发明授权
- 专利标题： Method of detecting light spot control signal
- 专利标题（中）： 光点控制信号检测方法
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申请号： US401020申请日： 1982-07-22
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公开(公告)号： US4563760A公开(公告)日： 1986-01-07
- 发明人: Takeshi Maeda , Kazuo Shigematsu , Masahiro Takasago , Yasumitsu Mizoguchi , Zenji Tsutsumi , Yoshito Tsunoda , Motoo Uno
- 申请人： Takeshi Maeda , Kazuo Shigematsu , Masahiro Takasago , Yasumitsu Mizoguchi , Zenji Tsutsumi , Yoshito Tsunoda , Motoo Uno
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX56-138583 19810904
- 主分类号： G02B7/28
- IPC分类号： G02B7/28 ; G11B7/08 ; G11B7/09 ; G11B7/00
摘要：
A method of detecting a light spot control signal is disclosed in which, when information is reproduced from an optical disk for optically recording information, a signal level obtained at a high-reflectivity portion of the optical disk is taken out of a signal reproduced from the optical disk, and is used as a control signal, which controls a light spot so that it tracks information stored in the optical disk.
公开/授权文献
- US4970784A Razor with a pivoted detachable blade unit 公开/授权日：1990-11-20
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