Development of the Tiny Current Test of nA

The sensor of ray made use of photosensitive element translate the light signal into the electric signal, its keenness wavelength is by wavelength of observable ray, includes the infrared＇s wavelength and ultraviolet radiation＇s wavelengthth. The sensor of ray is not only used for detecting ray but also used for composing the other sensor. It can detect many non-electric signal, the premise should translate the non-electric signal into the light signal. The sensor of ray is a sort of most output and application being most extensive, it is very important in the field of automatic control and none-electric test art.

Development of the Tiny Current Test of nA