Electrically-
Electrically-Controllable Fresnel Lens Based on Liquid Crystal
Chi-Ting Horng1, Mu-Hsin Chen2, Chung-Hsin Liao3 and Shuan-Yu Huang4,,5*
1Department of Ophthalmology, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan, ROC
2 Department of Optometry,Chung Hwa University of Medical Technology, No.89, Wunhua 1st St., Rende Township, Tainan County, Taiwan 717, ROC
3 Department of Electronics, Cheng Shiu University, No.840, Chengcing Rd, Niaosong Township, Kaohsiung County, Taiwan 83347, ROC
4School of Optometry, Chung Shan Medical University, Taichung, Taiwan 402, ROC
5Department of Ophthalmology, Chung Shan Medical University Hospital, Taichung, Taiwan 402, ROC
Abstract: This study proposes an electrically-controllable Fresnel lens based on liquid crystals. A special design patterned electrode type and a homogeneous alignment sample cell has been fabricated to form a liquid crystals lens. The transmission light can be focused or defocused by varying the applied voltage. The focal length in this Fresnel lens is around 300 mm.
[Chi-Ting Horng, Mu-Hsin Chen, Chung-Hsin Liao, Shuan-Yu Huang. Electrically-Controllable Fresnel Lens Based on Liquid Crystal. Life Sci J 2012;9(1):474-476] (ISSN:1097-8135). http://www.lifesciencesite.com. 71
Keywords: Fresnel lens, liquid crystals
