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Final assembly, metrology, and testing of the WEAVE fibre positioner

Ground-based and Airborne Instrumentation for Astronomy VIII Proc. SPIE 11447 (2020) 114477R

Authors:

Sarah Hughes, Ellen Schallig, Ian J. Lewis, Gavin Dalton, David Terrett, Don Carlos Abrams, J. Alfonso L. Aguerri, Georgia Bishop, Piercarlo Bonifacio, Matthew Brock, Esperanza Carrasco, Kevin Middleton, Scott C. Trager, Antonella Vallenari

Abstract:

WEAVE is the new wide-field spectroscopy facility for the prime focus of the William Herschel Telescope at La Palma, Spain. Its fibre positioner is essential for the accurate placement of the spectrograph's 960 fibre multiplex. We provide an overview of the final assembly and metrology of the fibre positioner, and results of lab commissioning of its robot gantries. A completely new z-gantry for each positioner robot was acquired, with measurements showing a marked improvement in positioning repeatability. We also present the first results of the configuration software testing, and discuss the metrology procedures that must be repeated after the positioner's arrival at the observatory.
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HARMONI - first light spectroscopy for the ELT: final design of the integral field unit

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 11451 (2020) 1145138-1145138-11

Authors:

Magali Loupias, Johan Richard, Alban Remillieux, Jean-Emmanuel Migniau, Florence Laurent, Alexandre Jeanneau, Karen Disseau, Eric Daguise, Diane Chapuis, Didier Boudon, Nicolas Bouché, Hermine Schnetler, Ian Bryson, Dave Melotte, Angus Gallie, Niranjan A Thatte, Fraser Clarke, Matthias Tecza, Edgard Renault, Johan Kosmalski
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HARMONI - first light spectroscopy for the ELT: novel techniques for the calibration of non-common path aberrations

SPIE, the international society for optics and photonics (2020) 349

Authors:

Alvaro Menduina, Matthias Tecza, Niranjan Thatte
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HARMONI first light spectroscopy for the ELT: geometrical calibration in the data reduction software

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 11452 (2020) 114522t-114522t-16

Authors:

Laure Piqueras, Aurélien Jarno, Louise Friot-Giroux, Thomas Béchet, Javier Piqueras López, Arlette Pécontal, Johan Richard, Nicolas Bouché, Niranjan A Thatte, Matthias Tecza
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HARMONI: Characterising the line-spread-function with a tunable Fabry-Pérot etalon

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 11451 (2020) 114515w-114515w-6

Authors:

Darshan Kakkad, Matthias Tecza, Niranjan A Thatte, Javier Piqueras López, Harry Kendell
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