Abstract

A method for the synthesis of beamsplitter coatings with different widths of operating spectral range and different ratios of transmittance T and reflectance R is presented. An example of beamsplitter calculation with the ratio T:R=60%∶40% for zinc selenide optical components is demonstrated in the spectral range of 2–10 μm. It is shown that the introduction of a diamond-like carbon layer with a thickness of not less than 100 nm at the interface with air makes it possible to obtain stable beamsplitter coatings with high mechanical strength and moisture resistance. The average values of transmittance and reflectance are 60.5% and 39.2%, respectively, for the samples in the range of 2–10 μm, and the maximum deviation is 3.8%.

© 2018 Optical Society of America

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