Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990opten..29..658w&link_type=abstract
Optical Engineering (ISSN 0091-3286), vol. 29, June 1990, p. 658-665.
Astronomy and Astrophysics
Astronomy
9
Metal Foils, Mirrors, Soviet Satellites, X Ray Telescopes, Annealing, Design Analysis, Metal Coatings, Surface Properties
Scientific paper
This paper descibes the high-throughput X-ray telescope designed for Spectrum-X, which is the first satellite in a planned series of astronomical satellites called Spectrum. The optical system is an approximation of a Wolter I design in which the paraboloid and hyperboloid are substituted by aluminum-foil conical surfaces. The telescope consists of two sections, the alpha section with the mirrors that give the first reflection and the three-alpha section for the second reflection; in the three-alpha section, the tapering angle of the foil is three times that of the first section. The paper considers various X-ray and optical facilities for the measurement of surface roughness, figure errors, and 'orange peel'.
Byrnak Bjarne P.
Christensen Finn E.
Grundsoe P.
Hornstrup Allan
Westergaard Niels Joergen
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