Transfer characteristics of rectangular phase gratings in interference microscopy.
Transfer characteristics of rectangular phase gratings in interference microscopy.
复制标题
干涉显微镜中矩形相位光栅的传输特性。
作者：
P. Lehmann;Weichang Xie;J. Niehues
本文研究了矩形周期相位物体的传输特性。事实证明，与振幅物体相比，存在显著差异。振幅对象的成像可以理解为一个线性过程，而相位对象的成像表现为非线性。结果表明，在一定条件下，只要一阶衍射分量通过光学成像系统，干涉显微镜就能得到正确形状的矩形相位光栅。该结果与实验观测和计算机模拟结果吻合较好。
In this Letter, the transfer characteristics of rectangular periodic phase objects are studied. It turns out that there are significant differences compared to amplitude objects. The imaging of an amplitude object can be understood as a linear process, whereas phase objects behave nonlinearly. It is shown that under certain conditions the correct shape of a rectangular phase grating can be obtained by an interference microscope as long as the first order diffraction component passes the optical imaging system. This result is in a good agreement with experimental observations and computer simulation results.