摘要
通过Matlab编程研究透射光栅狭缝数对衍射光强分布的影响,结果发现:主极大的宽度随狭缝数N的增大而减小,其强度随狭缝数N的增大而增大;当N越大,次极大明纹的线宽越小,其光强越弱;当N很大时,次极大似乎完全消逝,形成明锐主极大的宽广连续暗的背景。这一结论,为光栅设计和优化提供较强的理论依据,对光栅衍射及其实验教学具有一定的应用价值。
through the study of transmission grating slit number to the intensity distribution of diffraction effect with the help of Matlab programming, it finds out： the main great width decreases with the slit number increasing, increases its strength with the slit number increasing; The more N is, the smaller the line width of the secondary maximum grating fringe and the weaker the light intensity is; when N reaches a very big value, the secondary maximum seems to vanish completely, forming a sharp primary maximum, broad and continuously dark background. This conclusion provides theory basis to the grating design and optimization,and it has certain application value on the grating diffraction and its experimental teaching. Key words： optical grating; the intensity of diffraction; the visualization of teaching
出处
《兴义民族师范学院学报》
2014年第2期81-85,90,共6页
Journal of Minzu Normal University of Xingyi
基金
贵州省大学生创新训练一般项目(201310666004)
贵州省高等学校教学内容和课程体系改革项目(黔教高发〔2012〕426号)
贵州省黔西南州科技局科技计划项目(2013-5)
兴义民族师范学院科研项目(12XYYZ05)
关键词
MATLAB
光栅
衍射光强
可视化教学
optical grating
the intensity of diffraction
the visualization of teaching
