CN209765131U - low-distortion vehicle-mounted rearview mirror head - Google Patents

Abstract

the utility model discloses an on-vehicle rear-view mirror head of low distortion, including the camera lens body, the camera lens body includes lens cone, lens, first space ring, second space ring, clamping ring, diaphragm hole, chip protection glass and camera lens imaging surface, the inside of lens cone is provided with lens, first space ring, second space ring, clamping ring, diaphragm hole and chip protection glass, the lens includes first lens, second lens, third lens, fourth lens, fifth lens and sixth lens, first lens, second lens, third lens, fourth lens, fifth lens and sixth lens set gradually by thing side to imaging side in the lens cone. The utility model discloses a can effectively avoid the production of ghost, improve the imaging quality of camera lens in the highlight environment, optimize the structural design of camera lens, increase camera lens angle of vision on the one hand, on the other hand makes the structure of camera lens simple relatively, even if it is overcast and rainy, night, its imaging quality also can effectively be guaranteed.

Description

low-distortion vehicle-mounted rearview mirror head

Technical Field

the utility model relates to an on-vehicle imaging technology field specifically is an on-vehicle rear-view mirror head of low distortion.

background

Receiving high-end car intelligent influence, artificial intelligence, communication and sensing technology's continuous development, we are more near again apart from realizing automatic driving, no matter be scientific and technological enterprise, still traditional car factory all begins to invest in a large amount of research and development resources and promote full automation development, but before realizing automatic driving, the consumer will take the lead to the demand that ADAS (advanced driving assistance system) to the promotion of initiative safety demand.

Although the vehicle-mounted rear-view system is widely applied to various automobiles at present, a plurality of manufacturers exist. But the product quality is not uniform, and the industry does not have a specific judgment standard for clients to refer to. Therefore, products of a plurality of workshop companies are greatly popularized to the market, so that a plurality of clients cannot achieve the expected using effect after being installed.

Currently, competitive manufacturers of optical products in the market mainly include japanese luck, taiwan optical plant, etc., but the aperture of the product is generally small, and the resolution is only 30 ten thousand pixels (VGA level), so that only the first generation of vehicle-mounted lens is weak in expansibility and stability in practical application, and cannot be applied to a high-end imaging system. Further, the product cost of japan optics corporation is high, the market competition cost is weak, and taiwan lens quality is slightly poor.

However, the prior art has the following disadvantages:

1. The existing lens can generate ghost images when shooting under strong light;

2. The existing lens has a small aperture, and the quality of a picture shot in a dark light environment is poor, so that the existing lens is not suitable for all-weather use;

3. the existing lens field has a small wide angle and a small shooting range;

The reasons for the above disadvantages are:

(1) the lens of the camera is composed of a plurality of lenses, the lenses are made of materials such as glass or plastic, and if no special treatment is carried out, the surface of the lens can reflect about 5% of incident light. When strong light enters the lens, multiple reflections can be generated in each lens and the camera, so that a phenomenon seen in actual shooting is ghost;

(2) the lens is made into a large aperture and is limited by a plurality of factors, the larger the aperture is, the more complicated the lens is required for clear imaging, each lens structure has a limit aperture, the larger the aperture is, the more complicated the structure is, and the complicated structure brings a plurality of negative effects. Among them is the most influential: firstly, the loss caused by multiple reflections and secondly, the requirement on the assembly precision are very high.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a low distortion vehicle-mounted rear-view mirror head has solved current technique and can produce the ghost when shooting under the highlight, and the camera lens light ring is less, and the picture quality of shooing under the dim light environment is very poor, and unsuitable all-weather uses, and the camera lens field wide angle is little, problem that the shooting range is little.

(II) technical scheme

in order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a low distortion vehicle-mounted rearview mirror head, includes the camera lens body, its characterized in that: the lens body comprises a lens barrel, lenses, a first space ring, a second space ring, a pressing ring, a diaphragm hole, chip protective glass and a lens imaging surface, the lenses, the first space ring, the second space ring, the pressing ring, the diaphragm hole and the chip protective glass are arranged inside the lens barrel, the lenses comprise a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from an object side to an imaging side in the lens barrel, and the diaphragm hole is formed between the third lens and the fourth lens;

