| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a natural lighting sheet that enables the sunlight incident upon a window to be guided to a ceiling or the like which sunlight is not directly incident upon with a simpler configuration. <P>SOLUTION: A natural lighting sheet is formed in a sheet shape as a whole, concave grooves 7 formed on a transparent sheet material 4A are filled with a filler to form reflection planes, and reflection by the reflection planes makes the light path of sunlight folded to be guided indoors. <P>COPYRIGHT: (C)2013,JPO&INPIT |
