Laser radar

Abstract

A laser radar disclosed by the present invention comprises a mounting base and transmitting and receiving assemblies, the mounting base is provided with transmitting and receiving areas, the transmitting and receiving assemblies are respectively arranged in the transmitting and receiving areas, and the transmitting assembly comprises a plurality of semiconductor lasers with transmitting ends and a plurality of micro-shaping lenses which are arranged in a one-to-one correspondence manner. The micro-shaping lenses are used for emitting multiple beams of laser towards a target, are coupled to the corresponding emitting ends and are used for integrating the multiple beams of laser emitted by the emitting ends; the receiving assembly comprises a plurality of photoelectric detectors which are arranged in one-to-one correspondence with the plurality of semiconductor lasers and are provided with receiving ends, and an optical filter, and is used for receiving the multiple beams of laser reflected by the target, and the optical filter wraps the plurality of receiving ends and is used for filtering stray light in the multiple beams of laser received by the receiving ends. The high optical performance of the laser radar is ensured through the combined action of the micro-shaping lens and the optical filter.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a laser radar. Background technique [0002] In the current lidar market, lasers with weak anti-interference optical performance have obvious shortcomings in safety performance, and lasers with strong anti-interference optical performance have certain obstacles in terms of integration, and cannot be miniaturized and microquantified, and The cost is relatively high. [0003] LiDAR currently on the market is mainly based on two types of lasers, one is a 905nm semiconductor laser, and the other is a 1550nm fiber laser. According to relevant market research, the most widely used of these two lasers is the 905nm laser. In terms of the optical performance of the light source, the 905nm laser has weak anti-interference ability and relatively short detection distance. In actual use, the ability to penetrate rain and fog is obviously insufficient. From the perspective of safety performan...

AI Technical Summary

Problems solved by technology

However, when the 1550nm fiber laser is applied to the lidar, because it cannot be integrated and the corresponding module is very large, the volume of the lidar is too large, and it cannot meet the requirements of the current car-level requirements on the market.

Compared with the 905nm laser, the 1550nm fiber laser has higher power during operation, consumes more power at the same time, and generates more heat. The overall layout of the radar needs to be more designed for heat dissipation, and it takes up more space. space

Secondly, because 1550nm fiber lasers cannot make breakthroughs in some corresponding technical fields, the price of 1550nm fiber lasers is generally high

When applied to lidar, the cost of manufacturing lidar will also be high

Images