Manufacture of Segments for Extremely Large Telescopes: a New Perspective

D. D. Walker, P. Shore

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

We consider the production-route for aspheric segments for extremely large telescopes. The classical stressed-mirror polishing route followed by ion-figuring is introduced, leading to consideration of a new route combining precision aspheric grinding with computer-controlled polishing. We present estimates of process times in the polishing and grinding phases, based on scaling previous experimental results, and outline the next stage of the process development project. We are optimistic that the new route will be capable of faster processing with reduced risk, and will free the telescope and enclosure designers from the dimensional constraints imposed by segment asphericity.

Original languageEnglish
Title of host publicationSecond Backaskog Workshop on Extremely Large Telescopes
EditorsArne L. Ardeberg, Torben Andersen
PublisherSPIE
Pages277-284
Number of pages8
Volume5382
ISBN (Print)9780819452993, 0819452998
DOIs
Publication statusPublished - 7 Jul 2004
Externally publishedYes
EventSecond Backaskog Workshop on Extremely Large Telescopes - Backaskog, Sweden
Duration: 9 Sep 200311 Sep 2003

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume5382
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSecond Backaskog Workshop on Extremely Large Telescopes
CountrySweden
CityBackaskog
Period9/09/0311/09/03

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Cite this

Walker, D. D., & Shore, P. (2004). Manufacture of Segments for Extremely Large Telescopes: a New Perspective. In A. L. Ardeberg, & T. Andersen (Eds.), Second Backaskog Workshop on Extremely Large Telescopes (Vol. 5382, pp. 277-284). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 5382). SPIE. https://doi.org/10.1117/12.566274