Vibration measurement of a miniature component by high-speed image-plane digital holographic microscopy
Applied Optics, Vol. 48, Issue 11, pp. 1990-1997 (2009)
http://dx.doi.org/10.1364/AO.48.001990
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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 image-plane 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.
© 2009 Optical Society of America
OCIS Codes
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(090.2880) Holography : Holographic interferometry
(110.0180) Imaging systems : Microscopy
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
ToC Category:
Holographic Interferometry
History
Original Manuscript: January 2, 2009
Revised Manuscript: March 18, 2009
Manuscript Accepted: March 20, 2009
Published: April 1, 2009
Citation
Yu Fu, Hongjian Shi, and Hong Miao, "Vibration measurement of a miniature component by high-speed image-plane digital holographic microscopy," Appl. Opt. 48, 1990-1997 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-11-1990
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