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1. 发明申请

WO2006072534A1 OPTICAL SCANNING APPARATUS FOR APPLIANCES FOR RECORDING OR REPRODUCING INFORMATION USING AN OPTICAL RECORDING MEDIUM 审中-公开
标题翻译：用于使用光学记录介质记录或重现信息的设备的光学扫描装置
公开(公告)号：WO2006072534A1
公开(公告)日：2006-07-13
申请号：PCT/EP2005/056711
申请日：2005-12-13
申请人： THOMSON LICENSING , BARTELS, Uwe , BAMMERT, Michael , BAUSCH, Ralf , SUZUKI, Tsuneo , FU, Chien, Chung , ASCHENBRENNER, Frank
发明人： BARTELS, Uwe , BAMMERT, Michael , BAUSCH, Ralf , SUZUKI, Tsuneo , FU, Chien, Chung , ASCHENBRENNER, Frank
IPC分类号： G11B7/09
CPC分类号： G11B7/0935 , G11B7/0932 , G11B7/0933 , G11B7/0956
摘要： The invention provides an optical scanning apparatus for appliances for recording or reproducing information using an optical recording medium, said scanning apparatus automatically matching itself to the curvature of a curved recording medium or of a recording medium with axial runout without there being different wire diameters for the resilient support of the lens holder (LH) or other additional damping means or an additional control loop for this purpose. This object is achieved by virtue of an arrangement comprising coils and magnets being provided which has an asymmetrical magnetic field distribution which is provided for matching the orientation of a lens (L) in the optical scanning device to a curved recording medium or to any axial runout in the recording medium. The asymmetrical magnetic field distribution is achieved with magnets arranged offset laterally or with magnets (MS) which are bevelled on one side or with a focusing coil which is asymmetrically shaped or is arranged asymmetrically with respect to the magnets. The individual embodiments for achieving an asymmetrical magnetic field distribution can be combined with one another.
摘要翻译：本发明提供了一种用于使用光学记录介质记录或再现信息的设备的光学扫描装置，所述扫描装置自动地将其自身匹配曲率记录介质或具有轴向跳动的记录介质的曲率，而不存在不同的线径透镜架（LH）或其他附加阻尼装置的弹性支撑件或用于此目的的附加控制回路。该目的是通过提供一种包括线圈和磁体的装置来实现的，该布置具有非对称磁场分布，其被设置用于将光学扫描装置中的透镜（L）的取向与弯曲记录介质或任何轴向跳动在记录介质中。非对称磁场分布是通过横向偏移排列的磁体或者在一侧倾斜的磁体（MS）或不对称成形的或相对于磁体非对称布置的聚焦线圈来实现的。用于实现非对称磁场分布的各个实施例可以彼此组合。

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