LIQUID CRYSTAL OPTICAL ELEMENT, METHOD FOR MANUFACTURING THE SAME, AND OPTICAL DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a liquid crystal optical element in which transmittance is varied while a low scattering state is maintained by varying an applied voltage and to use it as an aperture for an optical device. SOLUTION: A liquid crystal-polymer composite containing a dichroic dye, a liquid crystal and a polymer is used as the liquid crystal optical element. The transmittance is varied along a transmittance curve 10 by varying the voltage applied to an electrode. The transmittance THat a high transmission state and the transmittance TLat a low transmission state are made to be≥45% and≤40% respectively. Further the liquid crystal optical element is used in a state in which scattering transmittance Tdis≤20% and in a region T10between the high transmission state and the low transmission state wherein a transmittance ratio KHLis kept≥1.2. COPYRIGHT: (C)2004,JPO