It shows signal harmonics is obviously weakened by the smoothing action in the setting process and there is a best conversion frequency to minimize harmonic distortion.
发现了建立过程的平滑作用可以明显地削弱信号的谐波分量，并存在一个最佳转换频率，使谐波失真达到最小值。
The study on the beam smoothing and the focusing properties of the broadband harmonic field can provide valuable reference to the experiment.
对宽带倍频光的光束匀滑及聚焦特性的研究，可为实现靶面均匀辐照提供参考。
应用推荐