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Proceedings Paper

Design of the master optical reference for the James Webb Space Telescope
Author(s): J. Scott Knight; Ben Gallagher; Doug Frazier; Tony L. Whitman; Lee D. Feinberg; Murzy Jhabvala; Bill Hayden
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Paper Abstract

The James Webb Space Telescope (JWST) requires testing of the full optical system in a cryogenic vacuum environment before launch. Challenges with the telescope architecture and the test environment lead to placing removable optical test sources at the Cassegrain intermediate focus of the Telescope. The optical test sources are used to establish the system alignment and provide test illumination to the Science Instrument suite. The Aft Optics Subsystem (AOS) Source Plate Assembly (ASPA) comprises sources, control electronics, cryogenic optical fiber and a precision mechanical structure. The system provides point source illumination from visible to mid infrared, narrow and broadband, and with an optical power range of 10 orders of magnitude. The precision metering structure holding the sources is mounted temporarily to the flight hardware to be removed after the system test campaign.

Paper Details

Date Published: 2 August 2014
PDF: 14 pages
Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 914306 (2 August 2014); doi: 10.1117/12.2057622
Show Author Affiliations
J. Scott Knight, Ball Aerospace & Technologies Corp. (United States)
Ben Gallagher, Ball Aerospace & Technologies Corp. (United States)
Doug Frazier, Ball Aerospace & Technologies Corp. (United States)
Tony L. Whitman, Exelis Inc. (United States)
Lee D. Feinberg, NASA Goddard Space Flight Ctr. (United States)
Murzy Jhabvala, NASA Goddard Space Flight Ctr. (United States)
Bill Hayden, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9143:
Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark Clampin; Giovanni G. Fazio; Howard A. MacEwen, Editor(s)

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