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Proceedings Paper

Analysis and design of telescopes for the Far Ultraviolet Spectroscopic Explorer
Author(s): Scott D. Friedman; Steven J. Conard; David J. Sahnow; Douglas B. McGuffey
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Paper Abstract

The Far Ultraviolet Spectroscopic Explorer (FUSE) is an astrophysics satellite currently being designed to provide high spectral resolving power ((lambda) /(Delta) (lambda) approximately equals 30,000) observations in the interval 853 - 1248 angstrom, and moderate resolving power ((lambda) /(Delta) (lambda) > 500) over the extended interval 800 - 1600 angstrom. It consists of four co-aligned normal incidence mirrors which illuminate separate Rowland circle spectrograph channels with holographic gratings and delay line microchannel plate detectors. Two telescope mirrors are made of chemical vapor deposited SiC on a reaction bonded SiC substrate, and the remaining two have an Al+LiF coating on Zerodur substrates. The off-axis parabolic mirrors have stringent reflectivity, imaging, lightweighting, and mounting requirements. Important aspects of the optical and mechanical design are discussed, including the surface accuracy requirements on different spatial scales, from microroughness to full figure errors. Also discussed are the mirror lightweighting requirements.

Paper Details

Date Published: 7 November 1994
PDF: 9 pages
Proc. SPIE 2283, X-Ray and Ultraviolet Spectroscopy and Polarimetry, (7 November 1994); doi: 10.1117/12.193198
Show Author Affiliations
Scott D. Friedman, Johns Hopkins Univ. (United States)
Steven J. Conard, Johns Hopkins Univ. (United States)
David J. Sahnow, Johns Hopkins Univ. (United States)
Douglas B. McGuffey, Swales and Associates, Inc. (United States)

Published in SPIE Proceedings Vol. 2283:
X-Ray and Ultraviolet Spectroscopy and Polarimetry
Silvano Fineschi, Editor(s)

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