发明名称 OPTICAL DIFFRACTION SECURITY ELEMENT
摘要 1. A diffraction-optical security element for indentifying the authenticity of documents, means of payment, goods and the like, comprising a reflecting phase diffraction structure (10) which is determined by the surface structure of a discontinuous reflection layer (8) embedded in a dielectric layer (7) and by the spacing (d) from a second reflection layer (6) characterized in that the second reflection layer is a continuous reflection layer (6) arranged on a surface of the dielectric layer (7).
申请公布号 EP0151706(A3) 申请公布日期 1985.10.02
申请号 EP19840113890 申请日期 1984.11.16
申请人 LGZ LANDIS & GYR ZUG AG 发明人 GREENAWAY, DAVID L.
分类号 B42D25/328;B42D25/42;B42D25/43;D21H21/48;G02B5/18;G06K1/12;G06K19/10;G06K19/16;G07F7/08 主分类号 B42D25/328
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