发明申请
US20090072818A1 Position sensor, optical head device, head moving mechanism, information recordng/reproducing device and position control system
有权
位置传感器，光头装置，头移动机构，信息记录/再现装置和位置控制系统
- 专利标题： Position sensor, optical head device, head moving mechanism, information recordng/reproducing device and position control system
- 专利标题（中）： 位置传感器，光头装置，头移动机构，信息记录/再现装置和位置控制系统
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申请号： US11918613申请日： 2006-04-18
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公开(公告)号： US20090072818A1公开(公告)日： 2009-03-19
- 发明人: Osamu Mizuno , Hiroshi Yamamoto , Takuya Wada , Hideki Aikoh , Kanji Wakabayashi , Takatoshi Yukimasa
- 申请人： Osamu Mizuno , Hiroshi Yamamoto , Takuya Wada , Hideki Aikoh , Kanji Wakabayashi , Takatoshi Yukimasa
- 优先权： JP2005-120568 20050419
- 国际申请： PCT/JP2006/308147 WO 20060418
- 主分类号： G01B7/14
- IPC分类号： G01B7/14
摘要：
As imaging devices are miniaturized, and optical devices are miniaturized, lens moving mechanisms are also miniaturized. Thus, position sensors for them are required to be miniaturized and have high accuracy at low cost. A magnet 2 of a pillar shape and a yoke 3 which move in X axis direction with respect to a magnetic field detection element 1 are provided, and a shape of a cross section of the yoke 3 which is orthogonal to a longitudinal direction of the magnet 2 changes along the longitudinal direction.
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