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Proceedings Paper

Replication as an alternative approach for large segmented telescopes
Author(s): Melville P. Ulmer; Robert I. Altkorn; Edward D. Kibblewhite; Steve Varlese
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Paper Abstract

The next generation of optical/IR telescopes will require large numbers of co-phased segmented mirrors. Therefore, some form of replication technology is desirable to reduce costs. Electroforming has the advantage that it is a commercially developed technology for replication, and the technology has been widely used for making X-ray mirrors (e.g. XMM-Newton). Composite materials are appealing, since a great deal of development work as been done with composites as well. There are 3 areas that need to be addressed: replication with minimal stress so as to produce a high quality figure; attachment of support of the mirror segment so as to maintain the figure quality; and, thermal control requirements. Here we present a discussion of the requirements that lead us to select replication as the fabrication technology and the advantages of replication. We report on our first results of making a concave mirror and testing support methods of flats.

Paper Details

Date Published: 4 February 2003
PDF: 9 pages
Proc. SPIE 4837, Large Ground-based Telescopes, (4 February 2003); doi: 10.1117/12.456663
Show Author Affiliations
Melville P. Ulmer, Dearborn Observatory/Northwestern Univ. (United States)
Robert I. Altkorn, Dearborn Observatory/Northwestern Univ. (United States)
Edward D. Kibblewhite, Univ. of Chicago (United States)
Steve Varlese, Ball Aerospace & Technologies Corp. (United States)

Published in SPIE Proceedings Vol. 4837:
Large Ground-based Telescopes
Jacobus M. Oschmann; Larry M. Stepp, Editor(s)

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