Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Reexamination Certificate
2005-05-24
2005-05-24
Healy, Brian (Department: 2874)
Optical waveguides
Optical waveguide sensor
Including physical deformation or movement of waveguide
C385S012000, C250S227140, C250S227170, C250S227180, C340S555000, C340S556000, C073S861420, C073S861460, C073S861470
Reexamination Certificate
active
06898339
ABSTRACT:
A multiple mode pre-loadable fiber optic pressure and temperature sensor includes a generally cylindrical structure having at least one compression element, a fiber optic having a Bragg grating in contact with one side of the compression element, a diaphragm in contact with the other side of the compression element, and a fluid port in fluid communication with the diaphragm. According to preferred aspects of the, a groove is provided in at least one compression element for receiving the fiber optic. The sensor is pre-loaded by straining the diaphragm over the adjacent compression element when the cover is attached. The compression element in contact with the diaphragm preferably has a contoured surface contacting the diaphragm and the diaphragm is stretched to match that contour. By varying the contour of the compression element and the thickness of the diaphragm, the dynamic range of the sensor can be changed. The preferred diaphragm has a variable thickness and is made as an integral part of the structure. The sensor can be operated in normal, reverse, or differential mode.
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Dryden Philip
Madhavan Raghu
Ramos Rogerio
Schroeder Robert
Shah Jagdish
Batzer William B.
Gordon David P.
Healy Brian
Ryberg John J.
Schlumberger Technology Corporation
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