基于Stokes矢量测量的LCVR标定方法研究
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摘要
液晶相位可变延迟器(LCVR)是一种利用液晶电控双折射效应进行工作的波片,通过改变电场来改变入射光的相位,因其相位延迟与电压、波长、温度等因素有关,使用前需要进行严格的标定。针对LCVR的标定,提出了一种基于Stokes矢量测量的LCVR标定方法,建立了系统Stokes矢量与LCVR相位延迟量之间的函数关系,通过偏振态测量仪测量待测系统出射光的Stokes矢量,进而求解出LCVR的相位延迟量。通过与光强法进行对比分析,验证了Stokes矢量法的正确性,并且,较之光强法测量更加简便,系统不再需要检偏器,避免了透光轴校准和光强值测量带来的误差;最后分析了电压、入射光的偏振角度、入射光波长,以及温度等对LCVR相位延迟量的影响.
Liquid crystal variable retarders(LCVR), a kind of wave plate using liquid crystal birefringence effect,can modulate the incident light phase by changing the electric field. It needs to be calibrated accurately advancely because of its phase delay related to the voltage, wavelength, temperature and other factors. The calibration method of LCVR based on Stokes vector measurement was proposed, and the functional relationship between the system stokes vector and the LCVR phase delay was established. The Stokes vector of light was measured by polarization measurement instrument, then the phase delay of LCVR was calculated. The proposed Stokes vector method was compared with the two traditional light intensity calibration methods, and the correctness of the new method was verified. Stokes vector method is more simple and convenient, the system no longer needs analyzer, and avoided the error from the transmission axis calibration and light intensity measurement. Finally, the influences of voltage, angle of polarization of incident light, incident wavelength and temperature on the phase delay of LCVR were analysed.
Liquid crystal variable retarders(LCVR), a kind of wave plate using liquid crystal birefringence effect,can modulate the incident light phase by changing the electric field. It needs to be calibrated accurately advancely because of its phase delay related to the voltage, wavelength, temperature and other factors. The calibration method of LCVR based on Stokes vector measurement was proposed, and the functional relationship between the system stokes vector and the LCVR phase delay was established. The Stokes vector of light was measured by polarization measurement instrument, then the phase delay of LCVR was calculated. The proposed Stokes vector method was compared with the two traditional light intensity calibration methods, and the correctness of the new method was verified. Stokes vector method is more simple and convenient, the system no longer needs analyzer, and avoided the error from the transmission axis calibration and light intensity measurement. Finally, the influences of voltage, angle of polarization of incident light, incident wavelength and temperature on the phase delay of LCVR were analysed.
引文
[1] Lopez-Téllez J M, Bruce N C, Rodriguez-Herrera O G. Characterization of optical polarization properties for liquid crystal-based retarders[J]. Applied Optics, 2016, 55(22):6025-6033.
[2] Zhang Zhiyong, Deng Yuanyong, Wang Dongguang, et al. Comparison and analysis of several methods for measuring waveplate retardation[J]. Optics and Precsion Engineering(光学精密工程),2007, 15(11):1678-1685(in Chinese).
[3] Bickel W S,Bailey W M. Stokes vectors,Mueller matrices,and polarized scattered light[J]. American Journal of Physics, 1985, 53(5):468-478.
[4] Montes I, Bruce N C, Lópeztellez J M. Polarization characterization of liquid-crystal variable retarders[C]. SPIE Optical Engineering Applications, 2016:996014.
[5] Wang Ning, Li Guohua, Yun Mao jin. Voltage-dependent birefringence measurements of liquid crystals[J]. Chinese Journal of Lasers(中国激光),2002, 29(12):1064-1066(in Chinese).
[6] Li Kewu, Wang Zhibin, Zhang Rui, et al. Study of birefringence dispersion based on liquid crystal variable retarder[J]. Chinese Journal of Lasers(中国激光),2015, 42(1):224-230(in Chinese).
[7] Jiang Jijun, Shen Zhixue, Zhang Dayong, et al. Polarization-independent phase-only variable retarder[J]. Optics Electronic Engineering(光电工程),2010, 37(12):131-135(in Chinese).
[8] Huo Shuchun, Hu Chunguang, Shen Wanfu, et al. Photoelectric characterization of liquid crystal variable retarder using single polarizer[J]. Journal of Infrared and Millimeter Waves(红外与毫米波学报),2016,35(1):68-71(in Chinese).
[9] Yan Zengcheng. Research on Laser Polarization Modulation Technology based on LCVR(基于LCVR的激光偏振态调制技术研究)[D]. Changchun:Master Thesis of Changchun University of Science and Technology,2016(in Chinese).
[10] Wang Yaoli. The Research on Spectropolarimetric Imaging System and maging Quality based on AOTF(基于AOTF的光谱偏振成像系统及其成像质量研究)[D]. Taiyuan:Doctorial Dissertation of North University of China,2016(in Chinese).
