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三子镜与三臂形稀疏孔径的对比研究

Comparative Research on Three Sub-Apertures and Three Arms Sparse Aperture Systems

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摘要

研究了三子镜结构与由6个子镜构成的三臂形稀疏孔径结构,分析了两种孔径结构的特点。从光瞳函数出发推导出三子镜与三臂形稀疏孔径结构的调制传递函数(MTF)解析式,在此基础上用Matlab软件模拟两种稀疏孔径的MTF图像,并对模拟结果进行分析与比较。结果表明:两种结构的MTF都呈均匀正六边形分布;填充因子同为22%时,三子镜结构在归一化频率0.3附近MTF出现零点,三臂结构在归一化频率0.15处出现零点;随着填充因子的增加,三子镜与三臂结构的MTF值提高,三臂结构MTF曲线比三子镜结构起伏小,但MTF值也小,信息丢失较多。ZEMAX模拟成像及图像增强结果表明三子镜整体成像效果要优于三臂结构。

Abstract

Two kinds of sparse aperture systems of three sub-apertures and three arms sparse aperture are researched, and the characteristics of this two kinds of sparse aperture configurations are analyzed. Modulation transfer functions (MTFs) of the three sub-apertures and three arms configurations are derived from the formulas of the pupil functions.Based on the formulas of MTF, MTF curves are simulated by Matlab. Comparing the MTFs of three sub-apertures and the three arms aperture, it is shows that MTFs of two kind of configurations are all arranged to uniform hexagon. When the fill factors are both at 20%, the MTFs of three sub-apertures and three arms aperture have zero frequency at the normalized spatial frequencies of 0.3 and 0.15, respectively. The MTFs of the two sparse aperture configurations become larger with the increase of the fill factor. The MTF curve of three arms aperture is more stable than that of three sub-apertures, but with smaller MTF values. As a result, three arms apertures lose more information. The results of imaging simulation and image enhancement of two sparse aperture configurations show that three sub-apertures configuration outperforms three arms aperture in imaging quality.

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中图分类号:O438.2

DOI:10.3788/lop50.121101

所属栏目:成像系统

责任编辑:胡冰

收稿日期:2013-07-21

修改稿日期:2013-09-06

网络出版日期:2013-11-15

作者单位    点击查看

王友清:苏州科技学院数理学院, 江苏 苏州 215009
谈志杰:苏州科技学院数理学院, 江苏 苏州 215009
范君柳:苏州科技学院数理学院, 江苏 苏州 215009
姜慧:苏州科技学院数理学院, 江苏 苏州 215009
陈莹:苏州科技学院数理学院, 江苏 苏州 215009
李聃:苏州科技学院数理学院, 江苏 苏州 215009
何心:苏州科技学院数理学院, 江苏 苏州 215009
吴泉英:苏州科技学院数理学院, 江苏 苏州 215009

联系人作者:王友清(917343255@qq.com)

备注:王友清(1991—),男,本科生,主要从事光学设计和光信息处理等方面的研究。

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引用该论文

Wang Youqing,Tan Zhijie,Fan Junliu,Jiang Hui,Chen Ying,Li Dan,He Xin,Wu Quanying. Comparative Research on Three Sub-Apertures and Three Arms Sparse Aperture Systems[J]. Laser & Optoelectronics Progress, 2013, 50(12): 121101

王友清,谈志杰,范君柳,姜慧,陈莹,李聃,何心,吴泉英. 三子镜与三臂形稀疏孔径的对比研究[J]. 激光与光电子学进展, 2013, 50(12): 121101

被引情况

【1】胡孟孟,陈宝华,姜慧,李勋武,吴泉英. 三子镜稀疏孔径双反系统子镜装调误差对成像质量的影响. 激光与光电子学进展, 2015, 52(1): 11101--1

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