Design of the master optical reference for the James Webb Space Telescope

J. Scott Knight; Ben Gallagher; Doug Frazier; Tony L. Whitman; Lee D. Feinberg; Murzy Jhabvala; Bill Hayden

doi:10.1117/12.2057622

2 August 2014 Design of the master optical reference for the James Webb Space Telescope

J. Scott Knight, Ben Gallagher, Doug Frazier, Tony L. Whitman, Lee D. Feinberg, Murzy Jhabvala, Bill Hayden

Proceedings Volume 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave; 914306 (2014) https://doi.org/10.1117/12.2057622
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

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.

Citation Download Citation

J. Scott Knight, Ben Gallagher, Doug Frazier, Tony L. Whitman, Lee D. Feinberg, Murzy Jhabvala, and Bill Hayden "Design of the master optical reference for the James Webb Space Telescope", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 914306 (2 August 2014); https://doi.org/10.1117/12.2057622

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