Laser Vibrometry meets laser speckle

Publication Type:
Conference Proceeding
Citation:
Proceedings of SPIE - The International Society for Optical Engineering, 2004, 5503 pp. 280 - 291
Issue Date:
2004-08-18
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This paper begins with a review of the fundamental mechanism by which speckle noise is generated in Laser Vibrometry before describing a new numerical simulation of speckle behaviour for prediction of noise level in a real measurement. The simulation data provides real insight into the phase and amplitude modulation of the Doppler signal as a result of speckle changes. The paper also includes experimental data looking at the influence of speckle noise in measurements on rotors with a selection of surface treatments and in scanning and tracking configurations.
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