tostudythecarriercausedMTFandcalculatedMTFrelationalexpressioncausedbycarrierdiffusion.Fourth,thestudyoftherelationshipbetweentheopticalcrosstalkMTFundernodiffractioneffectsduetoextrinsicdetectormodelusesthelinespreadfunctiontheory.Onthebasisofthesetwopartsofthestudyabove,thecalculatedmodeloftherelationshipbetweenanidealstateoftotalcrosstalkandMTF.Fifth,Dtransferfunctionarecalculatedandanalyzed.Finally,thispaper,binedwiththeinferredrelationshipimageMTFcurvesobtainedwithvariousinfluencingfactors,qualitativeanalysisofthespecificimpactofthreefactorsontheMTF.HowtobalancetheresultingimpactfactortoreducetheimpactontheMTF,thusimprovingtheperformanceofinfraredimagingdetectors.Keywords:ChargeCoupledDevice,ModulationTransferFunction,Carrierdiffusion,CrosstalkTypeofDissertation:AppliedBasicTechnology