CN210666169U

CN210666169U - An ultra-wide-angle, high-brightness, high-resolution, ultra-short optical path vehicle lens

Info

Publication number: CN210666169U
Application number: CN201921625141.7U
Authority: CN
Inventors: 乔士琪; 孙仲辉
Original assignee: Ningbo Jinhui Optical Technology Co ltd
Current assignee: Ningbo Jinhui Optical Technology Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-06-02
Anticipated expiration: 2029-09-27

Abstract

The utility model relates to an ultra-wide-angle, high-brightness, high-resolution, ultra-short optical path vehicle-mounted lens, which comprises the following steps from an object to an image along an optical axis: a first concave lens with negative refractive power; and a second concave lens with negative refractive power; First convex lens with positive power; second convex lens with positive power; third concave lens with negative power; diaphragm; third convex lens with positive power; fourth convex lens with positive power; Fourth concave lens with negative power. Among the beneficial effects of the present utility model: as can be seen from the above table, the decay rate of our vehicle-mounted lens 200mm is about 0.7, and it has very good anti-distortion performance and brightness and anti-distortion. Refraction can ensure that the light is precisely focused on one point, effectively eliminate various aberrations of the light, and ensure high-quality imaging.

Description

Ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens

Technical Field

The utility model relates to an improvement of on-vehicle camera lens.

Background

Cameras are a common photographic tool in modern life. Can be widely applied to the fields of building safety, automobiles and the like. In particular, in recent years, the demand for manufacturing technology of cameras has been increasing, and the overall quality of cameras has been more demanding. The existing automobiles are provided with an automatic driving auxiliary system, and the automatic driving function can be realized. In particular, a large number of sensors are installed in the auxiliary system of the automobile, and the system is dynamic within the first hour after the data of the environment inside and outside the automobile is collected. It knows the identification, detection and tracking of the target. The driver can find the danger of the automobile as soon as possible, and the comfort and the safety of the automobile are effectively improved. Currently, market demand is increasing. Corresponding measures are taken in China, Europe, the United states, Japan and other countries, the development of automobile propulsion technology is promoted, and the development of the automobile industry and key parts of automobile auxiliary systems is greatly promoted.

The resolution of the existing lens is low and is below 50 ten thousand; the field angle of the lens is less than 170 degrees, and under the condition of ultra-wide angle, the brightness and the resolution can not meet the requirements.

Disclosure of Invention

In order to overcome the low and little not enough of angle of field of resolution ratio of present camera lens, the utility model provides an on-vehicle camera lens of ultrashort optical path that the high angle of field of resolution ratio is big.

The technical proposal of the utility model for solving the technical problem is that: the utility model provides an on-vehicle camera lens of ultrashort optical distance of super wide angle hi-lite high resolution, includes from the thing to like along the optical axis in proper order:

comprises a first concave lens having a negative optical power;

a second concave lens having a negative optical power;

a first convex lens having a positive optical power;

a second convex lens having positive optical power;

a third concave lens having a negative optical power;

a diaphragm;

a third convex lens having positive optical power;

a fourth convex lens having positive optical power;

a fourth concave lens having a negative optical power.

Further, in the present invention,

the first concave lens adopts a concave lens which has negative focal power and is convex to the object space, and a meniscus lens is adopted;

the second concave lens adopts a single-sided concave lens with negative focal power;

the first convex lens adopts a single-sided convex lens with positive focal power convex to the image space;

the second convex lens is a double-sided convex lens with positive focal power;

the third concave lens is a double-sided concave lens with negative focal power;

the third convex lens is a double-sided convex lens with positive focal power;

the fourth convex lens adopts a double-sided convex lens with positive focal power;

the fourth concave lens is a single-sided concave lens with negative focal power and concave object direction.

