Patent ID: 8786521
Filing Date: 2014-07-22
Classification: B42D,G02B,Y10T

Abstract:
1. A security element for security papers, value documents, or other non-transitory data carriers, the security element comprising: (A) a motif layer including a motif image that is subdivided into a plurality of cells, in each of which are arranged imaged regions of a planar target image defined by an image function f(x,y), (B) a viewing grid composed of a plurality of viewing elements for reconstructing the target image when the motif image is viewed with the aid of the viewing grid, the motif image of the motif layer having an image function m(x,y) that is given by wherein wherein the reconstructed planar target image either exhibits no periodicity, or exhibits a periodicity that is described by a 2×2 matrix P, wherein the periodicity unit cell is not equal to (A−I) W.