Replication as an alternative approach for large segmented telescopes

Melville P. Ulmer; Michael Edward Graham; Semyon Vanyman; Steven J. Varlese; Dean Baker

doi:10.1117/12.566322

7 July 2004 Replication as an alternative approach for large segmented telescopes

Melville P. Ulmer; Michael Edward Graham; Semyon Vanyman; Steven J. Varlese; Dean Baker

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Proceedings Volume 5382, Second Backaskog Workshop on Extremely Large Telescopes; (2004) https://doi.org/10.1117/12.566322
Event: Second Backaskog Workshop on Extremely Large Telescopes, 2003, Backaskog, Sweden

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.

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Melville P. Ulmer, Melville P. Ulmer, Michael Edward Graham, Michael Edward Graham, Semyon Vanyman, Semyon Vanyman, Steven J. Varlese, Steven J. Varlese, Dean Baker, Dean Baker, } "Replication as an alternative approach for large segmented telescopes", Proc. SPIE 5382, Second Backaskog Workshop on Extremely Large Telescopes, (7 July 2004); doi: 10.1117/12.566322; https://doi.org/10.1117/12.566322

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