Personal authentication method and personal authentication...

Optics: measuring and testing – Document pattern analysis or verification

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C356S039000

Reexamination Certificate

active

07817256

ABSTRACT:
A personal authentication method is provided that includes imaging, on an image sensor as a laser speckle using an optical system, light reflected from a blood vessel layer in subcutaneous and internal tissues when a laser beam is expanded and made to irradiate a finger pad, calculating a quantity that represents the rate of change with respect to time of the amount of light received for each pixel of the laser speckle, obtaining a finger pad blood flow map as a two-dimensional map of the numerical values, and comparison-checking the blood flow map against pre-registered data of individuals, wherein using a near-infrared laser beam or using this in combination with a visible laser beam, comparison-checking against pre-registered data of individuals is carried out using a pattern reflecting a fingerprint occurring within the finger pad blood flow map obtained from reflected light and, observed superimposed thereon, an internal tissue blood flow distribution pattern, and there is also provided a device used for the method.

REFERENCES:
patent: 5339817 (1994-08-01), Nilsson
patent: 7447408 (2008-11-01), Bouma et al.
patent: 2-5190 (1990-01-01), None
patent: 4-242628 (1992-08-01), None
patent: 5-28133 (1993-04-01), None
patent: 5-28134 82 (1993-04-01), None
patent: 5-73666 (1993-10-01), None
patent: 8-16752 (1996-01-01), None
patent: 8-112262 (1996-05-01), None
patent: 2003-85538 (2003-03-01), None
patent: 2003-164431 (2003-06-01), None
patent: 2003-180641 (2003-07-01), None
patent: 2003-527906 (2003-09-01), None
patent: 2003-331268 (2003-11-01), None
patent: 2004-290664 (2004-10-01), None
patent: 2004-326820 (2004-11-01), None
patent: 2005-527874 (2005-09-01), None
patent: 03/025836 (2003-03-01), None
patent: 2005/122896 (2005-12-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Personal authentication method and personal authentication... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Personal authentication method and personal authentication..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Personal authentication method and personal authentication... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4151693

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.