Optical waveguides – Optical waveguide sensor
Reexamination Certificate
2005-06-30
2008-11-04
Font, Frank G (Department: 2883)
Optical waveguides
Optical waveguide sensor
C385S134000, C385S138000
Reexamination Certificate
active
07447390
ABSTRACT:
Optical sensors used in harsh environments require a sealed pressure tight passage of an optical waveguide into an interior of the sensor. In one embodiment, a pressure sensor assembly for determining the pressure of a fluid in a harsh environment includes a sensing element suspended within a fluid filled housing. An optical waveguide that provides communication with the sensing element couples to a feedthrough assembly, which includes a cane-based optical waveguide forming a glass plug sealingly disposed in the housing. The glass plug provides optical communication between the optical waveguide and the sensing element. A pressure transmitting device can transmit the pressure of the fluid to the fluid within the housing. The assembly can maintain the sensing element in a near zero base strain condition and can protect the sensing element from shock/vibration.
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GB Search Report, Application No. 0611021.7, dated Sep. 27, 2006.
Dunphy James R.
Grunbeck John
Robbins Joseph F.
Robinson Robert F.
Sgambelluri John J.
El Shammaa Mary A
Font Frank G
Patterson & Sheridan L.L.P.
Weatherford / Lamb, Inc.
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