Method and apparatus for optoacoustic spectroscopy

Details Method and apparatus for optoacoustic spectroscopy Method and apparatus for optoacoustic spectroscopy

1978-04-28

1979-08-07

Swisher, S. Clement

Measuring and testing

Gas analysis

By vibration

250351, G01N 3100, G01N 2124

Patent

active

041633822

ABSTRACT:
A method and apparatus that significantly increases the sensitivity and flexibility of laser optoacoustic spectroscopy, with reduced size. With the method, it no longer is necessary to limit the use of laser optoacoustic spectroscopy to species whose absorption must match available laser radiation. Instead, "doping" with a relatively small amount of an optically absorbing gas yields optoacoustic signatures of nonabsorbing materials (gases, liquids, solids, and aerosols), thus significantly increasing the sensitivity and flexibility of optoacoustic spectroscopy. Several applications of this method are demonstated and/or suggested.

REFERENCES:
patent: 3700890 (1972-10-01), Kruezer
patent: 3820901 (1974-06-01), Kreuzer
patent: 3938365 (1976-02-01), Dewey
patent: 3948345 (1976-04-01), Rosencwaig

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