公开(公告)号：US4562562A

公开(公告)日：1985-12-31

申请号：US478443

申请日：1983-03-24

申请人： Mitsuro Moriya ,  Toshiji Kanamaru ,  Yoshinobu Nakata

发明人： Mitsuro Moriya ,  Toshiji Kanamaru ,  Yoshinobu Nakata

IPC分类号： G11B7/085 ,  G11B21/08 ,  G11B7/00 ,  G11B21/10

CPC分类号： G11B21/085 ,  G11B21/083 ,  G11B7/08517 ,  G11B7/08529 ,  G11B7/08541

摘要： A data track searching device capable of switching between two modes; one being the rough searching mode in which a transducer is displaced at a high velocity to a desired track and the other being the fine searching mode which follows the rough searching mode and in which the transducer is displaced at a relative low velocity and positioned over the proper or desired track. The operating point of a tracking element is shifted or deviated as a result of the high-velocity displacement of the transducer in the rough searching mode so that stable searching cannot be ensured. According to the present invention, therefore, the acceleration of the transducer in the rough searching mode is detected and a signal representative of the thus detected acceleration is applied to the tracking element so that the shift or deviation of the operating point of the tracking element can substantially made nil.

摘要翻译： 一种能够在两种模式之间切换的数据轨迹搜索装置; 一个是粗略搜索模式，其中换能器以高速度移动到期望的轨道，另一个是跟随粗略搜索模式的精细搜索模式，并且其中换能器以相对低的速度移位并且位于 正确或期望的轨道。 跟踪元件的工作点由于在粗略搜索模式下换能器的高速位移而偏移或偏移，从而不能确保稳定的搜索。 因此，根据本发明，检测粗略搜索模式中的换能器的加速度，并且将表示由此检测到的加速度的信号应用于跟踪元件，使得跟踪元件的工作点的偏移或偏移可以 大致为零

公开(公告)号：US4807206A

公开(公告)日：1989-02-21

申请号：US2069

申请日：1987-01-12

申请人： Mitsuro Moriya ,  Toshiji Kanamaru ,  Kazuharu Shiragami ,  Hiroyuki Yamaguchi ,  Katsuya Watanabe

发明人： Mitsuro Moriya ,  Toshiji Kanamaru ,  Kazuharu Shiragami ,  Hiroyuki Yamaguchi ,  Katsuya Watanabe

IPC分类号： G11B7/09 ,  G11B7/00

CPC分类号： G11B7/0946 ,  G11B7/0901 ,  G11B7/0948 ,  Y10S358/907

摘要： A system for recording or reproducing a signal by focusing and irradiating a light beam on a record carrier from a light source while controlling the light beam to always scan the track on the record carrier is disclosed. A track jump that may occur during recording or reproducing a signal on the record carrier is accurately detected. The reliability of the system is thus improved in such a way as to take appropriate action in case of a track jump.

摘要翻译： 公开了一种通过在控制光束始终扫描记录载体上的轨道的同时聚焦和照射来自光源的记录载体上的光束来记录或再现信号的系统。 准确地检测在记录或再现记录载体上的信号时可能发生的轨迹跳跃。 因此，系统的可靠性得到改善，以便在轨道跳跃的情况下采取适当的动作。