| 摘要 |
PROBLEM TO BE SOLVED: To secure safety by making it possible to see a corner dead space through although there has been the danger that passersby collide with each other as they meet since there is a dead space in a corner where passages intersect in a building etc. SOLUTION: A plane prism and a reflector are combined with each other, then, light from the corner dead space is guided to a person before the corner to enable the person to see the corner dead space through. COPYRIGHT: (C)2008,JPO&INPIT
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