Diffractive surfaces with color shifting backgrounds

Details Diffractive surfaces with color shifting backgrounds Diffractive surfaces with color shifting backgrounds

B - Operations, Transporting

42

D

B42D 15/10 (2006.01)

Patent

CA 2378502

A security article (10) includes a light transmissive substrate (14) having a first surface and an opposing second surface, with the first surface having an embossed region with an optical diffraction pattern or a holographic image pattern (15). A color shifting optical coating (16) is formed on the substrate such as on the opposing second surface, with the optical coating providing an observable color shift as the angle of incident light or viewing angle changes. The security article can be used in a variety of applications and products to provide for enhanced security measures such as anticounterfeiting.

Cette invention concerne un article de sécurité (10) comprenant un substrat émetteur de lumière (14) qui présente une première surface et une seconde surface opposée à la première. La première surface comporte une région estampée avec un motif de diffraction optique ou un motif d'image holographique (15). Un revêtement optique à changement de couleur (16) est formé sur un substrat tel que la seconde surface opposée, le revêtement optique accusant un changement de couleur visible lorsque l'angle de la lumière incidente ou l'angle d'observation change. L'article de sécurité selon l'invention convient pour toutes sortes d'applications et de produits et s'emploie à des fins de sécurité, notamment contre les contrefaçons.

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