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In order to achieve all Stokes parameters of spectral image with high spectral resolution, high spatial resolution, high polarization accuracy, high signal-to-noise ratio and good stability, taking into account the orthogonal characteristic of ±1 order diffraction light which diffracts from a acousto-optic tunable filter (AOTF), a new technique of full polarization hyperspectral imaging is presented. It uses one AOTF to diffract the incident light, one liquid crystal variable retarder (LCVR) to modulate the light retardation, and two CCDs to image the ±1 order diffraction light, respectively. According to the Muller matrixes of all optical elements in the system, the basic working principle of the new technique is that LCVR sequentially provides the retardation 2π, 1.5π, π and 0.5π for each spectral channel, so the CCD obtains corresponding images. After analyzing these images, the all Stokes parameters are obtained; the precision of this system for polarization imaging is determined mainly by polarization modulation device LCVR. Considering the azimuth of LCVR fast axis and retardation precision at the same time, it is unveiled that LCVR has no effect on the accuracy of the first Stokes parameter, and the relative errors of other latter 3 Stokes parameters are less than 0.064%, 0.31% and 3.97%; then, our prototype system is used to do the outdoor experiments in a summer sunny morning, images data for 26 spectral channels with spectral bandwidth of 10 nm, which are from 450 nm to 700 nm, are acquired, the imaging quality is very fine. Firstly, LCVR are not assembled in our prototype system, and AOTF works in the sweeping frequency mode. The spectrum from each CCD proves that the diffraction efficiency of AOTF ± 1 order diffraction light is not completely the same, and the difference must be considered in polarized image processing. Then another experiment is done after LCVR has been assembled. The image data of the incident light of 600 nm are taken for example to discuss its all Stokes parameters in detail. The results show that the principle of the new technique is correct and the new scheme is feasible. This study provides a new theory and implementation scheme for the polarization spectral imaging technology.
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Keywords:
- spectrum /
- polarization /
- Stokes parameters
[1] Li J, Zhu J P, Qi C, Zheng C L, Gao B, Zhang Y Y, Hou X 2013 Acta Phys. Sin. 62 044206 (in Chinese) [李杰, 朱京平, 齐春, 郑传林, 高博, 张云尧, 侯洵 2013 物理学报 62 044206]
[2] Mu T K, Zhang C M, Li Q W, Wei Y T, Chen Q Y, Jia C L 2014 Acta Phys. Sin. 63 110704 (in Chinese) [穆廷魁, 张淳民, 李祺伟, 魏宇童, 陈清颖, 贾辰凌 2014 物理学报 63 110704]
[3] Chen Y H, Wang Z B, Wang Z B, Zhang R, Wang Y C, Wang G J 2013 Acta Phys. Sin. 62 060702 (in Chinese) [陈友华, 王召巴, 王志斌, 张瑞, 王艳超, 王冠军 2013 物理学报 62 060702]
[4] Zhang C M, Ren W Y, Mu T K 2010 Chin. Phys. B 19 024202
[5] Wu J F, Zhang C M 2010 Chin. Phys. B 19 034201
[6] Hasekamp O P, Landgraf J 2007 Appl. Opt. 46 3332
[7] Scharmer G B, Narayan G, Hillberg T 2008 Astrophys. J. 689 169
[8] Nathan J P, Andrew R D, Michael J, Joseph A 2011 Opt. Express 19 18602
