Thermal radiation imaging devices and systems

Details Thermal radiation imaging devices and systems Thermal radiation imaging devices and systems

1981-06-02

1990-06-05

Buczinski, Stephen C.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

250334, 250332, 250330, 250211J, G01J 522

Patent

active

049316486

ABSTRACT:
Between the spaced biasing electrodes of a thermal radiation imaging device A D.C. bias source is connected to cause the flow of a bias current in the device body which is preferably of n-type cadmium mercury telluride. The bias current supports an ambipolar drift of radiation-generated minority carriers (holes) in the opposite direction. The device is operated in a system in which the radiation pattern is scanned across the device body in the same direction and at the same rate as the ambipolar velocity. Instead of having a single read-out electrode, a more sophisticated system with better performance is obtained by distributing between the spaced biasing electrodes a plurality of read-out electrodes each of which forms a Schottky barrier or p-n junction with the body material.

REFERENCES:
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patent: 3324297 (1967-06-01), Stieltjes et al.
patent: 3391282 (1968-07-01), Kabell
patent: 3704376 (1972-11-01), Lehovec
patent: 3961998 (1976-06-01), Schargnhorst et al.
patent: 3983573 (1976-09-01), Ishihara
patent: 3995159 (1976-11-01), Elliott
patent: 4032903 (1977-06-01), Weimer
patent: 4035197 (1977-07-01), Raychaudhuri
patent: 4238674 (1980-12-01), Kuerbitz

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