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http://dx.doi.org/10.21289/KSIC.2019.22.5.467

Proposed Approaches on Durability Enhancement of Small Structure fabricated on Camera Lens Surface  

Park, Hong Ju (Dept. of optics and mechatronics engineering, Pusan National University)
Choi, In Beom (Dept. of optics and mechatronics engineering, Pusan National University)
Kim, Doo-In (Opto-mechatronics Research Institute, Pusan National University)
Jeong, Myung Yung (Dept. of optics and mechatronics engineering, Pusan National University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.22, no.5, 2019 , pp. 467-473 More about this Journal
Abstract
In this study, approached to improve durability of the multi-functional nano-pattern fabricated on the curved lens surface using nanoimprint lithography (NIL) was proposed, and the effects of the proposed methods on functionality after wear test were examined. To improve the mechanical property of ultraviolet(UV)-curable resin, UV-NIL was conducted at the elevated temperature around $60^{\circ}C$. In addition, micro/nano hierarchical structures was fabricated on the lens surface with a durable film mold. Analysis on the worn surfaces of nano-hole pattern and hierarchical structures and measurements on the static water contact angle and critical water volume for roll-off indicated that the UV curing process with elevated temperature is effective to maintain wettability by increasing hardness of resin. Also, it was found that the micro-scale pattern is effective to protect nano-pattern from damage during wear test.
Keywords
Heat treatment; Hierarchical structure; Durability;
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Times Cited By KSCI : 3  (Citation Analysis)
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