B - Operations – Transporting – 42 – D
Patent
B - Operations, Transporting
42
D
B42D 15/10 (2006.01) B42D 15/00 (2006.01)
Patent
CA 2705057
A method of forming an optically variable security device is provided. In the method, a photonic crystal material is provided and a process is performed upon the material which causes deformation of the material so as to form a first region (A) for which incident light received by the crystal material is selectively reflected or transmitted to generate a first optically variable effect, and a second region (B) for which incident light received generates an optical effect, different from the first optically variable effect. Corresponding devices having first and second regions are also disclosed.
La présente invention concerne un procédé de formation d'un dispositif de sécurité optiquement variable. Selon ce procédé, un matériau cristallin photonique est fourni et reçoit un traitement qui entraîne la déformation du matériau de manière à ce que soient formées une première région (A) pour laquelle la lumière incidente reçue par le matériau cristallin est réfléchie ou transmise de manière sélective pour générer un premier effet optiquement variable, ainsi qu'une seconde région (B) pour laquelle la lumière incidente reçue génère un effet optique, différent du premier effet optiquement variable. L'invention concerne également des dispositifs correspondants comportant des première et seconde régions.
Borden Ladner Gervais Llp
de La Rue International Limited
LandOfFree
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