发明授权
- 专利标题： Information recording and retrieval method, and its apparatus
- 专利标题（中）： 信息记录和检索方法及其装置
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申请号： US11780058申请日： 2007-07-19
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公开(公告)号： US07821884B2公开(公告)日： 2010-10-26
- 发明人: Takeshi Maeda , Takeshi Shimano , Akemi Hirotsune , Harukazu Miyamoto
- 申请人： Takeshi Maeda , Takeshi Shimano , Akemi Hirotsune , Harukazu Miyamoto
- 申请人地址： JP Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Antonelli, Terry, Stout & Kraus, LLP.
- 优先权： JP2007-058024 20070308
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
Provided is a recording and retrieval apparatus for a multi-layer optical disk. A multi-layer optical disk in which a plurality of recording layers and a single servo layer are combined to form a set is used. A spot for the servo layer and a spot for the recording layers are turned on in a time-sharing manner. Servo signal detection areas are formed discretely in the servo layer. The servo signal detection areas and data recording areas are provided so as not to overlap each other when viewed from the spot incident side. Thus, separation of data from each of the layers can be done by even a single photodetector without interference.
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