| 摘要 |
PROBLEM TO BE SOLVED: To provide a reflecting plate which uses, as a reflecting material, an ultrathin metal plate being difficult to stand solely by its own weight or plastically deformable and is capable of maintaining a satisfactory reflecting surface even when being increased in size or being used outdoors.SOLUTION: The reflecting plate uses one surface of a rectangular ultrathin metal plate as a reflecting surface. Both end parts of either one of a longer side or a shorter side of the ultrathin metal plate are wound around fixing members respectively, and at least one of the fixing member is held movably, and the movably held fixing member is moved in such a direction that both of the fixing members are separated from each other, by an adjustment member installed in one or more positions in the vicinity of both ends of the movably held fixing member and/or in a frame side intermediate part between both ends of the fixing member to introduce tension to the ultrathin metal plate, and the ultrathin metal plate is firmly fixed to the fixing members in accordance with the introduced tension. |
