Narrow band high sensitivity photodetector for inverse photoemis

Details Narrow band high sensitivity photodetector for inverse photoemis Narrow band high sensitivity photodetector for inverse photoemis

1995-03-15

1996-09-03

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250372, 2504581, 2504591, G01N 2100, G02F 101, H01L 3110

Patent

active

055525954

ABSTRACT:
A narrow band high sensitivity photo-detector for inverse photoemission spectroscopy, in which an electron beam from an electron gun is applied onto a sample and a light reflected therefrom is converged into a photo-electron detector, so as to effect photo-electron detection in a photo-electron multiplier, wherein said photo-electron detector comprises a CaF.sub.2 monocrystal window provided with a KCl thin film in the front of said photo-electron detector, a first dynode deposited with a KCl thin film on a surface thereof, wherein an output of the photo-electron multiplier is applied with a pulse counter circuit through an amplifier, so as to measure light absorption properties, window transmissibility and detection sensitivity as a band pass filter.

REFERENCES:
patent: 3712700 (1973-01-01), Sommer
patent: 5120965 (1992-06-01), Suga et al.
patent: 5340976 (1994-08-01), Taniguchi et al.

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