Coating Chamber

Submitted by LSST Coating Chamber Engineer Tomislav Vucina: Photos of construction of the coating chamber, where LSST's mirrors will be recoated every few years. We anticipate M1M3 (coated with aluminum) will be cleaned and recoated every 2 years, and M2 (coated with protective silver) every 5 years. Reflectance monitoring will allow us to predict when this more time-intensive work is necessary, and it will likely be coordinated with other scheduled downtime. More information on the washing and coating process can be found at http://ls.st/m1y