Design of a nanometer-accurate form measurement machine for segmented large telescope mirrors
conference paper
The planned extremely large telescope observatories with segmented giant primary mirrors will require metrology with nanometer accuracy. The two extremely large ground telescopes, the European Extremely Large Telescope (E-ELT [2]) and Thirty Meter Telescope (TMT [3]), feature telescopes with 39 meter and 30 meter primary mirrors (M1), respectively. The E-ELT consists of 798 hexagonal segments, while the TMT consists of 492 hexagonal segments. The segments of both telescopes are approximately 1.5 m from corner to corner. This paper describes the preliminary design of a measurement machine for these segments.
TNO Identifier
534072
ISBN
9781887706698
Publisher
American Society for Precision Engineering ASPE
Source title
30th Annual Meeting of the American Society for Precision Engineering, ASPE 2015, 1-6 November 2015, Austin, TX, USA
Collation
5 p.
Pages
131-135
Files
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