Extremely Large Telescope

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HARMONI-ELT instrument integral field unit test tools development

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13100 (2024) 131004l-131004l-13

Authors:

Magali Loupias, Johan Richard, Alban Remillieux, Jean-Emmanuel Migniau, Florence Laurent, Alexandre Jeanneau, Aurélien Jarno, Eric Daguisé, Adrien Girardot, Matthieu Guibert, Rémi Giroud, Didier Boudon, Nicolas Bouché, Dawn Wasley, Dave Melotte, Niranjan A Thatte, Fraser Clarke, Matthias Tecza
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Image slicing with a twist: testing and characterising a prototype image slicer for ELT-PCS

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13100 (2024) 1310012-1310012-7

Authors:

Matthias Tecza, R Elliot Meyer, Niranjan Thatte, Takashi Sukegawa, Tomonao Nakayasu, Masatsugu Koyama
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Magnetorheological finishing of volume phase holographic gratings for high fidelity spectrograph wavefront performance

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13100 (2024) 131001s-131001s-8

Authors:

Andrew Clawson, Elroy L Pearson, Niranjan Thatte, Matthias Tecza, Elliot Meyer, David Gooding, Edgar Castillo Dominguez, Eduard Muslimov, Christopher Hall, Michael DeMarco, David J Creasey, Cicely A Rathmell
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Estimate of the environment impact of the ELT instrument MOSAIC

Proceedings of SPIE Astronomical Telescopes + Instrumentation 2024 Society of Photo-optical Instrumentation Engineers 13099 (2024)

Authors:

Annemieke Janssen, Gavin Dalton, Myriam Rodrigues

Abstract:

MOSAIC is an instrument for the Extremely Large Telescope (ELT). The instrument has started phase B, and apart from technical and financial requirements, MOSAIC has the additional requirement to investigate and minimise its environmental impact. The first step is to estimate the carbon footprint (and other effects) in a ‘Life Cycle Analysis’, for the instrument development up to Provisional Acceptance in Chile. This paper presents a preliminary analysis, aimed at identifying potential contributors to environmental impact. Investigated contributors are: materials, Full-Time-Equivalents, travel, and transport of the instrument. Not yet investigated (due to lack of information or certainty) are: electronics, test facilities and prototyping. Uncertainty in input data and conversion factors leads to error bars of a factor 2 or larger. Therefore, the outcome of the analysis can be used for internal comparison of contributors only, and it should not be used for comparison to other instruments or disciplines.
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HARMONI at ELT: modelling the optical performance of a diffraction limited integral field spectrograph

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 13099 (2024) 1309906-1309906-13

Authors:

Stephen P Todd, Charlotte Z Bond, Fraser Clarke, Éamonn J Harvey, Álvaro Menduiña-Fernández, Matthias Tecza
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