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Spectroscopic optical system

  • US 7,873,397 B2
  • Filed: 06/19/2007
  • Issued: 01/18/2011
  • Est. Priority Date: 06/19/2007
  • Status: Active Grant
First Claim
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1. A method of performing Raman spectroscopy, comprising the steps of:

  • illuminating a target with light from a light source, with at least some of the light penetrating the target;

    collecting, with collection optics, at least a portion of the light that penetrates the target from a region on the target'"'"'s surface not directly illuminated by the step of illuminating, wherein at least a majority of the light collected by the step of collecting is light that penetrates the target;

    analyzing, with Raman spectroscopic instrumentation, a spectrum of at least a portion of the light collected by the step of collecting; and

    wherein the light that illuminates the target is in a pattern that partially but not completely surrounds the region from which the portion of the light that penetrates the target is collected.

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