问题是研制一种廉价的盘式数字信息记录器。它能在写入后直接读出,并且可以在普通室内,而不是在通常要求防尘的绝对清洁室内记录。 通过激光记录的光盘是解决上述问题的一种办法。这种光盘有它自己的内部“清洁室”。一个光盘所能记录的数字数据与用25盘磁带以6250位/英寸的密度记录的数据一样 The problem is to develop a cheap disc digital information recorder. It can be read directly after writing and can be recorded in a normal room rather than in an absolute clean room where dust is normally required. Discs recorded by laser are a solution to the above problems. This disc has its own internal “clean room.” The digital data that one disc can record is the same as that recorded with 25 tapes at a density of 6250 bits per inch