公开(公告)号：EP1039454A1

公开(公告)日：2000-09-27

申请号：EP99400675.7

申请日：1999-03-19

申请人： DEUTSCHE THOMSON-BRANDT GMBH

发明人： Kaaden, Jürgen, Thomson Multimedia Licensing & IP ,  Mahr, Peter, Thomson Multimedia Licensing & IP ,  Oldermann, Klaus Thomson Multimedia Licensing & IP ,  Uhde, Dietmar, Thomson Multimedia Licens. & IP

IPC分类号： G11B7/09

CPC分类号： G11B7/0935 ,  G11B7/0932 ,  G11B7/0933

摘要： An optical pick up as used for example in an optical disk player comprises a lens holder, a body (15) of which may support a lens (8). The body is moved in an externally applied magnetic field using a coil (20) rigidly fixed to the body. The movement occurs when a current flows in the coil. The body comprises a cavity (18) delimited by a cavity wall (19). The coil is fitted inside the cavity such that a whole circumference of the coil is in contact with the cavity wall. The coil body assembly shows an improved stiffness which allows to move the lens holder at relatively high frequencies.

摘要翻译： 如在用于实施例上的光盘播放机的光学拾取器包括一个透镜架，主体（15）的哪一个可支持一透镜（8）。 所述主体被移动到使用线圈（20）刚性地固定到所述主体外部施加的磁场。 发生移动而当电流在线圈中流动。 所述主体包括由腔壁（19）限定的空腔（18）。 内部空腔搜索做了线圈的整周与所述腔壁相接触的线圈被装配。 线圈主体组件示出了改进的刚度，其允许在相对高的频率使透镜夹持器。