Optical waveguides – With optical coupler
Reexamination Certificate
2007-12-04
2007-12-04
Connelly-Cushwa, Michelle (Department: 2874)
Optical waveguides
With optical coupler
C385S014000, C356S477000, C356S480000
Reexamination Certificate
active
11048521
ABSTRACT:
A signal conditioner to measure the length of an interferometric gap in a Fabry-Perot sensor (interferometer). The invention includes a light source, a Fabry-Perot interferometer capable of spanning a range of gaps in response to physical changes in the environment, a second interferometer that is placed in series with the Fabry-Perot interferometer which does not filter any particular wavelengths of light but acts as an optical cross-correlator, a detector for converting the correlated light signal into electronic signals, and an electronic processor which controls system elements and generates a signal indicative of the length of the gap spanned by the Fabry-Perot sensor.
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R.L. Johnson, et al. “Miniature Instrument for the Measurment of Gap Thickness using Ply-chromatic Interferometry”, Center for Astronomical Adaptive Optics, Steward Observ., U of AZ, Tucson.
Berthold John W.
Jeffers Larry A.
Lopushansky Richard L.
Needham David B.
Connelly-Cushwa Michelle
Davidson Instruments Inc.
Earp III Robert H.
McDonald Hopkins LLC
Peace Rhonda S.
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