Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2004-08-13
2009-02-10
Epps, Georgia Y (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S227180
Reexamination Certificate
active
07488929
ABSTRACT:
A fiber optic perimeter detection system includes a receiver to receive output light signals from sensors positioned at different regions, each sensor including a sensing fiber. Each sensor generates an output light signal having a specified wavelength, the output light signal having a property that varies when stress is induced in the sensing fiber. The perimeter detection system includes a memory to store information related to a mapping between the wavelengths of the output light signals and the regions where the sensors are positioned.
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Hellman Scott
Kondis John
Ranalli Eliseo Romolo
Townley-Smith Paul A.
Bui-Pho Pascal M
Epps Georgia Y
Fish & Richardson P.C.
Zygo Corporation
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