Dual Wavelength Optical Head for 0.6 mm and 1.2 mm Substrate Thicknesses

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概要

• 論文の詳細を見る

• A dual wavelength optical head for 0.6 mm and 1.2 mm substrate thicknesses, containing 635 nm and 785 nm laser diodes, has been developed. Holographic optical element (HOE) type optics and variable magnification type optics are described. For both types of optics, high light power efficiency is obtained, which is suitable for random access memory (RAM) applications. Moreover, the use of 785 nm light makes it possible to read compact disc-recordable (CD-R). A readout operation for a quadruple density CD and a conventional CD has been successfully demonstrated.

• INSTITUTE OF PURE AND APPLIED PHYSICSの論文
• 1997-01-30

著者

• ONO Yuzo

  Optical Recording Technology Development Center, NEC Corporation

• Katayama Ryuichi

  Optical Recording Technology Development Center Nec Corporation

• Komatsu Yuichi

  Optical Recording Technology Development Center Nec Corporation

• Ono Yuzo

  Optical Recording Technology Development Center, NEC Corporation, 1-1, Miyazaki 4-chome,

関連論文

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• Dual Wavelength Optical Head for 0.6 mm and 1.2 mm Substrate Thicknesses

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