发明名称 |
LATENT IMAGE CARRIER, PRODUCTION METHOD THEREOF, LATENT IMAGE READER, AND ITS READING SYSTEM |
摘要 |
There is provided a latent image carrier from which data can be reliably read for a long time. It includes a data storage layer (2) having a latent image pattern formed of fine phosphor paticles dispersed and held on a substrate (4a). When the layer (2) is irradiated with light having a predetermined wavelength, the luminescence from the fine phosphor particles is read as optical information. When irradiated with such light, the surface of the substrate (4a) has a reflectivity of at least 20 %. The data storage layer (2) has a thickness T of 0.5 to 20 mu m above the upper surface of the substrate (4a), and a protective sheet (6a) is laminated on the substrate (4a) to cover the data storage layer (2) as a whole. |
申请公布号 |
WO9322147(A1) |
申请公布日期 |
1993.11.11 |
申请号 |
WO1993JP00596 |
申请日期 |
1993.05.07 |
申请人 |
HITACHI MAXELL, LTD. |
发明人 |
OSHIMA, TOSHIO;OIWA, TSUNEMI;NISHIDA, MASATO;MATSUMOTO, TAIJI;ITO, AKIHIKO;TAKEUCHI, YOJI |
分类号 |
B42D15/10;G06K7/12;G06K19/06 |
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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