Exact vibration amplitude derivative measurement with TV shearography

J. D R Valera, J. D C Jones, O. J. Løkberg

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


An electronic speckle shearing interferometer, or TV shearometer, characterized by a very small shear, has been used to measure the exact vibration amplitude derivative of a vibrating object. The technique is based on a heterodyne speckle shearing interferometer and uses fringe analysis methods appropriate when less than one fringe is observed on the vibrating object.

Original languageEnglish
Pages (from-to)918-921
Number of pages4
JournalMeasurement Science and Technology
Issue number6
Publication statusPublished - Jun 1996


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