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Proceedings Paper

Optical verification of the James Webb Space Telescope
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Paper Abstract

The optical system of the James Webb Space Telescope (JWST) is split between two of the Observatory's element, the Optical Telescope Element (OTE) and the Integrated Science Instrument Module (ISIM). The OTE optical design consists of an 18-hexagonal segmented primary mirror (25m2 clear aperture), a secondary mirror, a tertiary mirror, and a flat fine steering mirror used for fine guidance control. All optical components are made of beryllium. The primary and secondary mirror elements have hexapod actuation that provides six degrees of freedom rigid body adjustment. The optical components are mounted to a very stable truss structure made of composite materials. The OTE structure also supports the ISIM. The ISIM contains the Science Instruments (SIs) and Fine Guidance Sensor (FGS) needed for acquiring mission science data and for Observatory pointing and control and provides mechanical support for the SIs and FGS. The optical performance of the telescope is a key performance metric for the success of JWST. To ensure proper performance, the JWST optical verification program is a comprehensive, incremental, end-to-end verification program which includes multiple, independent, cross checks of key optical performance metrics to reduce risk of an on-orbit telescope performance issues. This paper discusses the verification testing and analysis necessary to verify the Observatory's image quality and sensitivity requirements. This verification starts with component level verification and ends with the Observatory level verification at Johnson Space Flight Center. The optical verification of JWST is a comprehensive, incremental, end-to-end optical verification program which includes both test and analysis.

Paper Details

Date Published: 22 June 2006
PDF: 12 pages
Proc. SPIE 6271, Modeling, Systems Engineering, and Project Management for Astronomy II, 62710A (22 June 2006); doi: 10.1117/12.672448
Show Author Affiliations
Brian McComas, Northrop Grumman Space Technology (United States)
Rich Rifelli, Northrop Grumman Space Technology (United States)
Allison Barto, Ball Aerospace and Technologies Corp. (United States)
Adam Contos, Ball Aerospace and Technologies Corp. (United States)
Tony Whitman, ITT Space Systems Division (United States)
Conrad Wells, ITT Space Systems Division (United States)
John Hagopian, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 6271:
Modeling, Systems Engineering, and Project Management for Astronomy II
Martin J. Cullum; George Z. Angeli, Editor(s)

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