Invention Grant
US08411364B2 Security document with micro-prisms 有权
安全文件与微棱镜

Security document with micro-prisms
Abstract:
A security document including a substrate of transparent polymeric material, and opacifying layers provided on opposing sides of the substrate, the opacifying layers acting to guide light propagating within the substrate, wherein the substrate is formed with at least one micro-prism for diverting light propagating within or entering the substrate.
Public/Granted literature
Information query
Patent Agency Ranking
0/0