20 February 2017 Fabrication of electro-wetting liquid lenticular lens by using diffuser
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Abstract
Liquid lenticular multi-view system has great potential of three dimensional image realization. This paper aims to introduce a novel fabrication method of electro-wetting liquid lenticular lens using diffuser. The liquid lenticular device consists of a Ultraviolet (UV) adhesive chamber, two immiscible liquids and a sealing plate. The diffuser makes UV light spread slantly not directly to negative photoresist on a glass substrate. In this process, Su-8, the suitable material to fabricate a structure in high stature, is selected for negative photoresist. After forming a Su-8 chamber, the UV adhesive chamber is made through a PDMS sub-chamber that is made from the Su-8 chamber. As such, this research shows a result of a liquid lenticular lens having slanted side walls with an angle of 75 degrees. The UV adhesive chamber having slanted side walls is more advantageous for electro-wetting effect achieving high diopter than the chamber having vertical side walls. After that, gold is evaporated for electrode, and Parylene C and Teflon AF1600 is deposited for dielectric and hydrophobic layer respectively. For two immiscible liquids, DI water and a blend of 1-Chloronaphthalene and Dodecane with specific portions are used. Two immiscible liquids are injected in underwater environment and a glass that is coated with ITO on one side is sealed by UV adhesive. The completed tunable lenticular lens can switch two and three dimensional images by using electro-wetting principle that changes surface tensions by applying voltage. Also, dioptric power and response time of the liquid lenticular lens array are measured.
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Jee Hoon Sim, Jee Hoon Sim, Junoh Kim, Junoh Kim, Cheoljoong Kim, Cheoljoong Kim, Dooseub Shin, Dooseub Shin, Junsik Lee, Junsik Lee, Gyo Hyun Koo, Gyo Hyun Koo, Yong Hyub Won, Yong Hyub Won, } "Fabrication of electro-wetting liquid lenticular lens by using diffuser", Proc. SPIE 10115, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics X, 1011512 (20 February 2017); doi: 10.1117/12.2251619; https://doi.org/10.1117/12.2251619
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