期刊
INFRARED PHYSICS & TECHNOLOGY
卷 75, 期 -, 页码 18-21出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.infrared.2015.12.028
关键词
Multi-layers antireflection coating; Zinc sulphide; Germanium; Hardness
资金
- Isfahan University Of Technology (IUT)
We have designed, fabricated and characterized a multi-layers antirefiection coating on multispectral ZnS substrate, suitable for the infrared range of 8-12 mu m. The 4-layers coating (Ge/ZnS/Ge/ZnS) with optimized thicknesses was fabricated by PVD technique and studied by FTIR, nanoindentation and AFM. From FTIR spectroscopy it was found that, in the wavelength range of 8-12 mu m, the average transmittance of the double-side coated sample increases by about 26% and its maximum reaches about 98%. To improve the mechanical hardness, a bilayer of Y2O3/carbon was deposited on the coating. Nanoindentation test shows that the coating enhances the mechanical properties. The final coating have successfully passed durability and environmental tests. (C) 2016 Elsevier B.V. All rights reserved.
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