论文部分内容阅读
光驱已经成为一部电脑中必不可少的配件,虽然它的使用寿命很短,但使用率的确很高,并且价格便宜,在短期内还不可能被替换掉。目前的光驱正朝三个方向发展: 读取方式的发展光驱读取方式的发展,经历了三个阶段:CLV、CAV、PCAV。最初的光驱采用“等线速度系统CLV系统”。这是传统的读盘方式,早期的光驱一般都采用该方式,现在仍被广泛使用。采用CLV系统的光驱,其读取资料的速度是恒定的,也就是说其光学读取头在单位时间内读过的轨道弧线长度是相等的,在读取光盘内圈资料时的转速比读取外圈资料时的转速大,转速是变化的,这就令光驱的效率下降。采用CLV系
Optical drive has become an essential part of a computer, although its service life is very short, but the usage is indeed high, and the price is cheap, it is impossible to be replaced in the short term. The current CD-ROM is developing in three directions: the development of reading The development of CD-ROM read, has gone through three stages: CLV, CAV, PCAV. The first optical drive using “linear velocity system CLV system.” This is the traditional way to read the disc, the early drive usually use this method, is still widely used. The use of CLV optical drive, the speed of reading data is constant, which means that the optical pickup read in unit time orbit arc length is equal to read the disc inner ring when the speed ratio When reading the outer ring data speed, speed is changing, which makes the drive efficiency decreases. Using CLV system