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Proceedings Paper

Ultralightweight borosilicate Gas-Fusion mirror for cryogenic testing
Author(s): Michael Voevodsky; Richard W. Wortley
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Paper Abstract

This paper addresses a NASA Marshall Space Flight Center development contract for Hextek Corporation to produce a 250 mm ultra-lightweight borosilicate mirror blank for cryogenic testing to 30°K. Published data has shown borosilicate glass to be a highly stable material at extremely cold temperatures, with a lower cte (coefficient of thermal expansion) then Zerodur, ULE or fused silica. Hextek would use the cost effective and rapid production Gas-Fusion technology to fabricate a 15 kg/m2 substrate that would be figured and polished by NASA and tested cryogenically in the MSFC X-ray Calibration Facility. The expected payoff for NASA is the opportunity to prove out the performance for a substrate technology and mirror material that is capable of reducing cost, schedule and risk associated with the primary mirror in systems operating at cryogenic temperatures.

Paper Details

Date Published: 12 December 2003
PDF: 6 pages
Proc. SPIE 5179, Optical Materials and Structures Technologies, (12 December 2003); doi: 10.1117/12.506142
Show Author Affiliations
Michael Voevodsky, Hextek Corp. (United States)
Richard W. Wortley, Hextek Corp. (United States)


Published in SPIE Proceedings Vol. 5179:
Optical Materials and Structures Technologies
William A. Goodman, Editor(s)

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