Polarized digital shearography for simultaneous dual shearing directions measurements.
作者： Xin Xie , Cheok Peng Lee , Junrui Li , Boyang Zhang , Lianxiang Yang
DOI: 10.1063/1.4961473
关键词:
摘要: The selection of the direction sensitivity for digital shearography is determined by its shearing direction. As a result, directionally shaped defects could be missed in non-destructive testing using system with only one This paper reports polarized based on two Mach–Zehnder interferometers, which can create orthogonal directions and record shearograms simultaneously. are separated from each other proper polarization design so that no cross interference occurs. phase maps generated spatial shift methods through introduction different carrier frequencies use Fourier transform method. enabled simultaneous dual directional during continuous loading. Theory derivation, spectrum analysis, application results shown detail.
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