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2002年DVD的市场销售已达到 15亿张,人们还会提出关于DVD的标准、结构和格式方面的一些问题。为满足读者的要求,本文介绍DVD光盘/驱动器系统的一些物理基本原理。一、DVD的概述和主要参数 DVD光盘是由两片厚度为0.6mm基片组成,多层的数据存储可使容量达到17GB。只读DVD光盘家族有以下一些成员: 1.12cm的单面单层光盘,最大存储容量为4.7GB; 2.单面双层光盘,最大存储容量为8.5GB; 3.双面单层光盘,最大存储容量为9.4GB; 4.双面双层光盘,最大存储容量为17GB。
In 2002, the market for DVDs has reached 1.5 billion, and some questions about the standards, structure and format of DVDs will also be raised. To meet the reader’s requirements, this article describes some of the physical principles of DVD disc / drive systems. First, the DVD overview and the main parameters DVD disc is composed of two 0.6mm thick substrate, multi-layer data storage capacity can reach 17GB. Read-only DVD disc family has the following members: 1.12cm single-sided single-layer disc, the maximum storage capacity of 4.7GB; 2. Single-sided double-layer disc, the maximum storage capacity of 8.5GB; 3. Double-sided single- Storage capacity of 9.4GB; 4. double-sided double-layer disc, the maximum storage capacity of 17GB.