| 摘要 |
PROBLEM TO BE SOLVED: To provide a small and lightweight concentration type solar cell which can extensively reduce cost of apparatus and driving energy for tracking. SOLUTION: Several concentrating lens 10 are arranged and fixed and solar cells 14 are placed in the concentration spot formed by the concentrating lens 10. A heat collecting plate 18 is fixed on a table 12 on which solar cells 14 are placed constituting a position detecting sensor 28. The position of the table 12 is controlled so that the concentration spot may be placed in the center 32. If the concentration spot, deviating from the center 32, falls on the hrat collecting plate 18, the heat is transferred from the heat collecting plate 18 to a shape-memory alloy spring 22. The shape-memory alloy spring 22 contracts and the table 12 is transferred toward the side of the deviation of the concentration spot. The center 32 of the position detecting sensor 28 and each of the solar cell 14 are adjusted to the position of the concentration spot.
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