Share Email Print
cover

Proceedings Paper

Developing high-performance reflective coatings for the tunable filter and the high-order interferometer of the 3D-NTT
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper 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.

Paper Details

Date Published: 28 July 2008
PDF: 10 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 70133N (28 July 2008); doi: 10.1117/12.789498
Show Author Affiliations
Marie-Maude de Denus-Baillargeon, Lab. d'Astrophysique Expérimentale, Univ. de Montréal (Canada)
Institut Fresnel, Domaine Univ. St-Jérôme (France)
Laëtitia Abel-Tibérini, Institut Fresnel, Domaine Univ. St-Jérôme (France)
Michel Lequime, Institut Fresnel, Domaine Univ. St-Jérôme (France)
Claude Carignan, Lab. d'Astrophysique Expérimentale, Univ. de Montréal (Canada)
Observatoire d'Astrophysique de l'Univ. de Ouagadougou (Burkina Faso)
Lab. d'Astrophysique de Marseille, Observatoire Astronomique de Marseille-Provence (France)
Benoît Épinat, Lab. d'Astrophysique de Marseille, Observatoire Astronomique de Marseille-Provence (France)
Jean-Luc Gach, Lab. d'Astrophysique de Marseille, Observatoire Astronomique de Marseille-Provence (France)
Olivier Hernandez, Lab. d'Astrophysique Expérimentale, Univ. de Montréal (Canada)
Michel Marcelin, Lab. d'Astrophysique de Marseille, Observatoire Astronomique de Marseille-Provence (France)


Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

© SPIE. Terms of Use
Back to Top