Analysis and design of telescopes for the Far Ultraviolet Spectroscopic Explorer

Scott D. Friedman; Steven J. Conard; David J. Sahnow; Douglas B. McGuffey

doi:10.1117/12.193198

7 November 1994 Analysis and design of telescopes for the Far Ultraviolet Spectroscopic Explorer

Scott D. Friedman, Steven J. Conard, David J. Sahnow, Douglas B. McGuffey

Proceedings Volume 2283, X-Ray and Ultraviolet Spectroscopy and Polarimetry; (1994) https://doi.org/10.1117/12.193198
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Scott D. Friedman, Steven J. Conard, David J. Sahnow, and Douglas B. McGuffey "Analysis and design of telescopes for the Far Ultraviolet Spectroscopic Explorer", Proc. SPIE 2283, X-Ray and Ultraviolet Spectroscopy and Polarimetry, (7 November 1994); https://doi.org/10.1117/12.193198

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