发明名称 |
DIFFRAKTIVES SICHERHEITSELEMENT MIT EINEM HALBTONBILD |
摘要 |
A diffractive security element has a half-tone image comprising diffractive structures in a reflection layer, which are embedded in a layer composite between a transparent embossing layer and a protective lacquer layer. The half-tone image is divided into image elements of at least one dimension less than 1 mm, wherein the surface of each image element is divided up into a background field and an image element pattern. The proportion of the image element pattern to the surface of the image element determines the surface brightness of the half-tone image at the location of the image element. The background field has a first diffractive structure from which the image element pattern differs by its light-modifying effect. Pattern strips of a width of up to 0.3 mm additionally extend over the surface of the half-tone image. The pattern strips occupy a small proportion of the surface of the background fields and/or the image element patterns and produce coloured strips on the half-tone image. |
申请公布号 |
AT358598(T) |
申请公布日期 |
2007.04.15 |
申请号 |
AT20040797524T |
申请日期 |
2004.11.02 |
申请人 |
OVD KINEGRAM AG |
发明人 |
SCHILLING, ANDREAS;TOMPKIN, WAYNE, ROBERT |
分类号 |
B42D15/00;B42D15/10;(IPC1-7):B42D15/10;G02B5/32 |
主分类号 |
B42D15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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