G - Physics – 06 – K
Patent
G - Physics
06
K
G06K 19/00 (2006.01) B42D 15/00 (2006.01) B42D 15/10 (2006.01) G06K 1/02 (2006.01) G06K 19/06 (2006.01)
Patent
CA 2426227
The invention relates to a method for verifying the authenticity of a perforation pattern, which serves as a security characteristic, which permits the identification of an item of image information by viewing it when backlit by daylight, and which is provided in the substrate (1) of an, in particular, card-shaped document. Both the front side (2) as well as the rear side (3) of the substrate (1) are viewed in the area of the perforation pattern by frontlighting it with light of a defined wavelength, and the image inherent to the perforation pattern appears on the front side, whereas a surface corresponding to the area of the perforation pattern emerges on the rear side only in an unspecified manner.
L'invention concerne un procédé permettant de vérifier l'authenticité d'un modèle de perforation servant à une caractéristique de sécurité, qui permet d'identifier une information d'image par observation à contre-jour, dans le substrat (1) d'un document se présentant notamment sous forme de carte. La face avant (2), comme la face arrière (3) dudit substrat (1) sont observées dans la zone du modèle de perforation, avec une lumière réfléchie de longueur d'ondes définie. L'image inhérente au modèle de perforation se révèle sur la face avant, alors qu'il apparaît sur sa face arrière une surface correspondant à la zone du modèle de perforation, uniquement de manière non spécifiée.
Datacard Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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