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Multiplexed pathlength resolved noninvasive analyzer apparatus and method of use thereof

  • US 9,351,671 B2
  • Filed: 09/22/2014
  • Issued: 05/31/2016
  • Est. Priority Date: 07/16/2012
  • Status: Expired due to Fees
First Claim
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1. An apparatus for noninvasive estimation of an analyte concentration of a human subject, comprising:

  • a near-infrared noninvasive analyzer, comprising;

    a near-infrared source;

    a photon transport system configured to transport photons from said near-infrared source to an illumination zone;

    a two-dimensional planar transmittance filter array comprising;

    a first filter comprising a first fifty percent cut-on transmittance inflection point at a first wavelength in a range of 1200 to 2500 nanometers;

    a second filter comprising a second fifty-percent cut-on transmittance inflection at a second wavelength, said second wavelength at least one hundred nanometers shorter than said first wavelength,said first filter positioned closer to the illumination zone than said second filter; and

    a detector, said detector configured to detect a sub-set of the photons after the photons undergo diffuse reflection and arrive at a detection zone, both the illumination zone and the detection zone in proximate contact with the subject during use,said two-dimensional planar transmittance filter orientated substantially parallel to a line from the illumination zone to the detection zone.

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