LiDAR, which stands for Light Detection and Ranging, it is a radar system which can detect the position and velocity of the target by launching laser beam. Its working principle is to send detection signal (shock beam) to the target, and then compare the received signal (target echo) reflected from the target with the transmitted signal. After proper processing, the relevant information of the target can be obtained, such as the target distance, orientation, height, speed, attitude, even shape and other parameters, so as to detect, track and identify the aircraft, missile and other targets. It consists of a laser transmitter, an optical receiver, a turntable and an information processing system. The laser changes the electric pulse into an optical pulse and sends it out. The optical receiver then converts the optical pulse reflected from the target into an electric pulse and sends it to the display.