发明名称 |
Protected optical disc |
摘要 |
This disc has a layer of an inscribable and optically legible recording material deposited on a transparent plate traversed by the recording or reading beam and protected from the outside by a cover formed for example by a metal sheet, whose two surfaces are fixed to the layer so as to form a space in front of the latter.
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申请公布号 |
US4308545(A) |
申请公布日期 |
1981.12.29 |
申请号 |
US19790078728 |
申请日期 |
1979.09.25 |
申请人 |
THOMSON-CSF |
发明人 |
LEHUREAU, JEAN-CLAUDE;MAGNA, HENRIETTE;THIROUARD, MICHEL |
分类号 |
G11B7/24;(IPC1-7):G01D15/34 |
主分类号 |
G11B7/24 |
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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