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Title
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Displacement measurements over a square meter area using digital holographic interferometry
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Author
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Abstract
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| 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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Language
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English
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Source (journal)
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Optical engineering / Society of Photo-Optical Instrumentation Engineers. - Bellingham, Wash.
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Publication
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Bellingham, Wash.
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2014
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ISSN
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0091-3286
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DOI
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10.1117/1.OE.53.9.092009
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Volume/pages
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53
:9
(2014)
, 9 p.
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Article Reference
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092009
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ISI
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000339569400008
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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