Upgrades to the Magellan Telescopes mirror coating process

Juan Espoz; Nicole David; Povilas Palunas

doi:10.1117/12.2563629

13 December 2020 Upgrades to the Magellan Telescopes mirror coating process

Juan Espoz, Nicole David, Povilas Palunas

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114515R (2020) https://doi.org/10.1117/12.2563629
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The main goal of the mirror coating process is to deposit a thin homogeneous layer of aluminum over the bare glass. This is a very delicate process, which involves careful cleaning, high vacuum, and controlled vaporization of the aluminum filaments, so many variables influence the final result. One of the problems is the aluminum drops that fall from the filaments during the fire due to the power difference between them. This work focuses on reducing this power variance between filaments by proposing a new busbar arrangement, which will improve the heating curve and reduce the occurrence of drops over the mirror.

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Juan Espoz, Nicole David, and Povilas Palunas "Upgrades to the Magellan Telescopes mirror coating process", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114515R (13 December 2020); https://doi.org/10.1117/12.2563629

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