公开(公告)号：US4956833A

公开(公告)日：1990-09-11

申请号：US456068

申请日：1989-12-26

申请人： Hiroshi Kokado ,  Suguru Takishima ,  Koichiro Nishikawa ,  Junichi Takeda ,  Masahiko Sasaki ,  Isao Okuda ,  Hiroshi Yamamoto ,  Masami Ninomiya ,  Akihiro Tanaka ,  Hiroshi Motohashi ,  Makoto Iwaki ,  Wataru Kubo

发明人： Hiroshi Kokado ,  Suguru Takishima ,  Koichiro Nishikawa ,  Junichi Takeda ,  Masahiko Sasaki ,  Isao Okuda ,  Hiroshi Yamamoto ,  Masami Ninomiya ,  Akihiro Tanaka ,  Hiroshi Motohashi ,  Makoto Iwaki ,  Wataru Kubo

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B33/08

CPC分类号： G11B7/12 ,  G11B33/08 ,  G11B7/093 ,  G11B7/094

摘要： An optical disk apparatus comprises an optical pickup having an optical pickup body carrying a laser and a photodetector responsive to light emitted from the laser and reflected by the optical disk for producing tracking error signals mounted on the optical pickup body for reciprocal movement in a tracking direction responsive to operation of an actuator, and supports an objective for focusing the beam on the disk. A position sensor produces position signals in response to displacement of the movable portion in the tracking direction. Finally a servo tracking circuit outputs driving signals to the actuator on the basis of tracking error signals produced either in response to tracking error signals produced from outputs of the photodetector and position signals produced from output signals of the position sensor, in response only to the latter. The optical disk apparatus having the foregoing construction eliminates direct-current offset included in tracking error signals, stabilizes driving of the objective, and reduces access time.

摘要翻译： 一种光盘装置，包括具有携带激光的光学拾取器的光学拾取器和响应于由激光器发出并由光盘反射的光的光电检测器，用于产生安装在光学拾取器主体上的跟踪误差信号，用于在跟踪方向上往复运动 响应于致动器的操作，并且支持将光束聚焦在盘上的目的。 位置传感器响应可动部分在跟踪方向上的位移而产生位置信号。 最后，伺服跟踪电路根据由响应于由光电检测器的输出产生的跟踪误差信号和由位置传感器的输出信号产生的位置信号而产生的跟踪误差信号，将驱动信号输出到致动器，仅响应于后者 。 具有上述结构的光盘装置消除了包括在跟踪误差信号中的直流偏移，稳定了目标的驱动，并减少了存取时间。