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Improved scratch resistance for antireflective coatings on sapphire

: Gödeker, C.; Schulz, U.; Kaiser, N.


Applied optics 50 (2011), No.9, pp.C253-C256
ISSN: 0003-6935
ISSN: 1539-4522
ISSN: 1559-128X
Journal Article
Fraunhofer IOF ()

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 500 nm.