Experimental research of circular incoherently synthetic aperture imaging ladar using chirped-laser and heterodyne detection  

作　　者：严毅 孙建锋 金晓峰 周煜 职亚楠 刘立人 

机构地区：[1]Key Laboratory of Space Laser Communication and Testing Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2012年第9期30-34,共5页中国光学快报（英文版）

基　　金：supported by the Key Laboratory of Space Laser Communication and Testing Technology of the Chinese Academy of Sciences and the National Nature Science Foundation of China (No. 61108069)

摘　　要：Synthetic aperture imaging ladar （SAIL） technique belongs fully coherent processing in both the time domain and space domain and has a rather high implement difficulty. To solve this problem, the concept of circular incoherently SAIL is introduced. A speckle version image of a two-dimensional （2D） letter ＇E＇ target is reconstructed from E-field projection data detected by a circular incoherently SAIL system. The experimental system is constructed by three subsystems using chirped-pulse laser as the light source and heterodyne detection to get the range information of the target. The reconstruction of the image and the noise effect are also discussed in detail.Synthetic aperture imaging ladar （SAIL） technique belongs fully coherent processing in both the time domain and space domain and has a rather high implement difficulty. To solve this problem, the concept of circular incoherently SAIL is introduced. A speckle version image of a two-dimensional （2D） letter ＇E＇ target is reconstructed from E-field projection data detected by a circular incoherently SAIL system. The experimental system is constructed by three subsystems using chirped-pulse laser as the light source and heterodyne detection to get the range information of the target. The reconstruction of the image and the noise effect are also discussed in detail.

关 键 词：Computerized tomography HETERODYNING Image reconstruction Light sources Synthetic apertures Time domain analysis 

分 类 号：TN958.98[电子电信—信号与信息处理] TN929.11[电子电信—信息与通信工程]