Patent ID: 6584413
Filing Date: 2003-06-24
Classification: G01J,G06K

Abstract:
A spectrum analyzer for determining the properties of a sample from measured spectral data collected from the sample; comprising:input/output means for inputting the measured spectral data; memory means for storing the measured spectral data; means for loading data into memory via the input/output means; and computer processor means for reading the memory and executing software instructions to perform a method of determining the properties of a sample from measured spectral data collected from the sample; comprising: a) providing a two-dimensional matrix A containing measured spectral data; b) generating a weighted spectral data matrix D by weighting matrix A; c) factoring D into the product of two matrices, C and ST, by performing a constrained alternating least-squares analysis of D=CST, where C is a concentration intensity matrix and S is a spectral shapes matrix; d) unweighting C and S by applying the inverse of the weighting used in step b); and e) determining the properties of the sample by inspecting C and S.