| 摘要 |
PURPOSE:To obtain a small-sized condensing device for efficiently condensing the solar light without tracking the sun, by interposing a reflector having plural reflection angles between a condensing lens and its sun focal locus, always image-forming the solar light at a fixed position, and providing a photodetecting part on the image forming position. CONSTITUTION:Solar light of a 30min interval passes through optical paths P1-P10 by setting a face being in parallel with a ground surface as an (x)-(y) plane, (z) as a height direction, and one beam P5 passing through the center O' of a condensing lens as a representative beam, respectively. A focal locus of the sun by the condensing lens is given by a black bold line. When a reflector is inserted on the way of each optical path P1-P10 and its position and angle are selected suitably, the focus is moved to a point P, and also movement of the focus by time can be compensated. A photodetecting part being fan-shaped as a whole, by which the end faces of optical fibers f1-f10 fall at right angles with reflected light of the optical paths P1-P10 is provided on the point P. In this way, solar light is condensed efficiently without tracking the solar light. |
