被动综合孔径光子成像空间分辨率分析

Spatial Resolution of Passive Synthetic Aperture Photonic Imaging

分析了被动天线阵列接收信号在成像系统中的相位传输过程,并将被动综合孔径光子成像与光综合孔径成像做对比研究,利用阵列缩比因子定义了成像系统的空间分辨率因子;分别通过对天线阵列分辨率和光纤阵列的空间分辨率的分析,深入讨论了缩比因子和空间分辨率因子对整个成像系统分辨率的影响,推导出空间分辨率的计算公式;通过仿真计算和分析,研究了天线接收辐射方向和缩比因子对空间分辨率因子的影响,以及二者对成像系统空间分辨率的综合影响,讨论了空间分辨率有关结论在被动综合孔径光子成像系统设计中的意义。

The phase transmission process of received radiation signals is analyzed.And the passive synthetic aperture imaging is compared with traditional optical synthetic aperture imaging,and the spatial resolution factor is defined based on array scaling factor.By the study of spatial resolutions of the antenna array and the fiber array,the influence of spatial resolution factor and array scaling factor on the spatial resolution in whole imaging system are discussed,and the spatial resolution equation is deduced for passive synthetic aperture imaging systems.Then the influences of array scaling factor and received radiation direction on the system′ spatial resolution are investigated respectively by simulations and calculations.In the end,the significances of the research results about the spatial resolution are emphasized in designing passive synthetic aperture photonic imaging systems.