Removal of mid spatial-frequency features in mirror segments

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24 Citations (Scopus)


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.

Original languageEnglish
Article number11044
Number of pages1
JournalJournal of the European Optical Society
Publication statusPublished - 1 Jan 2011
Externally publishedYes


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