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Proceedings Paper

Stressed-lap polishing of 3.5-m f/1.5 and 1.8-m f/1.0 mirrors
Author(s): David S. Anderson; James Roger P. Angel; James H. Burge; Warren B. Davison; Scott T. DeRigne; B. B. Hille; Dean A. Ketelsen; W. Cary Kittrell; Hubert M. Martin; Robert H. Nagel; Thomas J. Trebisky; Steve C. West; R. S. Young
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Paper 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.

Paper Details

Date Published: 1 January 1992
PDF: 10 pages
Proc. SPIE 1531, Advanced Optical Manufacturing and Testing II, (1 January 1992); doi: 10.1117/12.134867
Show Author Affiliations
David S. Anderson, Steward Observatory/Univ. of Arizona (United States)
James Roger P. Angel, Steward Observatory/Univ. of Arizona (United States)
James H. Burge, Steward Observatory/Univ. of Arizona (United States)
Warren B. Davison, Steward Observatory/Univ. of Arizona (United States)
Scott T. DeRigne, Steward Observatory/Univ. of Arizona (United States)
B. B. Hille, Steward Observatory/Univ. of Arizona (United States)
Dean A. Ketelsen, Steward Observatory/Univ. of Arizona (United States)
W. Cary Kittrell, Steward Observatory/Univ. of Arizona (United States)
Hubert M. Martin, Steward Observatory/Univ. of Arizona (United States)
Robert H. Nagel, Steward Observatory/Univ. of Arizona (United States)
Thomas J. Trebisky, Steward Observatory/Univ. of Arizona (United States)
Steve C. West, Steward Observatory/Univ. of Arizona (United States)
R. S. Young, Steward Observatory/Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 1531:
Advanced Optical Manufacturing and Testing II
Victor J. Doherty, Editor(s)

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