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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 31, Iss. 11 — Apr. 10, 1992
  • pp: 1863–1870

Contrast of the vibration fringes in time-averaged electronic speckle-pattern interferometry: effect of speckle averaging

C. Joenathan and B. M. Khorana  »View Author Affiliations


Applied Optics, Vol. 31, Issue 11, pp. 1863-1870 (1992)
http://dx.doi.org/10.1364/AO.31.001863


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Abstract

This paper presents a detailed investigation of the effect of speckle averaging in electronic speckle-pattern interferometric fringes. The theory states that the constrast of the resultant smoothed fringes increases as the number of frames is increased. It is shown that the contrast of the fringes is optimized with a limited number of superpositions, and further addition results in the reduction of speckle noise with the contrast remaining almost the same. The contrast of the fringes obtained with π and π/2 phase-stepping methods with speckle averaging is also discussed. Both theoretical and experimental results are presented in this paper.

© 1992 Optical Society of America

History
Original Manuscript: July 11, 1991
Published: April 10, 1992

Citation
C. Joenathan and B. M. Khorana, "Contrast of the vibration fringes in time-averaged electronic speckle-pattern interferometry: effect of speckle averaging," Appl. Opt. 31, 1863-1870 (1992)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-31-11-1863


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References

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