Protected-silver coatings for the 8-m Gemini telescope mirrors

M. Boccas, T. Vucina, C. Araya, E. Vera, C. Ahhee

Resultado de la investigación: Contribución a una revistaArtículo de la conferenciarevisión exhaustiva

51 Citas (Scopus)


The twin 8-m diameter Gemini telescopes were designed to use silver-based coatings on the mirrors in order to provide very high reflectivity and ultra-low emissivity for optimal infrared performance. A feasibility study provided both techniques and recipes to apply these thin films, and showed that a reflectivity of 99.1% at 10 μm was achievable. We have now produced bare and protected silver sputtered films in our coating plants and conducted environmental testing, both accelerated and in real-life conditions, to assess the durability in an observatory environment. We have also already applied, for the first time ever, protected-silver coatings on the main optical elements of a large telescope. We report here the performance of the films, the challenges to coat a 50 m2 primary mirror (M1) and our plans for coating maintenance.

Idioma originalInglés
Páginas (desde-hasta)275-280
Número de páginas6
PublicaciónThin Solid Films
EstadoPublicada - 28 abr. 2006
Publicado de forma externa
EventoSelected Papers from the 5th International Conference on Caotings on Glass (ICCG5) -
Duración: 4 jul. 20048 jul. 2004


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