Toward double-pulse digital shearography

Wolfgang Steinchen; Lian Xiang Yang; Gerhard Kupfer; Peter Maeckel; Frank Voessing

doi:10.1117/12.326647

9 October 1998 Toward double-pulse digital shearography

Wolfgang Steinchen, Lian Xiang Yang, Gerhard Kupfer, Peter Maeckel, Frank Voessing

Author Affiliations +

Proceedings Volume 3418, Advances in Optical Beam Characterization and Measurements; (1998) https://doi.org/10.1117/12.326647
Event: Lasers and Materials in Industry and Opto-Contact Workshop, 1998, Quebec, Canada

Abstract

The holographic and photoelastic method have been extensively applied for the analysis of the transient vibrations. Shearography as a relative new technique compared with holography and photoelasticity, provides an alternative method for the measurement of the transient vibration. The special appeal of the shearography is that (a) it can measure strain waves directly on the object surface to be studied (compared with photoelasticity and (b) it is relatively immune to ambient interruptions and provides a wider and more controllable range of sensitivity (compared with holography). Although the ambient interruption is not a critical problem for the transient vibration measurement due to the application of the double pulse technique, the wider and more controllable range of sensitivity makes it possible to measure the relative large vibration which is beyond the measuring range of holography. In this paper, these measuring methods are compared and the developmental steps of shearography for the transient vibration measurement are represented.

Citation Download Citation

Wolfgang Steinchen, Lian Xiang Yang, Gerhard Kupfer, Peter Maeckel, and Frank Voessing "Toward double-pulse digital shearography", Proc. SPIE 3418, Advances in Optical Beam Characterization and Measurements, (9 October 1998); https://doi.org/10.1117/12.326647

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