A fully automated algorithm was developed for the recording and analysis of vibrating objects with the help of digital speckle pattern interferometry utilizing continuous-wave laser light. A series of measurements were performed with increasing force inducing vibration to allow the spatial distribution of vibration amplitude to be reconstructed on the object’s surface. The developed algorithm uses Hilbert transformation for an independent, quantitative evaluation of the Bessel function at every point of the investigated surface. The procedure does not require phase modulation, and thus can be implemented within any, even the simplest, DSPI apparatus. The proposed deformation analysis is fast and computationally inexpensive.
© 2012 Optical Society of America
Original Manuscript: March 27, 2012
Revised Manuscript: June 10, 2012
Manuscript Accepted: June 11, 2012
Published: July 16, 2012
Leszek Krzemien and Michal Lukomski, "Algorithm for automated analysis of surface vibrations using time-averaged digital speckle pattern interferometry," Appl. Opt. 51, 5154-5160 (2012)