Cryogenic optical performance of a lightweighted mirror assembly for future space astronomical telescopes: correlating optical test results and thermal optical model

Ron Eng; William R. Arnold Sr.; 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

doi:10.1117/12.2025393

30 September 2013 Cryogenic optical performance of a lightweighted mirror assembly for future space astronomical telescopes: correlating optical test results and thermal optical model

Ron Eng, William R. Arnold Sr., 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

Author Affiliations +

Proceedings Volume 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems; 88370B (2013) https://doi.org/10.1117/12.2025393
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

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.

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Ron Eng, William R. Arnold Sr., 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, and Ernest R. Wright "Cryogenic optical performance of a lightweighted mirror assembly for future space astronomical telescopes: correlating optical test results and thermal optical model", Proc. SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 88370B (30 September 2013); https://doi.org/10.1117/12.2025393

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