平板菲涅尔透镜设计及组合优化方法

Flat Plate Type Fresnel Lens Design and Its Combinatorial Optimization

为了解决传统的球面菲涅尔透镜模具加工工艺难度大、精度低、制作成本高等问题,提出一种中心透镜为球面、外侧环带为倾斜面的平板菲涅尔透镜的设计方法,并进行了基于多平面拟合和基于多焦点的组合优化设计,给出了具体设计实例,进行了光学仿真.结果表明:优化后菲涅尔透镜聚光效率达93%,聚焦光斑能量均匀性4.9,满足设计要求.

To solve the problem that the traditional spherical Fresnel lens mold processing was difficult, low precision and high cost, a Fresnel lens design was presented to gain higher optical efficiency. In this design, spherical surface for center lens and inclined plane for outer rings based on the result of multi- plane fitting and multi-focal combinatorial optimization were employed. A design case was given as well as its optical simulation. Results show that, after optimization, the Finel lens concentrator efficiency up to 93% , the focused beam energy uniformity 4.9, meet the design requirements.