Combined total-internal-reflectance and tissue imaging systems and methods
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United States of America Patent
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Mar 25, 2008
Grant Date -
Sep 22, 2005
app pub date -
Dec 17, 2004
filing date -
Apr 4, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and systems are provided for combining total-internal-reflectance and tissue imaging to perform biometric functions. The system may include an illumination source, a platen, a light detector, an optical train, and a computational unit. The platen is disposed to make contact with a skin site of an individual. The optical train is disposed to provide optical paths between the illumination source and the platen, and between the platen and the light detector. The combination of the illumination source and optical train provides illumination to the platen under multispectral conditions. The computational unit is interfaced with the light detector and has instructions to generate a total-internal-reflectance image of the skin site from a first portion of light received from the skin site, and to generate a tissue image of the skin site from a second portion of light received from the skin site.
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