The principle of the detection of the focusing error signal in a holographic optic head is dis - cussed.

讨论了全息光学头聚焦误差信号检测的基本原理。

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According to the principle of focusing error for two dimensions laser galvanometer scanning, a dynamic focusing optical model for correcting this error was put forward.

针对二维振镜存在的聚焦误差问题，根据产生聚焦误差的原理，采用动态聚焦技术补偿聚焦误差。

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Eventually these companies realize their error of not focusing enough on the new thing, and then the company fights desperately and hopelessly to recover.

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But focusing on the deficit is a disastrous error.

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