计算结果表明：旋转误差使三光束法循迹信号的幅值近似呈周期性变化，它是在生产过程中需要严格控制的参数以保证循迹信号的幅值最大化；

The rotation angle approximately periodically changes the sub-beam signal amplitude and should be strictly controlled in the assembly to maximize the tracking signal amplitude.

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不作旋转波近似， 破缺可积性的因素，主要来自虚光场项。

In NRWA, the main factor which will deslroy the non classical effects is the virtual photon term.

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