Invention Grant
US07654580B2 Self-authenticating documents with printed or embossed hidden images 失效
具有打印或浮雕隐藏图像的自我认证文档

Self-authenticating documents with printed or embossed hidden images
Abstract:
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 surface to decode encoded indicia printed thereon. The self-authenticating article further comprises an encoded image on the image receiving surface, the encoded image comprising at least one of the set consisting of printed indicia and indicia formed as variations in surface geometry of the image 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.
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