Abstract

A real-time coherent optical correlator is mounted inside a 15- × 23- × 38-cm enclosure and features laser diode light sources and a liquid crystal incoherent-to-coherent image converter. Each of four reference filters is illuminated by a separate laser diode, real-time operation is achieved by the image converter, and a zoom lens forming the incoherent image allows a scale search. The correlator can be mounted on a tripod and performs correlations indoors or outdoors.

© 1983 Optical Society of America

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References

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  1. A. VanderLugt, IEEE Trans. Inf. Theory IT-10,139 (1964).
  2. A. VanderLugt, Proc. IEEE 62, 1300 (1974).
    [CrossRef]
  3. R. E. Williams, M. Morales, K. von Bieren, Appl. Opt. 14, 2944 (1975).
    [CrossRef] [PubMed]
  4. B. W. Vatz, Ed., Effective Utilization of Optics in Radar Systems, Soc. Photo-Opt. Instrum. Eng. Proc. 128 (1977).
  5. A. D. Gara, Appl. Opt. 16, 149 (1977).
    [CrossRef] [PubMed]
  6. A. D. Gara, Appl. Opt. 18, 172 (1979).
    [CrossRef] [PubMed]
  7. B. D. Gunther, C. R. Christensen, J. Upatnieks, IEEE J. Quantum Electron. QE-15, 1348 (1979).
    [CrossRef]
  8. J. G. Duthie, J. Upatnieks, C. R. Christensen, R. D. McKenzie, International Opt. Comp. Conf., Proc. Soc. Photo-Opt. Instrum. Eng. 231, 281 (1980).
  9. F. Caimi, D. Casasent, M. Shen, B. Feng, Appl. Opt. 19, 2653 (1980).
    [CrossRef] [PubMed]
  10. W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).
  11. B. W. Joseph, A. D. Gara, Appl. Opt. 17, 1987 (1978).
    [CrossRef]

1980 (2)

J. G. Duthie, J. Upatnieks, C. R. Christensen, R. D. McKenzie, International Opt. Comp. Conf., Proc. Soc. Photo-Opt. Instrum. Eng. 231, 281 (1980).

F. Caimi, D. Casasent, M. Shen, B. Feng, Appl. Opt. 19, 2653 (1980).
[CrossRef] [PubMed]

1979 (2)

A. D. Gara, Appl. Opt. 18, 172 (1979).
[CrossRef] [PubMed]

B. D. Gunther, C. R. Christensen, J. Upatnieks, IEEE J. Quantum Electron. QE-15, 1348 (1979).
[CrossRef]

1978 (2)

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

B. W. Joseph, A. D. Gara, Appl. Opt. 17, 1987 (1978).
[CrossRef]

1977 (2)

B. W. Vatz, Ed., Effective Utilization of Optics in Radar Systems, Soc. Photo-Opt. Instrum. Eng. Proc. 128 (1977).

A. D. Gara, Appl. Opt. 16, 149 (1977).
[CrossRef] [PubMed]

1975 (1)

1974 (1)

A. VanderLugt, Proc. IEEE 62, 1300 (1974).
[CrossRef]

1964 (1)

A. VanderLugt, IEEE Trans. Inf. Theory IT-10,139 (1964).

Bleha, W. P.

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Brown, H. B.

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Caimi, F.

Casasent, D.

Cassasent, D.

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Christensen, C. R.

J. G. Duthie, J. Upatnieks, C. R. Christensen, R. D. McKenzie, International Opt. Comp. Conf., Proc. Soc. Photo-Opt. Instrum. Eng. 231, 281 (1980).

B. D. Gunther, C. R. Christensen, J. Upatnieks, IEEE J. Quantum Electron. QE-15, 1348 (1979).
[CrossRef]

Duthie, J. G.

J. G. Duthie, J. Upatnieks, C. R. Christensen, R. D. McKenzie, International Opt. Comp. Conf., Proc. Soc. Photo-Opt. Instrum. Eng. 231, 281 (1980).

Feng, B.

Gara, A. D.

Grinberg, J.

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Gunther, B. D.

B. D. Gunther, C. R. Christensen, J. Upatnieks, IEEE J. Quantum Electron. QE-15, 1348 (1979).
[CrossRef]

Joseph, B. W.

Lipton, L. T.

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Markevitch, B. V.

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

McKenzie, R. D.

J. G. Duthie, J. Upatnieks, C. R. Christensen, R. D. McKenzie, International Opt. Comp. Conf., Proc. Soc. Photo-Opt. Instrum. Eng. 231, 281 (1980).

Morales, M.

Reif, P. G.

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Shen, M.

Upatnieks, J.

J. G. Duthie, J. Upatnieks, C. R. Christensen, R. D. McKenzie, International Opt. Comp. Conf., Proc. Soc. Photo-Opt. Instrum. Eng. 231, 281 (1980).

B. D. Gunther, C. R. Christensen, J. Upatnieks, IEEE J. Quantum Electron. QE-15, 1348 (1979).
[CrossRef]

VanderLugt, A.

A. VanderLugt, Proc. IEEE 62, 1300 (1974).
[CrossRef]

A. VanderLugt, IEEE Trans. Inf. Theory IT-10,139 (1964).

von Bieren, K.

Wiener-Aunpar, E.

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Williams, R. E.

Appl. Opt. (5)

Effective Utilization of Optics in Radar Systems (1)

B. W. Vatz, Ed., Effective Utilization of Optics in Radar Systems, Soc. Photo-Opt. Instrum. Eng. Proc. 128 (1977).

IEEE J. Quantum Electron. (1)

B. D. Gunther, C. R. Christensen, J. Upatnieks, IEEE J. Quantum Electron. QE-15, 1348 (1979).
[CrossRef]

IEEE Trans. Inf. Theory (1)

A. VanderLugt, IEEE Trans. Inf. Theory IT-10,139 (1964).

International Opt. Comp. Conf. (1)

J. G. Duthie, J. Upatnieks, C. R. Christensen, R. D. McKenzie, International Opt. Comp. Conf., Proc. Soc. Photo-Opt. Instrum. Eng. 231, 281 (1980).

Opt. Eng. (1)

W. P. Bleha, L. T. Lipton, E. Wiener-Aunpar, J. Grinberg, P. G. Reif, D. Cassasent, H. B. Brown, B. V. Markevitch, Opt. Eng. 17, 371 (1978).

Proc. IEEE (1)

A. VanderLugt, Proc. IEEE 62, 1300 (1974).
[CrossRef]

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Figures (11)

Fig. 1
Fig. 1

Typical coherent optical correlator.

Fig. 2
Fig. 2

Compact coherent real-time optical correlator.

Fig. 3
Fig. 3

Internal view of the correlator.

Fig. 4
Fig. 4

Laser diode subassembly.

Fig. 5
Fig. 5

Exterior view of the correlator and the electronics package.

Fig. 6
Fig. 6

Schematic of the filter maker.

Fig. 7
Fig. 7

Filter maker system.

Fig. 8
Fig. 8

Correlation peak with triangular test pattern: (a) photograph; (b) 3-D plot.

Fig. 9
Fig. 9

Correlation experiments: (a) test pattern; (b) four correlation spots from four laser diodes; (c) correlation spots from one laser diode with the test pattern in four different positions.

Fig. 10
Fig. 10

Images used in correlation experiments: (a) portion of the image recorded in the filter; (b) whole image.

Fig. 11
Fig. 11

Correlation spots obtained with (a) image of Fig. 10(a), (b) image of Fig. 10(b), (c) actual scene.

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