Fourier transform imaging spectroscopy
Jinsong Zhou, Yu Fang, Min Huang, Bin Xiangli, Qunbo Lv, Qisheng Cai
Abstract
Imaging spectrometry can obtain both geometric image and spectral radiation of targets. Prisms, gratings, and interferometers are often used for light decomposition. Fourier transform imaging spectroscopy (FTIS) is based on light interference to obtain interferograms of the target and reconstruct the spectra using the Fourier transform method. FTIS has numerous advantages, including high throughput and spectral resolution and multiplex. It is a hotspot in the field of imaging spectroscopy and has been established in three types, namely, temporally modulated, spatially modulated, and temporally-spatially modulated. FTIS has been widely used in various fields, including industry, agriculture, scientific research, biomedicine, atmospheric detection, environmental monitoring, and resource investigation. In this paper, the basic principle of FTIS based on the Michelson interferometer is briefly introduced. Typical techniques for different modulation types and remote sensing applications are also presented.