| 摘要 |
PROBLEM TO BE SOLVED: To materialize a solar azimuth tracking device having a simple mechanism, a solar light condensing device, and a solar light illumination system using it. SOLUTION: This solar azimuth tracking device 3 has a thermally expanding body 5 which expands and contracts based on heat by solar light 7, a movement conversion part 6 to convert reciprocation attendant on expansion and contraction of the thermally expanding body 5 to a movement corresponding to the diurnal movement of the sun, and a tracking device body 4 to track a solar azimuth by interlocking with movement by the movement conversion part 6. COPYRIGHT: (C)2009,JPO&INPIT
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