干涉 iEt/h+计(p+qA/c)d YoR (D,t)=Ne OFD OG(P+q/ c)dI -iEt/h+i( OG D (D, t)=yoR (D, t)+yoG ( D, t) Ne-iEtth (p+gA/c)'dl (p+ga/c)' dl JOFD e OGD干涉 ( ) ( , ) ( , ) ( , ) ( , ) ( , ) ( / ) ( / ) / / ( / ) / ( / )  +  =  = +  =  = +  +  − − + +  − + +  OFD OGD OGD OFD i p qA c dl i p qA c dl iEt O F O G iEt i p qA c dl O G iEt i p qA c dl O F N e e e D t D t D t D t N e D t N e                   