| 摘要 |
PURPOSE:To automatically focus a light on one point of a light receiving plate without requiring correction and the like throughout a year by arranging a focusing device and a light receiving plate in parallel to an earth rotating axis and including the rotating shaft of a reflection mirror by an angle of inclination conforming to the latitude of an installed place. CONSTITUTION:A focusing device 1 and a light receiving plate 4 are arranged in parallel to an earth rotating axis, and the axial direction of a rotating shaft 5 is inclined by an angle of inclination theta1, and the light receiving surface 4a of the light receiving plate 4 arranged so that it makes a right angle with the latitude angle theta1. A reflection mirror 2 focuses sun light on one point by rotating the rotating shaft 5 once a day via a second drive gear mechanism 20 of rotation driving means 18. A cylindrical cam 9 affords an inclination of + or -11.75 deg. to a reflected light 3 is focused on one constant point of the light receiving plate 4 throughout a year according to the incidence mirror of sun light.
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