JWST: Tinsley achievements on the largest beryllium polishing project

Jay Daniel; Tony Hull; John B. Barentine

doi:10.1117/12.926715

13 September 2012 JWST: Tinsley achievements on the largest beryllium polishing project

Jay Daniel, Tony Hull, John B. Barentine

Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 845021 (2012) https://doi.org/10.1117/12.926715
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

Citation Download Citation

Jay Daniel, Tony Hull, and 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); https://doi.org/10.1117/12.926715

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