Security element
AssigneeGiesecke & Devrient GmbH
InventorsWittich Kaule, Wolfgang Rauscher
Life of this patent
Estimating the term…
Abstract
The present invention relates to a security element (20) for security papers, value documents and the like, having a micro-optical moiré magnification arrangement having a motif image that consists of a periodic or at least locally periodic arrangement of a plurality of micromotif elements (28) that is planar or applied on a curved surface, and a periodic or at least locally periodic arrangement of a plurality of microfocusing elements (24) that is planar or applied on a curved surface, for moiré-magnified viewing of the micromotif elements (28) of the motif image, the arrangement of micromotif elements (28) and/or the arrangement of microfocusing elements (24) exhibiting, in the planar case, no symmetry axis in the plane of the arrangement in its periodic or at least locally periodic regions.
Claims46
A security element for security papers, value documents and the like, having a micro-optical moiré magnification arrangement having
- a motif image that consists of a periodic or at least locally periodic arrangement of a plurality of micromotif elements that is planar or applied on a curved surface, and
- a periodic or at least locally periodic arrangement of a plurality of microfocusing elements that is planar or applied on a curved surface for moiré-magnified viewing of the micromotif elements of the motif image,
- the arrangement of micromotif elements and/or the arrangement of microfocusing elements exhibiting, in the planar case, no symmetry axis in the plane of the arrangement in its periodic or at least locally periodic regions.
A method for manufacturing a security element having a micro-optical moirémagnification arrangement, in which a motif image that consists of a periodic or at least locally periodic arrangement of a plurality of micromotif elements that is planar or applied on a curved surface, and a periodic or at least locally periodic arrangement of a plurality of microfocusing elements that is planar or applied on a curved surface, are arranged in such a way that the micromotif elements are perceptible in magnification when viewed through the microfocusing elements, and the arrangement of micromotif elements and/or the arrangement of microfocusing elements being chosen such that they exhibit, in the planar case, no symmetry axis in the plane of the arrangement in their periodic or at least locally periodic regions.
Dependencies are inferred from the claim text.