17 June 2009 Nondestructive testing of aerospace composites with an infrared matrix laser vibrometer
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Abstract
We describe a hybrid system for real-time, full-field vibrometry, incorporating features of high-speed electronic speckle pattern interferometry (ESPI) and laser Doppler vibrometry (LDV). Based on a 2D interferometric sensor array, comprising 16 × 16 parallel illumination and detection channels, the matrix laser vibrometer (MLV), captures full-field data instantaneously, without beam scanning. The instrument design draws on the advantages of scale offered by modern telecommunications fiber optic and digital electronics. The resulting architecture, comprising a compact measurement probe linked by fiber optic umbilical to a remote electronics unit, facilitates practical application of the system in fullfield measurement of transient vibrations and rapid non destructive testing of composite materials.
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James Kilpatrick, James Kilpatrick, Adela Apostol, Adela Apostol, Vladimir Markov, Vladimir Markov, } "Nondestructive testing of aerospace composites with an infrared matrix laser vibrometer", Proc. SPIE 7389, Optical Measurement Systems for Industrial Inspection VI, 73893F (17 June 2009); doi: 10.1117/12.828570; https://doi.org/10.1117/12.828570
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