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Proceedings Paper

Fabrication Of The Keck Ten Meter Telescope Primary Mirror
Author(s): Terry S. Mast; Jerry E. Nelson
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Paper Abstract

The University of California and the California Institute of Technology are collaborating to build and operate the Keck Ten Meter Telescope and Observatory. The telescope will be a ten-meter diameter, ground-based, astronomical telescope for observations at visible and infrared wavelengths. The telescope primary mirror is a mosaic of thirty-six hexagonal segments, each 1.8m in diameter. Piston and tilt in two directions of each segment are actively con-trolled by computer. The fabrication of the segments is a major challenge. The material must be stable under gravitational and ther-mal perturbations. Each segment has a surface shape that is the off-axis section of the parent hyperboloid and this surface shape is difficult to achieve with conventional polishing methods. In this paper we describe in detail the proposed segments and we describe the theoretical basis of the method proposed for achieving the segment figure, Stressed Mirror Polishing.

Paper Details

Date Published: 22 October 1985
PDF: 12 pages
Proc. SPIE 0542, Optical Fabrication & Testing Workshop, (22 October 1985); doi: 10.1117/12.948162
Show Author Affiliations
Terry S. Mast, University of California (United States)
Jerry E. Nelson, University of California (United States)

Published in SPIE Proceedings Vol. 0542:
Optical Fabrication & Testing Workshop
Robin S. McDowell, Editor(s)

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