| 摘要 |
PROBLEM TO BE SOLVED: To provide a daylighting device that can irradiate a certain area in a room with received light regardless of a shift in position of a light source like the sun, and has small installation area.SOLUTION: A daylighting device 11 has a plurality of slats 13 arranged in multiple stages, and the plurality of slats 13 each have a first sub-slat 13a having a reflection surface having a plurality of reflection regions formed periodically along a length of the slat 13, a second sub-slat 13 arranged on a reflection surface side of the first sub-slat 13a, and means of sliding the second slat 13b along the length of the slat relatively to the first sub-slat 13a. The second sub-slat 13b has a plurality of translucent parts 17 corresponding to the plurality of reflection regions, which each have a sectional shape changing in plane normal along the length of the first sub-slat 13a. |
