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Optical disk having predetermined cross-track signal, cross-track minimum signal, and push-pull signal
Optical disk having predetermined cross-track signal, cross-track minimum signal, and push-pull signal
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机译:具有预定交叉轨迹信号,最小交叉轨迹信号和推挽信号的光盘
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摘要
A high density optical disk having data tracks and pre-grooves disposed in a track pitch not higher than 1.2 &mgr;m provides groove signals to a disk drive having a two-divided optical detector for tracking control. The groove signal characteristics of the optical disk is such that an envelope cross-track signal, an envelope cross-track minimum signal and an envelope push-pull signal are not less than 0.10, not less than 0.12 and between 0.10 and 0.70, respectively, when normalized by a virtual mirror surface. The optical disk may be any of a magneto-optical (MO) disk, a ROM disk and a partial ROM disk and can provide any type of disk drives with sufficient groove signals for tracking control in both a magneto-optical area and a ROM area.
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