Photoacoustic rotational raman spectroscopy
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United States of America Patent
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-
Jun 2, 1981
Grant Date -
N/A
app pub date -
Mar 14, 1979
filing date -
Mar 14, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for spectroscopic material analysis are provided. Two coherent beams of monochromatic radiation are directed through a sample of material. A tuning mechanism adjusts the frequency difference between the radiation beams to equal substantially the rotational frequency of a preselected constituent of the material. Molecular energy of a preselected constituent of the material is increased, thereby producing a detectable signal in the form of a pressure wave. The signal is received by a detecting mechanism which indicates the magnitude thereof.
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