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Proceedings Paper

Recent results on manufacturing of segmented x-ray mirrors with slumped glass
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Paper Abstract

Future X-ray missions are aiming at large mirror collecting areas of the order of several square meters. This is obtained with mirror assemblies composed of a large number of segments. The angular resolution of each one must be measured separately down to 1 arcsec. The mass limits imposed by the launchers require low weight and high stiffness materials. In this context we have focused our recent studies on the manufacturing of thin glass mirror segments. These mirrors are made from sheet glass which can be shaped in a high-precision slumping process to e.g. a Wolter-I figure. The excellent surface roughness of the sheet glass chosen is conserved during the slumping process and the final figure corrections with non-contacting tools. The influence of several parameters of the process, such as glass and mould material, heating and cooling, has been measured and controlled with adequate metrology. In this paper we describe our current efforts which are aiming at the production of a Wolter-I scaled demonstration model - preferentially with parabola and hyperbola in one piece - made of thin sheet glass.

Paper Details

Date Published: 8 September 2005
PDF: 8 pages
Proc. SPIE 5900, Optics for EUV, X-Ray, and Gamma-Ray Astronomy II, 59000W (8 September 2005); doi: 10.1117/12.617216
Show Author Affiliations
Peter Friedrich, Max-Planck-Institut für extraterrestrische Physik (Germany)
Bernd Aschenbach, Max-Planck-Institut für extraterrestrische Physik (Germany)
Heinrich Bräuninger, Max-Planck-Institut für extraterrestrische Physik (Germany)
Guenther Hasinger, Max-Planck-Institut für extraterrestrische Physik (Germany)
Oberto Citterio, Osservatorio Astronomico di Brera (Italy)
Mauro Ghigo, Osservatorio Astronomico di Brera (Italy)
Francesco Mazzoleni, Osservatorio Astronomico di Brera (Italy)
Giovanni Pareschi, Osservatorio Astronomico di Brera (Italy)
Udo Dinger, Carl Zeiss Laser Optics GmbH (Germany)
Wilhelm Egle, Carl Zeiss Laser Optics GmbH (Germany)
Axel Matthes, Carl Zeiss Laser Optics GmbH (Germany)

Published in SPIE Proceedings Vol. 5900:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy II
Oberto Citterio; Stephen L. O'Dell, Editor(s)

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