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Proceedings Article

Optical metrology for very large convex aspheres

[+] Author Affiliations
J. H. Burge, P. Su, C. Zhao

College of Optical Sciences, Univ. of Arizona (United States)

Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 701818 (July 14, 2008); doi:10.1117/12.790063
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From Conference Volume 7018

  • Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
  • Eli Atad-Ettedgui; Dietrich Lemke
  • Marseille, France | June 23, 2008

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.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

J. H. Burge ; P. Su and C. Zhao
"Optical metrology for very large convex aspheres", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 701818 (July 14, 2008); doi:10.1117/12.790063; http://dx.doi.org/10.1117/12.790063


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