矩形光瞳下双巴比涅型消偏器的设计与分析
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摘要
建立了矩形光瞳下适用于双巴比涅型消偏器的消偏理论及数值计算模型,弥补了当前设计理论仅适用于圆形光瞳的不足。设计了一种适用于矩形光束口径且高度可靠的双巴比涅型消偏器。在确定最佳结构参数的基础上,分析了晶体折射率和中心厚度差的误差要求。结果表明,退偏器出射光的最大残余偏振度小于2%,四像最大间距约为27μm,满足偏振灵敏度及像质要求。
The depolarization theory and numerical calculation model for a dual Babinet depolarizer applied to rectangular pupils are built,which makes up the deficiency of the current design theories only suitable for circular pupils.A type of dual Babinet depolarizer with high reliability which can be applied to rectangular pupils is designed.On the basis of the optimal structural parameters,the error requirements of the refractive index and the central thickness difference of crystals are analyzed.The results show that the maximum residual polarization degree of the output light from the depolarizer is less than 2% and the maximum separation distance for the four images is27μm.The design requirements of polarization sensitivity and image quality are satisfied.
The depolarization theory and numerical calculation model for a dual Babinet depolarizer applied to rectangular pupils are built,which makes up the deficiency of the current design theories only suitable for circular pupils.A type of dual Babinet depolarizer with high reliability which can be applied to rectangular pupils is designed.On the basis of the optimal structural parameters,the error requirements of the refractive index and the central thickness difference of crystals are analyzed.The results show that the maximum residual polarization degree of the output light from the depolarizer is less than 2% and the maximum separation distance for the four images is27μm.The design requirements of polarization sensitivity and image quality are satisfied.
引文
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[2]Zhang X L.Linear depolarization ratios characteristics of dust aerosol particles model[J].Acta Optica Sinica,2016,36(8):0829001.张小林.沙尘气溶胶粒子模型的线退偏比特性[J].光学学报,2016,36(8):0829001.
[3]Xianyu Z A,Hou L Z.Research on eliminating polarization characteristic of metal reflectors of double reflection[J].Spacecraft Recovery&Remote Sensing,2015,36(5):67-75.鲜于子安,侯立周.金属镜面双反射消偏研究[J].航天返回与遥感,2015,36(5):67-75.
[4]Morgan M F,Chipman R A,Torr D G.Measurement of the instrumental polarization of a high resolution ultraviolet spectrometer[J].Proceedings of SPIE,1989,1166:401-409.
[5]Breckinridge J B.Polarization properties of a grating spectrograph[J].Applied Optics,1971,10(2):286-294.
[6]Maymon P,Chipman R A.Linear polarization sensitivity specifications for spaceborne instruments[J].Proceedings of SPIE,1992,1746:148-156.
[7]Dubroca G,Richert M,Loiseaux D.Recent developments in the design and verification of crystalline polarization scramblers for space applications[J].Proceedings of SPIE,2015,9626:962622.
[8]Stephen C,Peter W,Chipman R A.Design and analysis of a depolarizer for the NASA moderateresolution imaging spectrometer-tilt[J].Proceedings of SPIE,1992,1746:375-385.
[9]Zhao F C,Wang S R,Qu Y,et al.Design and analysis of a depolarizer for the space-borne grating imaging spectrometer[J].Spectroscopy and Spectral Analysis,2011,31(7):1991-1994.赵发财,王淑荣,曲艺,等.星载光栅成像光谱仪的退偏器设计与分析[J].光谱学与光谱分析,2011,31(7):1991-1994.
[10]Song S X,Song L K.Analysis of double plate rotation depolarizer by Mueller matrix[J].Acta Optica Sinica,2009,29(7):1947-1950.宋师霞,宋连科.双光楔旋光退偏器的Mueller矩阵分析[J].光学学报,2009,29(7):1947-1950.
[12]Waluschka E,Wilson M,Quijada M,et al.ORCA′s depolarizer[J].Proceedings of SPIE,2011,8153:81530U.
[13]Liu Y,Fu S J,Li F T.The depolarization characteristic of quartz depolarizer in UV-VUV spectral region[J].Spectroscopy and Spectral Analysis,2004,24(3):372-375.刘颖,付绍军,李福田.石英消偏器紫外-真空紫外消偏特性研究[J].光谱学与光谱分析,2004,24(3):372-375.
[14]Burns W.Degree of polarization in the Lyot depolarizer[J].Journal of Lightwave Technology,1983,1(3):475-479.
[15]Chen F,Li M,Xu P M.The numerical analysis method of depolarizer for broadband imaging spectrometer[J].Proceedings of SPIE,2012,8532:85320W.
[15]McGuire J,Chipman R.Analysis of spatial pseudodepolarizers in imaging systems[J].Optical Engineering,1990,29(12):1478-1484.
[16]Mao J H,Wang Y M,Shi E T,et al.Design and test of depolarizer for space-borne imaging spectrometer[J].Acta Optica Sinica,2016,36(4):0423001.毛靖华,王咏梅,石恩涛,等.星载成像光谱仪退偏器的设计及测试[J].光学学报,2016,36(4):0423001.
[17]Zhao F C.The study on polarization correction of imaging spectrometer for space-borne ultraviolet atmospheric remote sensing[D].Changchun:Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,2012:62-74.赵发财.空间紫外大气遥感成像光谱仪偏振校正研究[D].长春:中国科学院长春光学精密机械与物理研究所,2012:62-74.
[18]Dobber M R,Dirksen R J,Levelt P F,et al.Ozone monitoring instrument in-flight performance and calibration[J].Proceedings of SPIE,2005,5962:59621L.
[19]Dennis G.Polarized light,revised and expanded[M].2nd edition.New York:Marcel Dekker,Inc.,2003:70.