[1] Van Haasteren A J P,Frankena H J.Real-time displacement measurement using a multicamera phasestepping speckle interferometer[J].J.Appl.Opt,1994,33(19):4137-4142.
[2] Weijers A L,Van Brug H,Frankena H J.Real time deformation measurement using a transportable shearoghaphy system[J].SPIE,1996,2921:76-81.