A Computer Controlled Raman Spectrometer System

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Abstract:

We describe a software system and a hardware interface between a laser Raman spectrometer and a time-shared computer. This data acquisition system controls the wavelength drive of the spectrometer and the analyzer orientation using stepping motors and position sensors. With this method accurate depolarization ratios can be determined at every wavelength increment. Digitized photon counting gives good signal/noise ratios and a wide dynamic range for Raman intensity measurements. The software design permits automatic separation of isotropic and anisotropic spectra, repetitive counting periods, instant scope display of raw, reduced or integrated data, and numerous data refinement options.

Keywords: Computerization; Data acquisition; Raman spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370276774457362

Affiliations: Western Regional Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Berkeley, California 94710

Publication date: May 1, 1976

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