Non-line-of-sight imaging based on laser range-gated imaging technology

Non-line-of-sightimagingisanewkindofimagingmoderecentlyproposedbyforigncountries, whichcanlookaroundcornersandbeyondthelineofsight.Inthispaper,theconceptofnon-line-of-sight imagingmodebasedonlaserrange-gatedimagingtechnologywasillustrated,someforeigntypical experimentsandexperimentresultsofitwerealsopresented.Then,therange-gatedimagingset-upinthe laboratory,employing532nmNd:YAGpulsedlaserandintensifiedchargecoupleddevice(ICCD),was utilizedtogetnon-line-of-sightimagesthroughthereflectionofglasswindowandceramictilewall. Experimentswerecarriedoutwithadistanceof50mand20mrespectively.Analysisoftheresultantimages showsthatthefeasibilityofnon-line-of-sightimagingisrelatedtothereflectionpropertiesofthereflection media,thatis,mediawithspecularreflectiontoacertainthresholdcanbeusedinnon-line-of-sightimaging. Finally,non-line-of-sightimagingtechnologywillbeanewpromisingopticalimagingmode,showinga potentialapplicationinurbanstreetfighting,publicsecurityreconnaissance,disasterrelief,andsoon.