Share Email Print
cover

Proceedings Paper

128×128 elements liquid crystal cylindrical lens array with electrically tunable focal length
Author(s): Hui Li; Kan Liu; Chen Zhu; Xinyu Zhang; Changsheng Xie; Tianxu Zhang; Xubang Shen
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A liquid crystal (LC) cylindrical lens array with electrically tunable focal length is proposed, which is first fabricated. And its optical focusing characteristics are got in tests. The LC cylindrical lens array is driven by applied voltage. It composes of two ITO glasses substrates and LC layer. The top electrode pattern is fabricated by the methods of lithography and hydrochloric acid etching, which has 128×128 elements. Every element is a 60μm×200μm rectangle. The 20μm-thickness-spacer is used to control the LC thickness. When the external electric field is applied, the LC molecules begin to rotate. Then the gradient refractive index forms in the LC cell. The LC cylindrical lens array is a convergent lens array. The parallel white light is used to test its optical characteristics. It comes to a conclusion that the focal length of the LC cylindrical lens array and the external applied voltage has an inverse proportion relationship. The range of the focal length is from 60μm to 450μm, when the applied voltage varies from 1.54 Vrms to 5.0 Vrms. And the response time is up to sub-microsecond. The unique focusing phenomenon of LC cylindrical lens array is that the focusing beams in the top and bottom of every element rectangle are like the image "V".

Paper Details

Date Published: 18 August 2010
PDF: 7 pages
Proc. SPIE 7775, Liquid Crystals XIV, 777517 (18 August 2010); doi: 10.1117/12.859802
Show Author Affiliations
Hui Li, Huazhong Univ. of Science and Technology (China)
Kan Liu, Huazhong Univ. of Science and Technology (China)
Chen Zhu, Huazhong Univ. of Science and Technology (China)
Xinyu Zhang, Huazhong Univ. of Science and Technology (China)
Changsheng Xie, Huazhong Univ. of Science and Technology (China)
Tianxu Zhang, Huazhong Univ. of Science and Technology (China)
Xubang Shen, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7775:
Liquid Crystals XIV
Iam Choon Khoo, Editor(s)

© SPIE. Terms of Use
Back to Top