System and method for robust fingerprint acquisition
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United States of America Patent
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Mar 24, 2009
Grant Date -
May 24, 2007
app pub date -
Nov 28, 2006
filing date -
Jun 1, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Combined multispectral and total-internal-reflectance biometric imaging systems are disclosed. A platen has multiple facets, at least one of which has a surface adapted for placement of a purported skin site by an individual and another facet may include an optical absorber. An illumination source and an optical arrangement are disposed to illuminate the purported skin site with light from the illumination source along distinct illumination paths, including paths at angles less than the critical angle and paths at angles greater than the critical angle. Both multispectral and total-internal-reflectance illumination are received by an imaging system. The imaging system may include first and second imaging locations adapted to record images from separate illumination paths. The platen may also include non parallel exits facets.
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