مؤتمر
Design of the VLTI/Hi-5 light injection system
| العنوان: | Design of the VLTI/Hi-5 light injection system |
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| المؤلفون: | Garreau, Germain, Bigioli, Azzurra, Raskin, Gert, Berger, Jean-Philippe, Dandumont, Colin, Kenchington Goldsmith, Harry-Dean, Gross, Simon, Ireland, Michael J., Labadie, Lucas, Laugier, Romain, Loicq, Jerôme, Madden, Stephen, Martin, Guillermo, Mazzoli, Alexandra, Morren, Johan, Shao, Hancheng, Yan, Kunlun, Defrere, Denis |
| المساهمون: | CSL - Centre Spatial de Liège - ULiège, STAR - Space sciences, Technologies and Astrophysics Research - ULiège |
| المصدر: | Proceedings of SPIE: The International Society for Optical Engineering, 12183 (2022-08-26); SPIE Astronomical Telescopes + Instrumentation 2022, Montréal, Canada [CA], du 17 juillet au 22 juillet 2022 |
| بيانات النشر: | International Society for Optical Engineering, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Instrumentation, nulling interferometry, VLTI, Hi-5, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique |
| الوصف: | Hi-5 is an ERC-funded project hosted at KU Leuven and a proposed visitor instrument for the VLTI. Its primary goal is to image the snow line region around young planetary systems using nulling interferometry in the L’ band, between 3.5 and 4.1 μm, where the contrast between exoplanets and their host stars is very advantageous. The breakthrough is the use of a photonic chip based beam combiner, which only recently allowed the required theoretical raw contrast of 10−3 in this spectral range. The VLTI long baseline interferometry enables to reach high angular resolution (4.2 mas at 3.8 μm wavelength with the Auxiliary Telescopes (ATs)), while high contrast detection is achieved using nulling interferometry. This polarisation requires a high degree of optical symmetry between the four pupils of the VLTI, only possible with precise phase, dispersion and intensity control systems. The instrument is currently in its design phase. In this paper, the warm optics design and the injection system up to the photonic chip are presented. The different properties of the design are presented including the optics used, the characteristics of the four beams and the current drawbacks. Particular attention is devoted to the optical alignment and the tolerance analysis in order to estimate the precision required for the alignment procedure and therefore to choose adapted optical mountings. SCIFY |
| نوع الوثيقة: | conference paper http://purl.org/coar/resource_type/c_5794 conferenceObject |
| اللغة: | English |
| Relation: | info:eu-repo/grantAgreement/EC/H2020/866070; urn:issn:0277-786X; urn:issn:1996-756X |
| DOI: | 10.1117/12.2629180 |
| URL الوصول: | https://orbi.uliege.be/handle/2268/294121 |
| حقوق: | open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
| رقم الأكسشن: | edsorb.294121 |
| قاعدة البيانات: | ORBi |
| DOI: | 10.1117/12.2629180 |
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