Calibration system for spectrographic analyzing instruments

Details Calibration system for spectrographic analyzing instruments Calibration system for spectrographic analyzing instruments

G - Physics

01

J

G01J 3/42 (2006.01) G01J 3/02 (2006.01) G01J 3/28 (2006.01)

Patent

CA 2276750

In a system for analyzing materials by near infrared analysis, a library of absorbance spectra from sample material is stored in computer storage (21). The absorbance spectra of an unknown material is measured and is correlated with the library spectra to select those library spectra which most closely match the spectrum of the unknown material. The selected library spectra are used to determine, by least square convergence, or by multiple regression, coefficients in the equations relating measurable properties of the unknown material to absorbance measurements made on the unknown material.

La présente invention concerne un système permettant d'analyser des matières par analyse à infrarouge proche, dans lequel une bibliothèque de spectres d'absorption d'échantillons de matières est mise en mémoire dans un ordinateur (21). On mesure les spectres d'absorption d'une matière inconnue et on les met en corrélation avec les spectres de la bibliothèque afin de choisir les spectres de bibliothèque qui correspondent le plus précisément au spectre de la matière inconnue. On utilise les spectres de bibliothèque choisis pour déterminer, par convergence des moindres carrés ou par régression multiple, des coefficients dans les équations reliant les propriétés mesurables de la matière inconnue aux mesures d'absorption effectuées sur la matière inconnue.

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