2.6.3　Photoelectric conversion

It is a measuring method of converting luminous flux into electrical quantity based on the photoelectric effect.Photoelectric converters include photocell,photomultiplier,photosensitive diode and many others.And they all have been widely used in controlling and measuring systems.In recent years,photoelectric converters are also widely used in optical communication and optical input equipment of computers.Optical measurement can be transformed into electrical measurement by using photoelectric elements.(https://www.daowen.com)