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White-light spectral biometric sensors

  • US 8,184,873 B2
  • Filed: 06/14/2010
  • Issued: 05/22/2012
  • Est. Priority Date: 04/04/2003
  • Status: Active Grant
First Claim
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1. A noncontact biometric system comprising:

  • an illumination source configured to illuminate a purported skin site of an individual with light having a first polarization condition, wherein the purported skin site is positioned to interact with the polarized light while not being in contact with any solid surface;

    a detection subsystem configured to collect light scattered from the purported skin site having a second polarization condition; and

    a computational unit interfaced with the detection subsystem configured to;

    derive a plurality of spatially distributed images of the purported skin site from the received light, andanalyze the plurality of spatially distributed images to perform a biometric function.

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