Manufacture of segments for extremely large telescopes: A new perspective

D. D. Walker, P. Shore

Research output: Contribution to journalConference article

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.

LanguageEnglish
Pages277-284
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5382
DOIs
Publication statusPublished - 7 Jul 2004
Externally publishedYes
EventSecond Backaskog Workshop on Extremely Large Telescopes - Backaskog Castle, Sweden
Duration: 9 Sep 200311 Sep 2003

Fingerprint

Extremely Large Telescopes
Polishing
Telescopes
Grinding
routes
polishing
telescopes
grinding
Asphericity
Enclosure
asphericity
Enclosures
Development Process
Telescope
Mirror
Mirrors
enclosure
Scaling
Ions
Experimental Results

Cite this

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Manufacture of segments for extremely large telescopes : A new perspective. / Walker, D. D.; Shore, P.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5382, 07.07.2004, p. 277-284.

Research output: Contribution to journalConference article

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