超近距离目标的虚拟透镜成像技术研究  

Research on Virtual Lens Imaging Technology for Ultra-close-range Targets

作　　者：张继龙 张继康 姚广峰 王栋 ZHANG Ji-long;ZHANG Ji-kang;YAO Guang-feng;WANG Dong(Suzhou Weimo Electronic Information Technology Co.,Ltd,Suzhou 215312,China;Unit 93221 of the PLA,Beijing 100085,China;Beijing Metstar Radar Co.,LTD,Beijing 100094,China)

机构地区：[1]苏州威陌电子信息科技有限公司,江苏苏州215312 [2]中国人民解放军93221部队,北京100085 [3]北京敏视达雷达有限公司,北京100094

出　　处：《中国电子科学研究院学报》2023年第3期253-257,共5页Journal of China Academy of Electronics and Information Technology

摘　　要：虚拟透镜成像技术是一种成像新技术,能够兼容不同的技术体制,并且适用于远、中、近不同距离目标的成像。虚拟透镜成像技术应用于超近距离目标的成像时,会出现成像失真甚至无法有效成像的问题。针对超近距离目标成像效果变差问题,通过分析虚拟透镜成像算法的成像聚焦机理,深入研究傍轴近似引起的相移误差对聚焦性能的影响,给出了最大相移误差与最小焦距之间的关系,提出了幅度加权降低傍轴近似引起的相移误差影响的方案,改善了超近距离目标的成像效果,仿真结果验证了所提方法的有效性。Virtual lens imaging is a new imaging technology.It can be compatible with different technical systems and is suitable for imaging targets at different distance,medium distance and near distance.When the virtual lens imaging technology is applied to the imaging of ultra-close range targets,the problem of imaging distortion or even ineffective imaging will occur.Aiming at the problem of poor imaging effect of ultra-close range target,the imaging focusing mechanism of virtual lens imaging algorithm is analyzed.The effect of phase shift error caused by paraxial approximation on focusing performance is studied.The relationship between the maximum phase shift error and the minimum focal length is given.An amplitude weighting scheme to reduce the effect of phase shift error caused by paraxial approximation is proposed to improve the imaging effect of ultra-close range targets.Simulation results demonstrate the effectiveness of the proposed method.

关 键 词：虚拟透镜成像 微波成像 雷达 超近距离 幅度加权 

分 类 号：TN015[电子电信—物理电子学] TN957.52