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Proceedings Paper

Design of a manufacturing facility for 8- to 10-m class mirrors
Author(s): Michael H. Krim
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Paper Abstract

There is considerable interest and excitement in the astronomical community about the near-term realization of 8 to 10 meter class telescopes. In this paper we will describe the design of a polishing shop uniquely configured to acconmiodate these mirrors. Simply stated, these mirrors are very large, very heavy, and very flexible compared to existing telescope designs. Large implies long path length metrology and the control of vibration as well as the need for vacuum to eliminate air turbulence. It also implies a significant investment of time and money and therefore, safety is a paramount design parameter. Heavy introduces in-process handling concerns, an always present safety issue. Flexibility, whether a thin solid or structured approach is employed for the mirror blank, requires that some form of active shape control be employed to maintain figure in the presence of gravity. This can be exploited to relax the figure requirements in the long spatial period regime which has significant implications on the type of machinery that will be needed to figure and polish the optic. We will describe in this paper how the facility design addresses these issues.

Paper Details

Date Published: 1 July 1990
PDF: 8 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19245
Show Author Affiliations
Michael H. Krim, Hughes Danbury Optical Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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