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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 25 — Sep. 1, 2000
  • pp: 4582–4588

Enhancing the Sensitivity to Small Phase Changes in Double-Exposure Stroboscopic Television Holography

Ángel F. Doval, Cristina Trillo, Daniel Cernadas, Benito V. Dorrío, Carlos López, José L. Fernández, and Mariano Pérez-Amor  »View Author Affiliations


Applied Optics, Vol. 39, Issue 25, pp. 4582-4588 (2000)
http://dx.doi.org/10.1364/AO.39.004582


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Abstract

We present a new technique for enhancing the sensitivity of double-exposure stroboscopic television holography (TVH) to detect and measure vibrations of small amplitude. The technique is based in the modulation of the phase of the reference beam in synchronism with the vibration of the measurand and derives from a former technique that we originally contrived for phase evaluation. We propose two variants, characterized by the demodulation process used to generate the secondary correlograms, with different behaviors in terms of the sensitivity to the sign of the measurand and of the ease in detecting the presence and shape of the vibration. We have implemented this new technique in an electronic speckle-pattern interferometer and compared its performance with standard TVH techniques; vibrations with amplitudes as small as 8 nm have been observed with this setup.

© 2000 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis

Citation
Ángel F. Doval, Cristina Trillo, Daniel Cernadas, Benito V. Dorrío, Carlos López, José L. Fernández, and Mariano Pérez-Amor, "Enhancing the Sensitivity to Small Phase Changes in Double-Exposure Stroboscopic Television Holography," Appl. Opt. 39, 4582-4588 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-25-4582


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References

  1. O. J. Løkberg and K. Høgmoen, “Use of a modulated reference wave in electronic speckle pattern interferometry,” J. Phys. E 9, 847–851 (1976).
  2. O. J. Løkberg and K. Høgmoen, “Holographic methods madeuseful by phase modulated ESPI,” in First European Conference on Optics Applied to Metrology, M. H. Grosmann, ed., Proc. SPIE 136, 222–225 (1978).
  3. A. F. Doval, J. L. Fernández, M. Pérez-Amor, J. D. Valera, and J. D. C. Jones, “Phase-stepped additive stroboscopic fiber optic TV holography for vibration analysis,” in Optical Measurements and Sensors for the Process Industries, C. Gorecki and R. W. Preater, eds., Proc. SPIE 2248, 229–240 (1994).
  4. A. F. Doval, J. L. Fernández, M. Pérez-Amor, J. D. R. Valera, and J. D. C. Jones, “Contrast enhanced and phase controlled stroboscopic additive fiber optic TV holography for whole field out-of-plane vibration analysis,” Opt. Lasers Eng. 25, 323–342 (1996).
  5. A. F. Doval, “A systematic approach to TV holography,” Meas. Sci. Technol. 11, R1–R36 (2000).
  6. R. Jones and C. Wykes, “General parameters for the design and optimization of electronic speckle pattern interferometers,” Opt. Acta 28, 949–972 (1981).

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