Patent ID: 7359815
Filing Date: 2008-04-15
Classification: G01J,G01N

Abstract:
1. A method for correcting at least one portion of a spectrum by eliminating a baseline which is due to a perturbing spectrum superimposed on said spectrum to be corrected, comprising a sequence of steps: i) collecting from a spectrometer, spectral data representing the spectrum to be corrected, ii) storing the spectral data in a memory, iii) adding data generated from a convex function f to said stored spectral data at least in said portion to be corrected, wherein the convex function f is a function whose tangents at any point of its function curve lie below its function curve at least in said portion to be corrected, iv) determining data representing a convex envelope of said stored spectral data at least in said portion of said spectrum to be corrected, after said convex function f data has been added to said stored spectral data in said portion to be corrected, and v) subtracting that part of said convex envelope data which lies below said spectrum from said stored spectral data in said portion to be corrected so that the stored spectral data represents a corrected spectrum.