Research on the Design and Processing of the Image Transmission System Based on Fiber Bundles
何晓杰 1卜鑫链 1王春明 1汪枫林1
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作者信息
1. 国网江苏省电力有限公司靖江市供电分公司 江苏泰州 214500
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摘要
针对传统的传像系统易受电磁干扰的问题,设计并实现了在特殊环境下使用的光纤束传像系统.利用ZEMAX光学仿真软件,设计出了一个工作波段为可见光,全视场80°,焦距为5 mm的监控物镜.该物镜各视场光学调制传递函数(Modulation Transfer Function,MTF)值在空间频率36 lp/mm处大于0.8,点列图最大弥散斑均方根半径(RMS radius)为3.031 μm,接近衍射极限,因此具有较高成像质量.采用加工的物镜、选型转接镜及光纤束等核心器件,搭建了传像系统.通过测试光纤束图像传输系统的抗电磁干扰性能,采用高斯低通滤波结合DCT同态滤波算法有效去除图像的像素,获得了高质量的信息传输效果.
Abstract
In order to solve the problem that the traditional image transmission system is susceptible to electromag-netic interference,a fiber bundle image transmission system used in the special environment is designed and imple-mented.ZEMAX optical simulation software is used,a monitoring objective with an operating band of visible light,a full field of view of 80° and a focal length of 5mm is designed.The optical modulation transfer function(MTF)value of each field of view of the objective is greater than 0.8 at the spatial frequency of 36lp/mm,and the maxi-mum root mean square(RMS)radius of the diffuse spot in the point plot is 3.031 μ m,which approaches the dif-fraction limit,so it has high imaging quality.The image transmission system is built by the core components such as processed objective lenses,selected adapter lenses and fiber bundles.By testing the anti-electromagnetic interference performance of the fiber bundle image transmission system,the Gaussian low-pass is used to effectively remove the pixels of the image in combination with the DCT homomorphic filtering algorithm,and high-quality information transmission is obtained.
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