For　wide　range　defect　detection　in　plate,　acoustic　beam　optimization　technique　was　investigated.　The　synthesis　wave　field　obtained　from　the　basic　phased-addition　is　prone　to　be　influenced　by　the　noise　and　the　resolution　is　low.　To　improve　the　performance　of　beam　forming　of　array,　the　synthesis　acoustic　field　is　processed　with　amplitude　weighting.　The　experimental　data　have　been　processed　with　phase　shift　and　amplitude　weighted　optimization.　It　is　shown　that　the　proposed　beam　forming　technique　with　transducer　array　can　recognize　the　features　in　plate.