The achromatic phase knife coronagraph

被引:61
作者
Abe, L [1 ]
Vakili, F
Boccaletti, A
机构
[1] Observ Cote Azur, Dept Fresnel, CNRS, UMR 6528, F-06460 St Vallier De Thiey, France
[2] Coll France, F-75005 Paris, France
关键词
techniques : interferometric; stars : binaries : close; stars : planetary systems;
D O I
10.1051/0004-6361:20010619
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the concept of a nulling coronagraph which theoretically attains the brightness ratio of 10(8) suitable to directly detect exo-Earths in the vicinity of their parent stars. The concept is derived from the classical Foucault's optics test and Zernike's self-destructive phase contrast principle. We propose an achromatic set-up which should dramatically improve its wide band efficiency. The whole system is simulated against a numerical model which validates a formal analytical approach. The coronagraph is then compared to other concepts and its advantages and shortcomings are outlined, suggesting future laboratory developments and tests on the sky.
引用
收藏
页码:1161 / 1168
页数:8
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