Live print scanner with holographic platen

Details Live print scanner with holographic platen Live print scanner with holographic platen

2007-05-22

2007-05-22

Boutsikaris, Leonidas (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C359S015000, C382S124000, C382S125000

Reexamination Certificate

active

11209038

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 live print scanning system for generating a high contrast print image is presented. The system includes a flatbed scanner with a scanning surface and an image sensor, a holographic platen placed on the scanning surface, and a reference beam source that provides a reference beam to the holographic platen. A high contrast print image of a biometric object that is placed on the holographic platen is obtained at the image sensor. A method for generating a high contrast print image is also presented.

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Hariharan, P.,Basics of Holography, University Press, Cambridge, United Kingdom, pp. v-ix, 1-14 and 102-111 (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. 11/209,037, inventors Carver, J., et al., filed Aug. 23, 2005, entitled “Live Print Scanner with Holographic Imaging at Different Magnifications” (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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