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    • 2. 发明授权
    • Optical focus position control in optical disc apparatus
    • 光盘装置中的光焦点位置控制
    • US4660190A
    • 1987-04-21
    • US529849
    • 1983-09-06
    • Yoshikazu FujiiToshihisa DeguchiTetsuya InuiHideyoshi Yamaoka
    • Yoshikazu FujiiToshihisa DeguchiTetsuya InuiHideyoshi Yamaoka
    • G11B7/09G11B11/105G11B7/00
    • G11B11/10576G11B11/10504G11B7/09G11B7/093G11B7/0932
    • Disclosed below is a control device for positioning an optical focus in an optical disc apparatus that records, plays back, and erases any information by irradiating optical beams such as the laser beams onto a recording media composed of magnetic film, wherein the control device is characterized in that; it incorporates a focussing permanent magnet that makes up a closed magnetic circuit, a focussing yoke plate, a focussing yoke, and a focussing device coil installed so that it crosses a focussing magnetic space existing that exists between the focussing yoke plate and the focussing yoke so that the focussing magnetic space can be created in an area close to the recording media which is installed in the closed magnetic circuit. In addition, the optical focus position control device that executes both the tracking and focussing control operations for the optical disc apparatus also includes mechanism that drives the objective lens in the direction of dual axes, i.e., in the vertical (up/down) and horizontal (left/right) directions.
    • 以下公开了一种用于将光学焦点定位在光盘装置中的控制装置,其通过将诸如激光束的光束照射到由磁性膜构成的记录介质上来记录,重放和擦除任何信息,其中控制装置的特征在于 在那里面; 它结合了一个聚焦永久磁铁,它构成一个封闭的磁路,一个聚焦磁轭板,一个聚焦磁轭和一个聚焦装置线圈,它被安装成使得它穿过存在于聚焦磁轭板和聚焦磁轭之间的聚焦磁空间, 可以在靠近安装在闭合磁路中的记录介质的区域中产生聚焦磁空间。 此外,执行光盘装置的跟踪和聚焦控制操作的光焦点位置控制装置还包括在双轴方向上驱动物镜的机构,即垂直(上/下)和水平 (左/右)方向。