A Novel Pickup Head Design for DVD-Multi System
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概要
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This paper introduces a novel holographic optical element (HOE) pattern design to generate focusing and tracking signal for using in digital versatile disc DVD-multi pickup heads. The digital verstile disk (DVD) multi drive will be able to read disks written in the DVD-ROM, DVD-video, DVD-audio, DVD-R/W, and DVD-R formats. DVD multi drive will also be able to write disks in the DVD-RAM and DVD-RW/R formats. The HOE design provides the focusing error signal and both differential phase detection (DPD) and pushpull tracking signals for DVD-ROM disks and rewritable land-groove disks. The HOE pattern is divided into two main regions. The inner region is for focus detection and the outer region is for DPD and Pushpull tracking detection. In this study, a rotary actuator is used to reduce the tilt angle of the objective lens in the DVD-multi pickup head. The finite element method of the actuator is studied to analyze the resonance of the structure and the magnetic field of the voice coil motor.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
著者
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Yang Tzu-ping
Opto-electronics & Systems Laboratories Industrial Technology Research Institute
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Huang Der-ray
Opto-electronics & Systems Lab. Itri
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Wei Li-ding
Opto-electronics & Systems Laboratories Industrial Technology Research Institute
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Ju Jau-jiu
Opto-electronics & System Labs. Industrial Technology Research Institute
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CHANG Chi-Lone
Opto-Electronics & Systems Laboratories, Industrial Technology Research Institute
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SHIH Hsi-Fu
Opto-Electronics & Systems Laboratories, Industrial Technology Research Institute
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Chang Chi-Lone
Opto-Electronics & Systems Laboratories, Industrial Technology Research Institute, Hsin-Chu 310, Taiwan, R.O.C.
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Wei Li-Ding
Opto-Electronics & Systems Laboratories, Industrial Technology Research Institute, Hsin-Chu 310, Taiwan, R.O.C.
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Huang Der-Ray
Opto-Electronics & Systems Laboratories, Industrial Technology Research Institute, Hsin-Chu 310, Taiwan, R.O.C.
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Shih Hsi-Fu
Opto-Electronics & Systems Laboratories, Industrial Technology Research Institute, Hsin-Chu 310, Taiwan, R.O.C.
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Yang Tzu-Ping
Opto-Electronics & Systems Laboratories, Industrial Technology Research Institute, Hsin-Chu 310, Taiwan, R.O.C.
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