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A preferential coating technique for fabricating large, high quality optics
DOI:
10.1016/j.nima.2009.10.097
Authors:
S. G.
Alcock
(Diamond Light Source)
,
S.
Cockerton
(Crystal Scientific (UK) Ltd)
Co-authored by industrial partner:
Yes
Type:
Journal Paper
Journal:
Nuclear Instruments And Methods In Physics Research A
, VOL 616
, PAGES 110114
State:
Published (Approved)
Published:
March 2010
Abstract: A major challenge facing optic manufacturers is the fabrication of large mirrors (>1 m) with minimal residual slope errors (<0.5 ?rad rms). We present a differential coating method with the potential to satisfy such exacting technical demands. Iterative cycles of measurement using the Diamond-NOM, followed by preferential deposition, were performed on a 1200 mm long, silicon mirror. The applied coatings were observed to reduce the optical slope and figure errors from 1.62 to 0.44 ?rad rms, and from 208 to 13 nm rms, respectively. It is hoped that this research will lead to commercially available products, of direct benefit to the Synchrotron, Free Electron Laser, Astronomy, Space, and Laser communities, who all require state-of-the-art optics.
Journal Keywords: Astronomy; Coatings; Deposition; Diamonds; Errors; Fabrication; Free Electron Lasers; Iterative Methods; Mirrors; Optics; Silicon; Synchrotrons
Subject Areas:
Physics
Technical Areas:
Optics
Added On:
16/04/2010 12:19