高斯光束的4F光学系统空间滤波效应模拟与实验验证

doi:10.14139/j.cnki.cn22-1228.2020.01.003

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摘要

以频谱的傅立叶变换与空间滤波理论为基础，对高斯光束的经过4F光学系统的空间滤波后光强、相位调制进行了理论分析；利用MATLAB数学软件模拟了“光”字屏经过4F系统频谱面高通、低通滤波后形成的图像；自行设计微分屏，通过改变衍射光的相位实现了边缘增强的动态效果模拟，实验现象与以上模拟结果完全吻合。理论模拟可以生动、深入地揭示高斯光束在4F光学系统中傅立叶变换与空间滤波物理内涵，其模拟方法与效果展示可以为功能型滤波器的设计提供参考。

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关键词: 高斯光束 4F光学系统傅立叶频谱分析空间滤波 MATLAB

Abstract:

Based on the Fourier transform and spatial filtering theory of spectrum, the theoretical analysis of the light intensity and phase modulation of Gaussian beam after spatial filtering by 4F system is carried out. The MATLAB mathematics software is used to simulate the image formed by the high-pass and low-pass filtering of the "light" screen after 4F system. The differential screen was designed by ourselves, and the edge enhancement effect was realized by changing the phase of the diffracted light. The simulation results are in good agreement with the experimental data. Through theoretical simulation, the physical connotation of Gaussian beam Fourier transform and spatial filtering optical phenomena is vividly and deeply revealed, which lays a foundation for the design and effect demonstration of functional filters.

Key words: Gaussian beam F system Fourier spectrum analysis spatial filtering MATLAB

出版日期: 2020-02-25 发布日期: 2020-02-25 整期出版日期: 2020-02-25

ZTFLH:

O433.1

引用本文:

邓莉, 刘扬, 张汉中, 周科卫, 赵国汝, 魏鸾仪, 钎钎, 黄婉慧, 秦菱泽. 高斯光束的4F光学系统空间滤波效应模拟与实验验证 [J]. 大学物理实验, 2020, 33(1): 10-16.
DENG Li, LIU Yang, ZHANG Hangzhong, ZHOU Kewei, ZHAO guoru, WEI luanyi. MATLAB simulation of Fourier transform of Gaussian beam and the spatial filtering effects basing on 4F optical imaging system . Physical Experiment of College, 2020, 33(1): 10-16.

链接本文:

http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2020.01.003 或 http://dawushiyan.jlict.edu.cn/CN/Y2020/V33/I1/10

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