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Proceedings Paper

Replication as an alternative approach for large segmented telescopes
Author(s): Melville P. Ulmer; Michael Edward Graham; Semyon Vanyman; Steven J. Varlese; Dean Baker
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Paper Abstract

The next generation of optical/IR telescopes will require large numbers of co-phased mirror segments. 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 has 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; 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 and flat mirrors.

Paper Details

Date Published: 7 July 2004
PDF: 8 pages
Proc. SPIE 5382, Second Backaskog Workshop on Extremely Large Telescopes, (7 July 2004); doi: 10.1117/12.566322
Show Author Affiliations
Melville P. Ulmer, Northwestern Univ. (United States)
Michael Edward Graham, Northwestern Univ. (United States)
Semyon Vanyman, Northwestern Univ. (United States)
Steven J. Varlese, Ball Aerospace & Technologies Corp. (United States)
Dean Baker, Advanced Powder Solutions/Hardface Alloys, Inc. (United States)


Published in SPIE Proceedings Vol. 5382:
Second Backaskog Workshop on Extremely Large Telescopes
Arne L. Ardeberg; Torben Andersen, Editor(s)

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