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Proceedings Paper

JWST: Tinsley achievements on the largest beryllium polishing project
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Paper 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.

Paper Details

Date Published: 13 September 2012
PDF: 17 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845021 (13 September 2012); doi: 10.1117/12.926715
Show Author Affiliations
Jay Daniel, L-3 Communications Tinsley Labs. Inc. (United States)
Tony Hull, Univ. of New Mexico (United States)
John B. Barentine, L-3 Communications Tinsley Labs. Inc. (United States)


Published in SPIE Proceedings Vol. 8450:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
Ramón Navarro; Colin R. Cunningham; Eric Prieto, Editor(s)

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