Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-03-28
1990-01-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
73 73, 733365, H01J 516, H01J 4014
Patent
active
048945323
ABSTRACT:
An optical fiber moisture sensor is prepared by coating an optical fiber with a thin film of plasma polymerized hexamethyldisiloxane and ammonia, approximately 1-2 .mu.m thick. The light transmission characteristics of such a coated optical fiber change as a function of moisture conditions in an environment to which the coating is exposed. Accordingly, the coated optical fiber may be utilized by sensing changes in moisture conditions in an environment by being placed in the environment, causing light to be transmitted through the fiber and detecting changes in the light transmitted through the fiber as a function of the moisture conditions in the environment.
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Claiborne C. Clair
Pearce Jr. Henry A.
Pebler Alfred R.
Peterson Steven H.
Sadhir Rajender K.
Messinger Michael
Nelms David C.
Westinghouse Electric Corp.
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