SPIRAL FRESNEL REFLECTOR FOR REFLECTING AND CONCENTRATING SOLAR ENERGY AND METHOD FOR FORING THE SAME

摘要

A spiral Fresnel reflector is formed by plotting a predetermined developed spiral on a flat sheet of reflecting material, cutting the flat sheet of reflecting material along the developed spiral and winding up the developed spiral until the spiral arms focus reflective light at a focal area. The developed spiral can have either a positive or a negative focal length.