Optical module and laser module

Abstract

The invention provides an optical module and a laser module, and belongs to the technical field of light spot superposition. The optical module comprises an array lens group and a wedge-shaped lens group which are sequentially arranged along a main optical axis, the array lens group comprises a first array lens and a second array lens which are sequentially arranged along a first direction perpendicular to the main optical axis, and the wedge-shaped lens group is arranged at the light emitting side of the first array lens and / or the second array lens. Laser beams form angular space flat-toppedlight spots with different beam angles through the array lens group, and the angular space flat-topped light spots are refracted by the wedge-shaped lens group and then form angular space superposedlight spots in a far field. By arranging the array lens group and the wedge-shaped lens group, and according to different change combinations of the array lens group and the wedge-shaped lens group, superposed light spots with different effects can be formed, the light spot forms are diversified, the flexibility is high, different requirements can be met; different light spot superposition is achieved through the three optical elements, and the optical module is compact in structure, small in size and low in cost, and has few limitation to a light source.

Description

technical field [0001] The present invention relates to the technical field of spot superposition, in particular to an optical module and a laser module. Background technique [0002] At present, Lidar (Lidar) mainly implements the application of superimposed spots in two ways: one is through the diffraction element (DOE), such as the diffraction element disclosed in patent 201811051292.6 and its application in the Lidar system, with the help of incoherent laser When illuminated independently of each other, non-interfering diffraction patterns are generated in the far field as the total diffraction pattern. The other is to oscillate the light source so that the light source is irradiated at different angles to realize the superposition of far-field laser beams. [0003] However, the above two methods have their disadvantages. When the DOE element realizes the superimposition of point-like spots, there are restrictions on the wavelength and type of the light source; and the ...

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Problems solved by technology

[0003] However, the above two methods have their disadvantages. When the DOE element realizes the superposition of point-like spots, there are restrictions on the wavelength of the light source and the type of light source; and the placement angle of the light source will lead to an uncompact structure of the entire optical system and a large size of the light outlet.

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