Open AccessPolarization-insensitive liquid crystal microlens array with dual focal modes
Author(s) -
Che Ju Hsu,
Chen Hau Liao,
Bao Long Chen,
Shang Yi Chih,
Chi Yen Huang
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.025925
Subject(s) - microlens , optics , materials science , liquid crystal , focal length , disclination , polarization (electrochemistry) , electrode , birefringence , lens (geology) , optoelectronics , physics , chemistry , quantum mechanics
We demonstrate a liquid crystal (LC) microlens array (MLA) fabricated by LCs possessing negative dielectric anisotropy, in conjunction with a cell with a three-electrode structure. The presented LC MLA is polarization-insensitive and can be operated in both concave and convex modes. The shortest focal length of the LC MLA is -2.54 and 2.22 mm in concave and convex mode, respectively. Disclination lines that are usually observed in conventional hole-patterned LC lens can also be avoided because of the vertical alignment treatment of LCs.