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Time-averaged in-line digital holographic interferometry for vibration analysis

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Time-averaged in-line digital holographic interferometry for vibration analysis

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Title: Time-averaged in-line digital holographic interferometry for vibration analysis
Author: Anand, Asundi; Singh, Vijay Raj
Copyright year: 2006
Abstract: Time-averaged in-line digital holography is applied for vibration analysis. In particular, by use of a double-exposure approach, simultaneous determination of vibration mode shape and mean static state deformation during a vibration cycle are obtained. The subtraction of two numerically reconstructed digital holograms recorded at the same resonant frequency but with a small difference in amplitude shows the mixing of Bessel-type time-averaged fringes owing to vibration and of the double-exposure fringes owing to differences in the mean deformation of the object. It is shown that separation of these fringe patterns can be readily accomplished numerically. An experimental demonstration of this effect by use of in-line digital holography for relatively small membranes is demonstrated.
Subject: DRNTU::Science::Physics::Optics and light.
Type: Journal Article
Series/ Journal Title: Applied optics
School: School of Mechanical and Aerospace Engineering
Version: Accepted version

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