发明授权
- 专利标题: Method and device for checking authenticity of a security element
- 专利标题(中): 用于检查安全元件真实性的方法和设备
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申请号: US10522231申请日: 2003-07-24
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公开(公告)号: US07537161B2公开(公告)日: 2009-05-26
- 发明人: Karlheinz Mayer , Reinhard Plaschka , Georg Depta
- 申请人: Karlheinz Mayer , Reinhard Plaschka , Georg Depta
- 申请人地址: DE Munich
- 专利权人: Giesecke & Devrient GmbH
- 当前专利权人: Giesecke & Devrient GmbH
- 当前专利权人地址: DE Munich
- 代理机构: Rothwell, Figg, Ernst & Manbeck, P.C.
- 优先权: DE10233928 20020725
- 国际申请: PCT/EP03/08135 WO 20030724
- 国际公布: WO2004/011273 WO 20040205
- 主分类号: G06K7/14
- IPC分类号: G06K7/14
摘要:
The invention relates to a method, in which from two images of a security element, which are recorded with right-handed and left-handed circularly polarizing filters, a differential image is produced, on the basis of which the authenticity of the security element is tested, and an apparatus for carrying out the method.
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