B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
B41M 5/24 (2006.01) B41M 3/14 (2006.01) B42D 15/00 (2006.01) B42D 15/10 (2006.01) B44F 1/12 (2006.01) G02B 5/18 (2006.01) G02B 5/32 (2006.01)
Patent
CA 2377522
A method of producing a security document or device comprising a substrate and an optically diffractive device, the method comprising the step of: irradiating an area of the substrate (2) on one surface with patterned laser radiation to ablate selected portions of the surface and thereby form an optically diffractive structure in said one surface. A method of producing a security document or device comprising a substrate and an optically variable device, such as a means for creating polarisation patterns, the method comprising the step of: exposing an area of the substrate on one surface to a light source which causes photo-polymerisation of the substrate which in turn produces a polarisation state or pattern.
Ce procédé de production d'un document ou dispositif de sécurité se composant d'un substrat et d'un élément de diffraction optique comprend l'étape suivante consistant à soumettre à un rayonnement une zone du substrat (2) sur une surface, à l'aide d'un rayonnement laser à motif, afin d'enlever des portions choisies de cette surface et donc de former une structure de diffraction optique dans celle-ci. L'invention concerne également un procédé de production d'un document ou dispositif de sécurité comprenant un substrat et un dispositif variant sur le plan optique, comme un élément de création de motifs de polarisation, ce procédé comprenant l'étape consistant à exposer une zone du substrat sur une surface à une source lumineuse, laquelle provoque la photopolymérisation du substrat, lequel à son tour produit un état ou motif de polarisation.
Power Gary Fairless
Zientek Paul
Robic
Securency International Pty Ltd
Securency Pty Limited
LandOfFree
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