Devices that use ToF technology to image are called ToF cameras. ToF cameras are similar to ordinary machine vision imaging processes. They are all composed of light sources, optical components, sensors (ToF chips), control circuits, and processing circuits. Several units. This technology is basically similar to the principle of the 3D laser sensor, except that the 3D laser sensor scans point by point, while the ToF camera obtains the depth information of the entire image at the same time.
ToF cameras have fundamentally different 3D imaging mechanisms compared to binocular measurement systems that are very similar in their field of application. The binocular stereo measurement is performed by the matching of left and right stereo image pairs, and then the stereo detection is performed by the triangulation method, while the ToF camera is obtained by the target distance obtained by the detection of incoming and reflected light.
ToF technology adopts the active light detection method. Unlike general lighting requirements, the purpose of the ToF irradiation unit is not to illuminate, but to measure the distance by using the change of the incident light signal and the reflected light signal. Therefore, the ToF irradiation units are all The light is emitted after high frequency modulation.
