Abstract

In order to exploit the full potential offered by optical correlation processing in the analysis of transparencies obtained by particle image velocimetry one needs to advance the transparency and to track the position of correlation peaks at great speed. In the following, this procedure is discussed with reference to an optical analysis system based on a high-speed ferroelectric optically addressed spatial light modulator. We present a system that uses scanning optics both to scan through the input transparency and to locate the correlation peaks in the resulting optical output distributions as a practical solution to the problem. The feasibility of this approach is demonstrated at a processing speed of ~ 500 autocorrelations/s when a one-dimensional acousto-optic output scanning device is used.

© 1993 Optical Society of America

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References

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  1. C. J. D. Pickering, N. A. Halliwell, “Particle image velocimetry: a new field measurement technique,” Optical Measurements in Fluid Mechanics, Inst. Phys. Conf. Ser. 77, 147–152 (1985).
  2. J. M. Huntley, “Speckle photography fringe analysis: assessment of current algorithms,” Appl. Opt. 28, 4316–4322 (1989).
    [CrossRef] [PubMed]
  3. J. M. Coupland, N. A. Halliwell, “Particle image velocimetry: rapid transparency analysis using optical correlation,” Appl. Opt. 27, 1919–1921 (1988).
    [CrossRef] [PubMed]
  4. R. C. Chittick, W. A. Crossland, J. R. Broddehurst, P. Cambon, M. Killinger, J.-L. de Bougrenet de la Tocnoye, “Development and applications of a truly bistable optically addressed spatial light modulator,” in Spatial Light Modulators and Their Applications, Vol. 14 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), pp. 136–140.

1989 (1)

1988 (1)

1985 (1)

C. J. D. Pickering, N. A. Halliwell, “Particle image velocimetry: a new field measurement technique,” Optical Measurements in Fluid Mechanics, Inst. Phys. Conf. Ser. 77, 147–152 (1985).

Broddehurst, J. R.

R. C. Chittick, W. A. Crossland, J. R. Broddehurst, P. Cambon, M. Killinger, J.-L. de Bougrenet de la Tocnoye, “Development and applications of a truly bistable optically addressed spatial light modulator,” in Spatial Light Modulators and Their Applications, Vol. 14 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), pp. 136–140.

Cambon, P.

R. C. Chittick, W. A. Crossland, J. R. Broddehurst, P. Cambon, M. Killinger, J.-L. de Bougrenet de la Tocnoye, “Development and applications of a truly bistable optically addressed spatial light modulator,” in Spatial Light Modulators and Their Applications, Vol. 14 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), pp. 136–140.

Chittick, R. C.

R. C. Chittick, W. A. Crossland, J. R. Broddehurst, P. Cambon, M. Killinger, J.-L. de Bougrenet de la Tocnoye, “Development and applications of a truly bistable optically addressed spatial light modulator,” in Spatial Light Modulators and Their Applications, Vol. 14 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), pp. 136–140.

Coupland, J. M.

Crossland, W. A.

R. C. Chittick, W. A. Crossland, J. R. Broddehurst, P. Cambon, M. Killinger, J.-L. de Bougrenet de la Tocnoye, “Development and applications of a truly bistable optically addressed spatial light modulator,” in Spatial Light Modulators and Their Applications, Vol. 14 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), pp. 136–140.

de Bougrenet de la Tocnoye, J.-L.

R. C. Chittick, W. A. Crossland, J. R. Broddehurst, P. Cambon, M. Killinger, J.-L. de Bougrenet de la Tocnoye, “Development and applications of a truly bistable optically addressed spatial light modulator,” in Spatial Light Modulators and Their Applications, Vol. 14 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), pp. 136–140.

Halliwell, N. A.

J. M. Coupland, N. A. Halliwell, “Particle image velocimetry: rapid transparency analysis using optical correlation,” Appl. Opt. 27, 1919–1921 (1988).
[CrossRef] [PubMed]

C. J. D. Pickering, N. A. Halliwell, “Particle image velocimetry: a new field measurement technique,” Optical Measurements in Fluid Mechanics, Inst. Phys. Conf. Ser. 77, 147–152 (1985).

Huntley, J. M.

Killinger, M.

R. C. Chittick, W. A. Crossland, J. R. Broddehurst, P. Cambon, M. Killinger, J.-L. de Bougrenet de la Tocnoye, “Development and applications of a truly bistable optically addressed spatial light modulator,” in Spatial Light Modulators and Their Applications, Vol. 14 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), pp. 136–140.

Pickering, C. J. D.

C. J. D. Pickering, N. A. Halliwell, “Particle image velocimetry: a new field measurement technique,” Optical Measurements in Fluid Mechanics, Inst. Phys. Conf. Ser. 77, 147–152 (1985).

Appl. Opt. (2)

Optical Measurements in Fluid Mechanics (1)

C. J. D. Pickering, N. A. Halliwell, “Particle image velocimetry: a new field measurement technique,” Optical Measurements in Fluid Mechanics, Inst. Phys. Conf. Ser. 77, 147–152 (1985).

Other (1)

R. C. Chittick, W. A. Crossland, J. R. Broddehurst, P. Cambon, M. Killinger, J.-L. de Bougrenet de la Tocnoye, “Development and applications of a truly bistable optically addressed spatial light modulator,” in Spatial Light Modulators and Their Applications, Vol. 14 of 1990 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1990), pp. 136–140.

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Figures (3)

Fig. 1
Fig. 1

Setup of optical autocorrelation system based on optical spatial light modulator: PBS, polarizing beam splitter; M1–M4, mirrors; AP, aperture; P1, P2, polarizers; BS, beam splitter.

Fig. 2
Fig. 2

Data acquisition by randomly scanning the area around the previous autocorrelation spot.

Fig. 3
Fig. 3

Autocorrelation output detected by a single photodiode with a scanning read beam.

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