氙灯模拟太阳光谱滤光片的研制

Development of the Filter for Solar Spectrum Simulated

通常太阳模拟器选用大功率短弧氙灯来模拟太阳光,但氙灯光谱在近红外波段区域与真实的太阳光谱存在差异,根据光谱差异的大小,通过选择合适的薄膜材料并采用真空镀膜的方法,研制出0.3～2.5μm波段范围的光学滤光片,对短弧氙灯光谱进行了校正,把波长在0.8～1.1μm之间偏离太阳光谱的辐射次峰滤掉,校正后的光谱辐照分布接近太阳光谱,其辐照匹配度符合AM1.5太阳光谱的A级匹配标准。

In the study on the time value of annuities,usually the interest rate is assumed to be constant.But actually it is affected by various factors.Here,model is built to express the interest rate term structure.The moments of the final rainbow-payment-annuity is studied,and the simple formulas for the expectation and variance of present value are given.By numerical simulation,the influence of relevant parameters on the expectation of present value is analyzed.Our researches provide the useful references for the annuity pricing.