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A high-contrast coronagraph for direct imaging of Earth-like exoplanets: design and test
Cheng-Chao Liu1,2,4; De-Qing Ren1,2,3; Jian-Pei Dou1,2; Yong-Tian Zhu1,2; Xi Zhang1,2; Gang Zhao1,2; Zhen Wu1,2; Rui Chen1,2
2015-03
Source PublicationResearch in Astronomy and Astrophysics
Volume15Issue:3Pages:453–460
Abstract
A high-contrast coronagraph for direct imaging of an Earth-like exoplanetat the visible band needs a contrast of 10E-10 at a small angular separation of 4λ/D or less. Here we report our recent laboratory experiment that approaches these limits.

Our test of a high-contrast imaging coronagraph is based on our step-transmissionapodized filter. To achieve this goal, we use a liquid crystal array as a phase correctorto create a dark hole based on our dedicated algorithm. We have suppressed thediffraction and speckle noise near the point image of a star to a level of 1.68E-9 at 4λ/D, which can be used for direct imaging of Jupiter-like exoplanets. This demonstrates that a telescope incorporating a high-contrast coronagraph in space has the potential to detect and characterize Earth-like planets.
KeywordCoronagraph Liquid Crystal Array Apodization Laboratory
Subject Area天文技术与方法
DOI10.1088/1674–4527/15/3/012
Language英语
Funding OrganizationNational Natural Science Foundation of China
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Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1173
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.Nanjing Institute of Astronomical Optics & Technology
2.Key Laboratory of Astronomical Optics & Technology,Chinese Academy of Sciences
3.Physics & Astronomy Department, California State University Northridge
4.University of Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Cheng-Chao Liu,De-Qing Ren,Jian-Pei Dou,et al. A high-contrast coronagraph for direct imaging of Earth-like exoplanets: design and test[J]. Research in Astronomy and Astrophysics,2015,15(3):453–460.
APA Cheng-Chao Liu.,De-Qing Ren.,Jian-Pei Dou.,Yong-Tian Zhu.,Xi Zhang.,...&Rui Chen.(2015).A high-contrast coronagraph for direct imaging of Earth-like exoplanets: design and test.Research in Astronomy and Astrophysics,15(3),453–460.
MLA Cheng-Chao Liu,et al."A high-contrast coronagraph for direct imaging of Earth-like exoplanets: design and test".Research in Astronomy and Astrophysics 15.3(2015):453–460.
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