The E-ELT first light spectrograph HARMONI: capabilities and modes

Thatte, Niranjan; Clarke, Fraser; Bryson, Ian; Shnetler, Hermine; Tecza, Matthias; Fusco, Thierry; Bacon, Roland; Richard, Johan; Mediavilla, E.; Neichel, Benoît; Arribas, S.; García-Lorenzo, B.; Evans, Christopher J.; Remillieux, A.; Madi, Kacem El; Herreros, J. M.; Melotte, Dave; O’Brien, Kieran; Tosh, Ian; Vernet, J.; Hammersley, P. L.; Ives, Derek; Finger, Gert; Houghton, R. C. W.; Rigopoulou, D.; Lynn, J.; Allen, Jamie R.; Zieleniewski, Simon; Kendrew, Sarah; Ferraro-Wood, Vanessa; Pécontal-Rousset, Arlette; Kosmalski, Johan; Laurent, Florence; Loupias, M.; Piquéras, Laure; Renault, E.; Blaizot, Jérémy; Daguisé, Eric; Migniau, Jean-Emmanuel; Jarno, Aurélien; Born, Andy; Gallie, Angus; Montgomery, David; Henry, David; Schwartz, Noah; Taylor, W. D.; Zins, G.; Rodríguez-Ramos, L. F.; Cagigas, Miguel A.; Battaglia, G.; Rebolo, R.; Suárez, Elvio Hernández; Gigante-Ripoll, José Vicente; López, Javier Piqueras; Martín, Montserrat Villar; Correia, Carlos; Pascal, Sandrine; Blanco, Léonardo; Vola, Pascal; Épinat, B.; Péroux, Céline; Vigan, A.; Dohlen, Kjetil; Sauvage, Jean-François; Lee, Martin; Carlotti, Alexis; Vérinaud, Christophe; Morris, Tim; Myers, R; Reeves, Andrew; Swinbank, A. M.; Calcines, A.; Larrieu, M.

doi:10.1117/12.2230629

Cited by 38 publications

(19 citation statements)

References 6 publications

(7 reference statements)

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“…In general, the curved detector technology and the new optical designs, which becomes possible due to its use, are of interest for a number of application fields. However, the primary application of the curved detector should be optical devices for scientific research, especially the future astronomical instruments [18][19][20] , which require a perfect performance and operate in unusual modes.…”

Section: Discussionmentioning

confidence: 99%

Advanced optical designs of curved detectors-based two-mirrors unobsured telescopes

Muslimov

Hugot

Lombardo

et al. 2018

Optical Design and Engineering VII

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In the present paper we consider a family of unobscured telescope designs with curved detectors. They are based on classical two-mirror schemes -Ritchey-Chretien, Gregorian and Couder telescopes. It is shown that all the designs provide nearly diffraction limited image quality in the visible domain for 0.4º×0.4º field of view with the f-number of 7. We also provide a brief ghost analysis and point on special features of the systems with curved detectors. Finally, the detector surface shape obtained in each case is analyzed and its' technological feasibility is demonstrated.

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Section: Discussionmentioning

confidence: 99%

Advanced optical designs of curved detectors-based two-mirrors unobsured telescopes

Muslimov

Hugot

Lombardo

et al. 2018

Optical Design and Engineering VII

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“…First-generation instruments of the ELT are HARMONI (Thatte et al, 2016), MAORY (Diolaiti et al, 2016), METIS (Brandl et al, 2016), and MICADO (Davies et al, 2016). The short descriptions of these instruments, enclosed in quotation marks below, are taken from ESO (2018).…”

Section: Elt¯rst-generation Instrumentsmentioning

confidence: 99%

Adaptive Optics for Extremely Large Telescopes

Hippler

2019

J. Astron. Instrum.

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Adaptive Optics (AO) has become a key technology for the largest ground-based telescopes currently under, or close to beginning of, construction. AO is an indispensable component and has basically only one task, that is to operate the telescope at its maximum angular resolution, without optical degradations resulting from atmospheric seeing. Based on three decades of experience using AO usually as an add-on component, all extremely large telescopes and their instrumentation are designed for di®raction limited observations from the very beginning. This paper illuminates various approaches of the ELT, the Giant Magellan Telescope (GMT), and the Thirty-Meter Telescope (TMT), to fully integrate AO in their designs. The paper concludes with a brief look into the requirements that high-contrast imaging poses on AO.

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“…The ELT is currently under construction with an estimated completion date around 2025. The other 2 first light instruments are MICADO [2], a near-infrared, 0.8-2.4 μm, imager and spectrograph, and HARMONI [3], an integral field spectrograph sensitive in the 0.47-2.45 μm regime. All 3 first ELT instruments come with adaptive optics tuned to the scientific requirements and goals of each instrument.…”

Section: Introductionmentioning

confidence: 99%

Single conjugate adaptive optics for the ELT instrument METIS

et al. 2018

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The European Extremely Large Telescope (ELT) is a 39 m large, ground-based optical and near-to mid-infrared telescope under construction in the Chilean Atacama desert. Operation is planned to start around the middle of the next decade. All first light instruments will come with wavefront sensing devices that allow control of the ELT's intrinsic M4 and M5 wavefront correction units, thus building an adaptive optics (AO) system. To take advantage of the ELT's optical performance, full diffraction-limited operation is required and only a high performance AO system can deliver this. Further technically challenging requirements for the AO come from the exoplanet research field, where the task to resolve the very small angular separations between host star and planet, has also to take into account the high-contrast ratio between the two objects. We present in detail the results of our simulations and their impact on high-contrast imaging in order to find the optimal wavefront sensing device for the METIS instrument. METIS is the mid-infrared imager and spectrograph for the ELT with specialised high-contrast, coronagraphic imaging capabilities, whose performance strongly depends on the AO residual wavefront errors. We examined the sky and target sample coverage of a generic wavefront sensor in two spectral regimes, visible and near-infrared, to pre-select the spectral range for the more detailed wavefront sensor type analysis. We find that the near-infrared regime is the most suitable for METIS. We then analysed the performance of Shack-Hartmann and pyramid wavefront sensors under realistic conditions at the ELT, did a balancing with our scientific requirements, and concluded that a pyramid wavefront sensor is the best choice for METIS. For this choice we additionally examined the impact of noncommon path aberrations, of vibrations, and the long-term stability of the SCAO system including high-contrast imaging performance.Keywords Single conjugate adaptive optics · SCAO · ELT · Pyramid wavefront sensor · Shack-Hartmann wavefront sensor · Fragmented pupil · Low wind effect · Non-common path aberrations · High-contrast imaging

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The E-ELT first light spectrograph HARMONI: capabilities and modes

Cited by 38 publications

References 6 publications

Advanced optical designs of curved detectors-based two-mirrors unobsured telescopes

Advanced optical designs of curved detectors-based two-mirrors unobsured telescopes

Adaptive Optics for Extremely Large Telescopes

Single conjugate adaptive optics for the ELT instrument METIS

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