Holographic labeling and reading machine for authentication and

Details Holographic labeling and reading machine for authentication and Holographic labeling and reading machine for authentication and

1996-10-23

1999-07-06

Lee, Michael G.

Registers

Coded record sensors

Particular sensor structure

235454, 235490, 235495, 359 1, G06K 710

Patent

active

059200588

ABSTRACT:
A holographic security label and automated reading machine for marking and subsequently authenticating any object such as an identification badge, a pass, a ticket, a manufactured part, or a package is described. The security label is extremely difficult to copy or even to read by unauthorized persons. The system comprises a holographic security label that has been created with a coded reference wave, whose specification can be kept secret. The label contains information that can be extracted only with the coded reference wave, which is derived from a holographic key, which restricts access of the information to only the possessor of the key. A reading machine accesses the information contained in the label and compares it with data stored in the machine through the application of a joint transform correlator, which is also equipped with a reference hologram that adds additional security to the procedure.

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J R. Thoma, M. Dratz, N. Hampp, "All-optical nonlinear holographic correlation using bacteriorhodopsin films," Optical Engineering, v. 34, n. 5, pp. 1345-1351 (May 1995).

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