@article{(Open Science Index):https://publications.waset.org/pdf/7753,
	  title     = {Voltage-Controllable Liquid Crystals Lens},
	  author    = {Wen-Chi Hung and  Tung-Kai Liu and  Ming-Shan Tsai and  Chun-Che Lee and  I-Min Jiang},
	  country	= {},
	  institution	= {},
	  abstract     = {This study investigates a voltage-controllable liquid crystals lens with a Fresnel zone electrode. When applying a proper voltage on the liquid crystal cell, a Fresnel-zone-distributed electric field is induced to direct liquid crystals aligned in a concentric structure. Owing to the concentrically aligned liquid crystals, a Fresnel lens is formed. We probe the Fresnel liquid crystal lens using a polarized incident beam with a wavelength of 632.8 nm, finding that the diffraction efficiency depends on the applying voltage. A remarkable diffraction efficiency of ~39.5 % is measured at the voltage of 0.9V. Additionally, a dual focus lens is fabricated by attaching a plane-convex lens to the Fresnel liquid crystals cell. The Fresnel LC lens and the dual focus lens may be applied for DVD/CD pick-up head, confocal microscopy system, or electrically-controlling optical systems.
},
	    journal   = {International Journal of Physical and Mathematical Sciences},
	  volume    = {5},
	  number    = {7},
	  year      = {2011},
	  pages     = {980 - 983},
	  ee        = {https://publications.waset.org/pdf/7753},
	  url   	= {https://publications.waset.org/vol/55},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 55, 2011},
	}