Photodiode

Details Photodiode Photodiode

H - Electricity

01

J

345/19, 313/69

H01J 40/00 (2006.01) G01N 30/74 (2006.01)

Patent

CA 1275301

PHOTODIODE Abstract of the Disclosure A non-evacuated photodiode for detecting far-uv radiation. The photocathode is a cylindrical element surrounded by an annular anode. The photocathode is constructed of a metal (e.g., nickel) that emits electrons only in response to far-uv radiation of 140 nanometer or shorter wavelengths. A window (e.g., magnesium fluoride) is positioned at the entrance to the photodiodel to filter out far-uv radiation with wavelengths shorter than about 10Q nanometers. The window and photocathode material serve to make the photodiode sensitive to radiation in a wavelength range no greater than 100 to 140 nanometers. A high-temperature perfluoroethylene material is used as an insulating layer for spacing the window from the anode and for spacing the anode from the photocathode. The photodiode is used in a gas chromatography detector.

494219

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