| 发明名称 |
INK FOR INVISIBLE INFORMATION RECORDING, PRINTED MATTER HAVING INVISIBLE INFORMATION RECORDING PART, AND METHOD OF ITS READING |
| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an invisible information printed matter of high security utilizing negative non-linear effect of a trivalent erbium ion. SOLUTION: An invisible information recording part containing trivalent erbium ions is formed by printing, and existence of the invisible information is judged by detecting the reflected light emitted by reversing a sinusoidal wave-modulated incident light.</p> |
| 申请公布号 |
JP2002179964(A) |
申请公布日期 |
2002.06.26 |
| 申请号 |
JP20000381748 |
申请日期 |
2000.12.15 |
| 申请人 |
HITACHI MAXELL LTD |
发明人 |
YAMADA YUKINORI |
| 分类号 |
B42D15/10;B41J2/01;B41J29/00;B41M3/14;C09D11/00;(IPC1-7):C09D11/00 |
主分类号 |
B42D15/10 |
| 代理机构 |
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