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就在几年前,光盘刻录机还是件奢侈品,刻录过程也非常繁琐。而CD-R盘片只能一次性写入,一旦刻坏,后悔莫及(相信很多人都有过刻盘失败的经历)。所以光盘刻录曾让不少用户望而却步。 近来,CD-RW刻录机开始走入我们的视野,RW是ReWritable的简称,就是说可以“重写”。与CD-R不同,CD-RW可以多次重复写入,其主要原因是两种盘的材质不同,CD-R上有一层光敏感有机涂层,该涂层对光的反射性可以在高能激光束的照射下改变,也就是能被“写入”,但这种“改变”是不可变的,因此只能一次性地写入。而CD-RW的可擦写层是种聚合晶体,在激光的加热下可在晶体和非晶体状态间变化,而晶体和非成体状态下对光线的反射性
Just a few years ago, CD burner is still a luxury, burning process is also very cumbersome. The CD-R disc can only write once, once engraved, regretful (I believe many people have had the experience of disc failure). So many users discouraged CD burning. Recently, CD-RW recorders began to come into our field of vision. RW is short for ReWritable, meaning “rewriteable.” Unlike CD-Rs, CD-RWs can be rewritten many times, mainly due to the different materials of the two discs. The CD-R has a layer of light-sensitive organic coating that reflects the light at high energy Laser beam irradiation changes, that is, can be “written”, but this “change” is immutable, it can only be written once. The rewritable layer of CD-RW is a kind of polycrystalline crystal, which can change between crystal and non-crystal state under the heating of laser, while the reflectivity to light in crystal and non-state