PIAA coronagraph for Origins Space telescope (OST) mid-infrared imager, spectrometer, coronagraph (MISC) instrument
PIAA coronagraph for Origins Space telescope (OST) mid-infrared imager, spectrometer, coronagraph (MISC) instrument
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PIAA 日冕仪，适用于 Origins 太空望远镜 (OST) 中红外成像仪、光谱仪、日冕仪 (MISC) 仪器
DOI：
10.1117/12.2313066
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
K.
中科院分区：
文献类型：
--
作者：
Fujishiro;N.、Sakon;I.、Enya;K.、Guyon;O.、Nishikawa;J.、Murakami;N.、Kotani;T.、 Tamura;M.,、Takahashi;A.、Roellig;T. L.、Ennico-Smith;K.
为起源空间望远镜（OST）使命概念1研究的中红外成像仪、分光仪日冕仪（MISC）仪器设计用于在5至38微米的中红外波长范围内进行观测。在OST使命概念1研究中，MISC由三个独立的光学模块组成，提供成像、光谱学和日冕测量能力。MISC日冕仪模块（MISC COR）采用相位诱导振幅切趾（PIAA）日冕仪（Guyon等人，2014年），其中通过反射镜上的反射修改光瞳切趾，并通过焦平面掩模和Lyot掩模阻挡中心星光。MISC COR的性能目标是在距离中心星星0.5”处实现10- 7的对比度，覆盖波长为6-38微米，使用2个光学通道。MISC COR将是一个强大的工具，带来了系外行星科学的革命性进展。本文详细介绍了它的光学和光机设计，并讨论了焦平面掩模和Lyot掩模的各种组合的预期性能。
The Mid-infrared Imager, Spectrometer Coronagraph (MISC) instrument studied for the Origins Space Telescope (OST) Mission Concept 1 is designed to observe at mid-infrared (MIR) wavelengths ranging from 5 to 38 microns for OST. In the OST Mission Concept 1 study, MISC consists of three separate optical modules providing imaging, spectroscopy, and coronagraph capabilities. The MISC Coronagraph module (MISC COR) employs Phase-Induced Amplitude Apodization (PIAA) coronagraph (Guyon et al. 2014) in which pupil apodization is modified by reflection on mirrors and central starlight is blocked by focal plane mask and Lyot mask. The performance target of MISC COR is to achieve 10-7contrast at 0.5” from the central star with covering wavelength of 6-38 microns using 2 optical channels. MISC COR will be a powerful tool to bring a revolutionary progress in exoplanet sciences. In this paper, we present detailed design of its optics and optomechanics, and discuss expected performances for a variety of combination of focal plane mask and Lyot mask.