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Proceedings Paper

Gap maintenance system using near-field optics and piezoelectric materials for near-field recording
Author(s): Hyuck-Dong Kwon; TaeSun Song; Wan-Jin Kim; No-Cheol Park; Young-Pil Park
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Paper Abstract

In this paper, our aim is to develop a system that can not only maintain stable gap distance under 100nm but also compensate the tilting between a pick-up head and disk surface for near-field recording (NFR), which is known as a key technology for a next generation optical storage. Applying total internal reflection (TIR) to the air gap measurement, we design an optical sensor to measure the gap distances at three points. Stack and bimorph piezoelectric actuators are utilized for high precision control with nanometer resolution. To understand dynamic characteristics of the system, an analytical method for boundary coupled beam model is performed and verified by comparison with the results of the finite element method (FEM).

Paper Details

Date Published: 18 October 2002
PDF: 10 pages
Proc. SPIE 4902, Optomechatronic Systems III, (18 October 2002); doi: 10.1117/12.467534
Show Author Affiliations
Hyuck-Dong Kwon, Yonsei Univ. (South Korea)
TaeSun Song, Yonsei Univ. (South Korea)
Wan-Jin Kim, Yonsei Univ. (South Korea)
No-Cheol Park, Yonsei Univ. (South Korea)
Young-Pil Park, Yonsei Univ. (South Korea)

Published in SPIE Proceedings Vol. 4902:
Optomechatronic Systems III
Toru Yoshizawa, Editor(s)

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