Full-field vibrometry with digital Fresnel holography
Applied Optics, Vol. 44, Issue 27, pp. 5763-5772 (2005)
http://dx.doi.org/10.1364/AO.44.005763
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Abstract
A setup that permits full-field vibration amplitude and phase retrieval with digital Fresnel holography is presented. Full reconstruction of the vibration is achieved with a three-step stroboscopic holographic recording, and an extraction algorithm is proposed. The finite temporal width of the illuminating light is considered in an investigation of the distortion of the measured amplitude and phase. In particular, a theoretical analysis is proposed and compared with numerical simulations that show good agreement. Experimental results are presented for a loudspeaker under sinusoidal excitation; the mean quadratic velocity extracted from amplitude evaluation under two different measuring conditions is presented. Comparison with time averaging validates the full-field vibrometer.
© 2005 Optical Society of America
OCIS Codes
(090.0090) Holography : Holography
(090.2880) Holography : Holographic interferometry
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4630) Instrumentation, measurement, and metrology : Optical inspection
Citation
Julien Leval, Pascal Picart, Jean Pierre Boileau, and Jean Claude Pascal, "Full-field vibrometry with digital Fresnel holography," Appl. Opt. 44, 5763-5772 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-27-5763
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