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KMID : 1159320150170040453
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Korean Journal of Vision Science
2015 Volume.17 No. 4 p.453 ~ p.460
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Study on anti-reflective coating of three multilayer on Ophthalmic lens including a nanostructure film
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Park Moon-Chan
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Abstract
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Purpose: The antireflection film coated three multilayer including a nanostructure on Ophthalmic lens with no curvature was studied.
How: Al2O3/ZrO2/Al2O3 on hard-coating film and nano-structure made nano-cylindrical hole in the top Al2O3 layer were designed on the lens. The best anti-reflective coating was found by observing the reflection spectrum according to the radius, height, period of the nano-cylindrical hole and the thickness of the ZrO2 layer.
Result: The radii of the nano-cylindrical holes were changed while the depth and the period were fixed. The reflectance was close to 0% in the radius of 70 nm where the position of wavelength was at 450 nm to 650 nm. The heights of the nano-cylindrical holes were changed while the radius and the period were fixed. The reflectance spectrum revealed that the height of the nano-cylindrical hole was optimal at about 100 nm. In addition, the period and the radius of the nano-cylindrical hole were changed. The reflectance spectrum gave the best in the period 200 nm or less. It was found that the anti-reflection film coating was optimal at the thickness of 130 nm in ZrO2.
Conclusion: The anti-reflection coating consisted of Al2O3/ZrO2/Al2O3 film with nano-layer on the spectacle lens was studied, and the optimal reflectance spectrum was found at the radius of 70 nm, at the height of 100 nm, at the period of below 200 nm. In addition, the optimal reflectance spectrum was found at a the ZrO2 thickness of 130 nm.
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KEYWORD
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nanostructure, Al2O3/ZrO2/Al2O3, anti-reflective coating film, FDTD
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