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, Adela Apostol, 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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