Laser vibrometry meets laser speckle
conference contributionposted on 22.01.2010, 12:23 by Steve RothbergSteve Rothberg, Ben Halkon
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.
- Mechanical, Electrical and Manufacturing Engineering