可见光通信是一种在白光LED技术上发展起来的新兴光无线通信技术,具有发射功率高、无电磁干扰等优点.相比常规透镜,在可见光通信系统的光接收天线上,使用菲涅耳透镜可以降低成本,减小透镜厚度和接收焦距.利用Zemax软件对菲涅耳透镜进行了设计、仿真与优化,首先分析了透镜设计技术要求,提出了基于菲涅耳透镜的设计与仿真方法及参数设置,然后对几类透镜进行了仿真与性能分析,在此基础上进行了透镜设计优化.结果表明,在光垂直入射且探测器尺寸为1.5 mm×1.5 mm情况下,可保证F数小于1,并得到优化的透镜结构和参数,使集光效率达到90％,为基于菲涅耳透镜的天线设计提供了理论与应用基础.
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