在数字光盘存储中,为实现光盘的高密度(5×10~5位/毫米~2)信息读/写,往往采用光盘的预刻槽母盘制作工艺和电铸、注塑成型复制技术,提高光盘制作精度,而不是提高光盘驱动器的机械精度。也就是光盘在录刻信息前预先制成宽0.6微米、深0.07微米、节距为1.67微米的连续螺旋沟槽。这样在录刻信息时只要用径向伺服机构保证读/写光斑落在槽内或槽 In digital disc storage, in order to realize high density (5 × 10 ~ 5 bits / millimeter ~ 2) read / write information of the optical disc, pre-engraved disc mastering process of optical disc and electroforming and injection molding replication technology are often used to improve Rather than improving the optical disc drive’s mechanical precision. That is, the optical disk is pre-made into a continuous spiral groove of 0.6 μm in width, 0.07 μm in depth and 1.67 μm in pitch prior to recording the information. This record information as long as the use of radial servo to ensure reading / writing light spot falls in the groove or groove