发明名称 |
Disk discrimination method and device |
摘要 |
An optical disk apparatus comprises objective lenses (34,35) for converging on first or second type optical disks an optical beam corresponding to different numerical apertures. For discriminating a disk (10) the objective lens (34) having the greater numerical aperture is moved along its optical axis to search the disk, and the type of the disk is discriminated from the waveform of the signal detected during search. <IMAGE> |
申请公布号 |
EP1211676(B1) |
申请公布日期 |
2004.01.07 |
申请号 |
EP20020002479 |
申请日期 |
1997.10.29 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
TSUCHIYA, SHIGEO;SHIMIZU, TATSURO;NAKANE, HIROSHI |
分类号 |
G11B7/00;G11B7/004;G11B7/085;G11B7/09;G11B7/135;G11B19/12;(IPC1-7):G11B7/09;G11B19/02;G11B7/125 |
主分类号 |
G11B7/00 |
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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