Laser vibrometry meets laser speckle
conference contributionposted on 22.01.2010 by Steve Rothberg, Ben Halkon
Any type of content contributed to an academic conference, such as papers, presentations, lectures or proceedings.
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