A security element (2) comprising a plastic laminate (1) has a surface pattern which is composed mosaic-like at least from surface elements, wherein in the surface elements a reflecting interface (8) between a shaping layer (5) and a protective layer (6) of the plastic laminate (1) forms optically effective...http://www.google.es/patents/US6924934?utm_source=gb-gplus-sharePatente US6924934 - Diffractive safety element
