发明名称 |
OPTICAL STRUCTURE, ESPECIALLY FOR A SECURITY DOCUMENT AND/OR A DOCUMENT OF VALUE |
摘要 |
An optical structure comprising first and second opposite outside faces, at least a first interface comprising a first screen of microreliefs and arranged in such a manner that travel through the first interface from the first outside face towards the second outside face, passes from a first medium having a first refractive index to a second medium having a second refractive index that is greater than the first, and at least one second interface comprising a second screen of microreliefs and arranged in such a manner that travel through the second interface from the first outside face towards the second outside face, passes from a third medium having a third refractive index to a fourth medium having a fourth refractive index less than the third. |
申请公布号 |
EP1951528(B2) |
申请公布日期 |
2015.06.24 |
申请号 |
EP20060831348 |
申请日期 |
2006.11.16 |
申请人 |
ARJOWIGGINS SECURITY |
发明人 |
CAMUS, MICHEL;ROSSET, HENRI |
分类号 |
B42D25/00;B42D15/00;G07D7/12 |
主分类号 |
B42D25/00 |
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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