Si APD

The principle of photodetectors is the change of electrical conductivity of irradiated materials caused by radiation. Photodetectors are widely used in various fields of military and national economy. In the visible or near infrared wavelengths, it is mainly used for ray measurement and detection, industrial automatic control, photometric measurement and so on. In the infrared band, it is mainly used in missile guidance, infrared thermal imaging, infrared remote sensing and so on.