高斯光束圆孔衍射特性  

The Characteristics of the Diffraction Field of Gaussian Beam by a Circular Aperture

作　　者：李汝烯[1] 白凤翔[2] 李汝恒[1] 张学清[1] 环敏[1] 

机构地区：[1]大理学院物理与电子信息学院,云南大理671003 [2]云南师范大学现代教育技术中心,云南昆明650092

出　　处：《云南师范大学学报（自然科学版）》2008年第2期40-44,共5页Journal of Yunnan Normal University:Natural Sciences Edition

摘　　要：把圆孔光阑窗口函数展开为有限复高斯函数和,用Collins积分公式导出了高斯光束圆孔衍射光场分布的近似解析表达式。经计算机数值计算,分析了轴上光强和不同衍射区观察面上的光强分布,研究了轴上任意点的光强随圆孔半径变化的关系。指出轴上存在"衍射焦点"。Based on Collins integral formula and the expansion of the hard aperture function into a finite sum of complex Gaussian functions, the approximate analytical expression of the diffraction field of Gaussian beam by a circular aperture is derived, the intensity distribution on the axis and the different diffractive regions are analyzed by the numerical calculation and numerical simulation o The relation between the intensity on the axis and the radius of the aperture is studied. There is diffractive focus on axis

关 键 词：Collins积分 高斯光束 圆孔衍射 

分 类 号：O436.1[机械工程—光学工程]