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Proceedings Paper

Optical metrology of the JWST Integrated Science Instrument Module test platform
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Paper Abstract

The James Webb Space Telescope is a large infrared observatory with a segmented primary mirror, part of the Optical Telescope Element (OTE), and four science instruments supported by the Integrated Science Instrument Module (ISIM). We present the calibration plan for the ISIM Test Platform (ITP) which replicates the ISIM-to-OTE interface: to calibrate the location and orientation of metrology features at ambient and cryogenic environmental conditions, to verify that ITP behavior (deflection under load, warm-to-cold alignment shift) can be modeled, predicted, and tested, to prove that the ITP is stable (upon repeated cryogenic cycles, and after loading and handling), and to calibrate the relationship between the Master Alignment Target Fixture and the ITP at ambient and cryogenic conditions.

Paper Details

Date Published: 21 August 2009
PDF: 11 pages
Proc. SPIE 7433, Optical System Alignment, Tolerancing, and Verification III, 743304 (21 August 2009); doi: 10.1117/12.824237
Show Author Affiliations
Joseph M. Stock, Stinger Ghaffarian Technologies, Inc. (United States)
Joseph A. Connelly, NASA Goddard Space Flight Ctr. (United States)
Maria D. Nowak, NASA Goddard Space Flight Ctr. (United States)
Gregory W. Wenzel, QinetiQ North America, Inc. (United States)
Kevin W. Redman, QinetiQ North America, Inc. (United States)


Published in SPIE Proceedings Vol. 7433:
Optical System Alignment, Tolerancing, and Verification III
José Sasián; Richard N. Youngworth, Editor(s)

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