Area array type laser radar optical path system and laser radar

Abstract

The invention discloses an area array type laser radar optical path system, which comprises an array type transmitting module composed of a plurality of laser diodes arranged according to an array, and laser beams output by the plurality of laser diodes form a laser beam area array; an array type receiving module, wherein the array type transmitting module comprises a plurality of avalanche photodiodes arranged in an array; and the lens module is arranged between the array type transmitting modules and is used for constraining the transmission of laser beams. According to the technical scheme,the transmitting end and the receiving end are designed to be area array type transmitting and area array type receiving, so that high integration of the transmitting assembly and the receiving assembly is realized, the production process is simplified, the light modulation efficiency is improved, and the product cost is reduced; moreover, compared with linear array emission, the area array emission can greatly improve the scanning resolution of the laser radar, gives consideration to the focusing performances in the horizontal and vertical directions, and enables the focusing effect to be better.

Description

technical field [0001] The invention relates to the field of laser radar, in particular to an area array laser radar optical path system and laser radar. Background technique [0002] At present, the optical path scheme of the rotary lidar is mainly divided into three types: the first one is a point-to-point scheme, that is, one transmission corresponds to one reception; the second one is a line-to-line-array scheme, and the third is a line-to-surface array Program. Among them, the point-to-point solution has low production efficiency and high requirements for light adjustment operation, which cannot meet mass production. Linear array to linear array is currently the mainstream solution. Due to the reason of the emitting light source device, the transmitting module is more complicated, and the energy gathering effect in the vertical direction is weak, which affects the radar ranging; the linear array to linear array solution is more than 32 lines above the lidar It needs m...

AI Technical Summary

Problems solved by technology

Among them, the point-to-point solution has low production efficiency and high requirements for light adjustment operations, which cannot meet mass production

Linear array to linear array is currently the mainstream solution. Due to the reason of the emitting light source device, the transmitting module is more complicated, and the energy gathering effect in the vertical direction is weak, which affects the radar ranging; the linear array to linear array solution is more than 32 lines above the lidar Multiple transmitting boards and multiple receiving boards are required, which increases the difficulty of light adjustment

Compared with the line array to line array scheme, the change of the line array to area array scheme is that the receiving board adopts area array, and multiple transmitting line boards are used to correspond to one receiving panel, but the position accuracy of the receiving end device is required to be high.

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