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Design and calibration of a high-sensitivity and high-accuracy polarimeter based on liquid crystal variable retarders
Jing Guo1,2; De-Qing Ren1,2,3; Cheng-Chao Liu1,2; Yong-Tian Zhu1,2; Jiang-Pei Dou1,2; Xi Zhang1,2
2017-01
Source PublicationResearch in Astronomy and Astrophysics
Volume17Issue:1Pages:8-18
Abstract
Polarimetry plays an important role in the measurement of solar magnetic fields。We developed a high-sensitivity and high-accuracy polarimeter (HHP) based on nematic liquid crystal variable retarders (LCVRs), which has a compact setup and no mechanical moving parts。The system design and calibration methods are discussed in detail. The azimuth error of the transmission axis of the polarizer as well as the fast axes of the two LCVRs and the quarter-wave plate were determined using dedicated procedures。Linearly and circularly polarized light were employed to evaluate the performance of the HHP。The experimental results indicate that a polarimetric sensitivity of better than 5.7 × 10-3 can be achieved by using a single short-exposure image, while an accuracy on the order of 10-5 can be reached
by using a large number of short-exposure images。This makes the HHP a high-performance system that can be used with a ground-based solar telescope for high-precision solar magnetic field investigations。
KeywordPolarimeters Laboratory Magnetic Fields Polarimetric
Subject Area天文技术与方法
Language英语
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1439
Collection中国科学院南京天文光学技术研究所_期刊论文
天文光谱和高分辨成像技术研究室_期刊论文
Affiliation1.南京天文光学技术研究所
2.中科院天文光学技术重点实验室
3.加利福尼亚州立大学北岭分校物理与天文学院
Recommended Citation
GB/T 7714
Jing Guo,De-Qing Ren,Cheng-Chao Liu,et al. Design and calibration of a high-sensitivity and high-accuracy polarimeter based on liquid crystal variable retarders[J]. Research in Astronomy and Astrophysics,2017,17(1):8-18.
APA Jing Guo,De-Qing Ren,Cheng-Chao Liu,Yong-Tian Zhu,Jiang-Pei Dou,&Xi Zhang.(2017).Design and calibration of a high-sensitivity and high-accuracy polarimeter based on liquid crystal variable retarders.Research in Astronomy and Astrophysics,17(1),8-18.
MLA Jing Guo,et al."Design and calibration of a high-sensitivity and high-accuracy polarimeter based on liquid crystal variable retarders".Research in Astronomy and Astrophysics 17.1(2017):8-18.
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