简介：Diffractiveopticsisanimportanttechniqueforbeamshapingwithhighlightefficiencyandstrongdiffractionpatternflexibility.Sincethediffractionangleislimitedbytheunitsizeofthediffractiveopticalelement(DOE),thesizeoftherequireddiffractionpatternisalwaysrathersmall.InthisLetter,refractive/diffractivehybridopticalelements(RDHOEs)consistingofaDOEandalensareusedtorealizebeamshapingforalargediffractionpattern.Thelens,asthecomponentoftheRDHOEs,cannotonlybeconcavebutalsoconvex,andthedoublesamplingFresneldiffractionalgorithmisdevelopedforthedesignofthesetwotypesofRDHOEs.Thesimulationandexperimentalresultsprovidesolidevidencetodemonstratetheproposedmethodwiththepurephasespatiallightmodulator.