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    • 52. 发明授权
    • Laser power control method and optical information recording/reproducing device
    • 激光功率控制方法和光信息记录/再现装置
    • US08107334B2
    • 2012-01-31
    • US12097201
    • 2006-12-11
    • Atsushi Miyazaki
    • Atsushi Miyazaki
    • G11B20/10G11B7/00G11B5/09
    • G11B7/0062G11B7/00718G11B7/00745G11B7/1263G11B7/1267
    • Control powers of a first definition group corresponding to pulse trains to form recording marks, and levels of second definition groups corresponding to the control powers of the first definition group for respective states on a recording medium are set. The laser is driven with drive values corresponding to the control powers selected from the first definition group in the selected level of the second definition group, and emission power detection values are detected. The detection values are stored for respective levels of the second definition groups, and an occurrence of obtaining the detection value is counted for each level of the second definition groups. When any of counter values exceeds a predetermined value, using the detection values stored for one level of the second definition groups corresponding to the counter value, corrected drive values are determined collectively for all the levels of the second definition groups.
    • 设置对应于脉冲串形成记录标记的第一定义组的控制功率,以及对应于记录介质上各状态的第一定义组的控制功率的第二定义组的电平。 利用与从第二定义组的选定电平中的第一定义组中选择的控制功率对应的驱动值驱动激光器,并且检测发射功率检测值。 对于第二定义组的各个级别存储检测值,并且针对第二定义组的每个级别对获得检测值的发生进行计数。 当计数器值中的任一个超过预定值时,使用与计数器值对应的第二定义组的一个级别存储的检测值,针对第二定义组的所有级别集中确定校正的驱动值。
    • 58. 发明授权
    • Optical disk recording/reproduction apparatus with a detection means for detecting dirt on the optical disk
    • 具有用于检测光盘上的污物的检测装置的光盘记录/再现装置
    • US07023777B2
    • 2006-04-04
    • US10169985
    • 2001-01-04
    • Atsushi MiyazakiChikashi InokuchiHiroyuki Yamaguchi
    • Atsushi MiyazakiChikashi InokuchiHiroyuki Yamaguchi
    • G11B7/00
    • G11B20/18G11B7/00375G11B19/04G11B20/10G11B20/12
    • An optical disc recording/reproducing apparatus includes: recording/reproducing means for recording/reproducing information by emitting a light beam onto a disc having a track which wobbles at a predetermined frequency; reflected light detection means for detecting the light beam reflected from the disc; wobble signal detection means for detecting a wobble amplitude signal which represents an amplitude of a signal generated from a component which is extracted from an output of the reflected light detection means and which wobbles at the predetermined frequency; and variation rate detection means for detecting dirt adhered on the disc based on a rate of a variation in the wobble amplitude signal, wherein the variation rate detection means detects the dirt based on the wobble amplitude signal before the recording/reproducing means records/reproduces the information.
    • 一种光盘记录/再现装置,包括:记录/再现装置,用于通过将光束发射到具有以预定频率摆动的轨道的盘上来记录/再现信息; 用于检测从盘反射的光束的反射光检测装置; 摆动信号检测装置,用于检测摆动幅度信号,该摆动幅度信号表示从反射光检测装置的输出提取的分量产生的信号的幅度,并以预定频率摆动; 以及变化率检测装置,用于基于摆动振幅信号的变化率来检测附着在盘上的污垢,其中变化率检测装置在记录/再现装置记录/再现之前基于摆动振幅信号检测污物 信息。