RECENT DEVELOPMENT IN INSTRUMENTATION OF AUTOMATED GRATING INTERFEROMETRY

High sensitivity grating interferometry has been proved to be the effe ctive experimental tool in mechanics and material science. However, re cent measurement requirements connected with new applications form sev eral challenging instrumentational and software requests, including an alysis of transient events, macro- and microscale measurement ability, measurements directly on a standard loading machine, full automatizat ion of acquisition of data and analysis of the results, interaction wi th FEM, BEM and other application oriented software. The paper present s the series of automated grating interferometers, including the labor atory, workshop and sensor-type systems which can alternatively fulfil the modern measurement requirements. The systems enable the adaptive fringe pattern design and automated analysis based on temporal spatial and spatial-carrier phase shifting techniques. The usefulness of auto mated grating interferometry systems is shown through wide selection o f recent applications, including fracture mechanics, residual stresses determination, relaxation processes, fatigue testing local material c onstant measurements and many others.