Patent ID: 7654580
Filing Date: 2010-02-02
Classification: B41M,B42D,G07D,Y10S

Abstract:
1. A method of producing a self-authenticating article comprising: providing a document comprising a substrate having an image receiving surface and a decoder lens having a lens frequency and being configured for optically decoding corresponding encoded indicia viewed therethrough, the document being configured so that the decoder lens may be selectively positioned to overlie the image receiving surface to decode encoded indicia formed thereon; digitally encoding a source image to produce a rasterized encoded image having a raster frequency corresponding to the lens frequency; and applying the encoded image to the image receiving surface of the substrate, wherein the image receiving surface has a surface geometry that is initially substantially flat and the action of applying the encoded image includes reforming the surface geometry of the image receiving surface to include a plurality of alternating topographical features that collectively correspond to the encoded image.