发明名称 |
Optical disk having pits of different depths formed therein, optical disk reproducing apparatus for reproducing the optical disk, and method of tracking the optical disk |
摘要 |
On an optical disk, a string of a plurality of pits having two different depths is formed. Quantity of light reflected from the pit string is detected by a photoreceptor element, and based on the detected quantity of reflected light, a pit depth detecting unit detects depth of each pit. Based on the detected quantity of reflected light, a servo signal generating unit generates a tracking servo signal. An output control unit supplies the generated tracking servo signal when a pit of such depth that is to be reproduced is tracked, and holds and supplies an immediately preceding tracking servo signal when a pit of different depth is being tracked, based on the result of detection by the pit depth detecting unit.
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申请公布号 |
US2001036134(A1) |
申请公布日期 |
2001.11.01 |
申请号 |
US20010800082 |
申请日期 |
2001.03.05 |
申请人 |
NAKAJIMA JUNSAKU;TAKEUCHI HITOSHI;NOMURA MASARU;OHTA KENJI |
发明人 |
NAKAJIMA JUNSAKU;TAKEUCHI HITOSHI;NOMURA MASARU;OHTA KENJI |
分类号 |
G11B7/08;G11B7/013;G11B7/09;(IPC1-7):G11B7/095 |
主分类号 |
G11B7/08 |
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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