衍射光栅位相拼接的计算分析

Analysis and computing for the phase matching of diffraction gratings

从光学远场衍射的原理出发 ,研究了两块具有完全相同参数的衍射光栅间相互拼接时不同的位相与谱线强度变化的特性关系 ,建立了相应的数学模型 ,并利用计算机进行了模拟计算。计算的结果表明 :拼接出的光栅比其中单一一块光栅在增加了光强的同时也提高了分辨率 ,为通过采用拼接方法来获取大面积光栅提供了理论依据。

The focusing properties relationship of the phase shift and the beam intensity was studied while two gratings were matched according to the Far Field Diffraction principle.The mathmatical model was set up and the performance was computed.The result show that both the intensity and the resolution were increased obviously.