Dual-Layer-Compatible Optical Head: Integration with a Liquid-Crystal Panel
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概要
- 論文の詳細を見る
A liquid-crystal (LC) panel was integrated into a two-axis electromagnetic actuator in order to realize a dual-layer-compatible optical head for “Blu-ray Disc” systems. This head configuration can actively compensate the cover layer difference of up to nearly 40 μm thickness. Our novel driving method of mixing the controlling signals into four metal wire suspensions can maintain the dynamic performance of the optical head and has achieved a servo bandwidth beyond 5 kHz both in the focusing and in the tracking directions. We also confirmed its optical performance by recording and reproducing 17PP signals on a dual-layer phase-change disc and verified a 46.6 GB storage capacity. In addition, our optical head has interlayer accessibility within 20 ms and satisfies the requirement for a dual-layer disc system. By using this integrated optical head instead of a beam expander, a compact optical pickup for a dual-layer storage system can be realized.
- 2003-02-15
著者
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Nakao Takashi
Optical Disc Development Division Av/it Development Group Sony Corporation
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YAMAMOTO Kenji
Optical Disc Development Division, AV-IT Development Group. Sony Corporation
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OSATO Kiyoshi
Optical Disc Development Division, AV-IT Development Group. Sony Corporation
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Ichimura Isao
Optical Disc Development Division Av-it Development Group. Sony Corporation
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TANAKA Tomomichi
Optical Disc Development Division, AV/IT Development Group, Sony Corporation
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Tanase Hironobu
Optical Disc Development Division Av/it Development Group Sony Corporation
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Hashimoto Gakuji
Optical Disc Development Division Av/it Development Group Sony Corporation
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Hashimoto Gakuji
Optical Disc Development Division, AV/IT Development Group, Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
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Kurokawa Kotaro
Optical Disc Development Division, AV/IT Development Group, Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
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Nakao Takashi
Optical Disc Development Division, AV/IT Development Group, Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
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Tanaka Tomomichi
Optical Disc Development Division, AV/IT Development Group, Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
関連論文
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- Near-Field Phase-Change Optical Recording of 1.36 Numerical Aperture
- Optical Disk Recording Using a GaN Blue-Violet Laser Diode
- High Density Magneto-Optical Recording with a Second-Harmonic Generation Green Laser
- Dual-Layer-Compatible Optical Head : Integration with a Liquid-Crystal Panel
- High-Resolution Blue-Laser Mastering Using and Inorganic Photoresist
- 0.8-Numerical-Aperture Two-Element Objective Lens for the Optical Disk
- Dual-Layer-Compatible Optical Head: Integration with a Liquid-Crystal Panel
- High-Resolution Blue-Laser Mastering Using an Inorganic Photoresist
- Optical Recording Using High Numerical-Aperture Microlens by Plasma Etching
- Dual-Layer-Compatible Optical Head: Integration with a Liquid-Crystal Panel