发明名称 |
Device for scanning an optical record carrier |
摘要 |
<p>An optical scanning device scans a surface (23) provided with marks with a focused radiation beam (35) along a scan line. The device has a radiation-sensitive detection system (39) comprises a plurality of detectors. An electronic circuit (41) determines the time differences between corresponding parts of the detector signals relating to passage of the radiation beam over one of the marks. The time differences are used to form a signal representing a primary wavefront aberration of the radiation beam.
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申请公布号 |
EP0965981(A3) |
申请公布日期 |
2009.11.25 |
申请号 |
EP19990201868 |
申请日期 |
1999.06.11 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
BRAAT, JOSEPHUS JOHANNES MARIA |
分类号 |
G11B7/09;G11B7/00;G11B7/013;G11B7/13 |
主分类号 |
G11B7/09 |
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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