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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/14047

Title: Development of a scanning head for laser Doppler vibrometry (LDV) using dual optical wedges
Authors: Rothberg, Steve
Tirabassi, Mario
Issue Date: 2013
Publisher: © AIP Publishing
Citation: ROTHBERG, S.J. and TIRABASSI, M., 2013. Development of a scanning head for laser Doppler vibrometry (LDV) using dual optical wedges. Review of Scientific Instruments, 84 (121704), 10pp.
Abstract: A new laser Doppler vibrometry scanning head is proposed based on a pair of rotating optical wedges. A comprehensive mathematical model is developed and used to demonstrate how the wedges can be configured to scan point-by-point, in a line, in a circle, and in a combination of the two such that a straight line scan could be performed on a structure during rotation. Inevitable misalignments are incorporated into the model and considered quantitatively for the circular tracking application. Certain advantages are apparent over systems based on dual mirrors and a Dove prism in terms of lower apparent velocities at low rotation orders. A scanning head design for the circular tracking application is presented, together with experimental data showing good agreement between predicted and measured apparent velocities caused by misalignments.
Description: Research data for this paper is available on request from Steve Rothberg (s.j.rothberg@lboro.ac.uk).
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council [EPSRC studentship].
Version: Published
DOI: 10.1063/1.4845555
URI: https://dspace.lboro.ac.uk/2134/14047
Publisher Link: http://dx.doi.org/10.1063/1.4845555
ISSN: 0034-6748
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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