"In-line" spectral reference method for spectrometers

Details "In-line" spectral reference method for spectrometers "In-line" spectral reference method for spectrometers

1990-03-02

1991-06-04

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

356326, 356243, G01J 342

Patent

active

050209094

ABSTRACT:
An in-line spectral method adapted for use with a single-beam reference spectrometer scanning a sample, the method comprising the steps of (a) scanning with a single-beam spectrometer (b) rotating a wheel in synchronization and in an optical path with the single-beam spectrometer of step (a), the wheel having open alternating with segments comprising reference material, (c) producing with step (b) alternate spectral scans as of the spectrometer and the sample, and of the spectrometer, the sample and said reference material, (d) comparing said spectral scans of step (c) in order to extract the spectrum of said reference material; and (e) using said extracted spectrum for real-time, dynamic spectral compensation, to result in absolute correct sample spectrum.

REFERENCES:
patent: Re27270 (1972-01-01), Selgin
patent: 3861788 (1975-01-01), Webster
patent: 3973849 (1976-08-01), Jackson et al.
patent: 4264205 (1981-04-01), Landa
patent: 4285596 (1981-08-01), Landa
patent: 4529308 (1985-07-01), Rife
patent: 4937448 (1990-06-01), Mantz et al.

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