| 摘要 |
<P>PROBLEM TO BE SOLVED: To aim at realization of efficient natural light illumination for a whole region of an indoor space region, by propagating toward a rear part the natural light coming into the indoor space region such as a hallway from a daylighting part such as a window. <P>SOLUTION: Horn-type light ducts 5a for changing propagation paths of natural light incident from a daylighting part 3 at an end side of the hallway 1 toward an upper part near a ceiling face 1a of a wall face 1f are provided, and mirror faces 1j are provided at an upper part of the wall face 1f so that the natural light emitting from the light ducts 5a is reflected and propagated toward a rear direction indoors. Further, a light diffusion part (a white color part) is provided at the ceiling face 1a of the hallway 1, so that an illumination function by diffusion action of the natural light reaching the ceiling face 1a from the light ducts 5a is also utilized. <P>COPYRIGHT: (C)2012,JPO&INPIT |
