Last updated on April 17, 2014 at 12:58 EDT
Kepler Primary Mirror
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Kepler Primary Mirror

March 4, 2009
Inspection of the primary mirror honeycomb structure. The mirror has been 86% light weighted. That is it only weighs 14% (1/7) that of a solid mirror of the same dimensions. The mirror blank was made by Corning Glass works out of ULE, ultra-low expansion glass. The optical polishing of the mirror was performed by Brashear LP.