標題: An optical lever approach to photodetector measurements of the pickup-head flying height in an optical disk drive
作者: Hsiao, C. C.
Peng, C. Y.
Liu, T. S.
機械工程學系
Department of Mechanical Engineering
關鍵字: optical lever;photodetector;pickup-head;disk drive
公開日期: 1-八月-2006
摘要: In order to increase the storage capacity and the density of near-field optical disk drives, a flying pickup-head has to allow a slider to fly at a stable height above the disk surface with the use of near-field optics. Since both the precision of the track pitch and the flying height are of a nanometre scale, it is necessary to increase the motion accuracy of the pickup- head. In this study, a piezoelectric bender is used as an actuator of the pickup- head, and two quadrant photodetectors are used to sense the pickup- head displacement and the rotating disk deformation. Based on an optical lever method that magnifies a small displacement, the flying height variation of the pickup- head above the disk is measured. Further results show that using the proposed measurement method in the real-time control of flying height is feasible.
URI: http://dx.doi.org/10.1088/0957-0233/17/8/040
http://hdl.handle.net/11536/11974
ISSN: 0957-0233
DOI: 10.1088/0957-0233/17/8/040
期刊: MEASUREMENT SCIENCE & TECHNOLOGY
Volume: 17
Issue: 8
起始頁: 2335
結束頁: 2342
顯示於類別:期刊論文


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  1. 000239774300042.pdf