长方形均匀光斑菲涅尔聚光镜的设计

Design of Rectangle Uniform Spot for Fresnel Concentrator

基于共轴聚焦设计提出了分区域聚焦法和修正分区域聚焦法。基于分区域聚焦法设计了50mm×100mm的长方形菲涅尔聚光镜。针对两组不同阵列尺寸的接收器,分析菲涅尔聚光镜的环带宽度分别为1、0.5、0.2mm时的聚光效果。结果表明随环带宽度的减小,光斑分布的均匀性逐渐增大,证明采用修正分区域聚焦法设计的菲涅尔聚光镜可以在保证聚光效率基本不变的同时,进一步提高聚光光斑分布的均匀性。

Based on the coaxial focusing design,subregional focusing method and modified subregional focusing method were proposed in this paper.A 50 mm×100 mm rectangle Fresnel concentrator was designed based on the subregional focusing method.For the two groups of different array size receivers,the focusing effect of the Fresnel concentrator with bandwidth of 1,0.5 and 0.2 mm were analyzed,respectively.The results show that the uniform distribution of the spots could increase gradually as the band width decreases.The Fresnel concentrator designed by the modified subregional focusing method could further improve the uniformity of the spot,while ensuring the concentration efficiency basically unchanged.