Developing high-performance reflective coatings for the tunable filter and the high-order interferometer of the 3D-NTT

Marie-Maude de Denus-Baillargeon; Laëtitia Abel-Tibérini; Michel Lequime; Claude Carignan; Benoît Épinat; Jean-Luc Gach; Olivier Hernandez; Michel Marcelin

doi:10.1117/12.789498

28 July 2008 Developing high-performance reflective coatings for the tunable filter and the high-order interferometer of the 3D-NTT

Marie-Maude de Denus-Baillargeon, Laëtitia Abel-Tibérini, Michel Lequime, Claude Carignan, Benoît Épinat, Jean-Luc Gach, Olivier Hernandez, Michel Marcelin

Author Affiliations +

Proceedings Volume 7013, Optical and Infrared Interferometry; 70133N (2008) https://doi.org/10.1117/12.789498
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

The following article describes the coatings of both Fabry-Perot (FP) etalons to be installed in the integral field spectrometer 3D-NTT. This simultaneous use of two FP etalons of high and low resolution respectively is the new concept upon which the 3D-NTT is built. Design and fabrication of the coatings of those etalons is a critical step to be able to achieve the desired performances of the instrument. More precisely, these etalons will have to show less than a 10% variation of the finesse from 370 to 900nm and a better than lambda/100 cumulative optical uniformity over a Ø100mm surface. The aim is thus to design high-reflectivity coatings for each of the FP etalon. The design process of the two sets of coatings will be described first, then the expected performances of each etalon will be presented and finally the progresses in the making of these coatings will be discussed.

Citation Download Citation

Marie-Maude de Denus-Baillargeon, Laëtitia Abel-Tibérini, Michel Lequime, Claude Carignan, Benoît Épinat, Jean-Luc Gach, Olivier Hernandez, and Michel Marcelin "Developing high-performance reflective coatings for the tunable filter and the high-order interferometer of the 3D-NTT", Proc. SPIE 7013, Optical and Infrared Interferometry, 70133N (28 July 2008); https://doi.org/10.1117/12.789498

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