Removal of Mid Spatial-Frequency Features in Mirror Segments

Yu, G., Li, H. and Walker, D.D. (2011) Removal of Mid Spatial-Frequency Features in Mirror Segments. Journal of the European Optical Society: Rapid Publications, 6 (ARTN 1). ISSN 1990-2573

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Abstract

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

Item Type:	Article
Uncontrolled Keywords:	segments, CNC polishing, mid-spatial frequency
Subjects:	T Technology > TS Manufactures
Schools:	School of Computing and Engineering School of Computing and Engineering > Centre for Precision Technologies
Related URLs:	Author
Depositing User:	Catherine Parker
Date Deposited:	29 Nov 2016 17:06
Last Modified:	01 Apr 2018 15:01
URI:	http://eprints.hud.ac.uk/id/eprint/30408

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