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Comparison of Properties of Polymer Based Glass Lenses by Chemical Etching Reaction  

Lee, Junghwa (Dept. of Optometry, Seoul National University of Science and Technology)
Noh, Hyeran (Dept. of Optometry, Seoul National University of Science and Technology)
Publication Information
Journal of Korean Ophthalmic Optics Society / v.17, no.2, 2012 , pp. 119-126 More about this Journal
Abstract
Purpose: To study changes in coating and lens materials after chemically etched different polymer based glass lenses in short-term and ambient condition using hydrofluoric acid. Methods: Vinyl ester polymer (Lens A) and thiourethane polymer (Lens B), both dyed in gray 70%, were etched in hydrofluoric acid solution for 5, 10, or 15 min. The mechanical properties, degrees of damages in hard coating, anti-reflection coating, and other coatings, rates of refractive index and light transmission of both polymer types were evaluated. Results: Rates of refractive index of both lens types were not changed significantly after chemical etching. However, anti-reflection coatings and hard coatings were removed and lens surfaces were damaged. As a results, UV light transmission of lenses increased and mechanical properties decreased. Chemical etching notably changed various properties of thiourethane polymer materials. Conclusions: Depending on types of polymer materials, chemical reactions by hydrofluoric acid were dissimilar. Thus, various properties of les materials were altered differently.
Keywords
Glass lens materials; Polymer lens; Lens etching; Polymer corrosion; Coating corrosion;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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