Suppression of fringe-modulating in-plane displacement fields in shearing speckle interferometry

摘要

Abstract: g speckle interferometry using the wedgearrangement yields displacement derivative fringes thatare modulated by in- plane displacement fields. In thispaper, it is found that using a biprism instead of awedge suppresses the in-plane displacement modulationeffect without affecting the visibility of thedisplacement derivative fringes.!5