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Proceedings Paper

Fabrication of segmented Wolter type-1 mandrels for the Constellation-X mirror development program
Author(s): Wilhelm J. Egle; Wolfgang Hafner; Axel Matthes; Georg Willma; Alexander Ilg; Heinz Schiehle
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Paper Abstract

Constellation-X is NASA’s next major X-ray observatory, planned to be launched in 2012-2013. Each of the four identical satellites contains a large diameter (1.6 m) spectroscopic X-ray telescope (SXT). The mirror assembly consists of many densely nested Wolter type 1 mirrors with segment angles of 30 and 60 degrees. The mirror segments will be made of thin, accurately shaped glass substrates onto which the reflective mirror surface is replicated from high precision, super polished mandrels. In this paper we report about design, fabrication, metrology and analyses of the optical performance of three prototype mandrels to be used by NASA in the constellation-X mirror development program. The prototype mandrels are characterized by the following features: Material: Zerodur; overall length: 1100 mm; segment angles: > 30°; radius at paraboloid-hyperboloid intersection: 800 mm, 600 mm and 500 mm; focal length: 10 000 mm.

Paper Details

Date Published: 29 January 2004
PDF: 11 pages
Proc. SPIE 5168, Optics for EUV, X-Ray, and Gamma-Ray Astronomy, (29 January 2004); doi: 10.1117/12.507733
Show Author Affiliations
Wilhelm J. Egle, Carl Zeiss Laser Optics GmbH (Germany)
Wolfgang Hafner, Carl Zeiss Laser Optics GmbH (Germany)
Axel Matthes, Carl Zeiss Laser Optics GmbH (Germany)
Georg Willma, Carl Zeiss Laser Optics GmbH (Germany)
Alexander Ilg, Carl Zeiss Laser Optics GmbH (Germany)
Heinz Schiehle, Carl Zeiss Laser Optics GmbH (Germany)

Published in SPIE Proceedings Vol. 5168:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy
Oberto Citterio; Stephen L. O'Dell, Editor(s)

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