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Proceedings Article

Stressed-lap polishing of 3.5-m f/1.5 and 1.8-m f/1.0 mirrors

[+] Author Affiliations
David S. Anderson, James Roger P. Angel, James H. Burge, Warren B. Davison, Scott T. DeRigne, B. B. Hille, Dean A. Ketelsen, W. C. Kittrell, Hubert M. Martin, Robert H. Nagel, Thomas J. Trebisky, Steve C. West, R. S. Young

Steward Observatory/Univ. of Arizona (USA)

Proc. SPIE 1531, Advanced Optical Manufacturing and Testing II, 260 (January 1, 1992); doi:10.1117/12.134867
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From Conference Volume 1531

  • Advanced Optical Manufacturing and Testing II
  • Victor J. Doherty
  • | February 01, 1991

abstract

The stressed-lap polishing technique has been developed to meet the challenge of polishing 8- m-class mirrors with highly aspheric figures to an accuracy consistent with the best ground- based telescope sites. The method is currently being demonstrated in the polishing of two primary mirrors, a 1.8-m f/1.0 ellipsoid and a 3.5-m f/1.5 paraboloid. The figure accuracies achieved at the time of writing are 43 nm rms surface error for the 1.8-m mirror, and 190 nm rms surface error for the 3.5-m mirror. Polishing is proceedings on both mirrors. In this paper we describe the process used for the 3.5-m mirror and the progress through the early stages of fabrication. We also summarize progress on the 1.8-m mirror.

© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

David S. Anderson ; James Roger P. Angel ; James H. Burge ; Warren B. Davison ; Scott T. DeRigne, et al.
"Stressed-lap polishing of 3.5-m f/1.5 and 1.8-m f/1.0 mirrors", Proc. SPIE 1531, Advanced Optical Manufacturing and Testing II, 260 (January 1, 1992); doi:10.1117/12.134867; http://dx.doi.org/10.1117/12.134867


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