| 摘要 |
PURPOSE:To provide a liquid crystal optical element which is easily and precisely controllable in electro-optic characteristics, such as transmission and scattering, and is free from defects, such as air bubbles, within a driving plate. CONSTITUTION:This liquid crystal optical element is formed by holding a liquid crystal material between two sheets of substrates with electrode layers and at l.east one substrate thereof have projections 4 which scatter orientation of the liquid crystal. These projections 4 exist on the liquid crystal material 3 side of the substrates 1 and the directors of the liquid crystal material 3 are scattered by the three-dimensional hindrances of the projections 4, by which a scattered state is obtd. when voltage is not impressed to the element. The directors of the liquid crystal material 3 are unified in one direction by an electric field and, therefore, a transparent state is obtd. when the voltage is impressed to the element. The liquid crystal optical element of a guest-host type is obtainable as well by dispersing dichromatic dyestuff materials into the liquid crystal material. |
