Optics: measuring and testing – By dispersed light spectroscopy – With raman type light scattering
Patent
1987-08-14
1989-08-15
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With raman type light scattering
356310, 356333, G01N 2165
Patent
active
048568970
ABSTRACT:
An improved Raman spectrometer device is provided which provides useful spectral information in situations where Raman spectroscopy has heretofore been unworkable. The spectrometer of the invention makes use of a stationary electrooptical masking device in lieu of conventional slit scanning optics, with the mask being computer controlled to provide a multiplexing function, typically employing Hadamard mathematics. The stationary encoding mask permits use of a relatively inexpensive photodiode detector, as compared with photomultiplier tubes conventionally used in Raman instrumentation. Advantageously, unwanted Rayleigh scattered radiation can be completely eliminated, either by blanking those zones of the mask receiving such radiation, or physically locating the device in such orientation that the Rayleigh scattered radiation does not pass through operative portions of the mask.
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Fateley William G.
Tilotta David C.
D.O.M. Associates, Inc.
McGraw Vincent P.
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