Optical Head with Two Wavelengths in Single Path Using Holographic Optical Element

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概要

• 論文の詳細を見る

• In this paper, we review a number of digital versatile disk (DVD) pickup designs and present a new structure with two wavelengths using a 780 nm integrated optical unit (IOU) and a 650 nm laser diode (LD) in a single optical path. The 780 nm IOU acts as a sensor for the 650 nm system. Two returned beams of different wavelengths are diffracted by a holographic optical element (HOE) to the same detector. With this construction, the number of components is reduced and alignment is effectively simplified.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2005-04-15

著者

• Shih Hsi-fu

  Department Of Mechanical Engineering National Chunghsing University

• Shih Hsi-Fu

  Department of Mechanical Engineering, National ChungHsing University, 250, Kuo-Kuang Rd., Taichung 402, Taiwan, R.O.C.

• Shih Hsi-Fu

  Department of Mechanical Engineering and Center of Nanoscience and Nanotechnology, National ChungHsing University, 250, Kuo-Kuang Rd., Taichung 402, Taiwan, R.O.C.

関連論文

• Optical Head with Two Wavelengths in Single Path Using Holographic Optical Element
• Multiple-Beam Liquid Crystal Grating for the Recordable Optical Pickup Head
• Polarization-Selective Liquid-Crystal Device and Its Application to Recordable Integrated Optical Unit

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