Optics: measuring and testing – For light transmission or absorption – By comparison
Reexamination Certificate
2005-12-13
2005-12-13
Rosenberger, Richard A. (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
By comparison
Reexamination Certificate
active
06975403
ABSTRACT:
The invention relates to a method comprising passing a first variable intensity light beam across a first test-tube (3) wherein the substance (1) to be controlled is circulating. Subsequently, a second fixed-intensity light beam is passed across a second test-tube (4) with a reference sample. The intensities of both beams are compared once they have crossed over the test tubes and the intensity of the first beam is varied so that said intensities are equal. The parameter of interest in the first test tube is calculated by means of signal processing which causes the first beam to vary.
REFERENCES:
patent: 2594514 (1952-04-01), Sweet
patent: 3489906 (1970-01-01), Beer
patent: 3674370 (1972-07-01), Jonsson
patent: 4037972 (1977-07-01), Pross
patent: 5699156 (1997-12-01), Carver
Bruno Barcena Jose Manuel
Navarro Herrero Jose Luis
Pico Marco Enrique
Pico Marco Jesus
Valles Albentosa Salvador
Consejo Superior de Investigaciones Cientificas
Klauber & Jackson
Rosenberger Richard A.
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