Copy-protected document and method for obtaining same

Details Copy-protected document and method for obtaining same Copy-protected document and method for obtaining same

B - Operations, Transporting

42

D

B42D 15/00 (2006.01) B42D 15/10 (2006.01)

Patent

CA 2151238

A copy-protected document (4) and a method for obtaining same. No accurate copy of said document can be obtained, in particular when using a colour photocopier. The document comprises an interference network (14) produced for instance holographically and designed to disrupt a directed light beam and cause blotching on any attempted copy of the original document (4).

L'invention concerne un document protégé contre la reproduction et un procédé d'obtention d'un tel document (4). Le document suivant l'invention empêche l'obtention d'une copie fidèle, notamment lors de l'emploi d'une photocopieuse couleur. Le document comporte un réseau d'interférences (14) obtenu par exemple par holographie qui interfère avec un faisceau de lumière dirigé de façon à provoquer l'apparition de taches sur toute tentative de copie du document original (4).

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