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首页> 外文期刊>Experimental astronomy >Apodized Lyot coronagraph for SPHERE/VLT: II. Laboratory tests and performance
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Apodized Lyot coronagraph for SPHERE/VLT: II. Laboratory tests and performance

机译：用于SPHERE / VLT的Apodized Lyot冠冕仪：II。实验室测试和性能

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摘要

SPHERE (which stands for Spectro-Polarimetric High-contrast Exoplanet REsearch) is a second-generation Very Large Telescope (VLT) instrument dedicated to high-contrast direct imaging of exoplanets whose first-light is scheduled for 2011. Within this complex instrument one of the central components is the apodized Lyot coronagraph (ALC). The principal aim of this paper is to report the first laboratory experiment of the ALC designed for the SPHERE instrument. The performance and sensitivity of the optical configuration was first numerically studied with an end-to-end approach (see the results in paper I subtitled "Detailed numerical study"). Made confident by the results, we then tested a prototype on an infrared coronagraphic bench. We measured the transmission profiles of the apodizer prototype and the coronagraphic performance of the apodized Lyot coronagraph in Y, J, and H bands. The coronagraph sensitivity to lateral and longitudinal misalignments of its three main components (apodizer, coronagraphic mask and Lyot stop) was finally studied in H band. We can conclude that the prototype meets the SPHERE technical requirements for coronagraphy.
机译：SPHERE（代表光谱-偏振高对比度系外行星研究）是第二代超大型望远镜（VLT）仪器，专门用于对系外行星进行高对比度直接成像，其第一光计划于2011年进行。中心成分是切趾的Lyot日冕仪（ALC）。本文的主要目的是报告为SPHERE仪器设计的ALC的首次实验室实验。光学配置的性能和灵敏度首先通过端到端方法进行了数值研究（请参见论文I标题为“详细数值研究”的结果）。我们对结果充满信心，然后在红外电晕台上测试了原型。我们测量了切趾器原型的透射曲线以及在Y，J和H波段切趾的Lyot冠冕仪的电晕性能。最后在H波段研究了日冕仪对它的三个主要成分（切趾器，日冕仪罩和Lyot光阑）的横向和纵向未对准的敏感性。我们可以得出结论，该原型符合SPHERE的冠层照相技术要求。

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