发明名称 |
INFORMATION CARRIER COMPRISING A NON-CLONABLE OPTICAL IDENTIFIER |
摘要 |
The invention relates to an information carrier containing a non-clonable optical identifier (2) having an optical scattering medium (3) for being challenged by a light beam (5) and for scattering said light beam (5). In order to provide a secure information carrier (1), it is proposed that it further comprises a light absorbing means (3, 4) for reducing the intensity of said light beam (5) so that an integration time for obtaining a response signal by integrating the scattered light beam (8) is extended.
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申请公布号 |
KR20060098381(A) |
申请公布日期 |
2006.09.18 |
申请号 |
KR20067009391 |
申请日期 |
2006.05.15 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
TUYLS PIM T.;SKORIC BORIS;STALLINGA SJOERD;OPHEY WILLEM G.;AKKERMANS ANTONIUS H. M.;DE JONGH PETRA E. |
分类号 |
G06K19/06;G06K7/10;G06K7/12;G07D7/12 |
主分类号 |
G06K19/06 |
代理机构 |
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地址 |
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