Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrophotometer
Patent
1991-08-08
1994-10-18
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrophotometer
356402, G01J 342
Patent
active
053573366
ABSTRACT:
The system consists of a light source, a monochrometer, one or more etalons or other stable samples, a detector and a computer to store reference spectra, provide a read out indicative of the spectrum, and to change the instrument response. A transfer function is used to recharacterize the instrument's wavelength position and intensity response to match the actual spectrum with the standard spectrum. In one embodiment, the etalon is used in series with the unknown sample. A spectrum of the sample and etalon is created and is extracted from the spectrum of the sample alone to provide the actual spectrum of the instrument response to the etalon alone. The actual spectrum can then be compared to the standard spectrum and the instrument response recharacterized accordingly.
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Beebe Kenneth R.
Ruhl, Jr. Harry D.
Hantis K. P.
McGraw Vincent P.
The Dow Chemical Company
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