讨论了全息光学头聚焦误差信号检测的基本原理。
The principle of the detection of the focusing error signal in a holographic optic head is dis - cussed.
光斑尺寸法是数字光盘信息存储中的典型聚焦误差探测方法。
Spot size detection method is representative method to obtain a focus error digital optical disk storage system.
分别以动态聚焦模块校正聚焦误差，以网格插值算法软件校正“枕形”畸变。
The focussing error is corrected by means of dynamic focussing module and the "pillow shaped" distortion is corrected with the software of the grid interpolating algorithm.
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