Full-Field Laser Vibrometer for Instantaneous Vibration Measurement and Non-Destructive Inspection
We describe a system for real-time, full-field vibrometry, incorporating features of high-speed electronic speckle pattern interferometry (ESPI) and laser Doppler velocimetry (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 to the full-field study of transient vibrations and rapid non-destructive inspection of composite materials.
Yuri Chugui, Yongsheng Gao, Kuang-Chao Fan, Roald Taymanov and Ksenia Sapozhnikova
J. M. Kilpatrick and V. B. Markov, "Full-Field Laser Vibrometer for Instantaneous Vibration Measurement and Non-Destructive Inspection", Key Engineering Materials, Vol. 437, pp. 407-411, 2010