梯度折射率介质下的光路计算与成像研究  

Optical Path Calculation and Imaging Study in Gradient Index Media

作　　者：宋月 陈欣雨 杨锐涵 吴宇豪 程才 刘科[1] SONG Yue;CHEN Xinyu;YANY Ruihan;WU Yuhao;CHENG Cai;LIU Ke(College of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610101,China)

机构地区：[1]四川师范大学物理与电子工程学院,四川成都610101

出　　处：《大学物理实验》2021年第4期52-56,共5页Physical Experiment of College

基　　金：四川师范大学开放实验项目(KFSY2020027);四川师范大学校级自制仪器项目(ZZYQ2020009)。

摘　　要：使用激光照射具有梯度折射率的介质将形成海市蜃楼现象的光路轨迹“可视化”。主要研究了不同波长的激光在线性和非线性梯度折射率介质中的光路轨迹和成像情况。基于几何光学原理推导了光路方程并使用Matlab光线追迹算法计算了线性和非线性情况下的成像。实验上,通过自制仪器配置有折射率梯度的溶液并观察光路轨迹以及拍摄实物成像。实验拍摄的光路轨迹与理论推导基本一致,为海市蜃楼等现象的演示以及成像问题的研究提供了新的参考。The optical path of mirage can be“visualized”by laser irradiation of gradient-index media.The optical path trajectories and imaging problems of different wavelengths of lasers in linear and nonlinear gradient-index media are mainly studied.Based on the principle of geometrical optics,the optical path equation is derived and the imaging in linear and nonlinear cases is calculated by using the Matlab ray tracing algorithm.In the experiment,a self-made device was used to configure the solution with refractive index gradient,observe the optical path and take the physics images.The obtained optical path trajectories are basically consistent with the theoretical derivation,which provides an effective reference for the demonstration of mirage phenomena and the study of imaging problems.

关 键 词：激光 光路轨迹“可视化” 海市蜃楼 折射率梯度介质 Matlab计算成像 

分 类 号：G305[文化科学]