Polarization-insensitive liquid crystal microlens array with dual focal modes

Che Ju Hsu; Chen Hau Liao; Bao Long Chen; Shang Yi Chih; Chi Yen Huang

doi:10.1364/OE.22.025925

Polarization-insensitive liquid crystal microlens array with dual focal modes

Che Ju Hsu, Chen Hau Liao, Bao Long Chen, Shang Yi Chih, Chi Yen Huang

Graduate Institute of Photonics

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	25925-25930
Number of pages	6
Journal	Optics Express
Volume	22
Issue number	21
DOIs	https://doi.org/10.1364/OE.22.025925
Publication status	Published - 2014 Oct 20

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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AU - Hsu, Che Ju

AU - Liao, Chen Hau

AU - Chen, Bao Long

AU - Chih, Shang Yi

AU - Huang, Chi Yen

PY - 2014/10/20

Y1 - 2014/10/20

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AB - 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.

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