泊松亮斑的实验与仿真研究
Experiment and simulation study on poisson spot
任常愚 1王俊 2陈宇凯3
作者信息
- 1. 福州外语外贸学院 智能制造学院,福州 350000
- 2. 哈尔滨工业大学 物理学院,哈尔滨 150001
- 3. 安庆师范大学 数理学院,安徽 安庆 246133
- 折叠
摘要
为实现对泊松亮斑的精确调控,探究这一重要的波动光学实验现象.基于实验和仿真研究入射光波长、圆屏直径和衍射距离等因素对泊松亮斑直径大小和强度的影响.结果表明,圆形障碍物的直径越大,衍射形成的泊松亮斑直径越小,入射光波长和衍射距离越大,衍射形成的泊松亮斑直径越大.泊松亮斑强度与圆形障碍物的直径呈负相关,在一定范围内与衍射距离和入射光波长呈正相关.当衍射距离或入射光波长逐渐增大时,泊松亮斑强度增幅减小,甚至出现强度波动;圆屏直径越小或入射光波长越大,形成泊松亮斑所需的衍射距离越短.
Abstract
This paper is an attempt to achieve the accurate control of Poisson spot in the wave optics experiments.The study is focused on the effects of incident light wavelength,circular disk diameter and diffraction distance on the diameter and intensity of Poisson spot based on the experiments and simula-tions.The results show that the larger the diameter of the circular block,the smaller the diameter of the diffracted Poisson spot is;and as the wavelength of the incident light and the diffraction distance in-crease,the diameter of the diffracted Poisson spot also increases.The intensity of the Poisson spot is neg-atively correlated with the diameter of the circular disk and positively correlated with the diffraction dis-tance and the wavelength of the incident light within a certain range.As the diffraction distance or inci-dent light wavelength gradually increases,the increase in intensity of the Poisson spot decreases,and e-ven intensity fluctuations may occur.The smaller the diameter of the circular disk or the larger the wave-length of the incident light is,the shorter the diffraction distance deeded to form the Poisson spot is.
关键词
菲涅耳衍射/泊松亮斑/演示实验Key words
fresnel diffraction/poisson spot/demonstration experiment引用本文复制引用
基金项目
黑龙江省省属本科高等学校基本科研业务费项目(2020-KYYWF-0703)
出版年
2024
国家科技期刊平台
NSTL
万方数据