To provide an optical duct device capable of emitting to inside the room by effectively utilizing the light introduced from a plurality of light-taking inlets.
The light outside of a building is introduced inside an optical duct 4 by reflecting by means of a reflecting plate 3 of light-taking inlets 2a, 2b. The light introduced from the light-taking inlets 2a, 2b is transferred toward the depth of the optical duct by reflecting inside the optical duct 4, and emitted to inside the room from a light-introducing port 8 provided at the optical duct 4. A separating plate 11 constituting a separating face is provided at the optical duct 4 and the optical duct 4 is split into two regions 4-1, 4-2 by the splitting plate 11. The splitting plate 11 has a reflecting surface on the surface facing the light-taking inlet, and the light reflected at the splitting plate 11 is emitted to inside the room from the light-introducing port 8 provided near the splitting plate 11. Since the splitting plate 11 is provided, the light entered from one of light-taking inlets does not go outside from the light-taking inlet on the other side, thereby the light inside of the optical duct 4 can be emitted into the room effectively.
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KAIHO KOICHI
SEKINE MASAFUMI
MATERIAL HOUSE KK