夫琅禾费光栅衍射的MATLAB仿真及分析  

Simulation and Analysis of Fraunhofer Grating Diffraction by Using MATLAB

作　　者：曾建华[1] 彭亦平 赖徽媛 桑志文[1] 常山[1] ZENG Jianhua;PENG Yiping;LAI Huiyuan;SANG Zhiwen;CHANG Shan(School of Physics and Electronic Information,Shangrao Normal University,Shangrao Jiangxi 334001,China;School of Foreign Languages,Shangrao Normal University,Shangrao Jiangxi 334001,China)

机构地区：[1]上饶师范学院物理与电子信息学院,江西上饶334001 [2]上饶师范学院外国语学院,江西上饶334001

出　　处：《上饶师范学院学报》2019年第3期26-30,共5页Journal of Shangrao Normal University

基　　金：江西省教育厅科技项目(GJJ170923);江西省上饶市科技局工业科技项目(17A005);上饶师范学院博士科研启动基金(6000108)

摘　　要：运用MATLAB仿真计算得到了夫琅禾费光栅衍射的光强分布曲线和衍射图样。通过改变缝数N、缝宽b、光栅常数d、透镜焦距f、光波波长λ,研究了光强分布曲线和衍射图样随这些参数的变化规律。在光栅常数d和缝宽b的比值为整数的条件下,探究了光栅衍射中的缺级现象。计算机技术应用到光栅衍射的探究中,这有利于教师的教学和学生对知识点的理解与掌握。The curve of light-intensity distribution and the diffraction pattern of Fraunhofer grating diffraction were obtained by the simulation based on MATLAB.By changing the number N and width b of slits,the grating constant d ,the focal length f of the lens and the wavelength λ of the light wave,the variation of Fraunhofer grating diffraction with these parameters was studied.At the condition that the ratio of the grating constant d to the slit width b is an integer,the phenomenon of missing grades in the grating diffraction was investigated.The computer technology is applied to the exploration of grating diffraction,which is beneficial to the teaching of the teachers and the understanding and mastery of the students on the grating diffraction.

关 键 词：夫琅禾费光栅衍射 MATLAB 光强分布曲线 衍射图样 缺级 

分 类 号：O437[机械工程—光学工程]