【作者】 刘全； 吴建宏；

【Author】 Liu Quan Wu Jianhong (Information Optics Engineering Institute, Suzhou University, Suzhou 215006)

【机构】 苏州大学信息光学工程研究所；

【摘要】 光栅的标量衍射理论是计算衍射效率的一种近似方法;耦合波理论是分析光栅衍射的严格方法。本文详尽地分析了这两种方法在计算具体的光栅衍射问题时的异同,从中得出了有意义的结论:光栅的标量衍射理论的近似是有条件的,光栅周期和光栅槽形就是影响这一近似条件的两大因素。更多还原

【Abstract】 The scalar diffraction theory to calculate the diffraction efficiency ofgrating is an approximation method; the coupled-wave theory is an accurate method.The two methods in solving the diffraction efficiency of grating are different. In thepaper, we present these differences in detail. Some useful conclusions are drawn:grating period and groove are important in approximation condition of scalardiffraction theory.更多还原