SELF-AUTHENTICATING DOCUMENTS WITH PRINTED OR EMBOSSED HIDDEN IMAGES

摘要

A self-authenticating article comprising a substrate having an image receiving surface and a lenticular lens is provided. The lenticular lens has a predetermined lens frequency and is configured for optically decoding encoded indicia viewed therethrough. The lens is attached to the substrate so that the lens can be selectively positioned to overlie the image receiving surfac to decode encoded indicia printed thereon. The self-authenticating apicle further comprises an encoded image on the image receiving surface, the encoded image comprising at least one of th set consisting of printed indicia and indicia formed as variations in surface geometry of the imæ receiving surface. The surface geometry variations may comprise raised and non-raised areas surface areas that combine to define at least a portion of the indicia.