GMT mirror casting at UA

GMT2: The Steward Observatory Mirror Lab casting crew inspects over 38,000 pounds of E6 borosilicate glass pieces for every 8.4 meter diameter mirror blank cast. Randy Lutz, manager of the Lab casting team, uses polarized lighting and glasses to verify the quality of each glass piece shipped from Ohara in Japan. Only the highest quality glass is used in the casting process.

August 24, 2013 4:07 pm  • 

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