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1.前言目前,信息处理技术又面临着大变革时期,高密度大容量光存储技术是支持这种变革的重要技术之一。现举文字处理为例,过去是作为编码信息输入而进行处理的,现在已有可能将文字当作图象进行数字化处理。这样,信号容量便呈若干数量级地增大。作为这种高密度大容量光存储技术的一种,现在,光盘记忆出现了。它是用激光照射高速旋转的园盘。在园盘的存储薄膜里进行比特(二进制信息)记录,再用同样的激光进行读出。
1. Preface At present, the information processing technology is facing a period of great change. High-density, large-capacity optical storage technology is one of the important technologies supporting this change. Take the example of word processing. In the past, it was processed as input of coded information. It is now possible to digitize the text as an image. In this way, the signal capacity increases by several orders of magnitude. As a high-density, large-capacity optical storage technology, CD-ROM memory is now available. It is a high-speed rotation of the disk with a laser irradiation. Bit (binary information) is recorded in the storage film of the disk and then read by the same laser.