title: Determination of actual surface azimuthal anchoring strength using a wedge-shaped liquid crystal cell.
abstract: We present a method that determines the actual surface azimuthal anchoring strength based on the torque balance. It is found by an optical technique of measuring simultaneously the cell thicknesses and twist angles at two regions of a wedge-type liquid crystal cell whose cell thickness varies continuously between different positions in the cell.
authors.affiliation: Department of Optics and Photonics, National Central University, No. 300, Jhongda Road, Jhongli City,Taoyuan County, Taiwan 32001, China.
authors.forename: Jin Seog
authors.initials: JS
authors.lastname: Gwag
authors.forename: Jonghoon
authors.initials: J
authors.lastname: Yi
authors.forename: Jin Hyuk
authors.initials: JH
authors.lastname: Kwon