| 发明名称 |
VORRICHTUNG ZUM LESEN EINES AUFZEICHNUNGSTRAEGERS MIT EINER OPTISCH LESBAREN, SPURFOERMIG ANGEORDNETEN DATENSTRUKTUR |
| 摘要 |
<p>An apparatus is described for reading an optical information structure arranged in tracks. By the use of a substantially rotationally symmetrical element having an annular radiation-attenuating peripheral portion cross-talk between the tracks as a result of obliquity of the information structure is substantially reduced.</p> |
| 申请公布号 |
ATA399582(A) |
申请公布日期 |
1983.10.15 |
| 申请号 |
AT19820003995 |
申请日期 |
1982.11.02 |
| 申请人 |
N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
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| 分类号 |
G11B7/1381;G11B7/1392;(IPC1-7):G11B7/08 |
主分类号 |
G11B7/1381 |
| 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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