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13 December 2020 HARMONI: First light spectroscopy for the ELT: final design and assembly plan of the spectrographs
Z. Ozer, H. Schnetler, F. T. Bagci, M. Booth, M. Brock, N. Cann, J. Capone, J. Chao Ortiz, G. Dalton, N. Dobson, T. Foster, A. Hidalgo Valadez, J. Kariuki, I. Lewis, A. Lowe, J. Lynn, M. Rodrigues, I. Tosh, F. Clarke, M. Tecza, N. Thatte
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Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114472H (2020) https://doi.org/10.1117/12.2560359
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only
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Abstract
HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. It covers a large spectral range from 450nm to 2450nm with resolving powers from R (≡λ/Δλ) 3500 to 18000 and spatial sampling from 60mas to 4mas. It can operate in two Adaptive Optics modes - SCAO (including a High Contrast capability) and LTAO - or with NOAO. The project is preparing for Final Design Reviews. The instrument uses a field splitter and image slicer to divide the field into 4 sub-units, each providing an input slit to one of four nearly identical spectrographs. This proceeding presents the final opto- mechanical design and the AIV plan of the spectrograph units.
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Z. Ozer, H. Schnetler, F. T. Bagci, M. Booth, M. Brock, N. Cann, J. Capone, J. Chao Ortiz, G. Dalton, N. Dobson, T. Foster, A. Hidalgo Valadez, J. Kariuki, I. Lewis, A. Lowe, J. Lynn, M. Rodrigues, I. Tosh, F. Clarke, M. Tecza, and N. Thatte "HARMONI: First light spectroscopy for the ELT: final design and assembly plan of the spectrographs", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114472H (13 December 2020); https://doi.org/10.1117/12.2560359
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KEYWORDS
Spectrographs
Iterated function systems
Near infrared
Optomechanical design
Spectral resolution
Spectroscopes
Visible radiation
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