论文部分内容阅读
在常规的傅里叶变换红外光谱(FTIR)学中,干涉图的直流成分为∫∞0B(σ)Dσ,而在时间分辨FTIR中,直流成分IDC(τ)成为∫∞0B(σ,τ)Dσ,即与信号出现的时间τ有关,称为定时直流成分.IDC(τ)具有随红外信号强度B(σ)成正比以及不可被滤除等性质.IDC(τ)经傅氏变换后在光谱中出现定时零频信号Bτ(0).IDC和Bτ(0)可用来多方面监测实验条件如气压、激光强度和窗口碳化的变化,以及可用于测量仪器的响应时间和带通频率.“,”The direct current component in the interferogram of conventional FTIR spectroscopy is expressed by ? ∫ ∞ 0 B(σ) d σ?.However,in time resolved FTIR spectroscopy,the direct current component ?I dc (τ) also depends upon τ?,the time which IR signal appears.?I dc (τ)? is then represented by ? ∫ ∞ 0 B(σ,τ) d σ?,called as constant in time DC component by us.?I dc (τ)? is proportional to the signal intensity ?B(σ).I dc (τ)? can not be filtered by any band pass ...