可提高太阳模拟器均匀性的变形椭球面聚光镜

A Deformed Ellipsoid Condenser Beneficial to the Uniformity of the Solar Simulator

辐照面的均匀性是太阳模拟器的重要指标。椭球面聚光镜是太阳模拟器的重要组成部分,它能够将光源发出的光能收集并会聚在第二焦面上,并在第二焦面上形成中间强边缘弱的高斯能量分布,该能量分布直接影响辐照面的均匀性。从椭球面方程泰勒展开后得到的高阶方程中演变得到了一种变形的椭球面,这种变形椭球面聚光镜能够改善第二焦面上的能量分布,使第二焦面上光能量的强弱对比减弱,从而提高太阳模拟器辐照面的均匀性。将某项目中的椭球面聚光镜进行了变形,并在Matlab中进行了数值计算,获得了变形椭球面曲线,最后通过LightTools仿真分析证明该变形椭球面聚光镜有利于第二焦面上能量分布均匀性的提高。

Uniformity is an important index of the solar simulator, and the ellipsoid condenser plays an important role in solar simulator. Light energy emitted from the light source can be collected and aggregated on the second focal plane, and Gaussian energy distribution is formed by using the ellipsoid condenser. The uniformity of the irradiated surface is directly determined by the distribution. A deformed ellipsoid condenser is obtained through ellipsoid equation Taylor expansion. The surface of the condenser can be deformed by 3 coefficients. The energy distribution on the second focal plane can be improved by the deformed ellipsoid condenser, and the uniformity of the solar simulator can be enhanced because of the weakened light energy contrast. An ellipsoid condenser used in a project is deformed and the deformed ellipsoid curve is obtained by using Matlab. The uniformity improvement on the second focal plane is proved by the simulation results of LightTools.