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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 2, Iss. 5 — May. 1, 1985
  • pp: 657–666

Statistical analysis of one-beam subjective laser-speckle interferometry

D. W. Li, J. B. Chen, and F. P. Chiang  »View Author Affiliations

JOSA A, Vol. 2, Issue 5, pp. 657-666 (1985)

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The use of laser speckle for displacement and deformation measurement has found wide applications in mechanics and metrology. Traditionally, a deterministic approach has been adopted to analyze the process. In this paper a statistical approach is utilized, resulting in a better understanding of the limitations and potentials of one-beam subjective laser-speckle interferometry (or speckle photography). We find that the amplitude modulation of the information-carrying cosine fringes is controlled by three factors: a decorrelation factor γ, a displacement factor Ω, and a displacement-gradient factor ψ. We introduce the concept of an ambiguity factor that sets a critical value for the product γΩψ. We then propose a criterion for fringe discernibility from which the upper limit of measurement is established.

© 1985 Optical Society of America

Original Manuscript: August 27, 1984
Manuscript Accepted: December 19, 1984
Published: May 1, 1985

D. W. Li, J. B. Chen, and F. P. Chiang, "Statistical analysis of one-beam subjective laser-speckle interferometry," J. Opt. Soc. Am. A 2, 657-666 (1985)

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