7 September 1999 PICVD: a novel technique for hard- and AR coating of spectacles
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Abstract
PICVD is used for providing organic spectacles with a protective hardcoat, an antireflective multilayer and a hydrophobic top coat. The hardcoat, low index material in the antireflective stack and the hydrophobic film are derived from the same silicon precursor, different layer properties can be achieved by tuning of the plasma parameters. For the high index material, TiO2 is used. The coating performances of Carl Zeiss Carat Carat-coating can readily be achieved. In contrast to standard batch coaters, allowing to coat up to 100 spectacles at a time, the PICVD technique uses a single station design: the spectacles are coated in a single reactor each at a time. This single station concept result in cost effective coating processes and allows furthermore to reduce the turn-around time of the coating service dramatically: almost one day can be saved compared to the mainstream procedure, comprising of hardcoating with lacquer, post bake, washing and batch coating of AR stack, respectively. Optical and mechanical properties of the low index films depend strongly on the oxygen content of the precursor. Measurements of the films' refractive index and hardness are presented and conclusions for optimizing the hardcoat and the low index film are drawn.
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Matthias Schiller, Matthias Schiller, Markus Kuhr, Markus Kuhr, Michael Witzany, Michael Witzany, } "PICVD: a novel technique for hard- and AR coating of spectacles", Proc. SPIE 3738, Advances in Optical Interference Coatings, (7 September 1999); doi: 10.1117/12.360084; https://doi.org/10.1117/12.360084
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