Space Research Institute of RAS, Profsoyuznaya Ulitsa 84/32, Moscow 117997, Russia.
Opt Lett. 2011 Jun 1;36(11):1972-4. doi: 10.1364/OL.36.001972.
To suppress starlight for direct exoplanet observation, we propose a common-path achromatic rotational-shearing coronagraph (CP-ARC), which is an interferocoronagraph with an angular-adjustable field rotator. The CP-ARC aims to maintain unwanted detection of stellar light, which can be suppressed incompletely by interference because of the finite diameter of the star. Compared to the previous interferocoronagraph, which had a nonadjustable 180° field rotation, the proposed CP-ARC can improve the coronagraphic contrast by several orders if the CP-ARC is combined with medium or large telescopes where the companion-star separation is optically resolved by more than a few Airy radii. The CP-ARC is made robust against mechanical disturbances due to the common-path interferometer principle.
为了抑制星光以进行直接系外行星观测，我们提出了一种共光路消色差旋转剪切日冕仪（CP-ARC），它是一种具有角度可调场旋转器的干涉日冕仪。CP-ARC 的目的是保持对恒星光的不希望的检测，由于恒星的有限直径，干涉可能无法完全抑制恒星光的检测。与之前的不可调 180°场旋转干涉日冕仪相比，如果 CP-ARC 与中或大望远镜结合使用，其中伴星分离在光分辨率上超过几个艾里半径，则 CP-ARC 可以将日冕对比提高几个数量级。由于共光路干涉仪原理，CP-ARC 具有很强的抗机械干扰能力。
