×

Compact biometric authentication device and associated methodology of imaging and detecting living-tissue patterns

  • US 9,234,842 B2
  • Filed: 06/18/2014
  • Issued: 01/12/2016
  • Est. Priority Date: 05/09/2002
  • Status: Expired due to Term
First Claim
Patent Images

1. A device, comprising:

  • circuitry configured todetect a change in absorbance of a source light in blood of a user by detecting a difference in frequency between incident light and scattered light in the blood of the user, the difference in frequency based on an interference pattern between the incident light and the scattered light;

    determine whether there is an absence of blood flow based on the detected change in the absorbance of the source light in the blood;

    compare, when the absence of blood flow is not detected, the interference pattern with a reference interference pattern; and

    biometrically authenticate the user according to the comparison of the interference pattern with the reference interference pattern.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×