平面波照明两方向周期不同的正交位相光栅的泰伯效应

Talbot Effect of Orthogonal Phase Grating With d_x≠d_y,Iliuminated by Plane Wave

本文对平面波照明两方向周期不同的正文位相光栅的衍射传播进行了研究，发现当相对位相分布较一个弧度小得多时，正交位相光栅的复振幅分布也具有泰伯效应，且其成象条件和振幅型正交光栅相同。

In this paper,discussion is held on the diffraction propogation of orthogonal phase grat-ing with d_x≠d_y,illuminated by plane wave,It is found that when the relative phase distribution is much smaller than one radian,the complex amplitude distribution of orthogonal phasegrating has Talbot effect,too.Its existence condition is the same as that of the amplitude or thogonal grating.