任意亮度孔形衍射的数值模拟
收稿日期: 2021-03-19
修回日期: 2021-05-08
网络出版日期: 2021-12-14
基金资助
国家自然科学基金青年基金( 11904007)
Numerical simulation of aperture diffraction with arbitrary brightness
Received date: 2021-03-19
Revised date: 2021-05-08
Online published: 2021-12-14
循环计算光屏上复振幅分布，可简单快速地实现任意形状及亮度孔的近场和远场衍射图案的数值模拟，给出任意形状和任意亮度孔的衍射图案.模拟近场衍射特性时，衍射图像中央存在光强减弱、增强两种情况，验证了近场衍射到远场衍射的过程中央光强变化逐渐减少; 模拟正多边形孔衍射特性时，验证了当正多边形的边数趋于无穷大时，衍射图像为圆孔衍射; 最后，给出任意形状和任意亮度孔的衍射图案.
方慧雯, 杨锦宏, 贺胜男, 卫玉娇, 张吴记, 汪卫华 . 任意亮度孔形衍射的数值模拟[J]. 大学物理, 2021 , 40(12) : 24 . DOI: 10.16854 / j.cnki.1000-0712.210128
programming. The brightness values of various aperture light sources are realized by using
picture pixels，and the complex amplitude distribution on the light screen is calculated by
Matlab cycle. The numerical simulation of near-field / far-field dif- fraction pattern of
arbitrary shape and brightness aperture can be realized simply and quickly，and the
diffraction pattern of arbitrary shape and brightness aperture are given. In the process of
near-field diffraction to far-field dif- fraction，the change of central light intensity
gradually decreases ( from Fresnel diffraction to Fraunhofer diffrac- tion) ; in the
process of simulating the diffraction characteristics of regular polygon hole，it is verified that
when the number of regular polygon edges tends to infinity，the diffraction image is
circular hole diffraction; finally，a nu- merical example is given for diffraction pattern of
arbitrary shape and brightness hole.
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