Hololab, Physics Department, Bat. B5a, University of Liege, 17 allée du 6 Août, B-4000 Liege, Belgium.
Opt Lett. 2011 Jul 15;36(14):2743-5. doi: 10.1364/OL.36.002743.
Solar concentrators made of a single refractive primary optics are limited to a concentration ratio of about 1000× [Opt. Express 19, A280 (2011)], due only to longitudinal chromatic aberration, while mirrors are limited to ∼46,000× by the angular size of the Sun. To reduce the chromatic aberration while keeping cost-effective systems for concentrated photovoltaics, a study of four different kinds of flat Fresnel doublets made of polycarbonates and polymethyl methacrylate is presented. It reveals that Fresnel doublets may have fewer optical losses than non-Fresnel doublets, with a lower lateral chromatic split allowing for even higher concentration ratio.
由于纵向色差的限制，由单个折射初级光学元件制成的太阳能聚光器的聚光比最高只能达到 1000×左右[Opt. Express 19, A280 (2011)]，而由于太阳的角度尺寸限制，镜子的聚光比最高只能达到约 46,000×。为了降低色差，同时保持聚光光伏系统具有成本效益，研究了由聚碳酸酯和聚甲基丙烯酸甲酯制成的四种不同类型的平面菲涅耳双凸透镜。结果表明，菲涅耳双凸透镜的光损耗可能比非菲涅耳双凸透镜少，较低的横向色差分裂允许更高的聚光比。
