Hololab, Physics Department, University of Liege, Liege, Belgium.
Opt Lett. 2013 May 15;38(10):1730-2. doi: 10.1364/OL.38.001730.
The maximum concentration ratio achievable with a solar concentrator made of a single refractive primary optics is much more limited by the chromatic aberration than by any other aberration. Therefore achromatic doublets made with poly(methyl methacrylate) and polycarbonate are of great interest to enhance the concentration ratio and to achieve a spectrally uniform flux on the receiver. In this Letter, shaped achromatic Fresnel lenses are investigated. One lossless design is of high interest since it provides spectrally and spatially uniform flux without being affected by soiling problems. With this design an optical concentration ratio of about 8500× can be achieved.
用单一折射初级光学元件制成的太阳能集中器所能达到的最大浓度比受到色差的限制要远大于其他像差。因此，用聚甲基丙烯酸甲酯和聚碳酸酯制成的消色差双合透镜对于提高浓度比和实现接收器上光谱均匀通量非常有意义。在这封信中，研究了形状消色差菲涅耳透镜。由于它不受污垢问题的影响，可以提供光谱和空间均匀的通量，因此一种无损耗设计非常有意义。通过这种设计，可以实现约 8500×的光学浓度比。
