Title:
OPTICAL DUCT INCLUDING RAINBOW PATTERN GENERATING FUNCTION
Document Type and Number:
Japanese Patent JP2015097169
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide indoor emitted light having a decorative high added value like brightness and a rainbow pattern, by generating chromatic dispersion light to be the rainbow pattern from outdoor natural light taken into an optical duct, and discharging the light to a building inside.SOLUTION: A prism sheet 5 for generating chromatic dispersion light is provided on part of an optical path from a light-collecting portion 3a to a light-discharging portion 3c of a vertical mold optical duct 3 so as to output natural light emitted into the light-collecting portion 3a from the light-discharging portion 3c to an indoor space area 1, as the chromatic dispersion light according to the difference of a wave length. The light emitting side or light discharging side of the prism sheet 5 is provided with a louver 7 for adjusting the propagation direction of the natural light.
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Inventors:
ARAI HIDEO
NOGAMI AKIRA
SUGIYAMA TORU
NOGAMI AKIRA
SUGIYAMA TORU
Application Number:
JP2013237073A
Publication Date:
May 21, 2015
Filing Date:
November 15, 2013
Export Citation:
Assignee:
MATERIAL HOUSE KK
International Classes:
F21S11/00
Domestic Patent References:
| JPH11301200A | 1999-11-02 | |||
| JPS62115118A | 1987-05-26 | |||
| JP2000075238A | 2000-03-14 | |||
| JP2010225352A | 2010-10-07 | |||
| JPH05295863A | 1993-11-09 |
Foreign References:
| US20070266652A1 | 2007-11-22 |
Attorney, Agent or Firm:
Haruyuki Tanaka