| 摘要 |
PURPOSE:To maintain a shape of the specular surface, to make the titled condenser light in weight, and to manufacture it at low cost by applying an electrode between a reflecting mirror and an external electrode, forming an electrostatic field between both of them, and attracting the reflecting mirror in the direction of the electrode. CONSTITUTION:A peripheral part of a film-like reflecting mirror consisting of a parabolic shape of a bowl type is joined to a circular supporting frame 2 and supported thereby, and also, a light receiving part 3 is installed in a position corresponding to a focus of the parabolic surface, and an electrode 4 is installed on the center line axis in its opposite reverse side. In this state, by applying the power between the reflecting mirror 1 and the electrode 4, attraction is generated between both of them, and the reflecting mirror 1 can be attracted in the direction of the electrode 4. Accordingly even when the supporting frame 2 for supporting the periphery of the reflecting mirror 1 is not horizontal, the parabolic shape of the bowl type can be maintained, and an incident light 6 from the directrix direction being parallel to its center axis can be condensed to the light receiving part 3. In such a case, the power consumption for maintaining the shape of the reflecting mirror is a little. |
