A spectropolarimetric focal station for the ESO E-ELT
A spectropolarimetric focal station for the ESO E-ELT
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ESO E-ELT 的分光偏振焦点站
DOI：
10.1117/12.926009
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
U. Laux
中科院分区：
文献类型：
--
作者：
K. Strassmeier;I. DiVarano;I. Ilyin;M. Woche;U. Laux
本文提出了ESO欧洲超大望远镜（E-ELT）分光偏振焦距站的概念设计。它使用中间的f/4.4焦距，这是望远镜唯一的对称焦距。双通道全Stokesvector偏振计通过两对光纤同时为两个光谱仪提供波长范围为380-1600nm的轴向光。有了这样的偏振光谱测量能力和适当的光学和近红外波长光谱仪，E-ELT将能够提供入射波前的完整参数空间。由于偏振光准直器的入口位置在轴上，入口孔径仅为1.3弧秒，因此预期的中间望远镜焦距成像质量差与此没有直接关系。
We present a conceptual design for a spectropolarimetric focal station for ESO's European Extremely Large Telescope (E-ELT). It uses the intermediate f/4.4 focus, the only symmetric focus of the telescope. A dual channel, full Stokesvector polarimeter provides on-axis light for the wavelength range 380-1600nm to up to two spectrographs simultaneously via two pairs of fibers. With such spectropolarimetric capability and a proper spectrograph for the optical and the near infrared wavelengths, the E-ELT would be able to provide the full parameter space of an incoming wavefront. Because of the on-axis entrance location of the polarimeter collimator and an entrance aperture of just 1.3 arcsec, the expected poor image quality of the intermediate telescope focus is not directly relevant.