众所周知.光碟是激光唱机(CD),激光影碟(LD)及激光音影碟(CDV)的总称,可算是高科技产品,它以其高保真的图像和音响受到消费者青睐。其所用的碟片原版正宗产品价格较贵,而盗版劣质品价格便宜,且进入市场的渠道繁杂,但确吸引着不少购买者。用过这些碟片的人一般认为:碟片图声质量比不过原版,但可以凑合着用。只要对影碟机没妨碍,贪个便宜,何乐而不为呢?理由是,收录机,录像机的磁带和磁头是机械接触,使用质量差的磁带易损坏磁头、磁鼓,而碟片和激光头是非机械接触,影碟是由激光束来扫描碟面,激光拾取器件与碟片之间无机械接触,故不会磨损碟片。这理由初听似乎有道理,但却不然。价廉劣质碟片往往粗制滥造,不但质量差、寿命短,还会损坏激光唱机和影碟机中最昂贵的器件、——激光头及聚焦线圈和光电接收管等元器件。1.碟片表面有划痕和断裂时,有时肉眼不易察觉 As we all know, CDs are the general term for CD players, laser discs (LDs) and CDVs, which are high-tech products that are favored by consumers for their high-fidelity images and sound. The discs used in their original authentic products are more expensive, while pirated inferior products are cheap, and the channels entering the market are complex, but it does attract a lot of buyers. People who have used these discs generally believe that: the sound quality of disc images than the original, but you can make do with. The reason is that tape recorders, VCR tapes and heads are mechanical contact, the use of poor quality tape is easy to damage the head, drum, and the disc and the laser head Non-mechanical contact, the DVD is scanned by the laser beam disk, the laser pickup device with no mechanical contact between the disc, it will not wear disc. This reason seems to make sense, but not. Poor quality discs are often shoddy, not only poor quality, short life expectancy, but also the most expensive devices in laser disc players and DVD players - the laser head and focusing coils and photocells and other components. 1. When the surface of the disc is scratched and broken, sometimes the naked eye is not easily noticeable