| 摘要 |
PURPOSE:To collect the sun light and transmits it to an arbitrary position by a structure wherein the light receiving ends of photoconductors are located at the focal positions of a plurality of linear Fresnel lens. CONSTITUTION:A plurality of the linear Fresnel lens 21-2n are integrally formed over a top plate 1. Photocollectors 31-3n, which introduce the sun light in the photoconductors 41-4n are located at the focal positions of the lenses 21- 2n. More improvement of the light focusing power is obtained by making the photocollectors 31-3n shiftable in response to the hour of the day or to the season of the year. |
