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Acoustic resonance frequency locked photoacoustic spectrometer

United States Patent

September 9, 2003
View the Complete Patent at the US Patent & Trademark Office
A photoacoustic spectroscopy method and apparatus for maintaining an acoustic source frequency on a sample cell resonance frequency comprising: providing an acoustic source to the sample cell, the acoustic source having a source frequency; repeatedly and continuously sweeping the source frequency across the resonance frequency at a sweep rate; and employing an odd-harmonic of the source frequency sweep rate to maintain the source frequency sweep centered on the resonance frequency.
Pilgrim; Jeffrey S. (Santa Fe, NM), Bomse; David S. (Santa Fe, NM), Silver; Joel A. (Santa Fe, NM)
Southwest Sciences Incorporated (Santa Fe, NM)
09/ 782,138
February 12, 2001
GOVERNMENT RIGHTS The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Contract No. DE-FG03-99ER82887 awarded by the U.S. Department of Energy and of Grant No. DMI-9983349 awarded by the U.S. National Science Foundation.