Qualifying the flight design of the focus and alignment mechanism of the near-infrared camera on the James Webb Space Telescope

Bear Witherspoon

doi:10.1117/12.896620

28 September 2011 Qualifying the flight design of the focus and alignment mechanism of the near-infrared camera on the James Webb Space Telescope

Bear Witherspoon

Author Affiliations +

Proceedings Volume 8150, Cryogenic Optical Systems and Instruments XIII; 81500I (2011) https://doi.org/10.1117/12.896620
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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.

Citation Download Citation

Bear Witherspoon "Qualifying the flight design of the focus and alignment mechanism of the near-infrared camera on the James Webb Space Telescope", Proc. SPIE 8150, Cryogenic Optical Systems and Instruments XIII, 81500I (28 September 2011); https://doi.org/10.1117/12.896620

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