发明名称 |
OPTISCHE SICHERHEITSARTIKEL UND VERFAHREN ZU IHRER HERSTELLUNG |
摘要 |
<p>Optical security articles and methods of making same are described comprising a first layer substantially transparent to visible light and having a first refractive index, the first layer having a relief pattern on a first surface thereof and a substantially smooth second surface, and an adhesive layer coterminating with the first layer. The adhesive layer substantially completely fills and makes contact with a first portion of the plurality of geometric concavities, the adhesive layer having a second refractive index which is substantially similar to the first refractive index of the first layer. A second portion of the plurality of geometric concavities are precluded from contact with the adhesive layer by a corresponding plurality of separation layers, each separation layer having a separation layer refractive index which is different from the refractive index of the first layer.</p> |
申请公布号 |
DE69508607(T2) |
申请公布日期 |
1999.07.29 |
申请号 |
DE1995608607T |
申请日期 |
1995.09.21 |
申请人 |
MINNESOTA MINING AND MFG. CO., SAINT PAUL, MINN., US |
发明人 |
LU, SHIH-LAI, SAINT PAUL, MN 55133-3427, US |
分类号 |
B32B7/02;B42D15/00;B42D15/10;C09J7/02;C09J123/00;C09J201/00;G02B5/124;(IPC1-7):B42D15/10 |
主分类号 |
B32B7/02 |
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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