CN215575743U

CN215575743U - Laser radar composite optical window

Info

Publication number: CN215575743U
Application number: CN202121170583.4U
Authority: CN
Inventors: 潘敏忠; 陈宇光; 魏孝典; 章学堤; 许德
Original assignee: Fujian Fulan Optics Co Ltd
Current assignee: Fujian Fulan Optics Co Ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-01-18
Anticipated expiration: 2031-05-28

Abstract

The utility model provides a laser radar composite optical window which comprises first optical glass, wherein a first AR (anti-reflection) film and an AF (anti-reflection) super-hydrophobic film are arranged on the outer surface of the first optical glass in an attaching mode from inside to outside, and a conductive film, a silver paste circuit, a delustering film, first optical cement, plastic and a second AR (anti-reflection) film are sequentially arranged on the inner surface of the first optical glass from inside to outside; the utility model has the advantages of simple structure, convenient operation, strong permeability increasing and good optical performance.

Description

Laser radar composite optical window

Technical Field

The utility model relates to the technical field of composite optical windows, in particular to a laser radar composite optical window.

Background

Laser radar is mainly used for object signal detection, and is widely used in the fields of robots, unmanned driving, AR/VR, 3D printing and other industries. Infrared laser radar protection window is as one of them component part of laser radar, generally at laser radar's outmost, mainly plays the protection laser radar internals and does not receive external environment influence, participates in optical imaging simultaneously, belongs to an important optical component of laser radar. The existing laser radar protection window is made of pure infrared transparent material, generally infrared plastic or black glass. The infrared plastic scheme has the following defects: the surface strength is insufficient, the optical fiber is easily scratched by foreign objects, large optical distortion exists, the optical performance is influenced, and the detection precision is insufficient. The black glass solution has the following drawbacks: poor impact resistance, easy crushing, high manufacturing cost and no environmental protection. When the laser radar is used outdoors or in a severe indoor environment (such as a place with a large amount of dust, a low-temperature freezing place and the like), the existing radar protection window is difficult to meet the long-term use requirement.

Disclosure of Invention

Accordingly, the present invention is directed to a laser radar composite optical window that solves the above-mentioned problems.

The utility model is realized by adopting the following method: a laser radar composite optical window comprises first optical glass, wherein a first AR (anti-reflection) film and an AF (anti-reflection) super-hydrophobic film are arranged on the outer surface of the first optical glass in an attaching mode from inside to outside, and a conductive film, a silver paste circuit, a delustering film, first optical cement, plastic and a second AR anti-reflection film are sequentially arranged on the inner surface of the first optical glass from inside to outside.

Further, the conductive film, the silver paste circuit and the extinction film are sequentially arranged from top to bottom, the silver paste circuit is annularly arranged on the lower surface of the conductive film, and the extinction film is arranged on the lower surface of the silver paste circuit; the silver paste circuit is bonded on the conductive film through a second optical adhesive, and the extinction film is bonded on the silver paste circuit through a third optical adhesive.

Furthermore, a fourth optical adhesive and a second optical glass are arranged between the plastic and the second AR antireflection film from top to bottom.

Further, the first optical glass and the second optical glass are in the shape of a plane, a spherical surface, a cylindrical surface or a compound curved surface.

Furthermore, the shape of the plastic is a plane, a spherical surface, a cylindrical surface or a compound curved surface.

The utility model has the beneficial effects that: 1. according to the utility model, the first AR antireflection film and the second AR antireflection film are added into the device, and meanwhile, the device is made of infrared plastic, so that visible light is absorbed, the purpose that a laser radar protection window does not reflect light is achieved, the infrared light transmittance can be improved, and the optical performance is improved; 2. the optical glass and the plastic are laminated in a composite mode, and the optical glass and the plastic are bonded through the optical cement, so that the plastic transmission wavefront distortion can be reduced to the maximum extent, and the detection precision of the laser radar is improved; 3. the optical glass and the plastic are compounded and laminated, so that the advantages of the optical glass and the plastic material can be fully utilized to combine, and the scratch resistance and the friction resistance of the outer surface are achieved while the integral impact strength is ensured; the optical glass is bonded with the plastic through the optical cement, when the optical glass is impacted by external strong force, the optical glass cannot splash after being broken, and secondary damage is avoided. 4. The defrosting, deicing and demisting functions can be achieved by adding the conductive film, the silver paste circuit and the extinction film on the inner surface of the optical glass; 5. the anti-fouling and anti-fingerprint effects are achieved by plating a super-hydrophobic or super-hydrophilic film layer on the outer surface of the glass.

Drawings

Fig. 1 is a block diagram schematically illustrating the structure of the first embodiment of the present invention.

