One, photoelectric effect sensor

　　 Photosensitive devices made by the photoelectric effect of photosensitive materials are divided into external photoelectric effect and internal photoelectric effect devices.

　　 2. Infrared pyroelectric detector

　　 For devices that are sensitive to long-wave (infrared) in the spectrum, infrared optoelectronic devices-photoelectric effect infrared devices and pyroelectric devices.

　　 Three, solid-state image sensor

From the structure, it can be divided into two categories: one is CCD image sensor, which is made by the photoelectric conversion and charge transfer function of CCD; the other is MOS image sensor, which uses photodiode and MOS transistor to convert light signal into Photosensitive devices for charge or current signals, also known as self-scanning photodiode arrays (SSPA).

　　 Four, optical fiber sensor

　　 is the only kind of photosensitive sensor with light source.