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Proceedings Paper

SIRTF-CTA optical performance test
Author(s): John P. Schwenker; Bernhard Rainer Brandl; William Burmester; Joseph L. Hora; Amanda Kathryn Mainzer; Phillip C. Quigley; Jeff Van Cleve
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Paper Abstract

This paper describes the "End to End" optical test conducted on the Space InfraRed Telescope Facility (SIRTF) Cryogenic Telescope Assembly (CTA) in 2001. It was critical to verify SIRTF's optical functionality and quality under optical and thermal conditions that as much as possible simulated the flight environment. The Liquid Nitrogen cooled "Brutus" chamber at Ball Aerospace was the test facility. Flight-like self cooling, thermal blanketing, and auxiliary cooling loops allowed the assembly to reach temperatures close to orbital conditions. (25-5K) Introducing optical sources at the SIRTF focal plane allowed the telescope to perform as the collimating source. A motorized and cryogenically characterized reflection flat was used to direct the refocused images of test sources to visible and IR focal planes in SIRTF's Multi-Instrument Chamber. A sequence of tests was performed to gather data on system focus position, image stability, telescope wavefront and instrument assembly confocality.

Paper Details

Date Published: 5 March 2003
PDF: 14 pages
Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); doi: 10.1117/12.461918
Show Author Affiliations
John P. Schwenker, Ball Aerospace & Technologies Corp. (United States)
Bernhard Rainer Brandl, Cornell Univ. (United States)
William Burmester, Ball Aerospace & Technologies Corp. (United States)
Joseph L. Hora, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Amanda Kathryn Mainzer, Lockheed Martin Advanced Technology Ctr. (United States)
Phillip C. Quigley, Ball Aerospace & Technologies Corp. (United States)
Jeff Van Cleve, Ball Aerospace & Technologies Corp. (United States)


Published in SPIE Proceedings Vol. 4850:
IR Space Telescopes and Instruments
John C. Mather, Editor(s)

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