论文部分内容阅读
光盘存储,采用激光束记录和读出的方式,具有高存储密度、长使用寿命等优点,适于存储声像、文娱节目、文件、书籍、照片、数字数据等几乎一切信息。光盘存储技术的关键部分之一,就是记录介质——光盘。光盘由在基体(通常是玻璃、塑料等)上镀具有光效应的薄膜制成。记录信息时,由输入信号调制的激光束,聚焦成直径亚微米大小的光斑,在旋转的光盘上扫描,把信息以一连串“点”的形式沿螺线轨迹存储在记录介质膜层内。在这些“点”处,也即激光已照射处,
Disc storage, using laser beam recording and read out, with high storage density, long life, etc., suitable for storing audio and video, entertainment, documents, books, photos, digital data, and almost all information. One of the key parts of CD-ROM storage technology is the recording media - CD-ROMs. An optical disc is made of a film having a light effect on a substrate (usually glass, plastic, etc.). When recording information, the laser beam modulated by the input signal is focused into spots of sub-micrometer diameter and scanned on a rotating disk to store the information along a spiral track in a series of “dots” in the recording medium film. At these “points”, that is, the laser has been irradiated,