Boots – shoes – and leggings
Patent
1979-04-03
1981-05-12
Wise, Edward J.
Boots, shoes, and leggings
356325, G06F 1520
Patent
active
042675723
ABSTRACT:
Apparatus for determining the concentration of the various components of a sample, which includes a spectrophotometer for receiving a sample to be analyzed and performing extinctions of the sample at a plurality of preselected wavelengths to form a sample spectrum; memory devices for storing a standard spectra of each of the individual components; circuitry for weighting the sample spectrum at different wavelengths in conformity with each of the standard spectra and providing estimated values of the concentrations of the components from the sample spectra thus weighted; circuitry for reconstructing the sample spectrum as a linear combination of the estimated values of the concentrations and the standard spectra; a subtractor for forming a difference spectrum from the sample spectrum and the reconstructed sample spectrum; circuitry for weighting the difference spectrum at different wavelengths in conformity with each of the standard spectra and providing corrective values of the concentrations of the components from the difference spectrum thus weighted, and means for reconstructing the difference spectrum as a linear combination from the corrective values of the concentrations and the standard spectra; a subtractor for forming a second difference spectrum from the first difference spectrum and the reconstructed difference spectrum; updating means for correcting the estimated values by the corrective values, and a readout device for reading out the corrected values of the concentrations of the components.
REFERENCES:
patent: Re29138 (1977-02-01), Dill et al.
patent: 3553444 (1971-01-01), Tong
patent: 3717809 (1973-02-01), Laukien
patent: 4093991 (1978-06-01), Christei, Jr. et al.
patent: 4171913 (1979-10-01), Wildy et al.
Bodenseewerk Perkin-Elmer Co.
Giarratana Salvatore A.
Grimes Edwin T.
Masselle Francis L.
Wise Edward J.
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