基于双Wollaston棱镜的静态光谱偏振成像系统设计  

Design of Static Spectral Polarization Imaging System with Double Wollaston Prism

作　　者：赵义武[1,2] 段云 李英超[1,2] 史浩东 江伦[1] 王超[1] 刘壮[1] 李冠霖 ZHAO Yiwu;DUAN Yun;LI Yingchao;SHI Haodong;JIANG Lun;WANG Chao;LIU Zhuang;LI Guanlin(NUERC of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,Jilin,China;Defense Key Subject Laboratory of Aero and Ground Laser Communication Technology,Changchun University of Science andTechnology,Changchun 130022,Jilin,China;School of Optoelectronic Engineering,Changchun University of Science andTechnology,Changchun 130022,Jilin,China;Jilin Province Key Laboratory of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,Jilin,China)

机构地区：[1]长春理工大学空间光电技术国家地方联合工程研究中心,吉林长春130022 [2]长春理工大学空地激光通信技术重点学科实验室,吉林长春130022 [3]长春理工大学光电工程学院,吉林长春130022 [4]长春理工大学空间光电技术吉林省重点实验室,吉林长春130022

出　　处：《兵工学报》2019年第8期1658-1664,共7页Acta Armamentarii

基　　金：国家重点研发计划项目(2017YFC0803806);国家自然科学基金重大项目(61890960);国家自然科学基金委员会-中国科学院天文联合基金项目(U1731240)

摘　　要：针对传统光谱偏振成像系统存在的结构复杂或有运动部件等问题,提出一种基于双Wollaston棱镜的静态光谱偏振成像系统结构。根据Stokes光谱调制理论,并利用双Wollaston棱镜的偏振特性与分光原理,设计了含有双Wollaston棱镜的静态光谱偏振成像系统。系统前置望远系统采用像方远心设计,后置偏振光谱分光系统采用物方远心设计,以实现光瞳匹配;整体结构均选用球面镜,且无运动部件,可同时获取目标的光谱和偏振信息,系统工作波段为450~900nm,焦距为275mm,口径为90mm,视场角为2.35°.分析结果表明:系统全视场调制传递函数在奈奎斯特频率90lp/mm处优于0.55,成像质量接近衍射极限,满足成像需求。A static spectral polarization imaging system based on double Wollaston prism is proposed for the complex structure or moving parts of traditional spectral polarization imaging systems.According to the Stokes spectral modulation theory,a static spectral polarization imaging system with dual Wollaston prism is designed by using the polarization characteristics and beamsplitting principle of double Wollaston prism.The image side telecentric design is used for the pre-telescope system,and the object side telecentric design is used for the post-spectral polarization splitting system to achieve pupil matching.The whole structure adopts a spherical mirror and has no moving parts.It can simultaneously acquire the spectral and polarization information of target.The operating wavelength of the system is 450-900 nm,the focal length is 275 mm,the aperture is 90 mm,and the field of view is 2.35°.The analysis results show that full-field-of-view modulation transfer function(MTF)of the system is better than 0.55 at the Nyquist frequency of 90 lp/mm,and the imaging quality is close to the diffraction limit,which satisfies the imaging requirements.

关 键 词：光谱偏振 双Wollaston棱镜 仿真设计 

分 类 号：O434.13[机械工程—光学工程]