PLANAR OPTICAL ELEMENT, ILLUMINATION DEVICE, AND CONSTRUCTION MATERIAL

摘要

This planar optical element (1) is provided with at least one optical functional unit (2). The optical functional unit (2) is provided with: two electrodes (3) that oppose each other along one direction; and an optical functional layer (4) that is interposed between the two electrodes (3) and that, in accordance with changes in the voltage imposed between the electrodes (3), changes the magnitude of an optical characteristic selected from the light scattering properties, light reflecting properties, and light absorbing properties. Each electrode (3) is provided with a low-resistance site (11) and a high-resistance site (12) having a higher electrical resistance than the low-resistance site (11).