Recent applications of TV holography and shearography

Nandigana K. Krishna Mohan; Henrik O. Saldner; Nils-Erik Molin

doi:10.1117/12.245173

19 July 1996 Recent applications of TV holography and shearography

Nandigana K. Krishna Mohan, Henrik O. Saldner, Nils-Erik Molin

Proceedings Volume 2861, Laser Interferometry VIII: Applications; (1996) https://doi.org/10.1117/12.245173
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

TV holography is used to measure the components of the deformation vector, whereas TV shearography is used to obtain the derivatives of the displacement components. In this paper, we highlight a novel approach to split the CCD into two parts which enables to extract entirely different information from a single experimental configuration. A holo-shearography configuration provides simultaneous measurement of out-of-plane displacement and its slope change in real time. Similarly a holo-comparative configuration multiplexes an out-of-plane displacement configuration and a comparative interferometric configuration. Few experimental results using both these configurations are presented. In addition TV holography is implemented for vibration studies on an Indian classical musical instrument--Veena. The preliminary studies on a model veena are demonstrated.

Citation Download Citation

Nandigana K. Krishna Mohan, Henrik O. Saldner, and Nils-Erik Molin "Recent applications of TV holography and shearography", Proc. SPIE 2861, Laser Interferometry VIII: Applications, (19 July 1996); https://doi.org/10.1117/12.245173

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