Optics: measuring and testing – Document pattern analysis or verification
Reexamination Certificate
2007-01-09
2010-10-19
Punnoose, Roy (Department: 2886)
Optics: measuring and testing
Document pattern analysis or verification
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.
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Fujii Hitoshi
Konishi Naoki
Kyushu Institute of Technology
Punnoose Roy
Sughrue & Mion, PLLC
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