THE DEPENDENCE OF FRINGE CONTRAST ON PHASE STATISTICS IN SPECKLE CORRELATION INTERFEROMETRY

Object deformation-related phase measurements obtained using speckle c orrelation interferometry are limited by low fringe contrast factor va lues. In this paper, the statistical property of speckle phase - relat ed to conditions of scattering from optically rough surfaces - is outl ined to elucidate this factor. A series of computations using random n umber generation with a Gaussian deviate is performed to verify this a pproach and to obtain numerical estimates of the fringe contrast facto r.