发明公开
EP1039454A1 Lens holder with a coil in a cavity thereof for use in an actuator
审中-公开
与在线圈可用于致动器的腔体透镜支架
- 专利标题： Lens holder with a coil in a cavity thereof for use in an actuator
- 专利标题（中）： 与在线圈可用于致动器的腔体透镜支架
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申请号： EP99400675.7申请日： 1999-03-19
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公开(公告)号： EP1039454A1公开(公告)日： 2000-09-27
- 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
- 申请人： DEUTSCHE THOMSON-BRANDT GMBH
- 申请人地址： Hermann-Schwer-Strasse 3 78048 Villingen-Schwenningen DE
- 专利权人： DEUTSCHE THOMSON-BRANDT GMBH
- 当前专利权人： DEUTSCHE THOMSON-BRANDT GMBH
- 当前专利权人地址： Hermann-Schwer-Strasse 3 78048 Villingen-Schwenningen DE
- 代理机构： Zhang, Jianguo
- 主分类号： G11B7/09
- IPC分类号： G11B7/09
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.
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