Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Reexamination Certificate
2007-11-28
2008-10-14
Evans, F. L (Department: 2877)
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
C356S301000, C356S307000, C250S458100
Reexamination Certificate
active
07436510
ABSTRACT:
A spectroscopic detector for identifying the presence of a first substance in the presence of another substance includes a laser for illuminating the substances at a plurality of wavelengths to induce the emission of radiation characteristic of the substance; a spectrometer for measuring the emitted radiation to obtain a plurality of spectral measurement data; and a processor for processing the data. An algorithm combines the data into a composite spectrum and a parameter characteristic of the first substance is identified while information in the composite spectrum contributed by emission of radiation from the other substance is removed to identify the presence of the first substance and obtain a characteristic spectral signature of the first substance. The signature is compared to signatures in a spectral library database, wherein at least some of the library signatures have spectral characteristics differentiated from each other by identifiable spectral characteristics caused by environmental factors.
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Bowles Jeffrey H
Corson Michael R
Grun Jacob
Manka Charles K
Sperry Jay F
Evans F. L
Karasek John J.
Legg L. George
The Board of Governors for Higher Education, State of Rhode Isla
The United States of America as represented by the Secretary of
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