NIAOT OpenIR  > 中国科学院南京天文光学技术研究所  > 期刊论文
A high-contrast imaging polarimeter with a stepped-transmission filter based coronagraph
Cheng-Chao Liu1,2,4; De-Qing Ren1,2,3; Yong-Tian Zhu1,2; Jiang-Pei Dou1,2; Jing Guo1,2
2016-05
Source PublicationResearch in Astronomy and Astrophysics
Volume16Issue:5Pages:73-1-6
Abstract
The light reflected from planets is polarized mainly due to Rayleigh scattering, but starlight
is normally unpolarized. Thus it provides an approach to enhance the imaging contrast by inducing the imaging polarimetry technique.

In this paper, we propose a high-contrast imaging polarimeter that is optimized for the direct imaging of exoplanets, combined with our recently developed stepped-transmission filter based coronagraph.

Here we present the design and calibration method of the polarimetry system and the associated test of its high-contrast performance. In this polarimetry system, two liquid crystal variable retarders (LCVRs) act as a polarization modulator, which can extract the polarized signal.

We show that our polarimeter can achieve a measurement accuracy of about 0.2% at a visible wavelength (632.8 nm) with linearly polarized light. Finally, the whole system demonstrates that a contrast of 10-9 at 5/D is achievable, which can be used for direct imaging of Jupiter-like planets with a space telescope.
KeywordPolarimeter Coronagraph Polarimetric Laboratory
Subject Area天文技术与方法
Language英语
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1351
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.中国科学院天文光学重点实验室
3.美国加州州立大学物理天文系
4.中国科学院大学
Recommended Citation
GB/T 7714
Cheng-Chao Liu,De-Qing Ren,Yong-Tian Zhu,et al. A high-contrast imaging polarimeter with a stepped-transmission filter based coronagraph[J]. Research in Astronomy and Astrophysics,2016,16(5):73-1-6.
APA Cheng-Chao Liu,De-Qing Ren,Yong-Tian Zhu,Jiang-Pei Dou,&Jing Guo.(2016).A high-contrast imaging polarimeter with a stepped-transmission filter based coronagraph.Research in Astronomy and Astrophysics,16(5),73-1-6.
MLA Cheng-Chao Liu,et al."A high-contrast imaging polarimeter with a stepped-transmission filter based coronagraph".Research in Astronomy and Astrophysics 16.5(2016):73-1-6.
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