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Title:
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Vibration measurement of miniature component by high-speed image-plane digital holographic microscopy.
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Author:
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Fu, Yu.; Shi, Hongjian.; Miao, Hong.
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Copyright year:
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2009 |
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Abstract:
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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. |
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Subject:
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DRNTU::Science::Physics::Optics and light. |
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Type:
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Journal Article |
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Series/ Journal Title:
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Applied Optics |
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Research Centre:
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Temasek Laboratories |
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Rights:
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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. |
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Version:
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Published version |
