Research progress of terahertz time-domain spectral imaging system
Terahertz time-domain spectroscopic imaging technology has significant features such as penetration,ultra-fast time resolution,fingerprint spectral characteristics,and safe non-ionizing radiation,making it uniquely valuable for spectral analysis of material composition and non-destructive testing of industrial materials,and has become a research hotspot in recent years.This paper introduced from two directions of imaging system and imaging algorithm.At the imaging system level,it comprehensively introduced two-dimensional imaging methods such as point-by-point scanning imaging,terahertz focal plane imaging,and terahertz photoconductive array imaging,as well as terahertz near-field imaging technology that broke through the diffraction limit.At the imaging algorithm level,three-dimensional imaging methods such as time-of-flight imaging and tomographic scanning imaging were introduced.Also,the applications of terahertz technology in biomedical,non-destructive testing were listed,security inspection,and other fields.Finally,the challenges faced of current terahertz time-domain spectroscopy technology were summarized.
NETL
NSTL
万方数据
维普
