Please use this identifier to cite or link to this item: https://zone.biblio.laurentian.ca/handle/10219/2869
Title: Development of a new velocity measurement technique : the laser bessel velocimetry
Authors: Sakah, Mahmud Ali
Item Type: Thesis
Degree: Master of Science (MASc) in Engineering
Keywords: velocity measurement optical technique system;scattered light detection;Bessel beam;Laser Bessel velocimetry (LBV);LDV system;refractive linear axicons
Issue Date: 20-Jul-2015
Abstract: The present thesis describes the design, construction and testing of a new velocity measurement optical technique system. The technique has similarities with the laser Doppler velocimetry (LDV) in that it uses scattered light detection, in order to measure one component of the velocity vector of moving flows or solid surfaces. It uses the fringes of a Bessel beam produced by an axicon to generate the measurement volume. This technique, which we call Laser Bessel velocimetry (LBV), is noninvasive and permits continuous velocity measurements of moving particles. The experimental measurement set-up including the laser source, the optical devices, a moving stage with known velocities, a photodetector to capture scattered light and signal processing and data acquisition components, was developed and used to provide a proof of concept of this new technique. The set-up was also tested with a commercial LDV system. Two types of refractive linear axicons have been used to generate a Bessel type beam by illuminating the axicons with blue and red collimated and coherent laser light of dissimilar wavelengths, λ. The linear axicons offer the advantage of simplicity. The software tools for measurements, acquisition and analysis of the data are developed using NI Labview and MATLAB. Results from both theoretical simulation and experimental measurements are presented and compared.
URI: https://zone.biblio.laurentian.ca/handle/10219/2869
Appears in Collections:Master's Theses
Master's Theses

Files in This Item:
File Description SizeFormat 
CompleteThesisAfterDefence_2.pdf3.48 MBAdobe PDFView/Open


Items in LU|ZONE|UL are protected by copyright, with all rights reserved, unless otherwise indicated.