光盘结构及实验中的光学现象

Structure of compact disk and optical phenomena in the experiment

用胶带将CD-R的数据记录层和树脂层分离,分别用扫描电子显微镜和光学实验方法研究了光盘数据记录层的结构,测量了光盘径向的光道间距,计算出光盘的容量.实验中观察到了衍射亮点,其成因是光在金属印刷层与树脂层之间的多次反射和衍射.

The data storage layer of CD-R was separated from the PC layer using tapes. The structure of the data storage layer was researched using SEM and optical approach. The distance of two optical tracks was measured, and the capacity of CD was calculated. The diffraction lightspots were observed, and the reason was that more than once reflection and diffraction took place between metal printing layer and PC layer.