Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-08-22
1996-02-13
Allen, Stephone B.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2503381, 250352, G01J 104, G01J 500
Patent
active
054913349
ABSTRACT:
A detector interface system communicates signals between an infrared detector element maintained in a cryogenic environment and associated signal processing circuitry maintained in a non-cryogenic environment. An optical modulator disposed within the cryogenic environment in electrical communication with the infrared detector element converts the electrical output of the infrared detector element into an optical output signal representative thereof. An optical demodulator disposed in the non-cryogenic environment converts the optical output signal of the optical modulator into an electrical signal. The optical demodulator is an electrical communication with the signal processing circuitry. An optical path from the optical modulator to the optical demodulator provides thermal isolation between the infrared detector element and its associated signal processing circuitry and minimizes detector bias so as to mitigate 1/f noise.
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Durst David I.
Gartenberg Alvin
Allen Stephone B.
Grumman Aerospace Corporation
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