发明名称 |
DISK DISCRIMINATION METHOD AND OPTICAL DISK DEVICE |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method which determines successfully the number of information layers of a multilayer disk and an optical disk device using it. <P>SOLUTION: A process for distinguishing the number of layers of a disk is carried out by setting at least two kinds of spherical aberration compensation amounts and performing focus search. <P>COPYRIGHT: (C)2007,JPO&INPIT |
申请公布号 |
JP2006344268(A) |
申请公布日期 |
2006.12.21 |
申请号 |
JP20050167668 |
申请日期 |
2005.06.08 |
申请人 |
HITACHI LTD;HITACHI-LG DATA STORAGE INC |
发明人 |
YASUKAWA TAKAKIYO |
分类号 |
G11B7/085;G11B7/004;G11B7/125;G11B7/135 |
主分类号 |
G11B7/085 |
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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