Eccentricity Compensation Mechanism for Improving Reliability of Removable Performance in Near-Field Optical Disc Drive System
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概要
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In this paper, we propose the eccentricity-compensating actuator mechanism for near-field (NF) optical disc drives. In this proposed dual-stage compensating actuator mechanism, the disc-spindle unit is actuated instead of the solid immersion lens (SIL) along the tracking axis to cancel out an eccentricity less than 20 μmpp (pp: peak to peak), which is the required criterion for NF discs of 160 nm track pitch. As a result, the proposed method enables the decrease in the required residual tracking error to lower than the criteria of 4.5 nm in NF optical disc drive (ODD) even when using the tracking servo of moderate performance. The proposed active eccentricity compensation method can be effective and applicable to dealing with the eccentricity problem in NF ODD, which we verified experimentally.
- 2008-07-25
著者
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Ishimoto Tsutomu
Optical Disc Development Division Av/it Development Group Sony Corporation
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Nakaoki Ariyoshi
Optical Disc Development Division Av/it Development Group Sony Corporation
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Kim Sunmin
Optical Media Laboratory, Material Laboratories, SONY Corporation, 4-14-1 Asahi-cho, Atsugi, Kanagawa 243-0014, Japan
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Kawakubo Osamu
Optical Media Laboratory, Material Laboratories, SONY Corporation, 4-14-1 Asahi-cho, Atsugi, Kanagawa 243-0014, Japan
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Ishimoto Tsutomu
Optical Media Laboratory, Material Laboratories, Sony Corporation, 4-14-1 Asashi-cho, Atsugi, Kanagawa 243-0014, Japan
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