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Optical spectroscopy pathlength measurement system

  • US 7,801,581 B2
  • Filed: 12/11/2006
  • Issued: 09/21/2010
  • Est. Priority Date: 08/18/2000
  • Status: Expired due to Fees
First Claim
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1. An optical pathlength measurement system for determining a pathlength of a light source passing through a tissue sample comprising:

  • an optical emitter for emitting light of one or more wavelengths;

    a first filter for filtering the light emitted from the optical emitter;

    a magnetic field generator for optically rotating the light as it passes through a tissue sample;

    a second filter for filtering the light after it passes through the tissue sample;

    a detector for detecting the light after it passes through the second filter; and

    a processor for determining and outputting a pathlength of the light emitted from the optical emitter based on the optical rotation of the light for use in determining a physiological characteristic of the tissue sample.

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