| 摘要 |
PROBLEM TO BE SOLVED: To improve and standardize a daylighting amount at a time and season when sun angles are low and provide a shape and structure where a direction of a building body gets no restriction, and reduce the number of components and manufacturing cost.SOLUTION: A sunlight daylighting device 10 includes a transparent dome 1 made of acrylic resin or polycarbonate resin and a three-dimensional reflection mirror 2 having a reflection area of 1/4 or more of an inner surface area of the dome 1. The sunlight daylighting device 10 has a bottom part 3 of a rectangular or circular shape, and it is desirable that a shape of the dome 1 may be cylindrical at 1/4 to 1/2 of its height from the bottom part 3 up to a dome apex part 1a and an upper part may be hemispherical. |
