两种对称型稀疏孔径系统的成像研究  

Imaging Research On Sparse-aperture Systems of Symmetrical Configuration

作　　者：吴泉英[1,2] 钱霖[1,3] 沈为民[1] 

机构地区：[1]苏州大学江苏省现代光学技术重点实验室 [2]苏州科技学院实验中心,苏州215009 [3]苏州大学物理科学与技术学院光电系,苏州215006

出　　处：《光子学报》2006年第8期1259-1262,共4页Acta Photonica Sinica

基　　金：江苏省自然科学基金(批准号:BK2004202);高等学校博士学科点专项科研基金(课题号:20040285001);江苏省现代光学技术重点实验室开放课题资助(课题号:T8108030)

摘　　要：提出了复合三子镜稀疏孔径结构,它由九个子镜组成,每三个子镜组成一个次级光瞳,三个次级光瞳组成一个主光瞳,其结构是对称的冗余结构.研究了三臂和复合三子镜两种对称型结构稀疏孔径系统,比较复合三子镜和三臂结构的特点与调制传递函数,对不同填充因子的两种结构的稀疏孔径模拟成像和维纳滤波,并进行像质评价,同时和非冗余的Golay6结构进行比较.结果表明复合三子镜稀疏孔径系统在结构分布、成像质量等方面优于三臂对称结构稀疏孔径系统,对称型稀疏孔径系统在结构排列上具有对称易装调的优点.A sparse-aperture design named dual three sub-apertures, which is composed of nine subapertures, is proposed. Each three sub-- apertures make up of a sub-pupil, three sub-pupils make up of a main pupil. The configuration of dual three sub--apertures is symmetrical and redundant. The symmetrical sparse-aperture systems of three arms and dual three sub-apertures are researched. The feature and Modulation Transfer function （MTF） are compared between dual three sub-aperturesr and three armsp. Image simulation and Wiener filter of the two kinds of symmetrical sparse apertures are illuminated with different fill factors, and image quality is evaluated. The nonredundant sparse aperture of Golay6 is also compared. The results show that the configuration and image quality of dual three sub-aertures are better than three armsr. The symmetrical configuration of sparse aperture systems has the advantages of flexible configuration and easy fabrication.

关 键 词：空间遥感 稀疏孔径 对称结构 调制传递函数 

分 类 号：O436.1[机械工程—光学工程]