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Proceedings Paper

Tracking the surface figure error of the pick off mirror throughout build and environmental testing of the focus and alignment mechanism qualification unit of the near-infrared camera of JWST
Author(s): Bear Witherspoon; Lynn Huff; Greg Feller; Paul Mammini
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Paper Abstract

The Pick Off Mirror (POM) is the business end of the Focus and Alignment Mechanism (FAM) of NIRCam. The POM harnesses the light delivered by the telescope and steers it into the Near Infrared Camera. At strategic points during the build and test of the Pick Off Mirror and its mechanism (the FAM) the surface figure error (SFE) of the mirror was monitored. This metric was used to track the health of the mirror throughout this testing regime. For example, the team ran an SFE test before and after Vibration testing the FAM. In this paper, we will provide an overview of the testing regime and the results of these periodic SFE tests. These results lead to the qualification of the POM and FAM designs for flight on the James Webb Space Telescope.

Paper Details

Date Published: 29 September 2011
PDF: 12 pages
Proc. SPIE 8150, Cryogenic Optical Systems and Instruments XIII, 81500H (29 September 2011); doi: 10.1117/12.896619
Show Author Affiliations
Bear Witherspoon, Lockheed Martin Space Systems Co. (United States)
Lynn Huff, Lockheed Martin Space Systems Co. (United States)
Greg Feller, Lockheed Martin Space Systems Co. (United States)
Paul Mammini, Lockheed Martin Space Systems Co. (United States)


Published in SPIE Proceedings Vol. 8150:
Cryogenic Optical Systems and Instruments XIII
James B. Heaney; E. Todd Kvamme, Editor(s)

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