Optical disk player having reduced laser output during track changes
    4.
    发明授权
    Optical disk player having reduced laser output during track changes 失效
    光盘播放器在轨道更改期间减少了激光输出

    公开(公告)号:US4660189A

    公开(公告)日:1987-04-21

    申请号:US714870

    申请日:1985-03-22

    CPC classification number: G11B7/126 G11B7/004 G11B7/005

    Abstract: This invention relates to an optical disk recording and reproducing apparatus for recording a predetermined signal on and/or reproducing the same from a writable disk which is rotated at a constant linear velocity by using a laser from a laser source. In this case, upon reproducing the above-described signal, if a signal recorded on the inner periphery of the disk is accessed, during the period from this addressing up to the time when the linear velocity at the inner periphery of the disk becomes constant, on the basis of a spindle lock signal, the beam power of the laser from the laser source and irradiating the disk is decreased to thereby prevent useless data from being rewritten on the disk.

    Abstract translation: 本发明涉及一种光盘记录和再现装置,用于通过使用来自激光源的激光从以可变速度旋转的可写盘记录预定信号和/或再现该光盘。 在这种情况下,在再现上述信号时,如果记录在盘的内周上的信号被访问,则在从该寻址到盘的内周的线速度变为恒定的时间期间, 基于主轴锁定信号,来自激光源的激光束的光束功率减小,从而防止在盘上重写无用的数据。

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