G - Physics – 01 – J
Patent
G - Physics
01
J
73/55
G01J 3/44 (2006.01)
Patent
CA 1058415
INVENTION: MONOCHROMATIC DETECTION OF PLURAL ROTATIONAL RAMAN SPECTRA GENERATED BY MULTIPLE FREQUENCY EXCITATION INVENTORS: Joseph J. Barrett and Ernest D. Buff ABSTRACT OF THE DISCLOSURE 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 an odd integral submultiple of the frequency difference between adjacent spectral components of the periodic spectrum for a pre- selected constituent of the gaseous material. Radiation scattered by the gaseous material is received by a filtering mechanism adapted to transmit selectively a detectable signal composed of a single superimposed spectral component of the spectrum. The signal is received by a detecting means which indicates the intensity thereof.
250370
Barrett Joseph J.
Buff Ernest D.
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