Personal authentication device
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United States of America Patent
Stats
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Jun 26, 2012
Grant Date -
Feb 28, 2008
app pub date -
Oct 17, 2007
filing date -
Mar 4, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A compact authentication device that prevents user from feeling pressure and is strong against external light, when capturing an image of a finger blood vessel pattern with transmitted light. The device includes a guidance part for determining the finger position, a light source disposed on at least one side of the guidance part to emit light to be transmitted though the finger, an image capture part for capturing the transmitted light, a shading unit for limiting an irradiation region of the light, a finger thickness measuring unit, a unit for controlling a light amount of the light source based on a result of the measurement, a unit for recording registered image patterns of the finger, a unit for collating a captured image pattern from the image capture part with the registered patterns, and a unit for controlling different processing according to the collation result.
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Family
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