The object plane of the first lens is a spherical surface, the curvature radius of the object plane is 22.0526mm, the image plane of the first lens is a spherical surface, the curvature radius of the image plane of the first lens is 3.9205mm, the distance between the object plane of the first lens and the center vertex of the image plane of the lens body is 1.0000mm, the distance between the image plane of the first lens and the center vertex of the object plane of the second lens is 2.1954mm, the center thickness of the first lens is 1.0000mm, the refractive index is 1.77250, and the Abbe number is 49.60;

The object plane of the second lens is a spherical surface, the curvature radius of the object plane is 21.5330mm, the image plane of the fourth lens is a spherical surface, the curvature radius of the image plane is 4.1418mm, the distance between the object plane of the second lens and the center vertex of the image plane of the second lens is 1.0000mm, the distance between the image plane of the second lens and the center vertex of the object plane of the third lens is 4.8214mm, the center thickness of the second lens is 0.5000mm, the refractive index is 1.56888, and the Abbe coefficient is 62.93;

The object plane of the third lens is a spherical surface, the curvature radius of the spherical surface is 6.7401mm, the image plane of the third lens is a spherical surface, the curvature radius of the spherical surface is 22.0526mm, the distance between the object plane of the third lens and the center vertex of the image plane of the third lens is 1.5000mm, the distance between the image plane of the third lens and the center vertex of the object plane of the fourth lens is 2.5085mm, the center thickness of the third lens is 1.0000mm, the refractive index is 1.83400, and the Abbe coefficient is 37.17;

The surface of the diaphragm hole is a diaphragm hole surface, the diaphragm hole is a virtual surface, the thickness is infinitesimal, and the distance from the surface of the diaphragm hole to the center vertex of the object plane of the fourth lens is 0.2480 mm;

The object plane of the fourth lens is a spherical surface, the curvature radius of the spherical surface is 7.9710mm, the image plane of the fourth lens is a spherical surface, the distance between the image plane of the fourth lens and the object plane of the fifth lens is 0, the curvature radii of the surfaces of the fourth lens and the fifth lens are the same, the center thickness of the fourth lens is 2.5000mm, the refractive index is 1.64000, and the Abbe coefficient is 60.20;

the curvature radius of an object plane of the fifth lens is-2.3000 mm, an image plane of the fifth lens is a spherical surface, the curvature radius of the fifth lens is 5.7925mm, the distance between the object plane of the fifth lens and the image plane of the fifth lens is 0.5000mm, the distance between the image plane of the fifth lens and the central vertex of the object plane of the sixth lens is 0.3000mm, the central thickness of the fifth lens is 0.5000mm, the refractive index is 1.84666, and the Abbe coefficient is 23.78;

The object plane of the sixth lens is a plane, the curvature radius of the plane is infinite, the distance from the vertex of the center of the image plane of the sixth lens is 1.0000mm, the image plane of the sixth lens is a plane, the curvature radius of the plane is infinite, namely the thickness of the center of the sixth lens is 1.0000mm, and the distance from the image plane of the sixth lens to the object plane of the chip protective glass is 3.115051 mm;

The object plane of chip protection glass is the plane, and its radius of curvature is infinity, chip protection glass's image plane is 90.118921mm apart from the camera lens imaging surface, chip protection glass's object plane is 0.400000mm apart from the center summit of chip protection glass's image plane, and chip protection glass's thickness is 0.400000mm promptly, and the refracting index is 1.516797, and the abbe coefficient is 62.212351.

Preferably, the lens barrel is made of a stainless steel material.

Preferably, the surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all plated with BBAR films.

Preferably, the focal length of the lens body is 14.98mm, and F/# ═ 1.8 aperture.

preferably, the full field angle of the lens body is 151 °.

preferably, the first space ring is arranged between the second lens and the third lens, the second space ring is arranged between the third lens and the fourth lens, the sixth lens is fixed in the lens barrel through the pressing ring, the chip protection glass is arranged at the rear end of the lens barrel, and the lens imaging surface is arranged at the rear end of the chip protection glass.

(III) advantageous effects

the utility model provides a low distortion vehicle-mounted rearview mirror head possesses following beneficial effect: the utility model discloses every optical lens piece all is done the coating of preventing light reflection and is handled, plates BBAR membrane in order to reduce the reverberation on the optical mirror surface, can effectively avoid the production of ghost, improves the imaging quality of camera lens in the highlight environment, has optimized the structural design of camera lens, increases the camera lens angle of vision on the one hand, and on the other hand makes the structure of camera lens simple relatively, even if it is overcast and rainy, night, its imaging quality also can effectively be guaranteed.

