公开(公告)号：US06826133B2

公开(公告)日：2004-11-30

申请号：US09330894

申请日：1999-06-11

申请人： Isao Ichimura ,  Tatsuya Narahara ,  Kiyoshi Osato

发明人： Isao Ichimura ,  Tatsuya Narahara ,  Kiyoshi Osato

IPC分类号： G11B785

CPC分类号： G11B7/1374 ,  G11B7/08511 ,  G11B7/0945 ,  G11B7/13925 ,  G11B2007/13727

摘要： Disclosed are an optical information recording/reproducing apparatus and an optical information recording/reproducing method for simultaneously optimizing a distance between lenses constituting a two-objective lens and an offset in focus control. The apparatus includes a first electromagnetic actuator and a second electromagnetic actuator for cyclically moving a first lens and a second lens in the direction of the optical axis thereof; and a position control circuit for performing, upon focusing operation, the positional adjustment of the first lens and the second lens after start-up of focus control, on the basis of reproducing signals obtained from an optical disk at both ends of the cyclic movement of the first and second lenses by the first and second electromagnetic actuators.

摘要翻译： 公开了一种用于同时优化构成双目镜的透镜与聚焦控制偏移之间的距离的光信息记录/再现装置和光信息记录/再现方法。 该装置包括第一电磁致动器和第二电磁致动器，用于在第一透镜和第二透镜的光轴方向上循环移动第一透镜和第二透镜; 以及位置控制电路，用于在聚焦操作时，根据从循环运动两端的光盘获得的再现信号，进行聚焦控制启动之后的第一透镜和第二透镜的位置调整 第一和第二透镜由第一和第二电磁致动器。