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Proceedings Paper

Qualifying the flight design of the focus and alignment mechanism of the near-infrared camera on the James Webb Space Telescope
Author(s): Bear Witherspoon
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Paper Abstract

The Focus and Alignment Mechanism (FAM) is the opto-mechanical, cryogenic mechanism that positions the Pick Off Mirror (POM) for the Near Infrared Camera of the James Webb Space Telescope. The POM is used to direct the light collected by the telescope into the Near Infrared Camera. This paper is a follow on to SPIE Paper 7439C-49. In this paper, we will summarize the design and role of this opto-mechanical mechanism and present the results of the environmental testing of the Qualification Unit. The testing consisted of 7 thermal cycles from ambient temperature to 26 Kelvin, as well as a 2 × Mechanism Life test at this cryogenic temperature plateau. These results lead to the qualification of the POM and FAM designs for flight on the James Webb Space Telescope.

Paper Details

Date Published: 28 September 2011
PDF: 10 pages
Proc. SPIE 8150, Cryogenic Optical Systems and Instruments XIII, 81500I (28 September 2011); doi: 10.1117/12.896620
Show Author Affiliations
Bear Witherspoon, 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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