Title :
Precise optical retardation measurement of nematic liquid crystal display using the phase-sensitive technique
Author :
Hwang, Shug June
Author_Institution :
Dept. of Electron. Eng., Nat. United Univ., Miao-Li, Taiwan
Abstract :
A simple and novel optical heterodyne interferometer based on phase measurement was developed to measure liquid crystal cell parameters. Due to a common-path configuration utilized in this method, the Fabry-Perot effect and surface reflection could be eliminated in measurement, and a highly accurate measurement was expected. Based on the experimental data of the voltage-dependent phase change, the maximum phase retardation and cell gap of the nematic liquid crystal (NLC) layer was achieved experimentally. Experimental results agree well with theory.
Keywords :
light interferometers; liquid crystal displays; nematic liquid crystals; optical retarders; optical variables measurement; phase measurement; NLC layer; Zeeman laser; cell gap; common-path configuration; liquid crystal cell parameter; nematic liquid crystal display; optical heterodyne interferometer; optical retardation measurement; phase measurement; phase retardation; phase-sensitive technique; voltage-dependent phase change; Liquid crystal displays; Optical interferometry; Optical mixing; Optical polarization; Optical reflection; Optical retarders; Optical sensors; Optical surface waves; Phase measurement; Wavelength measurement; Heterodyne interferometer; Zeeman laser; liquid crystal display (LCD); phase retardation;
Journal_Title :
Display Technology, Journal of
DOI :
10.1109/JDT.2005.852513
