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BIOMETRIC OBJECT SENSOR AND METHOD

  • US 20130258086A1
  • Filed: 02/08/2013
  • Published: 10/03/2013
  • Est. Priority Date: 03/27/2012
  • Status: Active Grant
First Claim
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1. A biometric image sensor comprising:

  • a first light source having a first wavelength λ

    1;

    a second light source having a second wavelength λ

    2;

    a photodetector configured and positioned to receive light of the first wavelength λ

    1 and light of the second wavelength λ

    2 reflecting from a biometric object being imaged and to produce a first output indicative of the amount of reflectance of the light of the first wavelength λ

    1 and a second output indicative of the amount of reflectance of the light of the second wavelength λ

    2; and

    a computing device configured to compare the difference between the first output and the second output with an authenticity threshold.

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