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Optical disk recording and/or reproduction device follows modulated track on optical disk adjacent to special track from which reflected beam is detected
Optical disk recording and/or reproduction device follows modulated track on optical disk adjacent to special track from which reflected beam is detected
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机译:光盘记录和/或再现设备遵循光盘上与已检测到反射光束的特殊磁道相邻的调制磁道
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摘要
The device has a fist group of tracks containing a modulated track (WG) and a non-modulated track (NWG), each in the form of a trench or plateau. Modulated tracks have both sides meander-shaped and non-modulated tracks have no meander-shaped sides. A second group of tracks between the tracks of the first group are used to record information. If the first track is a trench the second is a plateau and vice-versa. A source directs a beam onto a special track. A beam reflected from the track is detected by a reflected beam detector and a controller controls the source to follow a modulated track adjacent to the special track. Independent claims are also included for an arrangement optical disk recording and/or reproduction method and for a track following method.
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