Two types of two dimensional lateral shearing interferometers have been studied: orthogonal shearing prism and crossed grating.
本文研究了两种类型的二维横向剪切干涉仪：正交剪切棱镜型和网格光栅型。
An approximate equivalent coefficient for two-dimensional sub wavelength was obtained with the related expressions of grating structure.
构造了一种分析方法，然后利用光栅结构的有关表达式得到这种二维结构的近似等效系数。
An approximate equivalent coefficient for two-dimensional sub wavelength was obtained with the related expressions of grating structure.
构造了一种分析方法，然后利用光栅结构的有关表达式得到这种二维结构的近似等效系数。
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