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Proceedings Paper

Cryogenic optical performance of a lightweighted mirror assembly for future space astronomical telescopes: correlating optical test results and thermal optical model
Author(s): Ron Eng; William R. Arnold; Markus A. Baker; Ryan M. Bevan; Gregory Burdick; Michael R. Effinger; Darrell E. Gaddy; Brian K. Goode; Craig Hanson; William D. Hogue; Jeffrey R. Kegley; Charlie Kirk; Steven P. Maffett; Gary W. Matthews; Richard D. Siler; W. Scott Smith; H. Philip Stahl; John M. Tucker; Ernest R. Wright
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Paper Abstract

A 43cm diameter stacked core mirror demonstrator was interferometrically tested at room temperature down to 250 degrees Kelvin for thermal deformation. The 2.5m radius of curvature spherical mirror assembly was constructed by low temperature fusing three abrasive waterjet core sections between two CNC pocket milled face sheets. The 93% lightweighted Corning ULE® mirror assembly represents the current state of the art for future UV, optical, near IR space telescopes. During the multiple thermal test cycles, test results of interferometric test, thermal IR images of the front face were recorded in order to validate thermal optical model.

Paper Details

Date Published: 30 September 2013
PDF: 13 pages
Proc. SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 88370B (30 September 2013); doi: 10.1117/12.2025393
Show Author Affiliations
Ron Eng, NASA Marshall Space Flight Ctr. (United States)
William R. Arnold, NASA Marshall Space Flight Ctr. (United States)
Markus A. Baker, NASA Marshall Space Flight Ctr. (United States)
Ryan M. Bevan, NASA Marshall Space Flight Ctr. (United States)
The Univ. of Alabama in Huntsville (United States)
Gregory Burdick, ITT Exelis (United States)
Michael R. Effinger, NASA Marshall Space Flight Ctr. (United States)
Darrell E. Gaddy, NASA Marshall Space Flight Ctr. (United States)
Brian K. Goode, NASA Marshall Space Flight Ctr. (United States)
Craig Hanson, ITT Exelis (United States)
William D. Hogue, NASA Marshall Space Flight Ctr. (United States)
Jeffrey R. Kegley, NASA Marshall Space Flight Ctr. (United States)
Charlie Kirk, ITT Exelis (United States)
Steven P. Maffett, ITT Exelis (United States)
Gary W. Matthews, ITT Exelis (United States)
Richard D. Siler, NASA Marshall Space Flight Ctr. (United States)
W. Scott Smith, NASA Marshall Space Flight Ctr. (United States)
H. Philip Stahl, NASA Marshall Space Flight Ctr. (United States)
John M. Tucker, NASA Marshall Space Flight Ctr. (United States)
Ernest R. Wright, NASA Marshall Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 8837:
Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems
Joseph L. Robichaud; Matthias Krödel; William A. Goodman, Editor(s)

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