发明申请
- 专利标题： Information recording medium and information recording device
- 专利标题（中）： 信息记录介质和信息记录装置
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申请号： US10542853申请日： 2003-12-25
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公开(公告)号： US20060120232A1公开(公告)日： 2006-06-08
- 发明人: Naoharu Yanagawa , Tatsuhiro Yone , Masahiro Kato , Akira Shirota , Kunihiko Horikawa , Eiji Muramatsu
- 申请人： Naoharu Yanagawa , Tatsuhiro Yone , Masahiro Kato , Akira Shirota , Kunihiko Horikawa , Eiji Muramatsu
- 优先权： JP2003-13615 20030122
- 国际申请： PCT/JP03/16811 WO 20031225
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
A tracking servo control device for making a tracking servo control to apply a light beam onto a groove track on a recording medium where the groove track and a pre-pit are preformed, is provided with: a first generation device which generates a first regenerative signal based on a reflected light from the recording medium when at least a part of the pre-pit is formed within a radiation range of the light beam onto the groove track; a second generation device which generates a second regenerative signal based on a reflected light from the recording medium when the pre-pit is formed outside the radiation range of the light beam; and a calculation device which calculates an offset value in the tracking servo control based on the first regenerative signal and the second regenerative signal that are generated.
信息查询
IPC分类:
