| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 6, 2011
|
|
|---|---|---|
| Article Number | 11048 | |
| Number of page(s) | 6 | |
| DOI | https://doi.org/10.2971/jeos.2011.11048 | |
| Published online | 09 November 2011 | |
Regular papers
Modelling and measurement of polishing tool influence functions for edge control
1
University College London, Dept. of Physics and Astronomy, London, WC1E 6BT, UK
2
Optic Glyndwr, Ffordd William Morgan, St Asaph, LL17 0JD UK
3
Zeeko Ltd, Coalville, Leicestershire, LE67 3FW
Received:
26
July
2011
We present progress on our development of edge control for fabrication of mirror segments potentially for the European Extremely Large Telescope (E-ELT). Zeekoś Bonnet polishing technology has been adopted to achieve the form correction target. Like other Computer Numerical Controlled (CNC) polishing, accurate and stable tool Influence Functions (IFs) are important. Particular challenges arisen when polishing up to edges where the geometry of the IFs created by a bonnet changes. We described a model based on measured IFs data that allowed us accurately to predict the edge profile. To obtain IFs at the edge, data from interferometers and profilometers have been stitched. Numerical models with empirical Ifs as input data have been used to predict edge profiles with some preliminary success.
Key words: CNC polishing / segments / edge control / modeling
© The Author(s) 2011. All rights reserved.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.