Optics: measuring and testing – Document pattern analysis or verification
Reexamination Certificate
2005-02-08
2005-02-08
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
Document pattern analysis or verification
C382S124000, C382S126000
Reexamination Certificate
active
06853444
ABSTRACT:
An optical system for imaging the features, ridges, and height variations of an object by exploiting the properties of specular reflection of light to maximize the contrast of the features, ridges, and height variations. The system provides a non-contact method of imaging objects suitable for biometric identification, such as the imaging of fingerprints. The system obtains the strong specular reflection using a properly shaped wave front. Optionally, the system can include a polarizer that filters and thereby enhances the specular reflection from the surface. Optionally, the system can also include pre-processing means for adjusting image brightness, contrast, and magnification.
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Beers Everitt
Nielsen John
Randick et al. McNichols
Toatley , Jr. Gregory J.
Valentin, II Juan
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