| 摘要 |
PROBLEM TO BE SOLVED: To provide a daylighting sheet which suppresses direct sunlight (direct incident light), provides effective daylighting, and allows for viewing outside therethrough from inside.SOLUTION: A daylighting sheet 20 is to be placed over openings of a building such that a sheet surface is vertically oriented, and includes a translucent base material layer 22 and a light deflection layer 23 which is formed on one surface of the base material layer to deflect light, the light deflection layer comprising a plurality of light transmissive sections 24, which are arranged next to each other along the one surface of the base material layer to transmit light, and light deflection sections 25 which are arranged between the plurality of light transmissive sections and are filled with a material having a refractive index lower than that of the light transmissive sections. With the daylighting sheet positioned on an opening of the building, each of the light deflection sections, in a cross-section in a thickness direction of the daylighting sheet, has an upper side having a shape that is either a polygonal line comprising a continuous plurality of lines or a curve and is convex downward, whereas a lower side opposite the upper side is one straight line that is tilted by 0-30°, inclusive, relative to the normal line of the daylighting sheet. |
