Line-focus-beam　ultrasonic　material　property　characterization　system　enables　accurate　measurements　on　the　phase　velocities　of　leaky　surface　acoustic　waves　(LSAW)　or　rayleigh-type　leaky　surface　acoustic　waves.　But　in　view　of　the　lens　of　the　conventional　acoustic　microscopy　is　expensive　and　difficult　to　produce,　new　method　of　design　and　fabrication　of　two　line-focus　lens-less　polyvinylidene　fluoride　(PVDF)　transducers　is　presented　for　acoustic　microscopy　system　utilizing　a　40　μm　thick　piezoelectric　PVDF　film　to　construct　the　active　element.　The　transducers　introduced　here　centre　around　5　MHz　and　11　MHz　respectively.　Different　from　high　cost　of　equipments　and　measuring　the　oscillation　period　Δz　on　an　operation　of　tone-burst　mode,　an　improved　V(f,　z)　method　based　on　tow-dimensional　Fourier　transform　is　developed　for　the　broadband　measurements.　A　defocusing　system　for　measuring　surface　acoustic　waves　is　established　and　a　non-contact　immersion　experiment　of　a　polished　fused　quartz　is　carried　out.　The　LSAW　velocity　extracted　by　V(f,　z)　analytical　technique　is　compared　with　the　theoretical　one　and　they　both　are　in　good　agreement.　©　2011　Journal　of　Mechanical　Engineering.