13 September 2012 JWST: Tinsley achievements on the largest beryllium polishing project
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Abstract
Polished 1.5m bare beryllium, off-axis aspheric mirror segments, constituting the cryogenic primary mirror of NASA's ambitious Flagship Mission, James Webb Space Telescope (JWST), have been successfully completed at L-3 Communications -Tinsley. Tinsley has finished the secondary, tertiary, fine steering and spare mirrors as well. We will describe both the end results, where it was demonstrated that visible quality mirror results can be achieved on large extremely lightweighted compliant off-axis mirrors, and the steps taken at Tinsley to achieve these results. Over 26 square-meters of bare beryllium were optically processed twice, first for room temperature figure, then for the cryo-null figure for the cryogenic differences.
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Jay Daniel, Jay Daniel, Tony Hull, Tony Hull, John B. Barentine, John B. Barentine, } "JWST: Tinsley achievements on the largest beryllium polishing project", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845021 (13 September 2012); doi: 10.1117/12.926715; https://doi.org/10.1117/12.926715
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