Optics-mechanics analysis method about the coupled fringe pattern of off-plane displacement and slope in shadow moiré;

Distribution and evolution of shear strain rate,in-and off-plane displacements in free surfaces were investigated.

Laser speckle photogrammetry technology can measure the superficial deformation without reference light,is advanced than the traditional holography,but traditional speckle metrology technology is not efficient in the measure of out-of-plane displacement,it is mostly used in the measure of in-plane displacement.

The beam path of Electronic speckle pattern interferometry(ESPI) was set up and a typical out-of-plane displacement of metals sample was obtained.

In order to measure the thermal deformation of mechanical parts in processing, testing and using, this paper proposes a portable speckle measuring method for the measurement of out-of-plane displacement.

The reflective high sensitivity moire interferometry was applied to measure out of plane displacement fields in ferroelectric ceramics.

It expounds the interferometry principle of Lengthways Displacement measurement,getting the 3-D lengthways displacement using CCD technology and image processing sofeware.

It combines with accelerated stress lifetime test to obtain the thermal off-surface displacement of chip under three different lasting accelerated stress working condition.