Optics: measuring and testing – By dispersed light spectroscopy – With raman type light scattering
Patent
1994-05-27
1995-10-03
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With raman type light scattering
G01J 344, G01N 2165
Patent
active
054556732
ABSTRACT:
A Raman spectrometry apparatus that is capable of measuring and compensating for variabilities in the apparatus comprises a source of substantially monochromatic radiation, means for simultaneously interfacing the radiation with a sample and a reference material, means for simultaneously acquiring at more than one wavelength a convolved Raman spectrum of the sample and a convolved spectrum of the reference material, and means for determining the convolution function of the convolved spectra and applying the convolution function to adjust the convolved Raman spectrum of the sample to produce thereby the standard Raman spectrum of the sample. A method for obtaining the standard Raman spectrum of a sample comprises:
(a) simultaneously irradiating the sample and a reference material with a substantially monochromatic radiation source;
(b) simultaneously acquiring at more than one wavelength a convolved Raman spectrum of the sample and a convolved spectrum of the reference material;
(c) choosing the standard spectrum of the reference material;
(d) from the convolved Raman spectrum of the sample and the convolved spectrum of the reference material and the standard spectrum of the reference material, determining the convolution function of the convolved spectra; and
(e) applying the convolution function to adjust the convolved Raman spectrum of the sample to produce thereby the standard Raman spectrum of the sample.
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Alsmeyer Daniel C.
Gala Brinda A.
Nicely Vincent A.
Eastman Chemical Company
Evans F. L.
Gwinnell Harry J.
Stevens John F.
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