| 摘要 |
PROBLEM TO BE SOLVED: To perform illumination while efficiently distributing light made incident on an optical path of a light guide body to plural light emission parts. SOLUTION: Sunlight is made incident on the light guide body 6 through a converging device to be emitted from the light emission parts 9 provided in respective rooms. Translucent mirrors H1, H2, H3 are arranged on the optical path 17 of the hollow light transmission body 6 corresponding to respective light emission parts 9. These translucent mirrors H1, H2, H3 reflect a part of the arrived light to emit them from the light emission parts 9, and transmit a part of the light through backward. The ratio of the reflectance to the transmissivity is set larger as being more away from a light incident part 7. |
