High Speed Non-destructive Testing Method Using Digital Holographic Interferometry

摘要

Non-destructive measurement of deformation and strain using optical interferometric techniques relies on phase derivative estimation from a fringe pattern. This paper proposes a fast phase derivative retrieval technique in digital holographic interferometry using 2D space-frequency distribution expedited by compute unified device architecture and graphics processing unit. Experimental results and computational time comparison are shown to authenticate the speed-up of the space-frequency method with the aid of graphics processing unit.