Manufacturing of Wolter-I mirror segments with slumped glass

Peter Friedrich; Bernd Aschenbach; Christoph Braig; Heinrich Bräuninger; Bernd Budau; Wolfgang Burkert; Michael J Freyberg; Gisela Hartner; Günther Hasinger; Peter Predehl; Monika Vongehr; Stefano Basso; Oberto Citterio; Mauro Ghigo; Francesco Mazzoleni; Giovanni Pareschi; Udo Dinger; Wilhelm Egle; Ralf Lenke; Georg Luichtel; Herbert Schwarz

doi:10.1117/12.671802

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13 June 2006 Manufacturing of Wolter-I mirror segments with slumped glass

Peter Friedrich, Bernd Aschenbach, Christoph Braig, Heinrich Bräuninger, Bernd Budau, Wolfgang Burkert, Michael J Freyberg, Gisela Hartner, Günther Hasinger, Peter Predehl, Monika Vongehr, Stefano Basso, Oberto Citterio, Mauro Ghigo, Francesco Mazzoleni, Giovanni Pareschi, Udo Dinger, Wilhelm Egle, Ralf Lenke, Georg Luichtel, Herbert Schwarz

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Proceedings Volume 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray; 62661G (2006) https://doi.org/10.1117/12.671802
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

In our ongoing studies of high precision glass slumping we have successfully formed the first Wolter-I X-ray mirror segments with parabola and hyperbola in one piece. It could be demonstrated that the excellent surface roughness of the 0.55 mm thick display glass chosen is conserved during the slumping process. The influence of several parameters of the process, such as maximum temperature, heating and cooling rates etc. have to be measured and controlled with adequate metrology. Currently, we are optimizing the process to reduce the figure errors down to 1 micrometer what will be the starting point for further, final figure error corrections. We point out that metrology plays an important role in achieving a high precision optics, i.e. an angular resolution of a few arcsec. In this paper we report on the results of our studies and discuss them in the context of the requirements for future X-ray telescopes with large apertures.

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Peter Friedrich, Bernd Aschenbach, Christoph Braig, Heinrich Bräuninger, Bernd Budau, Wolfgang Burkert, Michael J Freyberg, Gisela Hartner, Günther Hasinger, Peter Predehl, Monika Vongehr, Stefano Basso, Oberto Citterio, Mauro Ghigo, Francesco Mazzoleni, Giovanni Pareschi, Udo Dinger, Wilhelm Egle, Ralf Lenke, Georg Luichtel, and Herbert Schwarz "Manufacturing of Wolter-I mirror segments with slumped glass", Proc. SPIE 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, 62661G (13 June 2006); https://doi.org/10.1117/12.671802

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