| 摘要 |
PURPOSE: A focusing apparatus is provided to enhance condensing grade of sunlight without using a secondary focusing lens by using a Fresnel lens of a focus mode. CONSTITUTION: A Fresnel lens(10) is made of multiple division lenses. The number of division lenses is 4 or 8. A solar cell(30) generates current by sunlight which is incoming from a Fresnel lens. A printed circuit board(40) comprises a circuit for sensing current generated in the solar cell to a battery. A heat radiation pin(50) releases heat generated by the sunlight condensed in the solar cell. |
