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    • 98. 发明授权
    • Optical data recording/reproducing apparatus and optical data storage
medium for use in the same
    • 光数据记录/再现装置和用于其的光学数据存储介质
    • US5650987A
    • 1997-07-22
    • US371958
    • 1995-01-12
    • Shin-ichi Kadowaki
    • Shin-ichi Kadowaki
    • G11B5/012G11B5/596G11B7/007G11B7/09G11B11/105
    • G11B7/0901G11B11/10576G11B5/012G11B5/596G11B7/00745G11B7/0938G11B7/094G11B7/0941G11B7/0904G11B7/0908G11B7/0909
    • Disclosed is an optical data apparatus for recording and regenerating data on an optical disc, optical card, or the like. There are particularly disclosed an optical data apparatus and an optical data storage medium appropriate for the apparatus capable of detecting a tracking error signal effective particularly for an optical data storage medium on which optical data are recorded at a high density. A pattern is formed on a track and in a position displaced from the track by half cycle of the track in a first servo pattern area, and no pattern is formed in a second servo pattern area. The first servo pattern area and the second servo pattern area are arranged adjacent to each other. The tracking error signal is obtained through multiplication of differential signals obtained at the timing of Sa1 and Sa2. The tracking error signal can be detected up to a spatial cutoff frequency twice as high as the frequency in the conventional case by means of a conventional optical system.
    • 公开了一种用于在光盘,光卡等上记录和再生数据的光学数据装置。 特别公开了一种光学数据装置和光学数据存储介质,该光学数据装置和光学数据存储介质适用于能够检测特定于以高密度记录光学数据的光学数据存储介质有效的跟踪误差信号的装置。 在第一伺服图案区域中,在轨道上和轨道上以轨迹半周形成位置的图案,并且在第二伺服图案区域中不形成图案。 第一伺服图案区域和第二伺服图案区域彼此相邻布置。 通过在Sa1和Sa2的定时获得的差分信号的乘法获得跟踪误差信号。 跟踪误差信号可以通过传统的光学系统被检测到高达常规情况下的频率的两倍的空间截止频率。
    • 99. 发明授权
    • Servo pattern in an optical data storage medium for obtaining a tracking
error signal
    • 用于获得跟踪误差信号的光学数据存储介质中的伺服模式
    • US5406545A
    • 1995-04-11
    • US100457
    • 1993-07-30
    • Shin-ichi Kadowaki
    • Shin-ichi Kadowaki
    • G11B5/012G11B5/596G11B7/007G11B7/09G11B11/105G11B7/00
    • G11B7/0901G11B11/10576G11B5/012G11B5/596G11B7/00745G11B7/0938G11B7/094G11B7/0941G11B7/0904G11B7/0908G11B7/0909
    • Disclosed is an optical data apparatus for recording and regenerating data on an optical disc, optical card, or the like. There are particularly disclosed an optical data apparatus and an optical data storage medium appropriate for the apparatus capable of detecting a tracking error signal effective particularly for an optical data storage medium on which optical data are recorded at a high density. A pattern is formed on a track and in a position displaced from the track by half cycle of the track in a first servo pattern area, and no pattern is formed in a second servo pattern area. The first servo pattern area and the second servo pattern area are arranged adjacent to each other. The tracking error signal is obtained through multiplication of differential signals obtained at the timing of Sa1 and Sa2. The tracking error signal can be detected up to a spatial cutoff frequency twice as high as the frequency in the conventional case by means of a conventional optical system.
    • 公开了一种用于在光盘,光卡等上记录和再生数据的光学数据装置。 特别公开了一种光学数据装置和光学数据存储介质,该光学数据装置和光学数据存储介质适用于能够检测特别对于以高密度记录光学数据的光学数据存储介质有效的跟踪误差信号的装置。 在第一伺服图案区域中,在轨道上和轨道上以轨迹半周形成位置的图案,并且在第二伺服图案区域中不形成图案。 第一伺服图案区域和第二伺服图案区域彼此相邻布置。 通过在Sa1和Sa2的定时获得的差分信号的乘法获得跟踪误差信号。 跟踪误差信号可以通过传统的光学系统被检测到高达常规情况下的频率的两倍的空间截止频率。