Prolonging the Lifetime of Mirror Coatings with a Mirror Purge System

Details Prolonging the Lifetime of Mirror Coatings with a Mirror Purge System Prolonging the Lifetime of Mirror Coatings with a Mirror Purge System

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pasp..117..290r&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 117, Issue 829, pp. 290-294.

Astronomy and Astrophysics

Astronomy

1

Telescopes, Instrumentation: Miscellaneous

Scientific paper

Most ground-based telescope mirror coatings are exposed to hostile environments, as the humidity, dust, and reactive gases in the air corrode and tarnish the coating. As the coating degrades the scatter increases. Eventually, every mirror needs to be recoated. This is a costly, time-consuming process that requires telescope down time and involves risks to both people and to equipment. The AEOS (Advanced Electro-Optical System) telescope has a mirror purge system that fills the mirror cell with dry air while the telescope is stowed. We present results conclusively demonstrating that this system extends the lifetime of the AEOS primary mirror coating, reducing the need for burdensome recoating.
Based on observations made at the Maui Space Surveillance System, operated by Detachment 15 of the US Air Force Research Laboratory's Directed Energy Directorate.

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