可调光程的差分偏振成像系统及其特性研究
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摘要
基于Wollaston棱镜角剪切和Savart偏光镜横向剪切组合的可调光程的差分偏振干涉成像光谱系统,不仅可同时获取目标正交偏振分量的干涉图和二维空间图,而且可以通过调整Savart偏光镜的厚度,得到不同光程差下正交偏振分量的干涉图像。该系统的显著特点是正交图像的同时获取和光程的实时改变。描述了可调光程的差分偏振干涉成像光谱系统结构、理论原理,推导出了干涉强度表达式。详细分析了可调光程的Savart偏光镜(MSP)和可调光程的宽视场型Savart偏光镜(MWSP)的光程差及横向剪切量的变化范围。通过两种偏光镜之间的对比可得光程差差别甚微但MWSP剪切量较大,且变化量比MSP高50%。这为以后选择Savart偏光镜类型提供了重要依据。
The polarization-difference interference imaging spectrum system with adjustable optical path based on the combination of the angular shear of Wollaston prism and the lateral shear of Savart polariscope,can not only simultaneously obtain the two-dimensional space image and the interference image in the orthogonal polarization direction of the target,but also obtain the interference image in the orthogonal polarization direction under different optical path differences by adjusting the thickness of Savart polariscope.The features of the system are simultaneous acquisition of orthogonal images and real-time adjustment of optical path.The structure and theoretical principle of the polarization-difference interference imaging spectrum system with adjustable optical path are demonstrated.Expressions for the interference intensity are derived as well.The variation ranges of the optical path difference and the lateral displacement for the modulated Savart polariscope(MSP)and the modulated wide-field-of-view Savart polariscope(MWSP)are analyzed in detail.Through the contrast it is concluded that the optical path difference is little while the lateral displacement of MWSP is 50% higher than that of MSP.The results provide important evidence for the type selection of the Savart polariscope.
The polarization-difference interference imaging spectrum system with adjustable optical path based on the combination of the angular shear of Wollaston prism and the lateral shear of Savart polariscope,can not only simultaneously obtain the two-dimensional space image and the interference image in the orthogonal polarization direction of the target,but also obtain the interference image in the orthogonal polarization direction under different optical path differences by adjusting the thickness of Savart polariscope.The features of the system are simultaneous acquisition of orthogonal images and real-time adjustment of optical path.The structure and theoretical principle of the polarization-difference interference imaging spectrum system with adjustable optical path are demonstrated.Expressions for the interference intensity are derived as well.The variation ranges of the optical path difference and the lateral displacement for the modulated Savart polariscope(MSP)and the modulated wide-field-of-view Savart polariscope(MWSP)are analyzed in detail.Through the contrast it is concluded that the optical path difference is little while the lateral displacement of MWSP is 50% higher than that of MSP.The results provide important evidence for the type selection of the Savart polariscope.
引文
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[17]Bénière A,Alouini M,Goudail F,et al.Design and experimental validation of a snapshot polarization contrast imager[J].Applied Optics,2009,48(30):5764-5773.
[18]Mu T,Zhang C,Zhao B.Principle and analysis of a polarization imaging spectrometer[J].Applied Optics,2009,48(12):2333-2341.
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[3]Xingli Bin,Wang Zhonghou,Liu Xuebin,et al.Hyperspectral imager of the environment and disaster monitoring small satellite[J].Remote Sensing Technology and Application,2009,24(3):257-262.相里斌,王忠厚,刘学斌,等.环境与灾害监测预报小卫星"高光谱成像仪[J].遥感技术与应用,2009,24(3):257-262.
[4]Liu Xinjie,Liu Liangyun,Li Xuzhi,et al.Comparision on classification results based on date of TG-1and HJ-1CCD[J].Remote Sensing Information,2013,28(3):74-79.刘新杰,刘良云,李绪志,等.天宫一号高光谱成像仪数据与环境星CCD数据分类效果比较研究[J].遥感信息,2013,28(3):74-79.
[5]Zhang C,Xiangli B,Zhao B,et al.A static polarization imaging spectrometer based on a Savart polariscope[J].Optics Communications,2002,203(1/2):21-26.
[6]Zhang C M,Yan X G,Zhao B.A novel model for obtaining interferogram and spectrum based on the temporarily and spatially mixed modulated polarization interference imaging spectrometer[J].Optics Communications,2008,281(8):2050-2056.
[7]Zhang C,Li Q,Yan T,et al.High throughput static channeled interference imaging spectropolarimeter based on a Savart polariscope[J].Optics Express,2016,24(20):23314-23332.
[8]Zhang C M,Zhao B C,Xiangli B.Wide-field-of-view polarization interference imaging spectrometer[J].Applied Optics,2004,43(33):6090-6094.
[9]Hu Qiaoyun,Yang Weifeng,Hu Yadong,et al.Principle and simulation of a spatially modulated full Stokes parameters polarization imaging system[J].Acta Optica Sinica,2015,35(2):0211004.胡巧云,杨伟锋,胡亚东,等.空间调制型全Stokes参量偏振成像系统原理及仿真[J].光学学报,2015,35(2):0211004.
[10]Liu Jing,Jin Weiqi,Wang Yahui,et al.Design of simultaneous imaging polarimetry with double separate Wollaston prism[J].Acta Optica Sinica,2015,35(5):0511001.刘敬,金伟其,王亚慧,等.双分离渥拉斯顿棱镜同时偏振成像系统设计[J].光学学报,2015,35(5):0511001.
[11]Mu T,Zhang C,Ren W,et al.Static polarization-difference interference imaging spectrometer[J].Optics Letters,2012,37(17):3507-3509.
[12]Mu Tingkui,Zhang Chunmin,Li Qiwei,et al.The polarization-difference interference imaging spectrometer-I爛Concept,principle,and operation[J].Acta Physica Sinica,2014,63(11):110704.穆廷魁,张淳民,李祺伟,等.差分偏振干涉成像光谱仪I.概念原理与操作[J].物理学报,2014,63(11):110704.
[13]Mu Tingkui,Zhang Chunmin,Li Qiwei,et al.The polarization-difference interference imaging spectrometer-II爛Optical design and analysis[J].Acta Physica Sinica,2014,63(11):110705.穆廷魁,张淳民,李祺伟,等.差分偏振干涉成像光谱仪II.光学设计与分析[J].物理学报.2014,63(11):110705.
[14]Rowe M P,Pugh E N,Jr,Tyo J S,et al.Polarization-difference imaging:a biologically inspired technique for observation through scattering media[J].Optics Letters,1995,20(6):608-610.
[15]Tyo J S,Rowe M P,Pugh E N,Jr,et al.Target detection in optically scattering media by polarization-difference imaging[J].Applied Optics,1996,35(11):1855-1870.
[16]Zhu Y,Shi J,Yang Y,et al.Polarization difference ghost imaging[J].Applied Optics,2015,54(6):1279-1284.
[17]Bénière A,Alouini M,Goudail F,et al.Design and experimental validation of a snapshot polarization contrast imager[J].Applied Optics,2009,48(30):5764-5773.
[18]Mu T,Zhang C,Zhao B.Principle and analysis of a polarization imaging spectrometer[J].Applied Optics,2009,48(12):2333-2341.