Drawings

FIG. 1 is an external view of the present invention

FIG. 2 is a view of the installation structure of the present invention;

fig. 3 is a schematic view of the optical principle of the lens of the present invention;

The reference numbers in the figures are: 1. a lens body; 2. a lens barrel; 3. a lens; 4. a first space ring; 5. a second space ring; 6. pressing a ring; 7. a diaphragm aperture; 8. chip protection glass; 9. a lens imaging surface; 10. a first lens; 11. a second lens; 12. a third lens; 13. a fourth lens; 14. a fifth lens; 15. and a sixth lens.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

as shown in fig. 1-3, the utility model provides a technical solution: the utility model provides a low distortion vehicle-mounted rearview mirror head, includes camera lens body 1, its characterized in that: the lens body 1 comprises a lens barrel 2, lenses 3, a first space ring 4, a second space ring 5, a pressing ring 6, a diaphragm hole 7, chip protection glass 8 and a lens imaging surface 9, the lenses 3, the first space ring 4, the second space ring 5, the pressing ring 6, the diaphragm hole 7 and the chip protection glass 8 are arranged inside the lens barrel 2, the lenses 3 comprise a first lens 10, a second lens 11, a third lens 12, a fourth lens 13, a fifth lens 14 and a sixth lens 15, the first lens 10, the second lens 11, the third lens 12, the fourth lens 13, the fifth lens 14 and the sixth lens 15 are sequentially arranged from an object side to an imaging side in the lens barrel 2, the diaphragm hole 7 is arranged between the third lens 12 and the fourth lens 13, the lens barrel 2 is made of a stainless steel material, specifically an aluminum material is used for lightening weight and improving strength of the lens, the first lens 10, the second lens 11, the third lens 12 and the chip protection glass 9, BBAR films are plated on the surfaces of the fourth lens 13, the fifth lens 14 and the sixth lens 15 to reduce reflected light, the focal length of the lens body 1 is 14.98mm, F/# ═ 1.8 aperture, the full field angle of the lens body 1 is 151 degrees, the aperture is large, the light flux can be increased, the depth of field is reduced, the picture is brighter, night scene shooting is facilitated, the first space ring 4 is arranged between the second lens 11 and the third lens 12, the second space ring 5 is arranged between the third lens 12 and the fourth lens 13, the sixth lens 15 is fixed in the lens barrel 2 through the pressing ring 6, the chip protection glass 8 is arranged at the rear end of the lens barrel 2, and the lens imaging surface 9 is arranged at the rear end of the chip protection glass 8.

the parameters of the monolithic lens simulated by the optical design software are as follows:

The detailed parameters of the design are listed in table 1, the first row lists the main parameters of the lens, focal length F2.5 mm, aperture F/#2.8 mm, total optical track length TTL 22.41251mm, and image height h 2.0mm at a full field angle of 151 °.

The title column of table 1 lists: "surface", "type", "radius of curvature", "thickness", "refractive index" and "Abbe's number". The lens element material is defined by a refractive index and an abbe number. In Table 1, a blank cell in the "refractive index" column indicates that the value in the "thickness" cell next to it is the distance to the next lens surface vertex. The "refractive index" column provides the refractive index of the lens material at 588 nm.

In table 1, the radius of curvature of the object plane is infinite, i.e., the plane, which is infinitely distant from the center vertex of the next surface (object plane of lens 1);

the surface 1 is an object surface of the lens 1, the surface is a spherical surface, the curvature radius is 22.0526mm, the distance from the center vertex of the next surface (the image surface of the lens 1) is 1.0000mm, namely the center thickness of the lens 1 is 1.0000mm, the refractive index is 1.77250, and the Abbe coefficient is 49.60;

The surface 2 is an image surface of the lens 1, the surface is a spherical surface, the curvature radius is 3.9205mm, and the distance from the next surface (an object surface of the lens 2) is 2.1954 mm;

the surface 3 is the object plane of the lens 2, the surface is a spherical surface, the curvature radius is 21.5330mm, the distance from the center vertex of the next surface (the image plane of the lens 2) is 1.0000mm, namely the center thickness of the lens 2 is 0.5000mm, the refractive index is 1.56888, and the Abbe coefficient is 62.93;

The surface 4 is an image surface of the lens 2, the surface is a spherical surface, the curvature radius is 4.1418mm, and the distance from the central vertex of the next surface (the object surface of the lens 3) is 4.8214 mm;

the surface 5 is the object plane of the lens 3, the surface is a spherical surface, the curvature radius is 6.7401mm, the distance from the central vertex of the next surface (the image plane of the lens 3) is 1.5000mm, namely the central thickness of the lens 3 is 1.0000mm, the refractive index is 1.83400, and the Abbe coefficient is 37.17;

