Quality-assurance demands and realization for thin-walled mirror blanks made of ZERODUR for the AXAF project

Hans F. Morian; Konrad Knapp; Peter Hartmann

doi:10.1117/12.164981

7 December 1993 Quality assurance demands and realization for thin-walled mirror blanks made of ZERODUR for the AXAF project

Hans F. Morian, Konrad Knapp, Peter Hartmann

Author Affiliations +

Proceedings Volume 1993, Quality and Reliability for Optical Systems; (1993) https://doi.org/10.1117/12.164981
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

The Advanced X-ray Astrophysics Facility (AXAF) will be a space-based observatory consisting of special mirrors to form images in x rays. The mirrors are composed by nested conical shaped thin walled ZERODUR cylinders. ZERODUR is the ideal material for grazing incidence optics. The production steps of these ZERODUR blanks are briefly described. Different QA techniques, detection of tiny inclusions in the glass ceramic via infrared light, precise dilatometer measurements of the coefficient of thermal expansion and specific optical metrology, had to be applied. Results of the metrology are discussed.

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Hans F. Morian, Konrad Knapp, and Peter Hartmann "Quality assurance demands and realization for thin-walled mirror blanks made of ZERODUR for the AXAF project", Proc. SPIE 1993, Quality and Reliability for Optical Systems, (7 December 1993); https://doi.org/10.1117/12.164981

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