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Proceedings Paper

Design and test of a high-contrast imaging coronagraph based on two 50-step transmission filters
Author(s): Jiangpei Dou; Deqing Ren; Yongtian Zhu; Xi Zhang; Xue Wang
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Paper Abstract

We propose a high-contrast coronagraph based on the step transmission filters for the direct imaging of an Earth-like exoplanets. To demonstrate the performance of the coronagraph, two 50-step transmission filters were manufactured and several experiments have been performed. At present, the coronagraph can reach a high contrast around 10-7 at an inner angular distance of ~2λ/D in the visible wavelength. Such a coronagraph should be installed on an off-axis space telescope which will be promising for the direct imaging of an Earth-like exoplanet in the future.

Paper Details

Date Published: 5 December 2011
PDF: 9 pages
Proc. SPIE 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 81970F (5 December 2011); doi: 10.1117/12.916663
Show Author Affiliations
Jiangpei Dou, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology (China)
Deqing Ren, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology (China)
California State Univ., Northridge (United States)
Yongtian Zhu, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology (China)
Xi Zhang, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology (China)
Graduate Univ. of the Chinese Academy of Sciences (China)
Xue Wang, Nanjing Institute of Astronomical Optics & Technology (China)
Key Lab. of Astronomical Optics & Technology (China)
Graduate Univ. of the Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 8197:
2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Yunlong Sheng; Han-Ping Shieh; Kimio Tatsuno, Editor(s)

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