Holographic Optical Element with High Assembly Tolerance for the Optical Module of Digital Versatile Disc Pickup-Heads
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概要
- 論文の詳細を見る
The astigmatic focus detection method and differential phase detection (DPD) tracking method are now widely used in a digital versatile disk (DVD) pickup head. The DPD tracking method requires the returning spot to remain centered in a quad detector and therefore makes the optical alignment very critical. In this paper, a novel holographic optical element (HOE) pattern design to relax the alignment tolerance and achieve a stable DPD tracking servo property is described. Simulations show that the servo signals are insensitive to photo-detector (PD) misalignment when compared to that of a conventional HOE design.
- 社団法人応用物理学会の論文
- 1999-05-15
著者
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Yau H‐f
National Central Univ. Chung‐li Twn
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Yau Hon-fai
Institute Of Optical Sciences National Central University
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Yau Hon-fai
Institute Of Optical Science National Central University
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Freeman Mark
Opto-electronics & Systems Labs. Industrial Technology Research Institute
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Ju J‐j
Industrial Technol. Res. Inst. Hsinchu Twn
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Ju Jau-jiu
Opto-electronics & System Labs. Industrial Technology Research Institute
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SHIH Hsi-Fu
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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