【摘要】 根据高密度光盘参数 ,计算了聚焦光斑在光盘表面扫描过程中每个位置的光瞳光强分布 ,得到DPD(Differ entialPhaseDetection)循轨误差信号。考虑盘片的径向倾斜 ,在光瞳光强分布方程中引入盘片的径向倾斜角度参数 ,计算了高密度盘片产生径向倾斜时DPD循轨误差信号的变化 ,进而分析了盘片的径向倾斜引入的循轨伺服误差及其对循轨伺服的负面影响。结果表明 ,高密度盘片产生 0 .5°的径向倾斜相当于引入了 0 .0 12 μm的循轨误差更多还原

【Abstract】 The pupil energy distribution is calculated on each position when focus spot scanning through optical disk with parameters of digital versatile disk by using the scalar diffraction theory. In view of radial tilt, a radial tilt angle in pupil intensity function is considered then added, and consequently, a simulation of differential phase detecting tracking error is given when a radial tilt error occurs. Furthermore, the influence of radial tilt is analyzed when using differential phase detection tracking servo method.更多还原