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Optical characterisation of silver mirrors protected with transparent overcoats

: Sytchkova, A.; Schwinde, S.; Protopapa, M.L.; Palmisano, M.; Piegari, A.; Schürmann, M.; Kaiser, N.


Lequime, Michel (Ed.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Advances in Optical Thin Films VI : 14-17 May 2018, Frankfurt, Germany
Bellingham, WA: SPIE, 2018 (Proceedings of SPIE 10691)
ISBN: 978-1-5106-1919-7
ISBN: 978-1-5106-1920-3
Paper 106910N, 6 S.
Conference "Advances in Optical Thin Films" <6, 2018, Frankfurt>
Fraunhofer IOF ()

Time durability and environmental stability of silver-coated glass mirrors improve if silver layer is protected by a transparent thin film coating. The choice of the protecting layer material and of the methods for mirror manufacturing influences the mirror optical and mechanical properties. This work reports on a systematic study of silver mirrors overcoated by silicon oxide, nitride and oxy-nitrides. Variable angle spectroscopic ellipsometry was implemented to get an insight on metal-dielectric interface of the coatings. The results have been analyzed considering the coating deposition conditions and physical-chemical properties of the dielectric materials used as protective layers.