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Proceedings Paper

Optical metrology for very large convex aspheres
Author(s): J. H. Burge; P. Su; C. Zhao
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Paper Abstract

Telescopes with very large diameter or with wide fields require convex secondary mirrors that may be many meters in diameter. The optical surfaces for these mirrors can be manufactured to the accuracy limited by the surface metrology. We have developed metrology systems that are specifically optimized for measuring very large convex aspheric surfaces. Large aperture vibration insensitive sub-aperture Fizeau interferometer combined with stitching software give high resolution surface measurements. The global shape is corroborated with a coordinate measuring machine based on the swing arm profilometer.

Paper Details

Date Published: 25 July 2008
PDF: 12 pages
Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 701818 (25 July 2008); doi: 10.1117/12.790063
Show Author Affiliations
J. H. Burge, College of Optical Sciences, Univ. of Arizona (United States)
P. Su, College of Optical Sciences, Univ. of Arizona (United States)
C. Zhao, College of Optical Sciences, Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 7018:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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