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Proceedings Paper

James Webb Space Telescope Optical Simulation Testbed I: overview and first results
Author(s): Marshall D. Perrin; Rémi Soummer; Élodie Choquet; Mamadou N'Diaye; Olivier Levecq; Charles-Philippe Lajoie; Marie Ygouf; Lucie Leboulleux; Sylvain Egron; Rachel Anderson; Chris Long; Erin Elliott; George Hartig; Laurent Pueyo; Roeland van der Marel; Matt Mountain
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Paper Abstract

The James Webb Space Telescope (JWST) Optical Simulation Testbed (JOST) is a tabletop workbench to study aspects of wavefront sensing and control for a segmented space telescope, including both commissioning and maintenance activities. JOST is complementary to existing optomechanical testbeds for JWST (e.g. the Ball Aerospace Testbed Telescope, TBT) given its compact scale and flexibility, ease of use, and colocation at the JWST Science & Operations Center. We have developed an optical design that reproduces the physics of JWST's three-mirror anastigmat using three aspheric lenses; it provides similar image quality as JWST (80% Strehl ratio) over a field equivalent to a NIRCam module, but at HeNe wavelength. A segmented deformable mirror stands in for the segmented primary mirror and allows control of the 18 segments in piston, tip, and tilt, while the secondary can be controlled in tip, tilt and x, y, z position. This will be sufficient to model many commissioning activities, to investigate field dependence and multiple field point sensing & control, to evaluate alternate sensing algorithms, and develop contingency plans. Testbed data will also be usable for cross-checking of the WFS&C Software Subsystem, and for staff training and development during JWST's five- to ten-year mission.

Paper Details

Date Published: 2 August 2014
PDF: 13 pages
Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 914309 (2 August 2014); doi: 10.1117/12.2056936
Show Author Affiliations
Marshall D. Perrin, Space Telescope Science Institute (United States)
Rémi Soummer, Space Telescope Science Institute (United States)
Élodie Choquet, Space Telescope Science Institute (United States)
Mamadou N'Diaye, Space Telescope Science Institute (United States)
Olivier Levecq, Space Telescope Science Institute (United States)
Institut d'Optique Graduate School (France)
Charles-Philippe Lajoie, Space Telescope Science Institute (United States)
Marie Ygouf, Space Telescope Science Institute (United States)
Lucie Leboulleux, Space Telescope Science Institute (United States)
Institut d'Optique Graduate School (France)
Sylvain Egron, Space Telescope Science Institute (United States)
Institut d'Optique Graduate School (France)
Rachel Anderson, Space Telescope Science Institute (United States)
Chris Long, Space Telescope Science Institute (United States)
Erin Elliott, Space Telescope Science Institute (United States)
George Hartig, Space Telescope Science Institute (United States)
Laurent Pueyo, Space Telescope Science Institute (United States)
Roeland van der Marel, Space Telescope Science Institute (United States)
Matt Mountain, Space Telescope Science Institute (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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