发明名称 |
Data carrier for optical read-out |
摘要 |
The present invention relates to data carriers intended for optical read out. The data carrier in accordance with the invention comprises: a first transparent material at the surface of which the information is recorded in the form of an embossed pattern; a partially transparent metal layer covers said embossed pattern and a second, thick transparent material is deposited upon the metal layer for protection purposes.
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申请公布号 |
US4020278(A) |
申请公布日期 |
1977.04.26 |
申请号 |
US19750623077 |
申请日期 |
1975.10.16 |
申请人 |
THOMSON-BRANDT |
发明人 |
CARRE, BERNARD;PUECH, CLAUDE;SPITZ, ERICH |
分类号 |
H04N5/85;B41M5/26;G06K19/06;G11B7/24;G11B7/254;G11B7/257;(IPC1-7):G11B7/24;H04N5/76 |
主分类号 |
H04N5/85 |
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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