Holographic image identification system

Details Holographic image identification system Holographic image identification system

1994-06-28

1996-10-29

Dzierzynski, Paul M.

Optical: systems and elements

Holographic system or element

Authentication

359 28, 235457, G03H 100, G03H 102, G06K 710

Patent

active

055702074

ABSTRACT:
A holographic image identification system includes an image reconstruction device having a laser beam source movable along an arc path to selectively project a laser beam onto a hologram located on the center of the arc path at a preselected incidental angle so as to form an image on a screen to be received by a charge coupling device which converts the image into an electrical signal and transmits the electrical signal to a computer to compare with a reference image stored in the storage memory of the computer. The incidental angle of the laser beam is also fed to the computer to compare with a pre-stored value associated with the reference image for double-check of the correctness of the holographic image.

REFERENCES:
patent: 3643216 (1972-02-01), Greenaway et al.
patent: 5262879 (1993-11-01), Davis
patent: 5291321 (1994-03-01), Noh
patent: 5306899 (1994-04-01), Marom et al.
patent: 5379131 (1995-01-01), Yamazaki

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