Patent Number: 6,165,592

Title: Document with doped optical security attribute, layer composite for making same and test device for testing the document for authenticity

Abstract: A document, for example a bank note, a check, a credit card, an identification document or a ticket, bears an optical safety mark in the form of a light-reflecting and light-diffracting and/or refracting layer, for example a hologram, an interference layer, a (computer-generated) refracting structure, located on at least parts of the document. The optical safety mark is arranged in a sandwich structure which is fixed to the document by means of an adhesive layer and if required has one or several transparent layers arranged in the sandwich structure. The adhesive layer and/or transparent layer in the sandwich structure is doped with at least one luminescent substance.

Inventors: Berger; Erich (Vienna, AT), Fajmann; Peter (Herzogenburg, AT)

Assignee: Oesterreichische Nationalbank

International Classification: B42D 15/00 (20060101); B42D 15/10 (20060101); B32B 005/16 (); B42D 015/00 ()

Expiration Date: 12/26/2017