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Proceedings Article

Progress report on air bearing slumping of thin glass mirrors for x-ray telescopes

[+] Author Affiliations
Mark L. Schattenburg, Ralf K. Heilmann

MIT Kavli Institute for Astrophysics and Space Research (United States)

Brandon Chalifoux, Michael D. DeTienne, Heng Zuo

Massachusetts Institute of Technology (United States)

Proc. SPIE 9603, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VII, 96030R (September 4, 2015); doi:10.1117/12.2189970
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From Conference Volume 9603

  • Optics for EUV, X-Ray, and Gamma-Ray Astronomy VII
  • Stephen L. O'Dell; Giovanni Pareschi
  • San Diego, California, United States | August 09, 2015

abstract

The successful NuSTAR telescope was fabricated with thin glass mirrors formed into conic shapes by thermal slumping of thin glass sheets onto high precision mandrels. While mirrors generated by this process have very good figure, the best mirrors to date have a resolution limited to ~7 arc sec, due primarily to mid-range scale spatial frequency errors. These mid-range errors are believed to be due to clumping and particulates in the anti-stick coatings used to prevent sticking between mandrel and mirrors. We have developed a new slumping process which avoids sticking and surface-induced mid-range error by floating hot glass substrates between a pair of porous air bearing mandrels through which compressed nitrogen is forced. We report on the design and testing of an improved air bearing slumping tool and show results of short and long slumping cycles. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Mark L. Schattenburg ; Brandon Chalifoux ; Michael D. DeTienne ; Ralf K. Heilmann and Heng Zuo
" Progress report on air bearing slumping of thin glass mirrors for x-ray telescopes ", Proc. SPIE 9603, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VII, 96030R (September 4, 2015); doi:10.1117/12.2189970; http://dx.doi.org/10.1117/12.2189970


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