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KMID : 1011420200250030307
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Journal of Korean Ophthalmic Optics Society
2020 Volume.25 No. 3 p.307 ~ p.314
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Fabrication and Characterization of Coated Blue-Light Blocking Lens
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Park Moon-Chan
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Abstract
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Purpose: The coated blue-light blocking (CBB) lenses were fabricated to study the characteristics changes occurring in the blocking rate at the 450-nm peak wavelength.
Methods: After designing the CBB lenses using the Essential Macleod program, they were manufactured using an electron beam evaporation apparatus. The blue-light blocking rate, transmittance, luminous transmittance, and colors of the reflected and transmitted light were obtained from the transmittance curve of the CBB lenses. In addition, the structure and composition of the coatings on these lenses were analyzed through XPS.
Results: For the 450-nm peak wavelength blocking rates of 10%, 20%, 40%, and 60%, the CBB lenses had 16, 18, 26, and 32 layers with blue-light blocking rates of 4.9%, 8.8%, 17.2%, and 25.7%, transmittances of 95.8%, 94.6%, 92.7%, and 90.7%, and luminous transmittances of 99.5%, 98.9%, 98.5%, and 98.0%, respectively. In addition, the color of the transmitted light shifted from transparent to pale yellow with the increase in blue-light blocking rates, and the color of the reflected light gradually changed from blue to dark blue. The XPS analysis verified the consistency of layer thicknesses and components of the CBB lenses with the design values; the Ti3O5 layer was composed of TiO2 and Ti3O5.
Conclusions: As the blue-light blocking rate of the CBB lenses increased, the number of coating layers was increased, the luminous transmittance slightly decreased, the color of the transmitted light shifted from transparent to pale yellow, and the color of the reflected light gradually darkened from blue.
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KEYWORD
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Blue-light blocking lens, Blue-light blocking rate, Luminous transmittance, CIE chromaticity diagram
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