Further, in the present invention,

the diameter ratio of the first concave lens to the second concave lens satisfies the following relation:

0.3 < phi 1/phi 2 < 1; phi 1 is the diameter of the first concave lens, phi 2 is the diameter of the second concave lens;

the diameter ratio of the first convex lens to the second convex lens satisfies the following relational expression:

phi 3/phi 4 is more than 0.45 and less than 0.65; phi 3 is the diameter of the first convex lens, phi 4 is the diameter of the second convex lens;

the diameter ratio of the third concave lens to the third convex lens satisfies the following relational expression:

phi 5/phi 6 is more than-1.85 and less than-1.65; where phi 5 is the diameter of the third concave lens and phi 6 is the diameter of the third convex lens.

The diameter ratio of the fourth concave lens to the fourth convex lens satisfies the following relational expression:

phi 7/phi 8 < -4 > is less than-5; where phi 7 is the diameter of the fourth concave lens and phi 8 is the diameter of the fourth convex lens.

Further, in the present invention,

the center thickness of the fourth concave lens satisfies the following relational formula:

0.65mm＜T07＜1.2mm；

the center thickness of the fourth convex lens satisfies the following relational formula:

0.5mm＜T08＜1.5mm。

further, in the present invention,

refractive index and dispersion of the fourth concave lens:

1.45＜n07＜1.6；

60＜v07＜66；

refractive index and dispersion of the fourth convex lens:

1.6＜n08＜1.7；

20＜v08＜25。

further, in the present invention,

the size of the image plane imaged by the lens meets the following requirements:

3.2mm＜H≤4.2mm。

further, the X lens is a non-standard mirror surface, and the spherical coefficient formula of the mirror surface is

Further, the front mirror surface of the first concave lens is a standard mirror surface in which the radius of curvature is 21.258mm and the center thickness is 0.5 mm;

the rear mirror surface of the first concave lens is a standard mirror surface, wherein the curvature radius is 3.281mm, and the center thickness is 2.439 mm;

the front mirror surface of the first convex lens is a standard mirror surface, wherein the curvature radius is-7.252 mm, and the center thickness is 3.919 mm;

the rear mirror surface of the first convex lens is a standard mirror surface with a radius of curvature of 4.884mm and a center thickness of 2.274 mm.

Further, the field angle 2 ω of the on-vehicle lens is 190 °, the Fno of the on-vehicle lens is 2.0, the resolving power is > 5M pixel, and the total optical length Ttl is < 19.6 mm.

Further, the total length l of the on-vehicle lens is 12.5 mm.

The utility model discloses with prior art's on-vehicle camera lens when using, no longer describe herein.

The beneficial effects of the utility model reside in that: 1. the number of lenses commonly used by a lens with a 180 ° field angle is 8, and i have 8 lenses to realize a 190 ° field angle. 2. The total length of the conventional optical vehicle-mounted lens with the field angle of 162 degrees is 13 mm, and I has already realized technical breakthrough smaller than 12.5mm, and the optical vehicle-mounted lens only adopts 8 lenses, so that the weight of the lens is reduced, the cost is reduced, the aberration in an optical system can be effectively corrected, satisfactory optical characteristics and a very wide total field angle are achieved, the aperture is large, the distortion is small, and meanwhile, the total length TTL of the lens is close to 19.6mm, so that the special application requirements of a built-in vehicle-mounted camera are met.

Drawings

Fig. 1 is a schematic view of lens arrangement according to the present invention.

Fig. 2 is a schematic view of the lens arrangement with optical path according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Example 1

With reference to fig. 1 to 2, an ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens sequentially comprises along an optical axis from an object to an image:

comprises that

The first concave lens 1 adopts a concave lens which has negative focal power and is convex to the object space, and adopts a meniscus lens;

the second concave lens 2 adopts a single-sided concave lens with negative focal power;

the first convex lens 3 adopts a single-sided convex lens with positive focal power convex to the image side;

the second convex lens 4 adopts a double-sided convex lens with positive focal power;

the third concave lens 5 adopts a double-sided concave lens with negative focal power;

a diaphragm 6;

the third convex lens 7 adopts a biconvex lens with positive focal power;

the fourth convex lens 8 adopts a biconvex lens with positive focal power;

the fourth concave lens 9 is a single-sided concave lens having a negative power and a concave object side.

