发明名称 Optically variable element comprising a sequence of thin-film layers
摘要 The invention concerns an optically variable element, in particular an optically variable safeguard element for safeguarding banknotes, credit cards and the like, and a security product and a foil, in particular an embossing foil or a laminating foil, with such an optically variable element. The optically variable element has a thin film layer ( 54, 55, 58 ) for producing color change by means of interference and a further layer ( 51, 52, 53, 59 ). The thin film is in the form of a partial thin film element which covers the surface region of the further layer only in region-wise and pattern-shaped manner.
申请公布号 KR100587984(B1) 申请公布日期 2006.06.08
申请号 KR20047018251 申请日期 2003.04.17
申请人 发明人
分类号 B42D25/21;B41M3/14;G07D7/12 主分类号 B42D25/21
代理机构 代理人
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