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1. 发明授权

US06930850B2 Head clamping apparatus for magnetic disk tester and magnetic disk tester 失效
标题翻译：磁盘测试仪和磁盘测试仪头夹紧装置
公开(公告)号：US06930850B2
公开(公告)日：2005-08-16
申请号：US09987007
申请日：2001-11-13
申请人： Hitoshi Takagi , Kiyotaka Fukuoka , Mamoru Hatano , Katsuhiro Fujii
发明人： Hitoshi Takagi , Kiyotaka Fukuoka , Mamoru Hatano , Katsuhiro Fujii
IPC分类号： G11B5/596
CPC分类号： G11B5/59627 , G11B5/455 , G11B5/483 , G11B5/59611
摘要： A magnetic disk tester has a head clamp (35, 218) to position a magnetic head (15, 289). The head clamp has a micromotion stage (55, 273) provided with a stage (59, 205) which is horizontally moved by a piezo-element (77). The magnetic head is attached to the piezo-stage (55, 273). On the head clamp (218), a reflective scale (222) is attached to a back face of the piezo-stage, and a laser head (217) is oriented toward the head clamp (218). According to a reflected laser beam from the reflective scale, the position of the magnetic head (289) is detected. An error signal indicating the difference between the detected position and a reference position is used to control the head clamp (218). The piezo-element can operate at high frequencies, to easily make the magnetic head trace a target track and improve the positioning accuracy of the magnetic head.
摘要翻译：磁盘测试器具有用于定位磁头（15,289）的磁头夹（35,218）。所述头夹具具有微动平台（55,273），其具有由压电元件（77）水平移动的台（59,205）。磁头连接到压电级（55,273）。在头夹（218）上，反射刻度（222）附接到压电级的背面，并且激光头（217）朝向头夹（218）定向。根据来自反射刻度尺的反射激光束，检测磁头（289）的位置。使用指示检测位置和参考位置之间的差异的误差信号来控制头夹（218）。压电元件可以在高频下工作，容易使磁头跟踪目标轨迹并提高磁头的定位精度。

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