ToF is an abbreviation of Time of Flight, and some translations call it flight time. The basic principle is to emit a continuous infrared light pulse (light source: VCSEL) of a specific wavelength to the target, receive the optical signal (Camera) returned by the object to be measured through a specific sensor, and calculate the flight time or phase difference of the light to get the object 3D depth information. The brightness image and depth information of the TOF camera can be connected through the algorithm to complete the detection quickly and accurately.