基于傅里叶变换光谱技术的Zoom-FFT算法研究  

Zoom-FFT based on Fourier transform spectroscopy

作　　者：张茗璇[1] 高教波[1] 孟合民[1] 范喆[1] 郑雅卫[1] 李俊娜[1] 

机构地区：[1]西安应用光学研究所,陕西西安710065

出　　处：《应用光学》2013年第3期452-456,共5页Journal of Applied Optics

摘　　要：在分析经典的Zoom-FFT算法基础上,提出一种基于傅里叶变换光谱技术的Zoom-FFT算法,用matlab仿真常规FFT算法和Zoom-FFT算法,对不同采样步长的干涉条纹进行数据处理,通过反演出的光谱曲线图和原始光谱曲线图可以看出:采样步长小于20μm时,FFT和Zoom-FFT算法都可以反演出光谱;而当采样步长大于20μm且小于33.3μm时,FFT算法未能反演出光谱,而Zoom-FFT算法仍然可以反演出光谱。Based on the analysis of the classical Zoom-FFT, a Zoom-FFT algorithm based on Fourier transform spectroscopy was presented. Both FFT and Zoom-FFT were used to process the interferogram with different sampling steps by Matlab simulation software, through the comparison of the inverted and original spectrum curves, it indicated that the spectrum could be inverted by both FFT and Zoom-FFT when the sampling step was less than 20 μm But when the sampling step was greater than 20μm and less than 33.3μm, the spectrum could not be inverted by FFT algorithm, while the spectrum could be inverted by Zoom-FFT.

关 键 词：傅里叶变换光谱技术 采样定理 采样步长 FFT Zoom—FFT 

分 类 号：TN202[电子电信—物理电子学]