Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1991-03-29
1992-05-12
Anderson, Bruce C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
H01J 516, H01J 4014
Patent
active
051130700
ABSTRACT:
An interferometer for measuring pressure using optic fibers has a temperature compensating device. The instrument has an optic fiber sensing leg and an optic fiber reference leg, both of which are clamped in tension. An elongated reference compensating member extends parallel to the reference leg. A similar sensing compensating member compensates parallel to the sensing leg. The compensating members will apply selected tension. The compensating members are expansible in response to temperature change. The lengths of the compensating members can be changed, as well.
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ABB Vetco Gray Inc.
Anderson Bruce C.
Bradley James E.
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