LiDAR is the abbreviation of "Light Detection and Ranging", which is a method of ranging and imaging using lidar technology. It measures the distance and shape of objects by firing laser pulses and recording their return times. The laser beam returns to the sensor after being reflected from the surface of the illuminated object, and the sensor records the time and direction of the reflected laser light, thereby determining the position and shape of the object. LiDAR systems usually include components such as laser transmitters, receivers, control systems, and data processing units.