Journal of the European Optical Society - Rapid publications, Vol 8 (2013)

Polishing of optical media by dielectric barrier discharge inert gas plasma at atmospheric pressure

C. Gerhard, T. Weihs, A. Luca, S. Wieneke, W. Viöl

Abstract


In this paper, surface smoothing of optical glasses, glass ceramic and sapphire using a low-power dielectric barrier discharge inert gas plasma at atmospheric pressure is presented. For this low temperature treatment method, no vacuum devices or chemicals are required. It is shown that by such plasma treatment the micro roughness and waviness of the investigated polished surfaces were significantly decreased, resulting in a decrease in surface scattering. Further, plasma polishing of lapped fused silica is introduced. Based on simulation results, a plasma physical process is suggested to be the underlying mechanism for initialising the observed smoothing effect.

© The Authors. All rights reserved. [DOI: 10.2971/jeos.2013.13081]

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