Dimensional metrology of mirror segments for extremely-large telescopes

Graham Peggs, Richard May-Miller, David Walker, Eli Atad, Paul Shore, David Smith

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Metrology is critical amongst the challenges associated with the production of mirror segments on the scale required by proposed extremely-large telescopes. To achieve the optical specification in a reasonable time requires measurements with an unprecedented combination of accuracy, stability and speed. This study suggests combining several promising methods for use at different stages of production. Pallet mounting is proposed to permit the segments to be handled without significant distortion and to provide fiducials for precise location of the segment. Final qualification of a segment would include comparison with a master reference that had been certified by consensus among a number of independent experts.

Original languageEnglish
Title of host publicationSecond Backaskog Workshop on Extremely Large Telescopes
EditorsArne L. Ardeberg, Torben Anderson
Number of pages5
ISBN (Print)0819452998, 9780819452993
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
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSecond Backaskog Workshop on Extremely Large Telescopes

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