Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1958-11-25
1990-02-27
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250231P, 350 9629, 350 9633, 356345, 356351, H01J 516, H01J 4014
Patent
active
049048635
ABSTRACT:
An optical fiber pressure sensor in a double polarimetric configuration comprises a first polarimetric circuit including an optical fiber sensing coil in a planar, substantially circuitous orientation between two flat plates to provide an optical signal indicative of a pressure within a fluid medium, the circuit including light detection and signal demodulation means to provide an output signal indicative of the pressure; and a second polarimetric circuit intercoupled to the first circuit through an optical coupler, the second circuit providing a source of light which is divided by the coupler between the two circuits and the second circuit includes optical and electronic circuit means to provide a feedback signal to stabilize the operation of the source of light. The pressure sensor is configured and packaged to enhance its sensitivity to pressure while substantially immunizing it against changes in temperature.
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Germain L. A.
Loral Corporation
Messinger Michael
Nelms David C.
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