GMT mirror manufacture

GMT mirror manufacture

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Credit: UNIVERSITY OF ARIZONA/SCIENCE PHOTO LIBRARY

Caption: GMT mirror manufacture. An engineer installs ceramic fibre cores within a mold that will be used to create a mirror for the Giant Magellan Telescope (GMT). The GMT will comprise 7 primary mirrors, each one measuring 8.4 metres in diameter. During manufacture, 18 tonnes of borosilicate glass is loaded onto the mold and the whole structure heated within a rotating furnace. The glass is cooled for three months and then polished. Finally, a thin layer of aluminium is applied to create a reflective surface. The GMT is schedule to be completed in 2016.

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Keywords: american, assembly, astronomical, astronomy, astrophysics, casting, circle, circular, constructing, giant magellan telescope, gmt, hexagonal, inspecting, manufacturing, mirror, mirror production, mold, molding, mould, mouldy, optical, optical telescope, optics, round, united states, us, usa

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