[9] Zhao Y Q, Pan Q, Cheng Y M 2011 Imaging Spectro-polarimetric Remote Sensing and Application (Beijing: National Defense Industry Press) (in Chinese) [赵永强, 潘泉, 程咏梅 2011 成像偏振光谱遥感及应用 (北京:国防工业出版社)]
[10] Zhang C M 2010 Interference Imaging Spectroscopy (Beijing: Science Press) pp17-32 (in Chinese) [张淳民 2010 干涉成像光谱技术 (北京:科学出版社)第17-32页]
[11] Zhao H J, Zhou P W, Zhang Y, Cheng X, Xing H 2009 Infrared and Laser Engineering 38 189 (in Chinese) [赵慧洁, 周鹏威, 张颖, 程宣, 邢辉 2009 红外与激光工程 38 189]
[12] Li K W, Wang Z B, Zhang R, Yu H 2015 Chin. J. Laser 42 0108001-1 (in Chinese) [李克武, 王志斌, 张瑞, 于慧 2015 中国激光 42 0108001-1]
[13] Neelam G, Rachid D, Steve C 2002 Opt. Eng. 41 1033
[14] Zhang Y, Zhao H J, Cheng X, Xiong S J 2011 Spectrosc. Spect. Anal. 31 1375 (in Chinese) [张颖, 赵慧洁, 程宣, 熊胜军 2011 光谱学与光谱分析 31 1375]
[15] Neelam G 2014 Proc. SPIE 9099 90990N-1
[16] Yu K X, Ding X H, Pang Z G 2011 Acousto Optic Principle and Acousto Optic Device (Beijing: Science Press) p257 (in Chinese) [俞宽新, 丁晓红, 庞兆广 2011 声光原理与声光器件 (北京:科学出版社)第257页]
[17] Liao Y B 2003 Polarization Optics (Beijing: Science Press) p49 (in Chinese) [廖延彪 2003 偏振光学 (北京:科学出版社)第49页]
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[1] Li J, Zhu J P, Qi C, Zheng C L, Gao B, Zhang Y Y, Hou X 2013 Acta Phys. Sin. 62 044206 (in Chinese) [李杰, 朱京平, 齐春, 郑传林, 高博, 张云尧, 侯洵 2013 物理学报 62 044206]
[2] Mu T K, Zhang C M, Li Q W, Wei Y T, Chen Q Y, Jia C L 2014 Acta Phys. Sin. 63 110704 (in Chinese) [穆廷魁, 张淳民, 李祺伟, 魏宇童, 陈清颖, 贾辰凌 2014 物理学报 63 110704]
[3] Chen Y H, Wang Z B, Wang Z B, Zhang R, Wang Y C, Wang G J 2013 Acta Phys. Sin. 62 060702 (in Chinese) [陈友华, 王召巴, 王志斌, 张瑞, 王艳超, 王冠军 2013 物理学报 62 060702]
[4] Zhang C M, Ren W Y, Mu T K 2010 Chin. Phys. B 19 024202
[5] Wu J F, Zhang C M 2010 Chin. Phys. B 19 034201
[6] Hasekamp O P, Landgraf J 2007 Appl. Opt. 46 3332
[7] Scharmer G B, Narayan G, Hillberg T 2008 Astrophys. J. 689 169
[8] Nathan J P, Andrew R D, Michael J, Joseph A 2011 Opt. Express 19 18602
[9] Zhao Y Q, Pan Q, Cheng Y M 2011 Imaging Spectro-polarimetric Remote Sensing and Application (Beijing: National Defense Industry Press) (in Chinese) [赵永强, 潘泉, 程咏梅 2011 成像偏振光谱遥感及应用 (北京:国防工业出版社)]
[10] Zhang C M 2010 Interference Imaging Spectroscopy (Beijing: Science Press) pp17-32 (in Chinese) [张淳民 2010 干涉成像光谱技术 (北京:科学出版社)第17-32页]
[11] Zhao H J, Zhou P W, Zhang Y, Cheng X, Xing H 2009 Infrared and Laser Engineering 38 189 (in Chinese) [赵慧洁, 周鹏威, 张颖, 程宣, 邢辉 2009 红外与激光工程 38 189]
[12] Li K W, Wang Z B, Zhang R, Yu H 2015 Chin. J. Laser 42 0108001-1 (in Chinese) [李克武, 王志斌, 张瑞, 于慧 2015 中国激光 42 0108001-1]
[13] Neelam G, Rachid D, Steve C 2002 Opt. Eng. 41 1033
[14] Zhang Y, Zhao H J, Cheng X, Xiong S J 2011 Spectrosc. Spect. Anal. 31 1375 (in Chinese) [张颖, 赵慧洁, 程宣, 熊胜军 2011 光谱学与光谱分析 31 1375]
[15] Neelam G 2014 Proc. SPIE 9099 90990N-1
[16] Yu K X, Ding X H, Pang Z G 2011 Acousto Optic Principle and Acousto Optic Device (Beijing: Science Press) p257 (in Chinese) [俞宽新, 丁晓红, 庞兆广 2011 声光原理与声光器件 (北京:科学出版社)第257页]
[17] Liao Y B 2003 Polarization Optics (Beijing: Science Press) p49 (in Chinese) [廖延彪 2003 偏振光学 (北京:科学出版社)第49页]
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