| 摘要 |
Disclosed is a concave reflecting mirror (10) for a heliostat, said concave reflecting mirror being provided with: a reflecting member (11) wherein a mirror surface section (15) is provided on the front surface of a base material (14), the rigidity of the peripheral portion is lower than that at the center, and the mirror surface section (15) can be elastically deformed such that the mirror surface section forms a concave paraboloidal surface; a frame member (12), which supports the peripheral portion of the rear surface (16, 35) of the reflecting member (11); and an adjusting member (13), which is attached to the frame member (12), at a position facing substantially the center of the rear surface (16, 35) or that of the front surface of the reflecting member (11), and which elastically deforms the reflecting member (11) by pulling the rear surface (16, 35) of the reflecting member (11) or pressing the front surface of the reflecting member (11). The concave reflecting mirror does not require a pressing apparatus and a molding die, is easily manufactured, and has a highly accurate concave surface formed therein. A method of manufacturing the concave reflecting mirror is also provided. |
