Recent improvements to optical disk drive technology

Duanyi Xu, Z. Cai, Haichuan Zhang
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Abstract

Several improvements to the optical disk drive and key parts have been carried out to enhance their function, storage density, capacity, data rate and reduce access time in recent years in the Optical Memory National Engineering Research Center (OMNERC). Approach for research on both of optical system and mechanic-electronic servo system are also reported in this paper. OMNERC of China started research and development on optical disk drive in the early 80's. In the past 15 years, many kinds of drives as phase-change erasable disk drive, CD-ROM drive, V-CD player etc. have been finished and some results of them have been playing important role in optical storage products manufacturing industry. In recent 5 years OMNERC has made the new optical drive model and some major technology research and development from the China national 8th five years science and technology development plan. The objective of this major subject is to make research and development on new generation multifunctional optical disk drive, especially on photo/thermo effect read, write and erase technology and drive as well as application systems. They are following projects: designing larger numerical aperture of objective lens used to enhance resolution and storage density, simplifying moving part of optical head to reduce its weight with holographic and other diffraction elements, increasing autofocusing and seeking precision, speed and proper frequency width of driving system, developing dual laser beams multifunctional optical head which is suitable for various inorganic and organic write once or erasable media, improving the data rate and reliability of storage data.
光盘驱动技术的最新改进
近年来,光存储国家工程研究中心(OMNERC)对光盘驱动器及其关键部件进行了多项改进,以提高其功能、存储密度、容量、数据速率和缩短访问时间。本文还介绍了光学系统和机电伺服系统的研究方法。中国OMNERC公司早在80年代初就开始了光盘驱动器的研究和开发。在过去的15年中,相变可擦磁盘驱动器、CD-ROM驱动器、V-CD播放机等多种驱动器相继问世,其中一些产品在光存储产品制造业中发挥了重要作用。近5年来,OMNERC完成了中国国家“八五”科技发展计划的新型光驱和一些重大技术的研发。本专业的目标是研究和开发新一代多功能光盘驱动器,特别是光/热效应读、写、擦除技术和驱动器及其应用系统。他们的项目如下:设计更大的物镜数值孔径以提高分辨率和存储密度,简化光学头的运动部分以减轻其重量,采用全息和其他衍射元件,提高自动对焦,寻求驱动系统的精度、速度和适当的频率宽度,开发适用于各种无机和有机一次写入或可擦除介质的双激光束多功能光学头。提高存储数据的速率和可靠性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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