TY - GEN
T1 - Fabrication of an antireflective structure on a lenticular lens
AU - Yatagawa, Katsuyuki
AU - Nakamura, Masato
AU - Ono, Masaki
AU - Taniguchi, Jun
AU - Hiwasa, Shin
N1 - Publisher Copyright:
Copyright © 2020 JSME. Published with permission.
PY - 2020
Y1 - 2020
N2 - In our previous study, various lenses with antireflective structures (ARSs) were fabricated by ultraviolet nanoimprint lithography (UV-NIL) and a thin flexible replica mold, which had ARSs. However, in the case of a lens with a large uneven surface such a lenticular lens, it is difficult to transfer an ARS. In this paper, the improvement of the transfer process for a lenticular lens with an ARS is investigated. A master mold of ARSs was fabricated by irradiating glassy carbon with an oxygen ion beam. A flexible replica mold with ARSs was transferred from the ARS master mold by UV-NIL. In this case, the thickness of the flexible replica mold was 210 µm. A lenticular lens with the reverse shape was also transferred from the original lenticular lens by UV-NIL. To add an ARS to the lenticular lens with the reverse shape, it was covered with a flexible replica mold coated with a UV-curable resin. In addition, the lenticular lens was placed on the back side of the flexible replica mold to contact the lens curve properly. Afterwards, the setting samples were pressed with a roll press and simultaneously UV-cured. After this roll press method was carried out, a lenticular lens with the reverse shape and an ARS was obtained. Using this mold, a lenticular lens with an ARS was replicated by UV-NIL and the reverse-shape mold with an ARS.
AB - In our previous study, various lenses with antireflective structures (ARSs) were fabricated by ultraviolet nanoimprint lithography (UV-NIL) and a thin flexible replica mold, which had ARSs. However, in the case of a lens with a large uneven surface such a lenticular lens, it is difficult to transfer an ARS. In this paper, the improvement of the transfer process for a lenticular lens with an ARS is investigated. A master mold of ARSs was fabricated by irradiating glassy carbon with an oxygen ion beam. A flexible replica mold with ARSs was transferred from the ARS master mold by UV-NIL. In this case, the thickness of the flexible replica mold was 210 µm. A lenticular lens with the reverse shape was also transferred from the original lenticular lens by UV-NIL. To add an ARS to the lenticular lens with the reverse shape, it was covered with a flexible replica mold coated with a UV-curable resin. In addition, the lenticular lens was placed on the back side of the flexible replica mold to contact the lens curve properly. Afterwards, the setting samples were pressed with a roll press and simultaneously UV-cured. After this roll press method was carried out, a lenticular lens with the reverse shape and an ARS was obtained. Using this mold, a lenticular lens with an ARS was replicated by UV-NIL and the reverse-shape mold with an ARS.
KW - Lenticular lens
KW - Moth-eye
KW - UV-NIL
UR - http://www.scopus.com/inward/record.url?scp=85100912146&partnerID=8YFLogxK
U2 - 10.1115/LEMP2020-8534
DO - 10.1115/LEMP2020-8534
M3 - Conference contribution
AN - SCOPUS:85100912146
T3 - JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020
BT - JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020
PB - American Society of Mechanical Engineers
T2 - JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020
Y2 - 3 September 2020
ER -