brief introduction: Photosensitive sensor is one of the most common sensors, its variety, mainly include: photocell, photomultiplier tube, photosensitive resistor, photosensitive transistor, solar cell, infrared sensor, ultraviolet sensor, optical fiber type photoelectric sensor, color sensor, CCD and CMOS image sensor, etc..The main domestic manufacturers are Otron brand, etc.Optical sensor is one of the sensors with the largest output and the widest application. It plays a very important role in automatic control