Time-averaged in-line digital holographic interferometry for vibration analysis
Applied Optics, Vol. 45, Issue 11, pp. 2391-2395 (2006)
http://dx.doi.org/10.1364/AO.45.002391
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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.
© 2006 Optical Society of America
OCIS Codes
(090.0090) Holography : Holography
(090.1760) Holography : Computer holography
(090.2880) Holography : Holographic interferometry
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
History
Original Manuscript: September 6, 2005
Revised Manuscript: October 13, 2005
Manuscript Accepted: October 17, 2005
Citation
Anand Asundi and Vijay Raj Singh, "Time-averaged in-line digital holographic interferometry for vibration analysis," Appl. Opt. 45, 2391-2395 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-11-2391
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