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Vibration measurement of miniature component by high-speed image-plane digital holographic microscopy

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Vibration measurement of miniature component by high-speed image-plane digital holographic microscopy

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Title: Vibration measurement of miniature component by high-speed image-plane digital holographic microscopy
Author: Fu, Yu; Shi, Hongjian; Miao, Hong
Copyright year: 2009
Abstract: Measuring deformation of vibrating specimens whose dimensions are in the submillimeter range introduces a number of difficulties using laser interferometry. Normal interferometry is not suitable because of a phase ambiguity problem. In addition, the noise effect is much more serious in the measurement of small objects because a high-magnification lens is used. We present a method for full-field measurement of displacement, velocity, and acceleration of a vibrating miniature object based on image-plane digital holographic microscopy. A miniature cantilever beam is excited by a piezoelectric transducer stage with a sinusoidal configuration. A sequence of digital holograms is captured using a high-speed digital holographic microscope. Windowed Fourier analysis is applied in the spatial and spatiotemporal domains to extract the displacement, velocity and acceleration. The result shows that a combination of imageplane digital holographic microscopy and windowed Fourier analyses can be used to study vibration without encountering a phase ambiguity problem, and one can obtain instantaneous kinematic parameters on each point.
Subject: DRNTU::Science::Physics::Optics and light
Type: Journal Article
Series/ Journal Title: Applied Optics
Research Centre: Temasek Laboratories
Rights: This paper was published in [Applied Optics] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=ao-48-11-1990]. Systematic or multiple reproduction or distribution to multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Version: Published version

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