Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2011-01-11
2011-01-11
Porta, David P (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
Reexamination Certificate
active
07868296
ABSTRACT:
A spectroscopic method and spectroscopy system therefrom for analyzing samples. A sample includes a first chemical component that has a characteristic first absorption peak is provided. The sample is irradiated in a measurement waveband proximate to the first absorption peak, and at a first and a second reference waveband where the first chemical component lacks characteristic absorption features. Reflected or transmitted detection data is obtained including a measured power proximate to the first absorption peak and first and second reference powers at the reference wavebands. A plurality of different waveband ratios are evaluated using pairs of detection data to generate a plurality of measured waveband ratio values. A parameter of the first chemical component is then determined by evaluating a multidimensional polynomial calibration equation that relates the parameter of the first chemical component to the plurality of different waveband ratios by substituting the measured waveband ratio values into the calibration relation.
REFERENCES:
patent: 4957770 (1990-09-01), Howarth
patent: 6074483 (2000-06-01), Belotserkovsky et al.
patent: 7071470 (2006-07-01), Nomura et al.
patent: 7382456 (2008-06-01), Tixier et al.
Haran Frank M.
Meijer-Drees Reena
Tixier Sebastien
Honeywell ASCa Inc.
Jetter & Associates, P.A.
Kim Kiho
Porta David P
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