Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-06-01
1993-06-29
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502311, 359158, G01D 534, H01J 516
Patent
active
052237079
ABSTRACT:
Optically powered sensing apparatus which has a photodiode for converting optical power to electrical energy and a switching voltage converter for optimizing power transfer from the photo diode. A controller intermittently provides a synchronizing pulse train and a synchronizing receiver detects periods when optical power drops to zero. A transducer with driving and readout electronics provides electrical parameter signals which are digitized and synchronously transmitted to the controller during the periods of no optical power from the controller. Voltage regulation, impedance matching, and temperature compensation of the photodiode optimize power transfer.
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Bruns Gregory A.
Honeywell Inc.
Messinger Michael
Nelms David C.
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