Synchronized reference updating technique for electronic speckle interferometry

Bruno Pouet*, Tom Chatters, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

In this paper, a video-based speckle interferometric method using a continuous reference updating technique is presented. Unlike conventional ESPI techniques, this method synchronizes the optical interferometric detection system with the acoustic stressing of the test object, and includes continuous renewal of the reference image. It is shown that the susceptibility of the method to environmental noise caused by vibration, temperature gradients, or thermal currents is substantially lower than that of conventional techniques. The application of this technique to the detection of defects in adhesively bonded structures is demonstrated.

Original languageEnglish (US)
Pages (from-to)133-138
Number of pages6
JournalJournal of Nondestructive Evaluation
Volume12
Issue number2
DOIs
StatePublished - Jun 1 1993

Keywords

  • Electronic speckle interferometry
  • nondestructive evaluation of disbonds

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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