| 发明名称 |
DISCRIMINATION MEDIUM, DISCRIMINATION METHOD, AND DISCRIMINATION DEVICE |
| 摘要 |
An object of the present invention is to provide a discrimination medium which has high discrimination ability, and which is more difficult to counterfeit than conventional discrimination mediums. A discrimination medium 100 comprises: a cholesteric liquid crystal layer 102; and a liquid crystal layer 103 acting as a half-wave plate and provided on the cholesteric liquid crystal layer 102 in a predetermined pattern. |
| 申请公布号 |
EP2006750(B1) |
申请公布日期 |
2014.08.20 |
| 申请号 |
EP20070740729 |
申请日期 |
2007.03.30 |
| 申请人 |
NHK SPRING CO., LTD.;NIPPON OIL CORPORATION |
发明人 |
HOSHINO, HIDEKAZU;TAKEUCHI, ITSUO;NISHIMURA, SUZUSHI;SUZAKI, GOROU |
| 分类号 |
G03H1/18;B42D15/00;G02B5/30;G03H1/00;G03H1/02;G07D7/12;G07D7/20 |
主分类号 |
G03H1/18 |
| 代理机构 |
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代理人 |
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