| 摘要 |
The present invention has a subject of irradiating a sufficient amount of light to an area or a part, which is shaded or does not receive a sufficient amount of light due to a structure or other objects, by light distribution control or luminous flux density control with diffusion, refraction, division and the like of light. sunbeams are diffused by a transparent body disposed above two buildings, and the diffused light reaches an area or a part that has conventionally been shaded.
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