Technologies for producing segments for Extremely Large Telescopes

D. Walker, C. Atkins, I. Baker, R. Evans, S. Hamidi, P. Harris, H. Li, W. Messelink, J. Mitchell, M. Parry-Jones, P. Rees, G. Yu

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

8 Citations (Scopus)

Abstract

We describe progress on a novel process-chain being used to produce eight 1.4m hexagonal segments as prototypes for the European Extremely Large Telescope - a Master Spherical Segment as a reference, and seven aspheric segments. A new pilot plant integrates a bespoke full-aperture test-tower designed and built by OpTIC Glyndŵr, with a Zeeko 1.6m polishing machine. The process chain starts with aspherising hexagonal segments on the Cranfield BoX™ grinder, followed by smoothing, corrective-polishing and edge-rectification using the Zeeko CNC platform. The paper describes the technology and progress, and anticipates how the process-chain is expected to evolve through the seven segments to increase both process-speed and surface-quality.

Original languageEnglish
Title of host publicationOptical Manufacturing and Testing IX
Volume8126
DOIs
Publication statusPublished - 28 Nov 2011
Externally publishedYes
EventOptical Manufacturing and Testing IX - San Diego, United States
Duration: 20 Aug 201122 Aug 2011
Conference number: IX
https://spie.org/OPO/conferencedetails/optical-manufacturing-and-testing (Link to Conference Details )

Conference

ConferenceOptical Manufacturing and Testing IX
CountryUnited States
CitySan Diego
Period20/08/1122/08/11
Internet address

Fingerprint

Polishing machines
Extremely Large Telescopes
Grinding mills
Polishing
Pilot plants
Telescopes
Towers
Surface properties
telescopes
Hexagon
Zone of one base
polishing
Rectification
Surface Quality
pilot plants
Smoothing
Optics
towers
rectification
smoothing

Cite this

Walker, D., Atkins, C., Baker, I., Evans, R., Hamidi, S., Harris, P., ... Yu, G. (2011). Technologies for producing segments for Extremely Large Telescopes. In Optical Manufacturing and Testing IX (Vol. 8126). [812604] https://doi.org/10.1117/12.893360
Walker, D. ; Atkins, C. ; Baker, I. ; Evans, R. ; Hamidi, S. ; Harris, P. ; Li, H. ; Messelink, W. ; Mitchell, J. ; Parry-Jones, M. ; Rees, P. ; Yu, G. / Technologies for producing segments for Extremely Large Telescopes. Optical Manufacturing and Testing IX. Vol. 8126 2011.
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Walker, D, Atkins, C, Baker, I, Evans, R, Hamidi, S, Harris, P, Li, H, Messelink, W, Mitchell, J, Parry-Jones, M, Rees, P & Yu, G 2011, Technologies for producing segments for Extremely Large Telescopes. in Optical Manufacturing and Testing IX. vol. 8126, 812604, Optical Manufacturing and Testing IX, San Diego, United States, 20/08/11. https://doi.org/10.1117/12.893360

Technologies for producing segments for Extremely Large Telescopes. / Walker, D.; Atkins, C.; Baker, I.; Evans, R.; Hamidi, S.; Harris, P.; Li, H.; Messelink, W.; Mitchell, J.; Parry-Jones, M.; Rees, P.; Yu, G.

Optical Manufacturing and Testing IX. Vol. 8126 2011. 812604.

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

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Walker D, Atkins C, Baker I, Evans R, Hamidi S, Harris P et al. Technologies for producing segments for Extremely Large Telescopes. In Optical Manufacturing and Testing IX. Vol. 8126. 2011. 812604 https://doi.org/10.1117/12.893360