4 March 2016 Development of new maskless manufacturing method for anti-reflection structure and application to large-area lens with curved surface
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Abstract
In general, thin-film coating process is widely applied on optical lens surface as anti-reflection function. In normal production process, at first lens is manufactured by molding, then anti-reflection is added by thin-film coating. In recent years, instead of thin-film coating, sub-wavelength structures adding on surface of molding die are widely studied and development to keep anti-reflection performance. As merits, applying sub-wavelength structure, coating process becomes unnecessary and it is possible to reduce man-hour costs. In addition to cost merit, these are some technical advantages on this study. Adhesion of coating depends on material of plastic, and it is impossible to apply anti-reflection function on arbitrary surface. Sub-wavelength structure can solve both problems. Manufacturing method of anti-reflection structure can be divided into two types mainly. One method is with the resist patterning, and the other is mask-less method that does not require patterning.

What we have developed is new mask-less method which is no need for resist patterning and possible to impart an anti-reflection structure to large area and curved lens surface, and can be expected to apply to various market segments. We report developed technique and characteristics of production lens.
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Kazuya Yamamoto, Kazuya Yamamoto, Toshimitsu Takaoka, Toshimitsu Takaoka, Hidetoshi Fukui, Hidetoshi Fukui, Yasuyuki Haruta, Yasuyuki Haruta, Tomoya Yamashita, Tomoya Yamashita, Seiichiro Kitagawa, Seiichiro Kitagawa, "Development of new maskless manufacturing method for anti-reflection structure and application to large-area lens with curved surface", Proc. SPIE 9742, Physics and Simulation of Optoelectronic Devices XXIV, 974221 (4 March 2016); doi: 10.1117/12.2213776; https://doi.org/10.1117/12.2213776
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