Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-03-11
1989-09-12
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250231R, H01J 516, H01J 4014
Patent
active
048662658
ABSTRACT:
An optical moisture sensor including a housing having a port for coupling with an optical beam and an optical means for receiving the optical beam and providing therefrom an expanded, collimated optical beam, the optical means further including moisture responsive means for affecting the expanded, collimated beam.
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Nelms David C.
Nynex Corporation
Oen William L.
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