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Vibration detection using focus analysis of interferograms |
Applied Optics, Vol. 51, Issue 9, pp. 1431-1435 (2012)
http://dx.doi.org/10.1364/AO.51.001431
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Abstract
This paper proposed an automated technique for vibration detection using statistical focus measure to evaluate interferogram contrast. An interferogram sequence from a Mach-Zehnder interferometer setup is recorded (frame rate: 24 fps) and the gray-level variance (GLVA) is plotted versus time. Occurrence of induced vibration in the setup causes a decrease in the interferogram contrast which, in turn, manifests as an evident rapid drop in the variance plot. The technique is demonstrated experimentally using periodic microvibrations (frequency range,
© 2012 Optical Society of America
OCIS Codes
(040.7290) Detectors : Video
(100.2960) Image processing : Image analysis
(100.5010) Image processing : Pattern recognition
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
ToC Category:
Detectors
History
Original Manuscript: November 21, 2011
Revised Manuscript: January 9, 2012
Manuscript Accepted: January 9, 2012
Published: March 20, 2012
Citation
Jae Lord Dexter C. Filipinas and Percival F. Almoro, "Vibration detection using focus analysis of interferograms," Appl. Opt. 51, 1431-1435 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-9-1431
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