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1、weekendingPRL103,243902(2009)PHYSICALREVIEWLETTERS11DECEMBER2009DiffractiveImagingUsingPartiallyCoherentXRaysL.W.Whitehead,G.J.Williams,H.M.Quiney,D.J.Vine,R.A.Dilanian,S.Flewett,andK.A.NugentSchoolofPhysics,TheUniversityofMelbourne,Victoria3010,Austr
2、aliaA.G.PeeleandE.BalaurDepartmentofPhysics,LaTrobeUniversity,Bundoora,Victoria3086,AustraliaI.McNultyAdvancedPhotonSource,ArgonneNationalLaboratory,9700SouthCassAvenue,Argonne,Illinois,60439,USA(Received26August2009;revisedmanuscriptreceived18Novembe
3、r2009;published11December2009)Themeasuredspatialcoherencecharacteristicsoftheilluminationusedinadiffractiveimagingexperimentareincorporatedinanalgorithmthatreconstructsthecomplextransmissionfunctionofanobjectfromexperimentalx-raydiffractiondatausing1.
4、4keVxrays.Conventionalcoherentdiffractiveimaging,whichassumesfullspatialcoherence,isalimitingcaseofourapproach.Evenincasesinwhichthedeviationfromfullspatialcoherenceissmall,wedemonstrateasignificantimprovementinthequalityofwavefieldreconstructions.Ourfo
5、rmulationisapplicabletox-rayandelectrondiffractionimagingtechniquesprovidedthatthespatialcoherencepropertiesoftheilluminationareknownorcanbemeasured.DOI:10.1103/PhysRevLett.103.243902PACSnumbers:42.30.Wb,07.85.Qe,42.25.Kb,42.30.RxCoherentdiffractiveim
6、aging(CDI)isamethodbyportedtoconvergeconsistently[14].InthisLetterwewhichthetransmissionfunctionofanonperiodicobjectdevelopamethodthatliftstherestrictiontofullycoherentisrecoveredfromitsx-raydiffractionpattern[1].ThefiniteilluminationinCDI,anddemonstra
7、tetheeffectivenessofextentofthescatteringobjectestablishestheuniquenessoftheapproachbyrecoveringimagesfrompartiallycoherentthemappingbetweenthewavefieldthatexitstheobjectdiffractiondataobtainedwithanundulatorsource.Ouranditsfar-zonediffractionpattern[2
8、].Thisrelationshipismethodwillopenthewaytocoherentimagingusinglessdeterminediteratively,imposingwhateveraprioriinfor-coherentsources.Examplesoffurtherapplicationsincludemationisavailableontheformofthecomplexwavefieldelectrondiffraction[15]forat
