干涉光谱重建中的相位误差检测方法对比研究

干涉条纹相位误差检测与校正是傅里叶变换光谱重建中的关键技术之一。本文对同步 法、傅里叶变换法和局部傅里叶变换法三种典型干涉条纹相位误差检测方法的效果进行了对 比研究。仿真及实际数据实验发现上述方法在处理缓变与快变的干涉条纹相位误差及干涉条 纹有噪声时存在很大差异:同步法适宜于处理相位误差缓变的干涉条纹,而傅里叶变换法和 加窗傅里叶变换法适用于处理相位误差快变的情况；傅里叶变换法在高信噪比情况下具有较 好的性能,加窗傅里叶变换法在低信噪比下具有较强的鲁棒性。

The performance comparison of fringe phase error detection methods for interference spectrum reconstruction

Detection and correction of fringe phase error is one of the key point s in Fourier transform spectrometers.The carrier phase synchronization,Fourier transform an d Windowed Fourier transform are three major fringe phase error detection methods.The perf ormance comparison of them is carried out by the paper and some beneficial results are f ound through simulation and experiment.There are big difference between them when detecting slow varying and fast varying phase error in the noise.The carrier phase synchronization met hod is suited to detect slow varying fringe phase error while Fourier transform and Windowed Four ier transform methods are suited to detect fast varying fringe phase error.Fourier transform method can get better result in high level of signal noise ratio and Windowed Fourier transform method is more robust in low level of signal noise ratio.