| 摘要 |
PROBLEM TO BE SOLVED: To provide a heliostat on whose surface of a mirror dirt hardly attaches.SOLUTION: Since rotating up to a position where the surface 2a of a mirror 2 faces directly downward about a second shaft B, a frame 17 can be maintained with the surface 2a of the mirror 2 facing directly downward during the night. Consequently, there is no risk of dirt such as dust to deposit onto the surface 2a of the mirror 2. During the night water vapor rising from the ground causes water drops to be attached by dew condensation onto the surface 2a of the mirror 2 facing downward, allowing the surface 2a of the mirror 2 to be washed by using the water drops.SELECTED DRAWING: Figure 14 |
