Low-coherence interferometry optical sensor using a single wedge polarization readout interferometer
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United States of America Patent
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Aug 21, 2007
Grant Date -
Mar 23, 2006
app pub date -
Nov 1, 2004
filing date -
Sep 20, 2004
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Abstract
The invention provides a method and a system for measuring a physical quantity by means of a tandem interferometer optical sensor system based on low-coherence interferometry. The system comprises a light system, a sensing interferometer and a polarization readout interferometer. The invention provides a polarization interferometer comprising a single birefringent wedge. The invention also provides for a dispersion-compensated optical sensor system. The invention also provides an interferometer sensitive to temperature that comprises a trajectory in a L.sub.iB.sub.3O.sub.5 crystal with an x-cut orientation.
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