The diameter ratio of the first concave lens 1 to the second concave lens 2 satisfies the following relation:

0.3 < phi 1/phi 2 < 1; phi 1 is the diameter of the first concave lens 1, and phi 2 is the diameter of the second concave lens 2;

the diameter ratio of the first convex lens 3 to the second convex lens 4 satisfies the following relation:

phi 3/phi 4 is more than 0.45 and less than 0.65; phi 3 is the diameter of the first convex lens 3, phi 4 is the diameter of the second convex lens 4;

the diameter ratio of the third concave lens 5 to the third convex lens 7 satisfies the following relation:

phi 5/phi 6 is more than-1.85 and less than-1.65; where phi 5 is the diameter of the third concave lens 5 and phi 6 is the diameter of the third convex lens 7.

The diameter ratio of the fourth concave lens 9 to the fourth convex lens 8 satisfies the following relation:

phi 7/phi 8 < -4 > is less than-5; where phi 7 is the diameter of the fourth concave lens 9 and phi 8 is the diameter of the fourth convex lens 8.

The center thickness of the fourth concave lens 9 satisfies the following relational formula:

0.65mm＜T07＜1.2mm；

the center thickness of the fourth convex lens 8 satisfies the following relational formula:

0.5mm＜T08＜1.5mm。

refractive index and dispersion of the fourth concave lens 9:

1.45＜n07＜1.6；

60＜v07＜66；

refractive index and dispersion of the fourth convex lens 8:

1.6＜n08＜1.7；

20＜v08＜25。

3.2mm＜H≤4.2mm。

further, the second concave lens 2, the second convex lens 4, the third concave lens 5, the third convex lens 7, the fourth convex lens 8 and the fourth concave lens 9 are non-standard spherical surfaces, and the spherical coefficient formula of the mirror surface is

Further, the front mirror surface of the first concave lens 1 is a standard mirror surface in which the radius of curvature is 21.258mm and the center thickness is 0.5 mm;

the rear mirror surface of the first concave lens 1 is a standard mirror surface in which the radius of curvature is 3.281mm and the center thickness is 2.439 mm;

the front mirror surface of the first convex lens 3 is a standard mirror surface, wherein the curvature radius is-7.252 mm, and the center thickness is 3.919 mm;

the rear mirror surface of the first convex lens 3 is a standard mirror surface in which the radius of curvature is 4.884mm and the center thickness is 2.274 mm.

Further, the total length l of the on-vehicle lens is 12.5 mm.

Table 1: surface type of lens and related parameters

Table 2: 400 mm MTF plot

Table 3: 200mm MTF graph

Table 4: dot array diagram

Table 5: illuminance map

The beneficial effects of the utility model are that: 1. the above table shows that the 200mm decay rate of the vehicle-mounted lens is about 0.7, the vehicle-mounted lens has very good distortion resistance and brightness distortion resistance, and the aspheric lens is adopted to enable light rays to be refracted by a high-order curved surface, so that the light rays can be accurately focused on one point, various aberrations of the light rays can be effectively eliminated, and the high quality of imaging is ensured. 2. The number of lenses commonly used by a lens with a 180 ° field angle is 8, and i have 8 lenses to realize a 190 ° field angle. 3. The total length of the conventional optical vehicle-mounted lens with the field angle of 162 degrees is 13 mm, and I has already realized technical breakthrough smaller than 12.5mm, and the optical vehicle-mounted lens only adopts 8 lenses, so that the weight of the lens is reduced, the cost is reduced, the aberration in an optical system can be effectively corrected, satisfactory optical characteristics and a very wide total field angle are achieved, the aperture is large, the distortion is small, and meanwhile, the total length TTL of the lens is close to 19.6mm, so that the special application requirements of a built-in vehicle-mounted camera are met.