Fig. 2 is a block diagram schematically illustrating the structure of a second embodiment of the present invention.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Referring to fig. 1, the present invention provides a first embodiment: a laser radar composite optical window comprises first optical glass 1, wherein a first AR (anti-reflection) film 2 and an AF (anti-reflection) super-hydrophobic film 3 are arranged on the outer surface of the first optical glass 1 in a sticking mode from inside to outside, and a conductive film 4, a silver paste circuit 5, a delustering film 6, first optical cement 7, plastic cement 8 and a second AR anti-reflection film 9 are sequentially arranged on the inner surface of the first optical glass 1 from inside to outside. Under the action of the composite lamination, the light can pass through the first AR antireflection film 2 and the second AR antireflection film 9, and meanwhile, the infrared plastic is adopted to absorb visible light, so that the laser radar protection window is not reflected, the infrared light transmittance can be improved, and the optical performance is improved; through the action of the first optical adhesive 7, the first optical glass 1 and the plastic 8, the transmitted wavefront distortion of the plastic 8 can be reduced to the maximum extent, the detection precision of the laser radar is improved, the advantages of the glass and the plastic material can be fully utilized to be combined, and the scratch resistance and the friction resistance of the outer surface are achieved while the integral impact strength is ensured; and through the cooperation of conducting film 4, silver thick liquid circuit 5 and extinction membrane 6, can reach defrosting deicing defogging function, through AF super hydrophobic membrane 3 at last, can reach antifouling fingerprint effect of preventing.

The contact angle of the AF super-hydrophobic film is larger than 115 degrees, the infrared and visible light transmittance of the first AR antireflection film and the second AR antireflection film is improved, the light transmittance is 905 nm and 1535nm, the incident angle is 0 degree, and the R is smaller than 0.5 percent; the incident angle is 60 degrees, and R is less than 2.8 percent. (ii) a The conducting film is 20 omega/□ < sheet resistance < 100 omega/□; the silver paste surface of the silver paste circuit needs extinction, the resistance of the silver paste is less than 1 omega, and the width is 2-3 mm; the extinction film is used for reducing the reflectivity of silver paste and is 3-4 mm.

With reference to fig. 1 and fig. 2, in an embodiment of the present invention, the conductive film 4, the silver paste circuit 5, and the extinction film 6 are sequentially disposed from top to bottom, the silver paste circuit 5 is annularly disposed on the lower surface of the conductive film 4, and the extinction film 6 is disposed on the lower surface of the silver paste circuit 5; the silver paste circuit 5 is bonded to the conductive film 4 through a second optical adhesive 10, and the extinction film 6 is bonded to the silver paste circuit 5 through a third optical adhesive 11. The conductive film 4, the silver paste circuit 5 and the extinction film 6 are matched, so that the defrosting and deicing functions can be achieved; and the reflectivity of the silver paste can be reduced through the extinction film 6.

Referring to fig. 2, the present invention provides a second embodiment: and a fourth optical adhesive 12 and second optical glass 13 are arranged between the plastic 8 and the second AR antireflection film 9 from top to bottom. The second optical glass 13 is attached to the plastic 8 under the action of the fourth optical cement 12, so that the transmitted wavefront distortion of the plastic 8 can be reduced to the maximum extent, the detection precision of the laser radar is improved, and the scratch and friction resistance of the outer surface is achieved while the integral impact strength is ensured.

The first optical glass 1 and the second optical glass 13 are in the shape of a plane, a spherical surface, a cylindrical surface or a compound curved surface.

The shape of the plastic 8 is a plane, a spherical surface, a cylindrical surface or a compound curved surface.

In the present invention, vacuum coating is preferably used, but not limited thereto.

In a word, the laser radar protection window can absorb visible light through the action of the first AR antireflection film and the second AR antireflection film, so that the laser radar protection window is not reflective, the infrared light transmittance can be improved, the optical performance is improved, the first optical glass, the second optical glass and the plastic can be bonded through the composite lamination of the first optical glass, the second optical glass and the plastic through the action of the first optical glue and the second optical glue, the plastic transmission wavefront distortion is reduced to the maximum extent, and the laser radar detection precision is improved; and the inner surface of the optical glass is additionally provided with the conductive film, the silver paste circuit and the extinction film, so that the defrosting, deicing and demisting functions are achieved.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims

1. A laser radar composite optical window comprises a first optical glass, and is characterized in that: the outer surface of the first optical glass is provided with a first AR anti-reflection film and an AF super-hydrophobic film in an attaching mode from inside to outside, and the inner surface of the first optical glass is sequentially provided with a conductive film, a silver paste circuit, a delustering film, first optical cement, plastic and a second AR anti-reflection film from inside to outside.

2. The lidar composite optical window of claim 1, wherein: the conductive film, the silver paste circuit and the extinction film are sequentially arranged from top to bottom, the silver paste circuit is annularly arranged on the lower surface of the conductive film, and the extinction film is arranged on the lower surface of the silver paste circuit; the silver paste circuit is bonded on the conductive film through a second optical adhesive, and the extinction film is bonded on the silver paste circuit through a third optical adhesive.

3. The lidar composite optical window of claim 1, wherein: and a fourth optical adhesive and second optical glass are arranged between the plastic and the second AR antireflection film from top to bottom.

4. A lidar composite optical window according to claim 1 or 3, wherein: the first optical glass and the second optical glass are in the shape of a plane, a spherical surface, a cylindrical surface or a compound curved surface.

5. The lidar composite optical window of claim 1, wherein: the shape of the plastic is a plane, a spherical surface, a cylindrical surface or a composite curved surface.