Optics: measuring and testing – Document pattern analysis or verification
Reexamination Certificate
2004-06-21
2010-06-01
Punnoose, Roy (Department: 2886)
Optics: measuring and testing
Document pattern analysis or verification
Reexamination Certificate
active
07728959
ABSTRACT:
An apparatus for image acquisition of topological features of the surface of skin. The apparatus comprises a waveguide, having an entrance edge and top and bottom surfaces; a light source, configured to direct a light beam at the entrance edge of the waveguide; a skin contact layer, disposed at or near the top surface of the waveguides; a holographic optical element (HOE), disposed at the top or at the bottom surfaces of the waveguide, configured to diffract the light beam incident from the light source to the skin contact layer; a sensor array, configured to detect light reflected from the surface of skin in contact with skin contact layer; and means for compensating for changes in the Bragg matching condition of the HOE due to temperature.
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Berg John S.
Fedele Vincent
Ingwall Richard T.
Joseph Joby
Kent David L.
Aprilis, Inc.
Punnoose Roy
Weaver Austin Villeneuve & Sampson LLP
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