Xiaoping Wu

TL;DR: By employing the dynamic digital speckle pattern interferometry (DSPI) technique, three types of Portevin-Le Chatelier (PLC) effects were investigated systematically, with emphasis on the temporal and spatial dynamic features as discussed by the authors.

TL;DR: In this article, the spatio-temporal dynamics of the Portevin-Le Chatelier deformation bands are investigated by a novel digital speckle pattern metrology technique consisting of DSPI and DSC.

TL;DR: A simple and effective interpolation bias prediction approach, which exploits the speckle spectrum and the interpolation transfer function, is proposed and both numerical simulations and experimental results are found to agree with theoretical predictions.

TL;DR: In this article, a novel digital speckle pattern metrology technique including DSPI and DSC has been applied to investigate the spatial features (geometrical shape, localized plastic deformation in band) and dynamic characteristics (propagation of the bands, details of the band migration) of the PLC deformation bands in Al-4 polycrystals simultaneously and quantitatively.

TL;DR: A 320 × 240 aluminum PMA fabricated by electron beam lithography is described in this paper and the extinction ratio of 75 and the maximum polarization transmittance of 78% demonstrate that the PMA is suitable for polarization imaging.