An improved scheme for passive synthetic aperture photonic imaging  

作　　者：何云涛 江月松 

机构地区：[1]School of Electronic and Information Engineering, University of Aeronatics and Astronautics

出　　处：《Optoelectronics Letters》2009年第5期393-396,共4页光电子快报（英文版）

基　　金：supported by the National "863 Program" of China (No. 2007AA12Z114)

摘　　要：An improved scheme for passive synthetic aperture imaging is proposed. With this new technique,the radiation signal from field of view (FOV) is received and its frequency is down-converted to intermediate frequency (IF). The IF signals are modulated to light-wave by electro-optical phase modulators and transmitted in fiber. At the end of the fiber,a downscaled fiber array is formed according to the receiver array. The image of FOV is obtained with the fiber array. The principles of passive synthetic aperture photonic imaging technique are analyzed deeply and its properties are compared with traditional imaging method of synthetic aperture. By simulation,the spread function of spot source and the image signal-noise-ratio are investigated using the new imaging approach with FOV radiation from different incidence angles. The introduced scheme can reconstruct the target image and perfect the present synthetic aperture imaging systems.An improved scheme for passive synthetic aperture imaging is proposed. With this new technique, the radiation signal from field of view （FOV） is received and its frequency is down-converted to intermediate frequency （IF）. The IF signals are modulated to light-wave by electro-optical phase modulators and transmitted in fiber. At the end of the fiber, a downscaled fiber array is formed according to the receiver array. The image of FOV is obtained with the fiber array. The principles of passive synthetic aperture photonic imaging technique are analyzed deeply and its properties are compared with traditional imaging method of synthetic aperture. By simulation, the spread function of spot source and the image signal-noise-ratio are investigated using the new imaging approach with FOV radiation from different incidence angles. The introduced scheme can reconstruct the target image and perfect the present synthetic aperture imaging systems.

关 键 词：合成孔径成像 光子 电光相位调制器 光纤阵列 辐射信号 成像技术 图像信号 接收频率 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]