基于条纹管的压缩超快成像系统理论模拟  

Simulation of compressed ultrafast imaging system based on streak tube

作　　者：刘俊凯 邓萱 杨恺知 罗秋燕 牛丽红[1] 张敬金 刘进元[1] 蔡厚智[1] 向利娟 LIU Junkai;DENG Xuan;YANG Kaizhi;LUO Qiuyan;NIU Lihong;ZHANG Jingjin;LIU Jinyuan;CAI Houzhi;XIANG Lijuan(Key Laboratory of Optoelectronic Devices and Systems of Minitry of Education and Guangdong Province,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]深圳大学光电子器件与系统教育部/广东省重点实验室物理与光电工程学院,广东深圳518060

出　　处：《应用光学》2024年第2期385-390,共6页Journal of Applied Optics

基　　金：国家自然科学基金(11775147,62001301);广东省基础与应用基础研究基金(2019A1515011474,2019A1515110130);深圳市科技计划项目(JCYJ20190808115605501,JCYJ20200109105201936,JCYJ20210324095007020,JCYJ20220814133504001)。

摘　　要：对基于压缩感知和条纹相机的压缩超快成像系统进行模拟仿真,原始三维图像I(x-y-t)经数字微镜设备(digital micromirror devices,DMD)进行编码调制,然后传输至狭缝全开条纹变像管,经偏转电场作用后,多幅不同时间图像将叠加,并在CCD上输出最后积分图像。采用总变分还原算法将CCD积分图像重构出多幅原始图像I(x-y-t)。对压缩超快成像系统的图像采集过程及还原算法进行了模拟仿真,获得了激光在空气介质中传输过程的8幅动态二维图像,每幅图像的曝光时间为12.5 ps,重构信号与原始信号的相似度为92%。A compressed ultrafast imaging system based on compressed sensing and streak camera was simulated.The original 3D image,denoted as I(x-y-t),was encoded and modulated by using digital micromirror devices(DMD),and subsequently transmitted to a slit full-open streak image converter.By means of deflection via a deflecting electric field,the multiple images at various time points were superimposed,resulting in the generation of the final integral image on the CCD.To reconstruct multiple original images I(x-y-t)from the CCD integral images,a total variational restoration algorithm was employed.The process of image acquisition and the restoration algorithm within the compressed ultrafast imaging system was simulated,and the eight dynamic 2D images depicting laser transmission through an air medium were obtained.Each image is exposed for a duration of 12.5 ps,and the reconstructed signal demonstrates a similarity of 0.92 when compared to the original signal.

关 键 词：超快诊断 条纹相机 压缩感知 时间分辨率 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]