Claims

1. an ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens is characterized in that: along the optical axis from the object to the image, it includes successively:

comprising a first concave lens having a negative optical power;

a second concave lens with negative refractive power;

a first convex lens having positive refractive power;

a second convex lens having positive refractive power;

a third concave lens with negative refractive power;

aperture;

a third convex lens with positive refractive power;

a fourth convex lens with positive refractive power;

Fourth concave lens with negative power.

2. ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens according to claim 1, is characterized in that:

The first concave lens adopts a concave lens with negative refractive power and is convex toward the object, and adopts a meniscus lens;

The second concave lens adopts a single-sided concave lens with negative refractive power;

The first convex lens adopts a single-sided convex lens with positive refractive power convex toward the image side;

The second convex lens adopts a double convex lens with positive refractive power;

The third concave lens adopts a double-sided concave lens with negative refractive power;

The third convex lens adopts a double convex lens with positive refractive power;

The fourth convex lens adopts a double-sided convex lens with positive refractive power;

The fourth concave lens is a single-sided concave lens with negative refractive power concave toward the object.

3. ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens according to claim 2, is characterized in that:

The diameter ratio of the first concave lens and the second concave lens satisfies the following relationship:

0.3<ф1/ф2<1; where ф1 is the diameter of the first concave lens, and ф2 is the diameter of the second concave lens;

The diameter ratio of the first convex lens to the second convex lens satisfies the following relationship:

0.45<ф3/ф4<0.65; where ф3 is the diameter of the first convex lens, and ф4 is the diameter of the second convex lens;

The diameter ratio of the third concave lens to the third convex lens satisfies the following relationship:

-1.85<ф5/ф6<-1.65; where ф5 is the diameter of the third concave lens, and ф6 is the diameter of the third convex lens;

The diameter ratio of the fourth concave lens to the fourth convex lens satisfies the following relationship:

-5<ф7/ф8<-4; where ф7 is the diameter of the fourth concave lens and ф8 is the diameter of the fourth convex lens.

4. ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens according to claim 2, is characterized in that:

0.65mm＜T ₀₇ ＜1.2mm;

0.5mm<T ₀₈ <1.5mm.

5. ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens according to claim 2, is characterized in that:

Refractive index and dispersion of the fourth concave lens:

1.45<n ₀₇ <1.6;

60 < v ₀₇ <66;

Refractive index and dispersion of the fourth convex lens:

1.6 <n ₀₈ <1.7;

20<v ₀₈ <25.

6. ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens according to claim 2, is characterized in that:

The image size of the lens imaging meets:

3.2mm<H≤4.2mm.

7. ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens according to claim 2, is characterized in that:

The second concave lens and the second convex lens are non-standard mirror surfaces, the third concave lens, the third convex lens, the fourth convex lens and the fourth concave lens are non-standard spherical surfaces, and the spherical coefficient formula of the mirror surface is:

8. ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens according to claim 2, is characterized in that:

The front mirror surface of the first concave lens is a standard mirror surface, wherein the radius of curvature is 21.258mm, and the center thickness is 0.5mm;

The rear mirror surface of the first concave lens is a standard mirror surface, wherein the radius of curvature is 3.281mm, and the central thickness is 2.439mm;

The front mirror surface of the first convex lens is a standard mirror surface, wherein the radius of curvature is -7.252mm, and the central thickness is 3.919mm;

The rear mirror surface of the first convex lens is a standard mirror surface, wherein the radius of curvature is 4.884mm, and the central thickness is 2.274mm.

9. ultra-wide-angle high-brightness high-resolution ultra-short optical path vehicle-mounted lens according to claim 1, is characterized in that:

The field of view 2ω of the vehicle lens is 190°, the Fno=2.0 of the ultra-wide-angle, high-brightness, high-resolution, ultra-short optical path vehicle lens, the resolution > 5M pixel, and the total optical length Ttl < 19.6 mm.

10. The ultra-wide-angle, high-brightness, high-resolution, ultra-short optical path vehicle-mounted lens according to claim 1, characterized in that:

The total length l of the vehicle lens is 12.5mm.