Title
Displacement measurements over a square meter area using digital holographic interferometry Displacement measurements over a square meter area using digital holographic interferometry
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bellingham, Wash. ,
Subject
Physics
Source (journal)
Optical engineering / Society of Photo-Optical Instrumentation Engineers. - Bellingham, Wash.
Volume/pages
53(2014) :9 , 9 p.
ISSN
0091-3286
0091-3286
Article Reference
092009
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Current industrial demand for optical nondestructive testing includes the displacement analysis of large object areas. This paper reports on the use of a digital holographic interferometer to measure displacements over an area of 1.14 m(2). The object under study is a framed working table covered with a Formica layer fixed to a granite bench, and it is observed and illuminated employing a high speed and high resolution camera and a continuous wave high output power laser, respectively. A stabilization procedure needs to be established as long illumination distances are required in order to retrieve the entire surface optical phase during a series of continuous deformations. As a proof of principle, two different tests are presented: the first involves a slow continuous loading process and the second a vibration condition. The wrapped phase and displacement maps are both displayed. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
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