Patent ID: 6924934

Claim:
A diffractive security element comprising a plastic laminate with a surface pattern which is composed mosaic-like at least from surface elements wherein in the surface elements a reflecting interface between a shaping layer and a protective layer of the plastic laminate forms optically effective structures and light which is incident on the plastic laminate and which passes through a cover layer of the plastic laminate and through the shaping layer is deflected in a predetermined manner by means of the optically effective structures, wherein shaped in the surface of at least one of the surface elements is a diffraction structure which is produced by a superimposition of a linear asymmetrical diffraction grating with a matt structure, the linear asymmetrical diffraction grating has a spatial frequency from the range of values of between 50 lines/mm and 2,000 lines/mm, and the matt structure has a mean roughness value from the range of between 20 nm and 2,000 nm and at least in one direction a correlation length of between 200 nm and 50,000 nm.