Large-collection-area raman probe with reduced background fluorescence
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United States of America Patent
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Mar 18, 2014
Grant Date -
Nov 29, 2012
app pub date -
May 27, 2011
filing date -
May 27, 2011
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Abstract
A compact Raman analysis system combines a near-infrared (NIR) laser source, a 2D array collecting anti-Stokes Raman spectra, and a probe configured to measure complex solid samples, including pharmaceutical tablets and other large-area targets with reduced background fluorescence at relatively low cost. The system collects spectra from an area of 1-mm or greater, preferably 3-12 mm or more, facilitating the collection of statistically useful data from inhomogeneous and laser-sensitive samples, among other applications. Potential pharmaceutical applications include tablet dosage level measurements, as well as online and at-line quality-control (QC) monitoring opportunities. Other applications include tablet identification as a forensic tool to identify counterfeit pharmaceutical products; granulation and blend uniformity for improved formulation via better process understanding.
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