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Applied Optics

Applied Optics


  • Vol. 18, Iss. 7 — Apr. 1, 1979
  • pp: 1046–1051

Image-shearing camera for direct measurement of surface strains

Y. Y. Hung and C. Y. Liang  »View Author Affiliations

Applied Optics, Vol. 18, Issue 7, pp. 1046-1051 (1979)

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This paper describes a new image-shearing camera which focuses two laterally sheared images at the film plane. With coherent illumination, this camera becomes a shearing interferometer, which directly measures the derivatives of the surface displacements. This strain measuring tool enjoys several advantages over the conventional, holographic, and speckle interferometry, namely, (1) better fringe quality (than speckle interferometry); (2) does not require special vibration isolation; (3) very simple optical setup; (4) direct determination of strains; and (5) extended controllable range of sensitivity.

© 1979 Optical Society of America

Original Manuscript: June 30, 1978
Published: April 1, 1979

Y. Y. Hung and C. Y. Liang, "Image-shearing camera for direct measurement of surface strains," Appl. Opt. 18, 1046-1051 (1979)

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  1. R. K. Erf, Ed., Holographic Nondestructive Testing (Academic, New York, 1974).
  2. R. K. Erf, Ed., Speckle Metrology (Academic, New York, 1978).
  3. Y. Y. Hung, C. E. Taylor, Proc. Soc. Photo-Opt. Instrum. Eng. 41, 169 (1973).
  4. J. A. Leendertz, J. N. Butters, J. Phys. E. 6, 1107 (1973). [CrossRef]
  5. Y. Y. Hung, Opt. Commun. 11, 732 (1974). [CrossRef]
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  8. Y. Y. Hung, I. M. Daniel, R. E. Rowlands, Exp. Mech. 18 (2), 56 (1978). [CrossRef]
  9. F. K. Ligtenberg, Proc. Soc. Exp. Stress Anal. 12 (2), 83 (1954).

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