Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1998-07-20
2000-02-08
Font, Frank G.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
356316, 356345, 356346, G01J 330, G01B 902
Patent
active
06023329&
ABSTRACT:
A method and an apparatus determines at least one parameter of a material flow. The parameter is for example temperature, pressure or velocity of the gas or plasma flow. The material flow is either a gas or a plasma flow. The method and the apparatus are utilizing atomic absorption spectroscopy and feed a Rubidium compound into the gas or plasma flow, in which the Rubidium compound dissociates into Rubidium atoms. The Rubidium atoms are stimulated with a first laser beam and a first transmitted laser intensity is detected. First absorption lines are determined from the first transmitted laser intensity. Rubidium atoms are stimulated with a second laser beam, a second transmitted reference laser intensity is detected and second reference absorption lines are determined from the second transmitted reference laser intensity. Finally, at least one parameter of the gas or plasma flow is determined from the comparison of the first absorption lines and the second reference absorption lines of the Rubidium atoms.
REFERENCES:
patent: 3787120 (1974-01-01), Hirco
patent: 4898028 (1990-02-01), Brehm
patent: 5414509 (1995-05-01), Veligdan
Beck Walter
Trinks Ole
Font Frank G.
Stafira Michael P.
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