Speckle-shearing interferometric technique: A full-field strain gauge

Y. Y. Hung, R. E. Rowlands, I. M. Daniel

Research output: Contribution to journalArticlepeer-review

74 Scopus citations


An improved speckle-shearing interferometric method is presented that allows simultaneous determination of derivatives of surface displacements of a structure with respect to four different directions. The technique relaxes several limitations associated with conventional interferometry and thus is adaptable to nonlaboratory environments. The relevant theory is presented, and the method demonstrated by determining spatial derivatives of in-plane and out-of-plane displacements of statically loaded and vibrated structures.

Original languageEnglish (US)
Pages (from-to)618-622
Number of pages5
JournalApplied optics
Issue number3
StatePublished - Mar 1975

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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