三角形二维周期结构光栅的衍射场  

Diffraction Fields of Triangular Two-dimensional Periodic Structured Gratings

作　　者：刘有菊[1] 杨庆辞[1] 何正英 LIU Youju;YANG Qingci;HE Zengying(Baoshan University,Baoshan Yunnan 678000,China)

机构地区：[1]保山学院,云南保山678000

出　　处：《保山学院学报》2021年第5期26-29,共4页JOURNAL OF BAOSHAN UNIVERSITY

摘　　要：通过实验得出三角形二维周期结构光栅的夫琅禾费衍射图样;根据基尔霍夫衍射积分公式及相移-位移定理推导出三角形二维周期结构光栅在像面上的波前函数、振幅分布函数及光强分布函数;利用计算机数值模拟出三角形二维周期结构光栅在像面上振幅分布和光强分布的图样;分析衍射图样得出三角形二维周期结构光栅衍射的特征;结果表明:光的衍射具有提取、携带衍射屏信息的能力,可为研究全同单元组成的凝聚态物质结构时提供一种新的研究方法。In order to investigate the diffraction field of the triangular two-dimensional periodic structured grating.Firstly,the Fronhofer diffraction graphs of the triangular 2D periodic grating are derived by experiments;then the wave-front function,amplitude distribution function and optical intensity distribution function of the triangular 2D periodic grating on the image plane are derived according to the Kirchhoff diffraction integral formula and the phase-shift-displacement theorem;The amplitude distribution and light intensity distribution of the triangular 2D structured grating on the image plane are simulated by computer.Finally,the diffraction patterns are analyzed to derive the characteristics of the diffraction from the triangular two-dimensional periodic structure grating.It can provide a new research method studying condensed matter structure of same unit composition.

关 键 词：衍射 基尔霍夫衍射积分公式 相移-位移定理 三角形二维周期结构光栅 

分 类 号：O4[理学—物理]