Security document with optically excitable dyes for authenticity check
AssigneeBundesdruckerei GmbH
InventorsRoland Gutmann, Benedikt Ahlers, Frank Kappe, Ralf Paugstadt, Arnim Franz-Burgholz
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Abstract
A security document with optically excitable dyes for authenticity checking. Dyes are applied to or embedded in the security documents. The dyes are advantageously embedded in a carrier material which in conjunction with the dyes forms a laser-active element. Certain optically excitable dyes are incorporated in a security document in such a way that when the security and/or sensitive document is optically excited, the dyes embedded in the security and/or sensitive document resonate with the material of the securities and secure documents, so that a well-defined narrow spectrum of all excited materials is emitted.
Claims12
A security document comprising at least one optically excitable dye having a first emission characteristic for authenticity checking;
- a carrier material;
- the at least one optically excitable dye is embedded in the carrier material and, in conjunction with the carrier material, forms a laser-active element;
- and
- wherein the at least one dye is embedded in a resonator comprising a coating of reflecting layers disposed on both sides of the carrier material containing the at least one dye.
A security document comprising
- two optically excitable dyes having each a different emission characteristic for authenticity checking;
- a carrier material;
- said two optically excitable dyes are each embedded in the carrier material and, in conjunction with the carrier material, form a laser-active element;
- and wherein the two optically excitable dyes are embedded in a resonator comprising a coating of reflecting layers disposed on both sides of the carrier material containing each of the two dyes.
The security document according to 9, wherein the document comprised paper including paper additives and wherein the at least one dye, pigment platelets and pigment particles are incorporated in the paper additives.
Dependencies are inferred from the claim text.