光学复用大视场成像研究  

Optically Multiplexed Imaging for Increased Field of View

作　　者：周亮[1] 刘凯[1] 刘朝晖[1] 段晶[1] 李治国[1] ZHOU Liang;LIU Kai;LIU Zhao-hui;DUAN Jing;LI Zhi-guo(Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China)

机构地区：[1]中国科学院西安光学精密机械研究所,西安710119

出　　处：《光子学报》2020年第9期126-132,共7页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61805275);中国科学院“西部之光”人才培养引进计划(No.XAB2017B27)。

摘　　要：为了简化光学复用成像系统复杂度和降低对编码方式的要求,基于反射镜旋转完成通道编码,构建了结合分束镜和光学成像系统实现双通道混叠成像的实验装置.为实现混叠图像的有效解混叠,提出了利用特征点检测与匹配方法实现多幅混叠图像之间平移量的自动识别,进而构建出具有亚像素精度的双通道光学复用成像系统的系统复用矩阵,并采用梯度投影稀疏重建算法完成基于多幅图像的双通道图像重建,最终实验实现了光学成像系统视场角的2倍放大.此外,对所提方法在其他场景的适应性也进行了实验验证,表明了其可在不改变焦平面探测器的情况下实现光学成像系统视场角的有效放大,大大节约了大视场光学成像系统的研制成本.In order to simplify the multiplexing architecture and encoding method,a two-channels multiplexed imaging architecture was constructed with rotation encoding mirror,beamsplitter and optically imaging system.The subpixel accuracy shifts between superimposed images were proposed to automatically decide with features detection and registration.The system multiplexed matrics were built with the known shifts and the gradient projection for sparse reconstruction method was adopted to reconstruction the respctive scene based on six frames.The increase of field of view was verified with 2 times in the proposed realistic setting.Also,the proposed method can sucessfully disambiguate other scenes,which demonstrates its wide range of application.This method can effectively increase the field of view with the same focal plane array,and can be cost effective in developing wide field of view optically imaging system.

关 键 词：复用成像 大视场 通道编码 复用矩阵 解混叠 

分 类 号：O439[机械工程—光学工程]