Preserved and enhanced holographic and optically variable...

Details Preserved and enhanced holographic and optically variable... Preserved and enhanced holographic and optically variable...

2011-07-19

2011-07-19

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C156S209000, C283S086000

Reexamination Certificate

active

07982930

ABSTRACT:
An optically variable device has a substrate with an optically variable relief and a coating on the optically variable relief. The coating is applied as a liquid dispersion including a plurality of optical enhancer particles in a solvent.

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