A real-time digital shearing speckle interferometer

F. S. Chau, T. W. Ng

Research output: Contribution to journalArticleResearchpeer-review

24 Citations (Scopus)


Shearography is an interferometric method which measures surface displacement derivatives. Although useful for strain analysis and non-destructive testing, the conventional technique is cumbersome and not very suitable for an industrial environment. The authors present the development of an electronic/digital technique which eliminates most of the shortcomings. It enables real-time shearographic fringes to be obtained.

Original languageEnglish
Article number008
Pages (from-to)381-383
Number of pages3
JournalMeasurement Science and Technology
Issue number4
Publication statusPublished - 1 Dec 1992
Externally publishedYes

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