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) base 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. <IMAGE> |
申请公布号 |
EP0611666(A4) |
申请公布日期 |
1995.04.26 |
申请号 |
EP19930911973 |
申请日期 |
1993.05.07 |
申请人 |
HITACHI MAXELL |
发明人 |
OSHIMA TOSHIO;OHIWA TSUNEMI;NISHIDA MASATO;MATSUMOTO TAIJI;ITOH 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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