Optical Module Using Double-Sided Polarizaing Diffractive Optical Element for Digital Versatile Disc Drives

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概要

• 論文の詳細を見る

• Digital versatile discs (DVDs) promise to provide excellent multimedia strage for both entertainment and computer use. In this paper, we report a newly designed optical module for use in DVD systems. It consists of a laser diode chip, a phtodiode chip, a compound prism, and a double-sided polarizing diffractive optical element (DOE). The double-sided polarizing DOE provides high total light power efficiency (here 78%) that a DVD system requires because of its very small operational margin. The developed optical module has dimensions 9.5 mm(W)×4.2 mm(D)× 6.7 mm(H) and weighs 0.55 g. Its practicality has been demonstrated in successful DVD readout operations, and it is expected to provide the same compact, inexpensive drive that optical modules provide in compact disc (CD) systems.

• 社団法人応用物理学会の論文
• 1998-06-30

著者

• Nagano Tsuyoshi

  Optical Recording Technology Development Center Nec Corporation

• Yamanaka Yutaka

  Optical Recording Technology Development Center Nec Corporation

• SHIRAKAWA Hidekazu

  Optical Recording Technology Development Center, NEC Corporation

• KATAYAMA Ryuichi

  Optical Recording Technology Development Center, NEC Corporation

• Katayama Ryuichi

  Optical Recording Technology Development Center Nec Corporation

• Shirakawa Hidekazu

  Optical Recording Technology Development Center Nec Corporation

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