The surface 6 is an image surface of the lens 3, the surface is a plane, the curvature radius is infinite, and the distance from the central vertex of the next surface (the diaphragm aperture surface) is 2.5085 mm;

the surface 7 is a diaphragm hole surface, the diaphragm hole is a virtual surface, the thickness is infinitesimal and the distance from the central vertex of the next lens surface (the object surface of the lens 4) is 0.2480 mm;

The surface 8 is the object plane of the lens 4, the surface is a spherical surface, the curvature radius is 7.9710mm, the distance from the central vertex 2.5000mm of the next surface (the image plane of the lens 4 or the object plane of the lens 5) is 2.5000mm, namely the central thickness of the lens 4 is 2.5000mm, the refractive index is 1.64000, and the Abbe coefficient is 60.20;

the surface 9 is an image surface of the lens 4, and because the distance between the surface and an object surface of the lens 5 is 0 and the curvature radius of the surface is the same, the surface 9 is not only the image surface of the lens 4 but also the object surface of the lens 5, the surface is a spherical surface, the curvature radius is-2.3000 mm, and the distance from the next surface (the image surface of the lens 5) is 0.5000mm, namely the central thickness of the lens 5 is 0.5000mm, the refractive index is 1.84666, and the Abbe coefficient is 23.78;

The surface 10 is the image surface of the lens 5, the surface is a spherical surface, the curvature radius is 5.7925mm, and the distance from the central vertex of the next surface (the object surface of the lens 6) is 0.3000 mm;

The surface 11 is the object surface of the lens 6, the surface is a plane, the curvature radius is infinite, the distance from the central vertex of the next surface (the image surface of the lens 6) is 1.0000mm, namely the central thickness of the lens 1 is 1.0000 mm;

the surface 12 is an image surface of the lens 6, the surface is a plane, the curvature radius is infinite, and the distance from the next surface (a chip protection glass object surface) is 3.115051 mm;

the surface 13 is a chip protection glass object surface, the surface is a plane, the curvature radius is infinite, the distance from the central vertex of the next surface (chip protection glass image surface) is 0.400000mm, namely the thickness of the chip protection glass is 0.400000mm, the refractive index is 1.516797, and the Abbe coefficient is 62.212351;

The surface 14 is the image surface of the lens 6, the surface is a plane, the curvature radius is infinite, and the distance from the next surface (a lens imaging surface) is 0.118921 mm;

the surface 15 is a lens imaging surface.

the resolution of the optical design was determined by the RPT-201 machine: a

center 160/160

first turn (Φ 1.9)160/160

Second turn (phi 2.6)125/125

third turn (phi 4.0)100/100

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a low distortion vehicle-mounted rearview mirror head, includes camera lens body (1), its characterized in that: the lens body (1) comprises a lens barrel (2), a lens (3), a first space ring (4), a second space ring (5), a pressing ring (6), a diaphragm hole (7), chip protective glass (8) and a lens imaging surface (9), the lens (3), the first space ring (4), the second space ring (5), the pressing ring (6), the diaphragm hole (7) and the chip protection glass (8) are arranged in the lens barrel (2), the lens (3) comprises a first lens (10), a second lens (11), a third lens (12), a fourth lens (13), a fifth lens (14) and a sixth lens (15), the first lens (10), the second lens (11), the third lens (12), the fourth lens (13), the fifth lens (14) and the sixth lens (15) are sequentially arranged from the object side to the imaging side in the lens barrel (2), a diaphragm hole (7) is arranged between the third lens (12) and the fourth lens (13);

The object plane of the first lens (10) is a spherical surface, the curvature radius of the first lens is 22.0526mm, the image plane of the first lens (10) is a spherical surface, the curvature radius of the first lens is 3.9205mm, the distance between the object plane of the first lens (10) and the center vertex of the image plane of the lens body (1) is 1.0000mm, the distance between the image plane of the first lens (10) and the center vertex of the object plane of the second lens (11) is 2.1954mm, the center thickness of the first lens (10) is 1.0000mm, the refractive index is 1.77250, and the Abbe coefficient is 49.60;

