It is shown that there exist spectralswitches when the observation position is at the right points.
研究表明：在衍射场的某些观测点，即在调制函数为零的位置附近，存在光谱开关现象。
2
The phenomenon of scattering-induced spectralswitches of polychromatic Gaussian beams in the far zone belongs to the effect in singular optics.
散射诱导的多色高斯光束远场光谱开关属于“奇点光学”效应。
3
Detailed numerical results are given to illustrate the behavior of spectral shifts and spectralswitches in Young's experiment and a comparison with previous work is also made.