| 摘要 |
<p>An optical element for use as a linear solar concentrator, comprising a polymer foil with a lower Fresnel lens mirror structure and an optional upper anti reflective layer, causing normal incident solar light to be deflected near the plane of the element. Arranging a multitude of such optical elements on a structure in such a way that the deflected light from each optical element will intersect a common focal line with a solar intensity of at least 10 times the direct normal intensity. The deflected light may be used in applications for concentrated solar power and concentrated photo voltaics. The optical element greatly reduces internal losses found in typical Fresnel lens mirror structures (microscopic and macroscopic), especially for large deflection angles. The main advantage is that the focusing element becomes flat, compared for instance with trough-like parabolic mirrors, reducing the complexity of both manufacture and deployment. A further advantage is that it is possible to manufacture such optical elements using high throughput roll-to-roll processes, greatly lowering the cost of manufacturing solar reflectors.</p> |
