G - Physics – 07 – D
Patent
G - Physics
07
D
G07D 7/00 (2006.01) G07D 7/12 (2006.01)
Patent
CA 2700616
The invention discloses an authentication device for the visual authentication of a document or item comprising a circular polarizing security marking, said device comprising a light source and polarization filters for the either parallel or alternate illumination of said marking on said document with left- and right -circular polarized light. Corresponding methods for the visual and the automated authentication of the marking are disclosed as well. Image
L'invention concerne un dispositif d'authentification pour l'authentification visuelle d'un document ou d'un article, comprenant un marquage de sécurité à polarisation circulaire, ledit dispositif comprenant une source de lumière et des filtres de polarisation pour l'éclairage soit parallèle soit alterné dudit marquage sur ledit document avec une lumière polarisée de façon circulaire à droite et à gauche. L'invention concerne également des procédés correspondants pour l'authentification visuelle et l'authentification automatique du marquage.
Callegari Andrea
Decoux Eric
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Sicpa Holding Sa
LandOfFree
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