Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 6, 2011
|
|
---|---|---|
Article Number | 11044 | |
Number of page(s) | 4 | |
DOI | https://doi.org/10.2971/jeos.2011.11044 | |
Published online | 02 September 2011 |
Regular papers
Removal of Mid Spatial-Frequency Features in Mirror Segments
1
Optic Glyndwr, Ffordd William Morgan, St Asaph, LL17 0JD, UK
2
University College London, Dept. of Physics and Astronomy, London, WC1E 6BT, UK
3
Zeeko Ltd, Coalville, Leicestershire, LE67 3FW, UK
Received:
20
July
2011
BoX™ grinding technology has been adopted in our E-ELT segment process. The mid-spatial frequency features generated can be removed by several ‘smoothing’ processes. We have reported here a novel method that can smooth these features whilst avoiding edge down-turn. This process can be scaled up to E-ELT segment fabrication time-scale. It has been experimentally demonstrated that the surface quality is good enough for subsequent Zeeko form correction technology to achieve form specifications.
Key words: segments / CNC polishing / mid-spatial frequency
© The Author(s) 2011. All rights reserved.
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