James Webb Space Telescope Primary Mirror Manufacturing

Details James Webb Space Telescope Primary Mirror Manufacturing James Webb Space Telescope Primary Mirror Manufacturing

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21342619l&link_type=abstract

American Astronomical Society, AAS Meeting #213, #426.19; Bulletin of the American Astronomical Society, Vol. 41, p.257

Astronomy and Astrophysics

Astronomy

Scientific paper

The James Webb Space Telescope has a segmented primary mirror consisting of 18 hexagonal beryllium primary mirror segment assemblies (PMSA) that have a total collecting area greater than 25 square meters. The PMSAs are designed to operate at cryogenic temperatures (39 K) and to be actively controlled to co-phase the segments. This paper discusses the processes and testing utilized in the manufacture of these mirrors including the critical cryogenic testing performed at the XRCF facility at the NASA Marshall Space Flight Center. The manufacturing team is headed by Ball Aerospace & Technologies Corp (BATC) with support from Brush Wellman for beryllium blank fabrication, Axsys Technologies for the precision machining, L3-Tinsley for the mirror polishing, and QCI for the reflective coating application.

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