[11] Wu S T, Efron U, Hess L V D. Birefringence measurements of liquid crystals[J]. Applied Optics, 1984, 23(21):3911-3915.
[12] Lópeztéllez J M, Bruce N C, Delgadoaguill6n J, et al. Experimental method to characterize the retardance function of optical variable retarders[J]. American Journal of Physics, 2015, 83(2):143-149.
[13] Lópeztéllez J M, Bruce N C. Mueller-matrix polarimeter using analysis of the nonlinear voltage-retardance relationship for liquid-crystal variable retarders[J]. Applied Optics, 2014, 53(24):5359-66.
[14] Terrier P, Charbois J M, Devlaminck V. Fast-axis orientation dependence on driving. voltage for a Stokes polarimeter based on concrete liquid-crystal variable retarders[J]. Applied Optics, 2010, 49(22):4278-83.
[15] Wang Qichao,Shi Jiaming, Zhao Dapeng,et al. Design of hyperspectral polarization image system based on acousto-optic tunable filter[J]. Opto-Electronic Engineering(光电工程),2013, 40(1):66-71(in Chinese).
[16] Yang Fanchao, Li Yong, Hu Bingliang, et al. Design of hyperspectral polarimetic imaging system based on LCTF and LCVR[J]. Spectroscopy and Spectral Analysis(光谱学与光谱分析),2017, 37(8):2610-2614(in Chinese).
[2] Zhang Zhiyong, Deng Yuanyong, Wang Dongguang, et al. Comparison and analysis of several methods for measuring waveplate retardation[J]. Optics and Precsion Engineering(光学精密工程),2007, 15(11):1678-1685(in Chinese).
[3] Bickel W S,Bailey W M. Stokes vectors,Mueller matrices,and polarized scattered light[J]. American Journal of Physics, 1985, 53(5):468-478.
[4] Montes I, Bruce N C, Lópeztellez J M. Polarization characterization of liquid-crystal variable retarders[C]. SPIE Optical Engineering Applications, 2016:996014.
[5] Wang Ning, Li Guohua, Yun Mao jin. Voltage-dependent birefringence measurements of liquid crystals[J]. Chinese Journal of Lasers(中国激光),2002, 29(12):1064-1066(in Chinese).
[6] Li Kewu, Wang Zhibin, Zhang Rui, et al. Study of birefringence dispersion based on liquid crystal variable retarder[J]. Chinese Journal of Lasers(中国激光),2015, 42(1):224-230(in Chinese).
[7] Jiang Jijun, Shen Zhixue, Zhang Dayong, et al. Polarization-independent phase-only variable retarder[J]. Optics Electronic Engineering(光电工程),2010, 37(12):131-135(in Chinese).
[8] Huo Shuchun, Hu Chunguang, Shen Wanfu, et al. Photoelectric characterization of liquid crystal variable retarder using single polarizer[J]. Journal of Infrared and Millimeter Waves(红外与毫米波学报),2016,35(1):68-71(in Chinese).
[9] Yan Zengcheng. Research on Laser Polarization Modulation Technology based on LCVR(基于LCVR的激光偏振态调制技术研究)[D]. Changchun:Master Thesis of Changchun University of Science and Technology,2016(in Chinese).
[10] Wang Yaoli. The Research on Spectropolarimetric Imaging System and maging Quality based on AOTF(基于AOTF的光谱偏振成像系统及其成像质量研究)[D]. Taiyuan:Doctorial Dissertation of North University of China,2016(in Chinese).
[11] Wu S T, Efron U, Hess L V D. Birefringence measurements of liquid crystals[J]. Applied Optics, 1984, 23(21):3911-3915.
[12] Lópeztéllez J M, Bruce N C, Delgadoaguill6n J, et al. Experimental method to characterize the retardance function of optical variable retarders[J]. American Journal of Physics, 2015, 83(2):143-149.
[13] Lópeztéllez J M, Bruce N C. Mueller-matrix polarimeter using analysis of the nonlinear voltage-retardance relationship for liquid-crystal variable retarders[J]. Applied Optics, 2014, 53(24):5359-66.
[14] Terrier P, Charbois J M, Devlaminck V. Fast-axis orientation dependence on driving. voltage for a Stokes polarimeter based on concrete liquid-crystal variable retarders[J]. Applied Optics, 2010, 49(22):4278-83.
[15] Wang Qichao,Shi Jiaming, Zhao Dapeng,et al. Design of hyperspectral polarization image system based on acousto-optic tunable filter[J]. Opto-Electronic Engineering(光电工程),2013, 40(1):66-71(in Chinese).
[16] Yang Fanchao, Li Yong, Hu Bingliang, et al. Design of hyperspectral polarimetic imaging system based on LCTF and LCVR[J]. Spectroscopy and Spectral Analysis(光谱学与光谱分析),2017, 37(8):2610-2614(in Chinese).