Optical signature system and method

Details Optical signature system and method Optical signature system and method

2011-07-12

2011-07-12

Hess, Daniel A (Department: 2876)

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Particular code pattern

C235S491000

Reexamination Certificate

active

07975929

ABSTRACT:
A system and method for creating a unique optical signature that use an unstructured, random arrangement of objects, such as optical beads. Disturbance of the arrangement of the objects irreversibly changes the unique optical signature that is created, effectively preventing replication of the unique optical signature if the arrangement of the objects is disturbed. The disturbance and resulting destruction of the optical signature can occur without the application or presence of electrical power.

REFERENCES:
patent: 7184622 (2007-02-01), Uhlhorn et al.
patent: 7353994 (2008-04-01), Farrall et al.
Co-pending U.S. Appl. No. 12/146,836, filed Jun. 26, 2008.

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