Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1977-06-23
1979-04-10
Corbin, John K.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
250423P, 324 65R, G01J 328, G01R 2702
Patent
active
041485866
ABSTRACT:
An apparatus and method for utilizing the opto-galvanic effect to perform spectroscopic or analytic investigations of atomic or molecular species. A sample of the substance to be analyzed is vaporized in an analytical flame, gas discharge tube, high temperature furnace or the like, and the vapor is irradiated with chopped or pulsed variable wavelength monochromatic light. The electrical resistance of the vapor is monitored as the frequency of the radiation is tuned through one or more electronic transition frequencies of the substance. The resistance spectrum resembles the optical absorption spectrum of the species in the vapor. The opto-galvanic effect may also be used to frequency lock a laser to a transition frequency of a substance in a gas discharge cell.
REFERENCES:
patent: 3691478 (1972-09-01), Jacobs et al.
patent: 3911276 (1975-10-01), Bell
patent: 3933432 (1976-01-01), Driscoll
Badarev et al., "Atomic Absorption by Electron Spectroscopy", Rev. Roum. s., vol. 10, #8, 1965, pp. 785-798.
Green Robert B.
Keller Richard A.
Luther Gabriel G.
Schenck Peter C.
Travis John C.
Corbin John K.
Englert Alvin J.
Pawlikowski Eugene J.
Punter Wm. H.
The United States of America as represented by the Secretary of
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