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Proceedings Paper

Characterization of the tunable filter imager etalon on the JWST Fine Guidance Sensor
Author(s): Craig S. Haley; Clinton Evans; Eric Grant; Rodney Norman; Zeljko Osman; Neil Rowlands; Niladry Roy; Alan Scott; Driss Touahri
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Paper Abstract

The Fine Guidance Sensor (FGS) on the James Webb Space Telescope (JWST) has a science observing capability provided by the Tunable Filter Imager (TFI). The TFI incorporates dielectric coated Fabry-Perot etalon plates with a small vacuum gap. The separation of the plates is controlled by the Etalon Control Electronics (ECE) board, using piezoelectric actuators (PZTs) and capacitive displacement sensors (CDS). The TFI measures over the wavelength range of 1.6 to 4.9 microns with a spectral resolution of R~100. We present the key components of the etalon system and the approach for characterizing and testing the system. Initial results from assembly-level testing are also presented.

Paper Details

Date Published: 10 August 2010
PDF: 12 pages
Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77313L (10 August 2010); doi: 10.1117/12.857906
Show Author Affiliations
Craig S. Haley, COM DEV Canada (Canada)
Clinton Evans, COM DEV Canada (Canada)
Eric Grant, COM DEV Canada (Canada)
Rodney Norman, COM DEV Canada (Canada)
Zeljko Osman, COM DEV Canada (Canada)
Neil Rowlands, COM DEV Canada (Canada)
Niladry Roy, COM DEV Canada (Canada)
Alan Scott, COM DEV Canada (Canada)
Driss Touahri, COM DEV Canada (Canada)


Published in SPIE Proceedings Vol. 7731:
Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark C. Clampin; Howard A. MacEwen, Editor(s)

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