Polarization-insensitive liquid crystal microlens array with dual focal modes.
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.
Che-Ju
CJ
Hsu
Chen-Hau
CH
Liao
Bao-Long
BL
Chen
Shang-Yi
SY
Chih
Chi-Yen
CY
Huang
D007368:Interferometry; D007909:Lenses; D008027:Light; D050866:Liquid Crystals / Q000737:chemistry*; D008853:Microscopy; D055095:Optics and Photonics / Q000295:instrumentation*; D017971:Tin Compounds / Q000737:chemistry
D017971:Tin Compounds; C109984:indium tin oxide