| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that since a solar lens, which is a measure to condense solar light continuously varying in altitude and direction with a static lens, has a long shell-shape in the axial direction in relation to its diameter, the large diameter lens is too long in the axial direction and requires too much lens material, thus being heavy, and when condensing solar light from sunrise through sunset, the lens is not suitable for condensing light in the mornings and evenings providing low altitude. SOLUTION: A plurality of transparent annular lenses with the same cross-sectional form as the W-shaped solar lens on which a conical auxiliary lens is buried coaxially on the bottom of a reverse-conical main lens are arranged coaxially in the radial direction or axial direction to form a laminated solar lens, and the light beams condensed by each annular lens are condensed by a light guide cylinder to reduce the mutual interval, connected to the solar lens, and re-condensed. COPYRIGHT: (C)2009,JPO&INPIT
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