Compared with ordinary microwave radar, lidar uses laser beam. The laser diode is a very important part of the lidar, which can emit a laser beam to detect the position and velocity of the target. Its working frequency is much higher than microwave, so it gives lidar many advantages, such as high resolution, good concealment, strong anti-interference ability, excellent low-altitude detection performance, small size, and light weight. Compared with LED and EEL, VCSELs have considerable advantages in terms of performance and cost. Therefore, lidar equipped with VCSEL will show significant applications in various fields.

Lidar can give the vehicle many functions, such as forward and backward collision avoidance, automatic obstacle avoidance, and automatic driving. Lidar can assist the robot to automatically acquire the environmental information of the three-dimensional space, construct the map in a complex environment, and move autonomously in the environment. In addition, lidar can also be used for AGV collision avoidance, intelligent transportation, automatic toll booths and more.