Thermal imaging systems

Details Thermal imaging systems Thermal imaging systems

1975-11-24

1976-11-30

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

250334, G01T 122

Patent

active

039951596

ABSTRACT:
A single three-electrode linear detector replaces the conventional series or parallel linear detector array in a scanned image thermal detection system. The detector comprises an elongated semiconductor/photoconductor strip, typically 0.25 cm long and 50 .mu.m wide, e.g., of cadmium mercury telluride. A bias current in the strip is arranged to give a photocarrier drift velocity in the strip which matches the image scanning velocity thereby giving enhanced image resolution. Modulation in photocarrier current which constitutes the detected image is measured as a bulk resistivity change between two readout electrodes positioned near one end of the strip.

REFERENCES:
patent: 3488500 (1970-01-01), Welti
patent: 3585394 (1971-06-01), Higby et al.

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