Optics: measuring and testing – By dispersed light spectroscopy – With raman type light scattering
Patent
1998-11-19
2000-02-22
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With raman type light scattering
G01J 344, G01N 2165
Patent
active
060286660
ABSTRACT:
An improved fiber optic Raman sensor (FORS) provides high sensitivity and fective rejection of Rayleigh backscatter and background Raman emissions. Multiple receiving optical fibers are arranged around a transmitting optical fiber to increase the sensitivity of the sensor to Raman emissions from an analysis sample. A Raman emission filter is coupled to the transmitting fiber for preventing output of Raman emissions from the optical fiber to the sample, and a Rayleigh line filter is coupled to the receiving optical fibers for removing Rayleigh line energy emitted by the analysis sample. Rayleigh backscatter emitted by the analysis sample is reduced by orienting the sensor at an appropriate angle with respect to the surface of the sample.
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Boss Pamela A.
Lieberman Stephen H.
Evans F. L.
Fendelman Harvey
Kagan Michael A.
The United States of America as represented by the Secretary of
Whitesell Eric James
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