| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a daylighting sheet capable of suppressing direct projection of sunlight (direct solar beam), effectively taking in light, and making an outdoor side visible from an indoor side.SOLUTION: A daylighting sheet 20 has a sheet-like shape and is configured to be installed in an opening of a building with a sheet surface thereof vertically disposed. The daylighting sheet 20 includes: a sheet-like base material layer 22 having light transmissivity; and a light deflection layer 23 arranged on one side of the base material layer and configured to deflect light. The light deflection layer includes: light transmission parts 24 aligned in plurality along the one side of the base material layer and configured to transmit light; and light deflection parts 25 arranged between the plurality of light transmission parts and filled with a material having refractive index lower than the light transmission part. Under a position that the daylighting sheet is installed in the opening of the building, in a vertical section in a thickness direction of the daylighting sheet, the upper side of the light deflection part is formed as a polygonal line in which a plurality of straight lines continue, or a curved line, and the upper side is formed projecting downward.</p> |
