Vibration analysis by digital speckle pattern shearing interferometry

Wolfgang Steinchen; Lian Xiang Yang; Gerhard Kupfer; Peter Maeckel; Anderas Thiemich

doi:10.1117/12.281155

17 September 1997 Vibration analysis by digital speckle pattern shearing interferometry

Wolfgang Steinchen, Lian Xiang Yang, Gerhard Kupfer, Peter Maeckel, Anderas Thiemich

Proceedings Volume 3098, Optical Inspection and Micromeasurements II; (1997) https://doi.org/10.1117/12.281155
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

Abstract

Digital speckle pattern shearing interferometry is described as a robust measuring method due to its simple optical setup and the insensitivity against ambient noise. It has been sued in industry for nondestructive testing and strain measuring. This paper explores the possibilities for vibration analysis using digital speckle pattern shearing interferometry. The measuring device performing both time- average and stroboscopic methods is described. The time average digital speckle patten shearing interferometry in conjunction with the stroboscopic technique is suited well for both qualitative and quantitative vibration analyses. The determination of dynamic deformation and strain fields form the phase map of shearogram is demonstrated, and some preliminary results are shown.

Citation Download Citation

Wolfgang Steinchen, Lian Xiang Yang, Gerhard Kupfer, Peter Maeckel, and Anderas Thiemich "Vibration analysis by digital speckle pattern shearing interferometry", Proc. SPIE 3098, Optical Inspection and Micromeasurements II, (17 September 1997); https://doi.org/10.1117/12.281155

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