Full-field optical strain measurement having postrecording sensitivity and direction selectivity - A coherent optical technique is described which allows for strain determination along any direction and with variable sensitivity using a single photographic recording (shearing-specklegram)

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

doi:10.1007/BF02324500

Full-field optical strain measurement having postrecording sensitivity and direction selectivity - A coherent optical technique is described which allows for strain determination along any direction and with variable sensitivity using a single photographic recording (shearing-specklegram)

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

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

An optical method of strain measurement is described which possesses numerous advantages over conventional and holographic interferometry. The method consists of imaging the coherently illuminated object by a lens, and double-exposing a photographic plate in a misfocused image plane before and after deformation of the object. The processed photographic plate or 'specklegram' is subsequently Fourier-filtered to provide fringe patterns representing derivatives of surface displacements with respect to any desired direction and with variable and controllable sensitivity.

Original language	English (US)
Pages (from-to)	56-60
Number of pages	5
Journal	Experimental Mechanics
Volume	18
Issue number	2
DOIs	https://doi.org/10.1007/BF02324500
State	Published - Feb 1978

ASJC Scopus subject areas

Aerospace Engineering
Mechanics of Materials
Mechanical Engineering

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Hung, Y. Y., Daniel, I. M., & Rowlands, R. E. (1978). Full-field optical strain measurement having postrecording sensitivity and direction selectivity - A coherent optical technique is described which allows for strain determination along any direction and with variable sensitivity using a single photographic recording (shearing-specklegram). Experimental Mechanics, 18(2), 56-60. https://doi.org/10.1007/BF02324500

Hung, Y. Y. ; Daniel, I. M. ; Rowlands, R. E. / Full-field optical strain measurement having postrecording sensitivity and direction selectivity - A coherent optical technique is described which allows for strain determination along any direction and with variable sensitivity using a single photographic recording (shearing-specklegram). In: Experimental Mechanics. 1978 ; Vol. 18, No. 2. pp. 56-60.

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abstract = "An optical method of strain measurement is described which possesses numerous advantages over conventional and holographic interferometry. The method consists of imaging the coherently illuminated object by a lens, and double-exposing a photographic plate in a misfocused image plane before and after deformation of the object. The processed photographic plate or 'specklegram' is subsequently Fourier-filtered to provide fringe patterns representing derivatives of surface displacements with respect to any desired direction and with variable and controllable sensitivity.",

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Hung, YY, Daniel, IM & Rowlands, RE 1978, 'Full-field optical strain measurement having postrecording sensitivity and direction selectivity - A coherent optical technique is described which allows for strain determination along any direction and with variable sensitivity using a single photographic recording (shearing-specklegram)', Experimental Mechanics, vol. 18, no. 2, pp. 56-60. https://doi.org/10.1007/BF02324500

Full-field optical strain measurement having postrecording sensitivity and direction selectivity - A coherent optical technique is described which allows for strain determination along any direction and with variable sensitivity using a single photographic recording (shearing-specklegram). / Hung, Y. Y.; Daniel, I. M.; Rowlands, R. E.
In: Experimental Mechanics, Vol. 18, No. 2, 02.1978, p. 56-60.

Research output: Contribution to journal › Article › peer-review

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Hung YY, Daniel IM, Rowlands RE. Full-field optical strain measurement having postrecording sensitivity and direction selectivity - A coherent optical technique is described which allows for strain determination along any direction and with variable sensitivity using a single photographic recording (shearing-specklegram). Experimental Mechanics. 1978 Feb;18(2):56-60. doi: 10.1007/BF02324500

Full-field optical strain measurement having postrecording sensitivity and direction selectivity - A coherent optical technique is described which allows for strain determination along any direction and with variable sensitivity using a single photographic recording (shearing-specklegram)

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