多波段偏振成像仪的实验室定标研究
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摘要
介绍一种多波段偏振成像仪的集成设计及实验室偏振定标方案。通过可调偏振度光源验证仪器偏振定标精度,在10°视场内,当光源偏振度低于0.6时,仪器490 nm通道偏振度测量相对误差优于1.6%,670nm通道偏振度测量相对误差优于1.7%。设计了多波段偏振成像仪的系统软件,详细介绍了各个功能模块及自动化观测算法,通过敦煌辐射校正场外场试验,验证了仪器野外运行的稳定性以及系统软件设计的合理性与实用性.
The integrated design and laboratory calibration method of a multi-band polarization imager were presented.The polarization calibration accuracy was validated by a polarized light source whose degrees of polarization(DOP)is adjustable.The results showed that the relative DOP errors of 490 nm and 670 nm band are less than 1.6%and 1.7%,respectively,when the DOP of the polarized light source is less than 0.6.The software system of the multi-band polarization imager was designed as well,and the function modules and automatic observation algorithm of the software were described in detail.Finally,the field operation stability of the instrument as well as the function and practicability of software design were verified by its field depolyment in Dunhuang radiation calibration site,Gansu,China.
The integrated design and laboratory calibration method of a multi-band polarization imager were presented.The polarization calibration accuracy was validated by a polarized light source whose degrees of polarization(DOP)is adjustable.The results showed that the relative DOP errors of 490 nm and 670 nm band are less than 1.6%and 1.7%,respectively,when the DOP of the polarized light source is less than 0.6.The software system of the multi-band polarization imager was designed as well,and the function modules and automatic observation algorithm of the software were described in detail.Finally,the field operation stability of the instrument as well as the function and practicability of software design were verified by its field depolyment in Dunhuang radiation calibration site,Gansu,China.
引文
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[4]He H H,Zeng N,Liao R,et al.Progresses of Polarization Imaging Techniques and Their Applications in Cancer Detections[J].Progress in Biochemistry&Biophysics,2015,52(5):419-433(in Chinese).何宏辉,曾楠,廖然,等.偏振光成像技术用于肿瘤病变检测的研究进展[J].生物化学与生物物理进展,201552(5):419-433.
[5]Wang G H,Guo Z D,Zhu H,et al.Capability Analysis of Polarized Light Celestial Positioning[J].Acta Photonica Sinica,2012,41(1):11-14(in Chinese).王光辉,郭正东,朱海,等.偏振光天文导航定位能力分析[J].光子学报,2012,41(1):11-14.
[6]Wang G C,Wang J L,Zhang Z D,et al.Influence on Space Target Polarization Imaging Detection Resulting'from Atmospheric Turbulence[J].Acta Photonica Sinica,2016,45(4):131-137(in Chinese).王国聪,王建立,张振铎,等.大气湍流对空间目标偏振成像探测的影响[J].光子学报,2016,45(4):131-137.
[7]Zhang H Y,Li Y,Yan C X,et al.Calibration of polarized effect for time-divided polarization spectral measurement system[J].Optics&Precision Engineering,2017,25(2):325-333(in Chinese).张海洋,李颐,颜昌翔,等.分时偏振光谱测量系统的起偏效应校正[J].光学精密工程,2017,25(2):325-333.
[8]Luo J,Liu D,Xu P T,et al.High-Precision Polarizing Beam Splitting System Based on Polarizing Beam Splitter[J].Chinese Journal of Lasers,2016,43(12):239-245(in Chinese).罗敬,刘东,徐沛拓,等.基于偏振分光棱镜的高精度偏振分光系统[J].中国激光,2016,43(12):239-245.
[9]Cheng M X,He Z J,Huang Z H.Polarimeter System of Stokes Parameters Based on Division-of-Amplitude[J].Opto-Electronic Engineering,2008,35(5):93-97(in Chinese).程敏熙,何振江,黄佐华.分振幅法偏振光斯托克斯参量测量系统[J].光电工程,2008,35(5):93-97.
[10]Huang W J.Research on Pre-Processing Methods of Dispersive Simultaneous Imaging Polarization Camera[D].Hefei:Master's thesis of University of Science and Technology of China,2016(in Chinese).黄文娟.三分束同时成像偏振相机预处理方法研究[D].合肥:中国科学技术大学硕士论文,2016.
[11]Lowe D G.Distinctive Image Features from Scale-Invariant Keypoints[J].International Journal of Computer Vision,2004,60(2):91-110.
[12]Li J J,Sun X B,Kang Q,et al.Polarization detection accuracy analysis of spectropolarimeter[J].Infrared and Laser Engineering,2018,47(1):230021-230027(in Chinese).李金金,孙晓兵,康晴,等·偏振光谱仪偏振探测精度分析[J].红外与激光工程,2018,47(1):230021-230027.