脉冲时间分辨傅里叶变换红外发射光谱

S. Leone, T. R. Fletcher, E. Woodbridge
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引用次数: 1

摘要

各种时间分辨傅立叶变换红外(FTIR)技术已经在文献中描述。1-11基本概念是触发一个瞬态事件,如化学光解,例如用灯或激光,并在触发事件后的特定时间延迟用傅里叶变换干涉仪获得吸收或发射振幅。一种方法是将镜像移动到一个新的固定位置,并在每个位置进行时间分辨跟踪。这种方法的难点在于镜面位置在这种“步进停止”操作模式下的长期仪器稳定性。2-4另一种方法允许镜像快速连续扫描,在单个触发事件之后多次收集数据作为镜像扫描。干涉图中触发发生的点是变化的,因此可以在所有镜像位置和时间获得数据。然后,这些数据被用于在触发事件之后的许多不同时间延迟处构建干涉图。这种方法有时被发现有伪影,如果有抖动在镜的扫描速度或如果启动源的振幅不是恒定的
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pulsed Time-Resolved Fourier Transform Infrared Emission Spectroscopy
A variety of time-resolved Fourier transform infrared (FTIR) techniques have been described in the literature.1–11 The basic concept is to trigger a transient event such as a chemical photolysis, for example with a lamp or a laser, and to acquire absorption or emission amplitudes with the Fourier transform interferometer at specific time delays after the triggering event. One method steps the mirror to a new fixed position and takes a time-resolved trace at each position. The difficulty with this method comes in the long-term instrument stability of the mirror position in this "step and stop" mode of operation.2–4 Another method allows the mirror to sweep rapidly and continuously, and data at a number of times after a single triggering event are collected as the mirror sweeps. The point in the interferogram where the trigger occurs is varied, so that data are obtained at all mirror positions and times. These data are then used to construct interferograms at a number of different time delays after the triggering event. This method has sometimes been found to have artifacts if there is Jitter in the sweep speed of the mirror or if the amplitude of the initiating source is not constant.5
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