Excellence in Research and Innovation for Humanity
@article{(International Science Index):http://waset.org/publications/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 Mathematical, Computational, Physical, Electrical and Computer Engineering},  volume    = {5},
  number    = {7},
  year      = {2011},
  pages     = {980 - 983},
  ee        = {http://waset.org/publications/7753},
  url       = {http://waset.org/Publications?p=55},
  bibsource = {http://waset.org/Publications},
  issn      = {eISSN:1307-6892},
  publisher = {World Academy of Science, Engineering and Technology},
  index     = {International Science Index 55, 2011},
}