发散球面波 meaning in English

divergent spherical wave

Here , the spatial distribution of fresnel diffraction field and different talbot effects of sinusoidal grating are presented , under three different illuminating conditions . especially , we discussed some interesting properties about fresnel diffraction field and talbot image , when sinusoidal grating is illuminated by divergent spherical wave
特别地，我们讨论了发散球面波照明的情况下，菲涅耳衍射光场和泰伯像所具有的一些有趣的性质，如球面波对光场的放大作用，泰伯效应存在的条件等等。