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KMID : 1011420140190010001
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Journal of Korean Ophthalmic Optics Society
2014 Volume.19 No. 1 p.1 ~ p.8
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Changes of Thin Film Coating on Polymer Lenses with Varying Temperature
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Noh Hye-Ran
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Abstract
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Purpose: To observe changes of coatings and lens materials with varying temperature to understand effect of temperature on plastic lens.
Methods: In this study, three lenses of different refractive indices (2 of thiourethane oriented lenses, an allyl diglycol carbonate oriented lens) were exposed to high temperature (50, 80, and 100 degree) for 5 hours and changes of individual coating (anti-refractive coating, hard coating, and water repellent coating) were measured.
Results: As a result, high-refractive index lenses did not exhibit significant variation of hardness. However, hardness of mid-refractive index lens were decreased when exposed to high temperature and destructions of hard coating layer was inferred. Surface contact angles of lens were decreased with increasing temperature and water repellent coating layer were damaged at higher than 80 degree.
Conclusions: Multi including water repellent coatings on all three lenses with different refractive indices were damaged when exposed to at or higher than 80 degree. The degree of changes in mechanical and physical properties were depended on polymer material type.
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KEYWORD
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Plastic lens, Polymer lens, Lens coating, Multi coating, Water repellent coating
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