大面积发散太阳模拟器的均匀照明

为实现太阳模拟器的大辐照面积均匀照明, 研究了大面积发散太阳模拟器光学系统的设计与仿真。分析了复眼透镜阵列组与发散投影系统的工作原理及旁瓣效应的产生机理; 基于嵌套建模思想, 结合多项式拟合方法, 得出了氙灯轴上的强度分布曲线, 并根据氙灯发光能量对称的性质, 实现了氙灯空间光强分布的模拟; 结合提出的光学系统设计边界条件与参数, 设计了光束整形系统、复眼透镜阵列组和发散投影系统。实验结果表明: 大面积发散太阳模拟器的工作距离为20 000 mm, 辐照面直径为1 500 mm, 辐照均匀度为92.8%, 满足均匀照明的使用需求。

Abstract

An optical system simulation and design methods for large-area divergent solar simulators were studied to achieve uniform illumination of a large irradiation area of solar simulators. First, the working principles of fly-eye lens array groups and examine divergent projection systems as well as the production mechanism of the sidelobe effect was analyzed. Subsequently, using nesting modeling combined with the polynomial fitting method, the intensity distribution curve of the xenon lamp axis was obtained. Then a luminous intensity distribution simulation of the xenon lamp was conduct based on the luminous energy symmetry of the xenon lamp. Considering the boundary conditions and parameters for the optical system designly, a beam-shaping system, a fly-eye lens array group, and a divergent projection system were designed. The experimental results show that when the working distance is 20 000 mm and the irradiation surface diameter is 1 500 mm, the irradiation uniformity is 92.8%, which meets the uniform illumination requirement for large-area divergent solar simulators.

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