Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1996-06-17
1999-02-16
Westin, Edward P.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503381, G01J 5126
Patent
active
058723625
ABSTRACT:
A radiation detector employs a thermopile having a potentiometer for scaling the thermopile output to best suit a particular output meter and sensing application. The output of the thermopile is scaled to approximate the output of a thermocouple in contact with a target surface and is indicative of the temperature of the target. Two detectors may be connected differentially to provide a differential output indicative of the temperature difference between two targets. Additionally, a temperature dependent variable resistor may be coupled to the thermopile, providing a variable resistance that combines with the thermopile output response to produce a linearized thermopile output response. Then, the total output signal of the detector for a particular target temperature is independent of fluctuations in local temperature.
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Exergen Corporation
Hanig Richard
Westin Edward P.
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