The object plane of the second lens is a spherical surface, the curvature radius of the object plane is 21.5330mm, the image plane of the fourth lens (13) is a spherical surface, the curvature radius of the image plane is 4.1418mm, the distance between the object plane of the second lens (11) and the center vertex of the image plane of the second lens (11) is 1.0000mm, the distance between the image plane of the second lens (11) and the center vertex of the object plane of the third lens (12) is 4.8214mm, the center thickness of the second lens (11) is 0.5000mm, the refractive index is 1.56888, and the Abbe coefficient is 62.93;

The object plane of the third lens (12) is a spherical surface, the curvature radius of the spherical surface is 6.7401mm, the image plane of the third lens (12) is a spherical surface, the curvature radius of the spherical surface is 22.0526mm, the distance between the object plane of the third lens (12) and the center vertex of the image plane of the third lens (12) is 1.5000mm, the distance between the image plane of the third lens (12) and the center vertex of the object plane of the fourth lens (13) is 2.5085mm, the center thickness of the third lens (12) is 1.0000mm, the refractive index is 1.83400, and the Abbe coefficient is 37.17;

the surface of the diaphragm hole (7) is a diaphragm hole surface, the diaphragm hole is a virtual surface, the thickness is infinitesimal and the distance from the central vertex of the object plane of the fourth lens (13) to the central vertex of the object plane is 0.2480 mm;

the object plane of the fourth lens (13) is a spherical surface, the curvature radius of the spherical surface is 7.9710mm, the image plane of the fourth lens (13) is a spherical surface, the distance between the image plane of the fourth lens (13) and the object plane of the fifth lens (14) is 0, the curvature radii of the surfaces of the fourth lens and the fifth lens are the same, the center thickness of the fourth lens (13) is 2.5000mm, the refractive index is 1.64000, and the Abbe coefficient is 60.20;

the curvature radius of an object plane of the fifth lens (14) is-2.3000 mm, the image plane of the fifth lens (14) is a spherical surface, the curvature radius of the image plane is 5.7925mm, the object plane of the fifth lens (14) is 0.5000mm away from the image plane of the fifth lens (14), the image plane of the fifth lens (14) is 0.3000mm away from the central vertex of the object plane of the sixth lens (15), the central thickness of the fifth lens (14) is 0.5000mm, the refractive index is 1.84666, and the Abbe coefficient is 23.78;

The object plane of the sixth lens (15) is a plane, the curvature radius of the sixth lens is infinite, the distance from the vertex of the center of the image plane of the sixth lens (15) is 1.0000mm, the image plane of the sixth lens (15) is a plane, the curvature radius of the sixth lens is infinite, namely the center thickness of the sixth lens (15) is 1.0000mm, and the distance from the image plane of the sixth lens (15) to the object plane of the chip protective glass (8) is 3.115051 mm;

The object plane of chip protection glass (8) is the plane, and its radius of curvature is infinity, the image plane of chip protection glass (8) is apart from camera lens imaging surface (9)0.118921mm, the object plane of chip protection glass (8) is apart from the central vertex 0.400000mm of the image plane of chip protection glass (8), and the thickness of chip protection glass (8) is 0.400000mm promptly, and the refracting index is 1.516797, and the abbe coefficient is 62.212351.

2. A low distortion vehicle rear-view mirror head according to claim 1, wherein: the lens barrel (2) is made of stainless steel materials.

3. a low distortion vehicle rear-view mirror head according to claim 1, wherein: BBAR films are plated on the surfaces of the first lens (10), the second lens (11), the third lens (12), the fourth lens (13), the fifth lens (14) and the sixth lens (15).

4. A low distortion vehicle rear-view mirror head according to claim 1, wherein: the focal length of the lens body (1) is 14.98mm, and F/# ═ 1.8 aperture.

5. a low distortion vehicle rear-view mirror head according to claim 1, wherein: the full field angle of the lens body (1) is 151 degrees.

6. A low distortion vehicle rear-view mirror head according to claim 1, wherein: the lens comprises a lens barrel (2), a first space ring (4), a second space ring (5), a pressing ring (6), a sixth lens (15), a chip protection glass (8), a lens imaging surface (9) and a third lens (11, 12), wherein the first space ring (4) is arranged between the second lens (11) and the third lens (12), the second space ring (5) is arranged between the third lens (12) and the fourth lens (13), the sixth lens (15) is fixed in the lens barrel (2) through the pressing ring (6), the chip protection glass (8) is arranged at the rear end of the lens barrel (2), and the lens imaging surface (9) is arranged.