Live print scanner with holographic imaging a different...

Optical: systems and elements – Holographic system or element – Authentication

Reexamination Certificate

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C359S015000, C382S124000, C382S125000

Reexamination Certificate

active

11209037

ABSTRACT:
This invention relates to the use of holographic optical elements in the design and application of biometric scanning instruments used typically for capturing biometric information such as fingerprints and handprints. A system and method for capturing print images from select areas of a platen are presented. The system includes a reference beam source that provides a reference beam, holographic material that receives the reference beam, a platen on a surface of the holographic material that receives a biometric object, and an image sensor. Variations in orientation of the reference beam cause differing areas of the platen to be mapped onto the image sensor, thereby obtaining both different image translations and magnifications of at least a portion of the biometric object.

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Hariharan, P.,Basics of Holography,University Press, Cambridge, United Kingdom, pp. v-ix, 1-14 and 102-111 (2002).
Hecht, E.,Optics, 4thEdition, Addison Wesley, San Francisco, CA, pp. 623-639 (2002).
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Co-pending U.S. Appl. No. 11/208,851, inventors Carver, J., et al., filed Aug. 23, 2005, entitled “Optical Comparator and Method to Compare Biometric Information” (available in the Image File Wrapper in Private PAIR).
Co-pending U.S. Appl. No. 11/209,033, inventors Carver, J., et al., filed Aug. 23, 2005, entitled “Systems and Methods of Capturing Prints with a Holographic Optical Element” (available in the Image File Wrapper in Private PAIR).
Co-pending U.S. Appl. No. 11/209,038, inventors Carver, J., et al., filed Aug. 23, 2005, entitled “Live Print Scanner with Holographic Platen” (available in the Image File Wrapper in Private PAIR).
Co-pending U.S. Appl. No. 11/209,048, inventors Carver, J., et al., filed Aug. 23, 2005, entitled “Live Print Scanner with Active Holographic Platen” (available in the Image File Wrapper in Private PAIR).

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