单色点源圆孔衍射的数值模拟实验  

The Numerical Simulation Experiment of the Circular Aperture Diffraction Irradiated by a Monochromatic Point Source

作　　者：常山[1] 毛杰健[1] 桑志文[1] 朱品珍[1] 高志强[2] 

机构地区：[1]上饶师范学院物理与电子信息系,江西上饶334001 [2]浙江师范大学信息光学研究所,浙江金华321004

出　　处：《实验室研究与探索》2010年第6期14-17,共4页Research and Exploration In Laboratory

基　　金：江西省自然科学基金(2008GZS0045);江西省"物理学"特色专业建设项目;上饶师范学院2009年教改课题基金资助项目

摘　　要：根据平面屏衍射的特点,由菲涅尔-基尔霍夫衍射公式得到单色点源圆孔衍射的积分表达式,然后提出了单色点源圆孔衍射的一种数值计算方法,用Matlab软件进行计算机数值模拟实验研究单色点源照射圆孔产生衍射的傍轴区的光场,有助于对相关衍射实验及衍射理论与技术的进一步研究。这种计算机仿真方法扩展了衍射问题的研究途径与方法,具有一定的应用价值,尤其对于教学具有直观作用。According to the characteristic of flat-screen diffraction, the integral expression for the diffraction field of a circular aperture irradiated by a monochromatic point source was gotten from Fresnel-Kirchhoff＇ s diffraction formula. A numerical calculation method for the diffraction field of a circular aperture irradiated by a monochromatic point source was proposed, and then with the Matlab software this calculation method was used to carry out a numerical simulation experiment on computer to study the paraxial diffraction field of a circular aperture irradiated by a monochromatic pointsource. These are helpful to further study the relevant diffraction experiment and the diffraction theory and technology. This kind of computer simulation method extends the study ways and means of the diffraction problem, and has some application value, especially has a visual effect for teaching.

关 键 词：点源圆孔衍射 菲涅尔-基尔霍夫衍射公式 不充分衍射 菲涅尔衍射 夫琅禾费衍射 数值模拟实验 

分 类 号：O436.1[机械工程—光学工程]