大家知道,各种影碟、唱碟,无论CD、LD,还是VCD碟片和光碟上面均布满了信息数据,这些信息数据通过机器的激光束读取出来而形成音像信号。碟片镜面的污染、划伤和错误的清洁方法会造成激光束散射,使机器不能正常读取信息。因此,在使用过程中,大家总是异常小心地保护好碟片镜面,认为信息码存在于碟的镜面,碟片背 We all know that a variety of discs, disc, regardless of CD, LD, or VCD discs and discs are covered with information data, the information data through the machine’s laser beam read out to form the audio and video signals. Disc mirror contamination, scratches and incorrect cleaning methods can cause laser beam scattering, so that the machine can not read the information normally. Therefore, in the course of using, we are always very careful to protect the disc mirror, that information code exists in the disc mirror, disc back