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Proceedings Paper

Fabrication of ultrathin mirrors for adaptive and space optics
Author(s): Stephen M. Miller; James Roger P. Angel; Hubert M. Martin; John Kapp; Dean A. Ketelsen; Lee R. Dettmann
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Paper Abstract

We describe the optical fabrication of thin glass shells which will be combined with rigid active supports for adaptive secondary mirrors and for space optics. These applications require glass shells about 2 mm thick, with diameters up to about 1 m for adaptive optics and possibly 6 m for space optics. The extreme flexibility presents unique fabrication challenges which are overcome by a simple adaptation of traditional glassworking techniques. Here we describe the fabrication of concave spherical shells 20 cm and 55 cm diameter. A method of handling and supporting the thin substrates for loose abrasive grinding and polishing is demonstrated and some variations on this approach are compared. Extension of the technique to aspheric adaptive secondary mirrors and to ultra-light mirrors up to 6 meters in diameter is discussed. The subsequent integration and optical testing of a 55 cm shell with a 36 point active support is reported.

Paper Details

Date Published: 17 October 1997
PDF: 6 pages
Proc. SPIE 3126, Adaptive Optics and Applications, (17 October 1997); doi: 10.1117/12.279049
Show Author Affiliations
Stephen M. Miller, Univ. of Arizona Steward Observatory (United States)
James Roger P. Angel, Univ. of Arizona Steward Observatory (United States)
Hubert M. Martin, Univ. of Arizona Steward Observatory (United States)
John Kapp, Univ. of Arizona Steward Observatory (United States)
Dean A. Ketelsen, Univ. of Arizona Steward Observatory (United States)
Lee R. Dettmann, Univ. of Arizona Steward Observatory (United States)

Published in SPIE Proceedings Vol. 3126:
Adaptive Optics and Applications
Robert K. Tyson; Robert Q. Fugate, Editor(s)

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