Theories and industrial applications of optical interferometric NDT techniques: A Review

摘要: Optical techniques are based on the development of laser, imaging sensors and computer technologies with a view to providing full-field non-contacting measurement surface profiles deformations. They categorised in three groups: moire, holography speckle-based techniques. These optical have been used material characterisation, defects detection, strain measurement, design verification/optimisation, residual stress evaluation, vibration analysis 3D shape measurement. In this paper, principles these overviewed first, their advantages disadvantages highlighted. Compared other non-destructive testing techniques, reveal an object by assessing response deformation under stressing, which is closely correlated strength integrity object. Not only modes could be determined, strains stresses field associated quantified as well. Therefore, attracted increasing interestfrom NDT community past decade, applied range industrial sectors meet demanding various engineering components structures.