Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-03-30
1993-12-14
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502311, 25022721, 385 12, H01J 516
Patent
active
052705382
ABSTRACT:
A system adapted for attachment to a device that undergoes changes in temperature and pressure, and for detecting changes in temperature and pressure in the device comprises a mechanism for attaching the system to the device and an optic device that includes pressure-responsive, temperature-responsive optical fibers that produce signals representative of temperature changes over a first optical frequency band, and of pressure changes over a second, distinctly different optical frequency band, or two or more optic devices, at least one including a pressure-responsive optical fiber, and at least one including a temperature-responsive optical fiber.
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Okamoto et al., "Multimode fiber-optic Mach-Zehnder interferometer and its use in temperature measurement", Applied Optics; vol. 27; No. 15; Aug. 1988; pp. 3085-3087.
Brownrigg Patrick C.
Chang David B.
Vali Victor
Denson-Low W. K.
Gudmestad Terje
Hughes Aircraft Company
Lee John R.
Leitereg Elizabeth E.
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