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Improved scratch resistance for antireflective coatings on sapphire

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Abstract

Antireflective coatings on sapphire were optimized by variation of the coating design, the total thickness, and the highly refractive material used. The coatings were characterized with a focus on their scratch resistance. An increased resistance against scratching wear is shown for hafnia-containing coatings with a total thickness of about 500nm.

© 2011 Optical Society of America

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