Photoacoustic analyzer

Details Photoacoustic analyzer Photoacoustic analyzer

1983-09-07

1985-12-10

Kreitman, Stephen A.

Measuring and testing

Gas analysis

By vibration

G01N 2100

Patent

active

045571376

ABSTRACT:
A photoacoustic analyzer comprises an analyzing cell having a beam entrance window and including a cylindrical piezoelectric transducer element forming at least a part of the wall thereof, and a laser beam emitter emitting a laser beam directed toward and into the analyzing cell through the beam entrance window. In the photoacoustic analyzer, the ratio r/r.sub.o between the radius r of the inner side of the analyzing cell and the radius r.sub.o of the incident laser beam is selected to lie within the range of 1.ltoreq.r/r.sub.o .ltoreq.8.

REFERENCES:
patent: 3938365 (1976-02-01), Dewey, Jr.
patent: 4200399 (1980-04-01), Kimble et al.
T. F. Deutsch, "Optoacoustic Measurements of Energy Absorption in CO.sub.2 TEA-Laser-Excited SF.sub.6 at 293 and 145 K", Optics Letters, vol. 1, No. 1, pp. 25-27, Jul. 1977.
V. P. Zharov et al., "Optoacoustic Laser Spectroscopy of Excited Vibrational Molecular States", Appl. Physics, pp. 12, 16, 17, 1977.

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