【摘要】 利用傅里叶变换红外光谱法记录了聚酯薄膜红外透射光谱,用光谱中的干涉条纹测量高波数区的折射率及薄膜的厚度。根据对实验光谱的连续KramersKronig分析和光谱模拟计算得到了该薄膜消光系数K（v）和折射率n（v）的色散曲线(3100～700cm^-1),在这些光学常数色散谱中完全消除了干涉条纹的干扰。这一方法适用于各种无支撑固体薄膜。更多还原

【Abstract】 The transmittance spectrum of free-standing thin polyester film is recorded with Fourier transform infrared spectroscopy. The interference fringes present in the above spectrum have been used to measure refractive index in high wavenumber region and the film thickness. The dispersion curves of extinction coefficient K （v） and refractive index n（v）.(3100～700cm^-1) are obtained on the basis of the continuous Kramers-Kronig analysis and the spectroscopic simulative calculation from the observed spectrum. The disturbance of interference fringes is thorough]y eliminated in these dispersion spectra. This method is suitable for all kinds of free-standing solid films.更多还原