Multifrequency excitation of gas rotational spectra

Details Multifrequency excitation of gas rotational spectra Multifrequency excitation of gas rotational spectra

1975-04-21

1977-03-08

McGraw, Vincent P.

Optics: measuring and testing

Oil testing

356103, 356106S, G01J 344, G01B 902

Patent

active

040110133

ABSTRACT:
A method and apparatus for spectroscopic gas analysis are provided. Plural beams of monochromatic radiation are directed through gaseous material. A tuning mechanism adjusts the frequency difference between the radiation beams to equal substantially and odd integral submultiple of the frequency difference between adjacent spectral components of the periodic spectrum for a preselected constituent of the gaseous material. Radiation scattered by the gaseous material is received by a primary interferometric mechanism adapted to transmit selectively a detectable signal composed of the periodic spectrum. The signal is received by a detecting means which indicates the intensity thereof.

REFERENCES:
patent: 3768908 (1973-10-01), Zaromb
patent: 3802777 (1974-04-01), Regnier et al.
patent: 3853404 (1974-12-01), Barrett

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