光子计数计算鬼成像  

Photon Counting Computational Ghost Imaging

作　　者：李明飞[1,2] 袁梓豪 刘院省 邓意成[1,2] Li Mingei;Yuan Zihao;Liu Yuanxing;Deng Yicheng(Beijing Institute of Aerospace Control Devices,Beijing 100039,China;Quantum Engineering Resecarch Center,China Aerospace Science and Technology Corporation,Beijing 10094,China)

机构地区：[1]北京航天控制仪器研究所,北京100039 [2]中国航天科技集团有限公司量子工程研究中心,北京100094

出　　处：《激光与光电子学进展》2021年第10期306-313,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61805006)。

摘　　要：为实现远距离、高灵敏的三维成像,开展了光子计数计算鬼成像研究。通过振幅型空间光调制器,实现了基于离散余弦变换矩阵和Walsh变换矩阵作为测量基的结构光照明,采用单光子探测技术实现了700m距离、高灵敏的三维成像。对比研究了快速傅里叶变换算法和迭代优化算法的重建结果。研究表明,相同采样率时,离散余弦测量基作为观测矩阵时重建图像的误差比Walsh观测矩阵小,但Walsh观测矩阵重建图像的分辨率更高。计算鬼成像分辨率理论上不受接收镜头術射极限限制,但实际受接收镜头集光效率、单光子探测器计数率、积分时间等影响,本文搭建的实验系统实现了成像分辨率达到接收镜头瑞利衍射极限分辨率2倍的成像结果。光子计数计算鬼成像无需转台或扫描镜等移动部件,具有弱光条件下凝视远距离目标并进行三维成像的能力。研究方法对基于光子计数的单像素成像技术和计算鬼成像技术研究具有一定参考价值。To realize long-distance,highly sensitivity three-dimensional imaging,photon counting computational ghost imaging has been researched in experiments.Structured light ilumination is realized using an amplitude-type spatial light modulator based on a discrete cosine transform matrix or Walsh transform matrix as the measurement basis,and singlephoton detection technology is used to achieve a 700 m distance,highly sensitivity three-dimensional imaging.Two algorithms,fast Fourier transform and iterative optimization,are researched and compared.The error in images reconstructed by the discrete cosine measurement basis is smaller than that in images reconstructed by the Walsh observation matrix under the same sampling rate,while the resolution of images reconstructed by the Walsh observation matrix is higher.Theoretically,the resolution of the computational ghost imaging system is not restricted by the diffraction limit of the receiving lens;however,resolution is still affected by the collection eficiency of the receiving lens,the counting rate of the single photon detector,and exposure time,among others.We demonstrated that the imaging resolution of our experimental system improved on the Rayleigh diffraction limit resolution of the receiving lens by a factor of two.The photon counting computational ghost imaging scheme has the potential to visualize the imaging target in three dimensions under weak ilumnination,without the need of a rotating platform and scanning mirror.Our research method has reference value for research on single pixel imaging technology based on photon counting and computational ghost imaging technology.

关 键 词：成像系统 光子计数 计算鬼成像 单像素成像 单光子 

分 类 号：O431.2[机械工程—光学工程]