发明名称 |
OPTICAL STRUCTURE BODY FOR AUTHENTICATION, RECORDING MEDIUM FOR AUTHENTICATION, AND CONFIRMATION METHOD |
摘要 |
An optical structure 3 having a plurality of minute optical unit areas 4 is formed on a base 2. Each of the minute optical unit areas 4 has a plurality of minute areas A and B storing depth information representing multiple-valued phase information about a Fourier transformation image obtained through the Fourier transformation of an original image. In another embodiment of the present invention, the two adjacent minute optical unit areas 4 have a plurality of minute areas A and B storing depth information representing multiple-valued phase information about Fourier transformation images obtained through the Fourier transformation of different original images, respectively. <IMAGE> |
申请公布号 |
EP1435547(A1) |
申请公布日期 |
2004.07.07 |
申请号 |
EP20020801520 |
申请日期 |
2002.10.09 |
申请人 |
DAI NIPPON PRINTING CO., LTD. |
发明人 |
SUZUKI, SHIN-ICHIRO |
分类号 |
B42D15/10;G03H1/08;G03H1/16;G03H1/18;G03H1/26;G06K7/10;G06K19/06;G06K19/077;G06K19/10;G06K19/14 |
主分类号 |
B42D15/10 |
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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