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    • 8. 发明授权
    • Disk recording and reproducing apparatus
    • 磁盘记录和再现装置
    • US06324134B1
    • 2001-11-27
    • US09368116
    • 1999-08-04
    • Yoshinobu OhtachiHirotaka NamikiAkira ShimadaYutaka SegawaIkuo Muto
    • Yoshinobu OhtachiHirotaka NamikiAkira ShimadaYutaka SegawaIkuo Muto
    • G11B700
    • G11B7/095G11B19/2009
    • Conventional disk recording and reproducing apparatuses have addressed a shortcoming that they cannot correct squareness errors and misalignments caused by the warpage of a disk and the eccentricity of the center hole of the disk and of the center of curvature of signal tracks. To overcome this shortcoming, a disk recording and reproducing apparatus of the present invention comprises: magnetic bearing means capable of supporting a rotary body and adjusting a relative position of the rotary body; a pickup for irradiating, with a laser beam, a recording surface of a disk mounted on a table arranged on the rotary body and receiving the laser beam reflected by the recording surface; detection means for calculating a relative positional relationship between the disk and a focal position of the laser beam based on a signal from the pickup; and control means for adjusting the position of the rotary body by controlling the magnetic bearing means.
    • 传统的磁盘记录和再现装置已经解决了一个缺点:它们不能校正由于盘的翘曲和盘的中心孔的偏心度以及信号轨道的曲率中心引起的矩形误差和不对准。 为了克服这个缺点,本发明的磁盘记录和再现装置包括:能够支撑旋转体并调节旋转体的相对位置的磁性轴承装置; 拾取器,用激光束照射安装在设置在旋转体上的台上的盘的记录表面,并接收由记录表面反射的激光束; 检测装置,用于基于来自拾取器的信号计算所述盘和所述激光束的焦点位置之间的相对位置关系; 以及控制装置,用于通过控制磁性轴承装置来调节旋转体的位置。