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.
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
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