Patent ID: 6417968
Filing Date: 2002-07-09
Classification: B42D,G02B,G06K

Abstract:
A surface pattern comprising surface elements which are arranged in a mosaic-like fashion and which have microscopic relief structures and of which a plurality of divided surface elements is subdivided at least into first and second surface portions and the divided surface elements include asymmetrical diffraction gratings which have an optical-diffraction effect, wherein in the subdivided divided surface elements adjacent first surface portions are separated by second surface portions and the grating vectors of the asymmetrical diffraction gratings of the first surface portions and the second surface portions differ in respect of azimuth, wherein the asymmetrical diffraction gratings of the first surface portions of all divided surface elements have the same first value in respect of azimuth and the asymmetrical diffraction gratings of the second surface portions of all divided surface elements have the same second value in respect of azimuth, whereinthe relationship of the sum of all first surface portions of the N-th divided surface element relative to the total area of the N-th divided surface element forms a surface proportion value AN specific to the N-th divided surface element, and along a predetermined marked axis all divided surface elements are arranged in accordance with their surface proportion value AN between the divided surface elements with the surface proportion value AN=0 and AN=1 in the mosaic of all elements.