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Wolter type I X-ray telescopes made of slumped glass could be a light-weight alternative to nickel replica
optics. We are following the goal to develop the slumping methods for high accuracy glass segments with an
angular resolution of a few arcseconds by experimental means.
The development of segmented glass optics falls into three distinct areas: slumping process, metrology and
optics assembly. We report on our results in studying the sequence of the slumping process. By observing the
effects of different parameters we got a fine grasp on the process itself. The design of different metrology
methods to measure the figure of the glass segments both in visual and X-ray wavelengths were under way.
Integrating the segments into a structure became a main part in our development. We report on first results.
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Monika Vongehr, Peter Friedrich, Peter Predehl, Heinrich Bräuninger, "Development of slumped glass mirror segments for large x-ray telescopes," Proc. SPIE 7011, Space Telescopes and Instrumentation 2008: Ultraviolet to Gamma Ray, 701115 (15 July 2008); https://doi.org/10.1117/12.789326