a filter.
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