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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 25, Iss. 22 — Nov. 15, 1986
  • pp: 4155–4161

Vibration measurement using phase-shifting time-average holographic interferometry

Suezou Nakadate  »View Author Affiliations


Applied Optics, Vol. 25, Issue 22, pp. 4155-4161 (1986)
http://dx.doi.org/10.1364/AO.25.004155


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Abstract

Computer image processing techniques for the measurement of vibration amplitude are presented, which utilize phase-shifted time-average holographic interferograms. The calculation of the square root and division with phase-shifted interferograms gives a high contrast fringe pattern which contours the vibration amplitude. The arctangent calculation with phase-shifted fringe patterns also gives the phase distribution proportional to the optical path difference of the measured object before and after vibration. The detection of the phase discontinuity of ±π in the phase image gives exactly the center line of the dark fringe. The distribution of the vibration amplitude can be obtained by the fringe-order determination and its interpolation. The bias deformation of the vibration is obtained by the correction of phase discontinuities of ±2π and ±π in the phase images before and after vibration.

© 1986 Optical Society of America

History
Original Manuscript: March 12, 1986
Published: November 15, 1986

Citation
Suezou Nakadate, "Vibration measurement using phase-shifting time-average holographic interferometry," Appl. Opt. 25, 4155-4161 (1986)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-25-22-4155


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References

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