Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Reexamination Certificate
2005-02-24
2008-07-22
Nguyen, Tu T (Department: 2886)
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
Reexamination Certificate
active
07403283
ABSTRACT:
A method and apparatus for detecting minority gaseous species in a mixture by light-emission spectroscopy by means of an optical spectrometer (8), in which the radiation emitted by a plasma (4) present in the gas mixture for analysis is used and, in the spectrum of the radiation, lines are identified of a majority gaseous species that present amplitudes that are sensitive to the presence of a minority species, and information about the concentration of a minority gaseous species is deduced from the amplitude(s) of the sensitive line(s). This makes it possible to monitor minority gaseous species in real time.
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U.S. Appl. No. 11/064,483, entitled “Detecting Gaseous Species by Light-Emission Spectrometry with Spectrum Processing.”.
Bounouar Julien
Desbiolles Jean-Pierre
Gaurand Isabelle
Sogan Gloria
Alcatel
Nguyen Tu T
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