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