Title: Heterodyne Speckle Interferometer for Full-field Velocity Profile Measurements of a Vibrating Membrane by Electronic Scanning
Authors: AGUANNO Mauro V.LAKESTANI FEREYDOUNWHELAN MAURICECONNELLY M.j.
Citation: OPTICS AND LASERS IN ENGINEERING vol. 45 p. 677-683
Publisher: ELSEVIER SCI LTD
Publication Year: 2007
JRC Publication N°: JRC42022
ISSN: 0143-8166
URI: http://dx.doi.org/10.1016/j.optlaseng.2006.12.001
http://publications.jrc.ec.europa.eu/repository/handle/JRC42022
DOI: 10.1016/j.optlaseng.2006.12.001
Type: Articles in Journals
Abstract: Dynamic deformation measurements were carried out by combining full-field speckle interferometry and heterodyne interferometry. A digital demodulation technique based on the evaluation of the instantaneous frequency have been implemented in the digital signal processor of a complementary metal-oxide semiconductor (CMOS)-based camera to extract velocity measurements from phase modulated optical carrier signals. The purpose of this experimental investigation was to demonstrate a full-field laser vibrometer system that could replace electro-mechanical scanning with electronic scanning within a programmable stand-alone and relatively low-cost digital camera. Velocity profiles of a vibrating membrane in the order of few microns per second were reconstructed automatically by performing an electronic scanning of the surface over the image sensor.
JRC Institute:Institute for Health and Consumer Protection

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.