论文标题
戒指光栅之王：它们用作冠状动脉的图像飞机过滤器
Lord of the Ring Gratings: Their use as image plane filters for coronagraphy
论文作者
论文摘要
Coronagraphy是一种有效的技术，用于识别和表征其母星的宜居区中绕行的太阳外行星。一个重要的冠状动脉家族是基于放置在光学系统中间图像平面上的振幅或相滤波器，将星光散布在所谓的Lyot停靠站，位于仪器的出口瞳孔平面上。本文探讨了用作图像平面冠状滤波器所用的循环振幅和相位光栅的潜力。它对振幅圆形光栅的最简单情况进行了理论分析，并通过交换其图像和瞳孔口罩引入了相对于经典的lyot coronagraph的反演范式。考虑了各种类型的圆形光栅，并在数值模拟的帮助下评估其性能。提出了最有希望的解决方案。我们得出的结论是，前提
Coronagraphy is an efficient technique for identifying and characterizing extra-solar planets orbiting in the habitable zone of their parent star. An important family of coronagraphs is based on amplitude or phase filters placed at an intermediate image plane of the optical system, spreading starlight outside of the so-called Lyot stop located at the exit pupil plane of the instrument. This article explores the potential of circular amplitude and phase gratings employed as image plane coronagraph filters. It presents a theoretical analysis of the simplest case of an amplitude circular grating and introduces an inversion paradigm with respect to classical Lyot coronagraph, by exchanging its image and pupil masks. Various types of circular gratings are considered and their performance is evaluated with the help of numerical simulations. The most promising solutions are presented. We conclude that high attenuation ratios of the starlight are feasible, provided that the system has been carefully optimized
