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Non-contact vibration analysis using speckle-based techniques

Abstract: In this work, two different speckle based techniques are employed to quantify the movement of a vibrating surface. Directly projecting a coherent laser to a rough surface and collecting its associated subjective speckle using a high-speed camera, different frequencies are detected successfully. For the same purpose, a speckle pattern created by launching a coherent laser within a multimode fiber is employed as structured light to detect changes into the projection surface. The achieved results suggest that subjective speckle is better to analyze small sized areas, even at relative high frequencies, while projected speckle can give information about wider areas.

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Authorship: Robles-Urquijo I., Lomer M., Rodriguez-Cobo L., Lopez-Higuera J.,

Congress: International Conference on Optical Fiber Sensors: OFS (25ª : 2017 : Jeju, República de Corea)

Publisher: SPIE Society of Photo-Optical Instrumentation Engineers

Year of publication: 2017

No. of pages: 4

Publication type: Conference object

DOI: 10.1117/12.2265398

ISSN: 0277-786X,1996-756X

Spanish project: TEC2013-47264-C2 ; TEC2016-76021-C2

Publication Url: https://doi.org/10.1117/12.2265398

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Authorship

IGNACIO ROBLES URQUIJO

MAURO MATIAS LOMER BARBOZA

LUIS RODRIGUEZ COBO

JOSE MIGUEL LOPEZ HIGUERA

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