Removal of Mid Spatial-Frequency Features in Mirror Segments
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.
Atomic, Molecular and Optical Physics | Computer-Aided Engineering and Design | Engineering | Engineering Physics | Manufacturing | Semiconductor and Optical Materials
Yu, G., Li, H. & Walker, D. (2011) "Removal of mid spatial-frequency features in mirror segments", Journal of the European Optical Society 11044 Vol 6.
Digital Commons Citation
Yu, Guoyu; Hongyu, Li; and Walker, David, "Removal of Mid Spatial-Frequency Features in Mirror Segments" (2011). Holography, Optics and Photonics. Paper 4.