Laser-excited spectrophone

Details Laser-excited spectrophone Laser-excited spectrophone

1980-11-17

1983-02-08

Kreitman, Stephen A.

Measuring and testing

Gas analysis

By vibration

G01N 2100

Patent

active

043721494

ABSTRACT:
A laser-excited spectrophone comprises a working chamber having optical windows at its butt ends to pass through laser radiation, a gaseous sample being contained within a cavity thereof. The cavity of the working chamber communicates with a conduit whose length exceeds 8 to 10 times its cross-sectional diameter, while the volume of said conduit is at least 50 times smaller than the volume of the working chamber. The conduit accommodates a condenser microphone. The laser-excited spectrophone in compliance with the invention controls the temperature of the sample gas contained within the working chamber by its heating with the aid of an individual arrangement.

REFERENCES:
patent: 3659452 (1972-05-01), Atwood et al.
patent: 4028932 (1977-06-01), Rosencwaig
patent: 4163382 (1979-08-01), Amer
patent: 4303343 (1981-12-01), Patel et al.
V. P. Zharov et al., "Optoacoustic Laser Spectroscopy of Excited Vibrational Molecular States", Applied Physics, vol. 12, No. 1, pp. 15-17, 1977.
T. F. Deutsch, "Optoacoustic Measurements of Energy Absorption in CO.sub.2 Tea-Laser Excited SF.sub.6 at 293 and 145K", Optics Letters, vol. 1, No. 1, pp. 25-17, Jul. 1977.

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