Optimization of Protected Silver Coating Recipes for E-ELT Telescope Mirrors (Conference Presentation)

Ronald Holzlöhner; Michele Cirasuolo; Ricardo A. Parra; Svetlana Shestaeva; Stefan Schwinde

doi:10.1117/12.3019915

26 August 2024 Optimization of Protected Silver Coating Recipes for E-ELT Telescope Mirrors (Conference Presentation)

Ronald Holzlöhner, Michele Cirasuolo, Ricardo A. Parra, Svetlana Shestaeva, Stefan Schwinde

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 1310020 (2024) https://doi.org/10.1117/12.3019915
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

Most telescope mirrors of the European ELT shall have protected silver coatings that are highly reflective across all astronomic wavelength bands from the UV (370 nm) to the far infrared. Another aspect is that the coatings shall be frequently cleaned in situ, so they must be highly durable against abrasion and chemical agents such as sulfur and salt. However, they also must be easy to strip with a non-toxic etchant before each recoating. We identify trades and optimize silver coating recipes with different protection layer materials and thicknesses to meet these partly contradictory objectives. A test coating campaign is ongoing.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ronald Holzlöhner, Michele Cirasuolo, Ricardo A. Parra, Svetlana Shestaeva, and Stefan Schwinde "Optimization of Protected Silver Coating Recipes for E-ELT Telescope Mirrors (Conference Presentation)", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 1310020 (26 August 2024); https://doi.org/10.1117/12.3019915

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