Optical design of the Lyman alpha coronagraph for the LYOT microsatellite
Optical design of the Lyman alpha coronagraph for the LYOT microsatellite
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DOI：
10.1117/12.506390
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发表时间：
2004-02
期刊：
影响因子：
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通讯作者：
S. Vives;P. Lamy;J. Vial
中科院分区：
文献类型：
--
作者：
S. Vives;P. Lamy;J. Vial
LYOT（LYman 轨道望远镜）太阳任务（建议用于 CNES 微型卫星）由圆盘成像仪和日冕仪组成，两者均在 Lyman-α（121.6 nm）工作。日冕仪为内隐式全反射型，视场为 1.2 R 至 2.5 R，高空间分辨率（2 像素）达 5 角秒。光学设计的驱动因素是使用超抛光球面镜以尽量减少进入仪器的散射光。 LYOT 任务将在两年内以高节奏（1 张图像/5 分钟）观测莱曼-α 日冕。
The LYOT (LYman Orbiting Telescope) solar mission (proposed for a CNES micro-satellite) is composed of a disk imager and a coronagraph, both working at Lyman-α (121.6 nm). The coronagraph is internally occulted and all-reflective with a field-of-view of 1.2 R up to 2.5 R and high spatial resolution (2 pixels) amounts to 5 arcsec. The optical design is driven by the requirement to use a superpolished spherical mirror to minimize the scattered light into the instrument. The LYOT mission will observe the Lyman-α corona at high cadence (1 image/5 minutes) over a period of two years.