建立了单块样品和两块叠加样品的透射比计算模型, 并提出了一种基于两块相同厚度样品叠加后的透射光谱反演其光学常数的新方法。 通过Bruke V70傅里叶光谱仪测试了不同厚度单块硒化锌样品以及两块硒化锌样品叠加的1.33～21 μm范围的透射光谱, 结合实验透射光谱利用光学常数反演方法, 计算得到了硒化锌样品的光学常数。 部分反演结果与文献中数据进行比较, 验证了反演方法的可靠性。

The transmittance models of single slab and two spliced slabs were built, and a new method to determine optical constants of materials was proposed based on inversing the transmittance spectrograms of single slab and two spliced slabs. The measurements of transmittance spectrogram of zinc selenide glass slabs with different thickness in the infrared wavelength range of 1.33~21 μm at normal incidence were investigated by Bruke V70 FTIR spectrometer. The optical constants of zinc selenide were achieved by the inverse methods. The results indicate that the optical constants of zinc selenide determined by the new inverse method are in good agreement with previous data sets.