Wide operational range thermal sensor

Details Wide operational range thermal sensor Wide operational range thermal sensor

2005-01-04

2005-01-04

Gagliardi, Albert (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

C250S338100

Reexamination Certificate

active

06838669

ABSTRACT:
Bolometer system and method for detecting, at BLIP levels, presence of radiation over a broad range of wavelengths in an infrared spectrum and in a temperature range from 20 K to as high as room temperature. The radiation is received by a Si crystal having a region that is doped with one or more of In, Ga, S, Se, Te, B, Al, P, As and Sb in a concentration ratio in a range such as 5×10−11to 5×10−6. Change in electrical resistance ΔR due to receipt of the radiation is measured through a change in voltage difference or current within the crystal, and the quantity ΔR is converted to an estimate of the amount of radiation received. Optionally, incident radiation having an energy high enough to promote photoconductivity is removed before detection.

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