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Largest deployable space telescope contains 18 beryllium mirrors.(METALS)
Advanced Materials & Processes, April, 2005
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NASA's James Webb Space Telescope (JWST) features a 6.5-meter (20-foot) aperture primary mirror that will be the largest deployable telescope ever launched, reports Northrop Grumman Corporation, Redondo Beach, Calif. The components consist of 18 hexagonal beryllium segments for the primary mirror, measuring 1.3 meters from tip to tip, and other mirror substrates and support structures.
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Beryllium, one of the lightest of all metals, was selected as the mirror technology for its demonstrated track record operating at cryogenic temperatures (about -240[degrees]C, -400[degrees]F) on ...
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