摘要
夫琅和费衍射是光的衍射现象中的一个重要类型。这类衍射现象的典型实验装置是单狭缝、多缝(平面光栅)和圆孔。对其光强分布函数的推导,可采用菲涅耳积分的方法。但这种方法的数学推演过程比较复杂,也不太直观,学生掌握有一定困难。本文试图从振动的矢量模型出发,利用这三种开孔的几何形状都具有对称的特点,取其几何中心为周相参考点,从而比较简洁和直观地导出它们的光强分布函数。
In this paper, distribution functions of light intensity for single slit, many slits (plane gratings) and circular aperture are derived from vector model of vibration.In the derivation, we use geometrical symmetry of the slit and let the vibration phase of zone element in c(?)nter of the slit at observation point as reference phase.Therefore, the process of derivation is more succinct and more audio—visual.
出处
《南京邮电学院学报》
北大核心
1992年第1期106-111,共6页
Journal of Nanjing University of Posts and Telecommunications(Natural Science)
关键词
衍射模型
发光强度
分布函数
Diffraction Model
Fraunhofer diffraction
Luminous intensity
Distribution function
