Characterization of inhomogeneous films formed by co-evaporation of ZnSe and MgF2

Fang Chung Ho; Chii Hua Lee; Rung-Ywan Tsai

doi:10.1117/12.163549

2 November 1993 Characterization of inhomogeneous films formed by co-evaporation of ZnSe and MgF₂

Fang Chung Ho, Chii Hua Lee, Rung-Ywan Tsai

Proceedings Volume 2046, Inhomogeneous and Quasi-Inhomogeneous Optical Coatings; (1993) https://doi.org/10.1117/12.163549
Event: Optics Quebec, 1993, Quebec City, Canada

Abstract

Optical and physical properties of MgF₂, ZnSe, and composite ZnSe-MgF₂ films deposited by co-evaporation of ZnSe and MgF₂ on glass substrates at elevated temperatures are studied. MgF₂ films deposited on glass substrates at temperature of 200 degree(s)C were found durable, resistant to wet environment, high in film packing density, and having a very reproducible refractive index of 1.38 to 0.75 micrometers . ZnSe films formed under same substrate conditions were also found dense and reproducible. The refractive indices of these films were determined to be 2.50 +/- 0.01 at 0.75 micrometers . The adhesion of the films to the substrate declined drastically in hot and wet environment. Composite films deposited on glass substrate at 200 degree(s)C by co-evaporation of ZnSe and MgF₂ with selected individual evaporation rates were observed to be uniform, durable, and enhanced in protection against hazardous environments.

Citation Download Citation

Fang Chung Ho, Chii Hua Lee, and Rung-Ywan Tsai "Characterization of inhomogeneous films formed by co-evaporation of ZnSe and MgF₂", Proc. SPIE 2046, Inhomogeneous and Quasi-Inhomogeneous Optical Coatings, (2 November 1993); https://doi.org/10.1117/12.163549

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