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Non-invasive testing

  • US 5,321,265 A
  • Filed: 07/15/1992
  • Issued: 06/14/1994
  • Est. Priority Date: 07/15/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus determining the concentration in a sample of a constituent of interest which has absorption or reflectance bands in a selected region of the spectrum comprising:

  • a light source that illuminates said sample with broad spectrum radiation in said selected region;

    a sample chamber for confining said sample during said illumination;

    detection means in the form of a plurality of detector units, each of said detector units being responsive to a specific region of said spectrum and having a partial overlapping region of spectral response with another of said detector units, said response from each detector unit being in the form of an output signal; and

    analysis means for converting said output signals into a measure of said concentration.

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