Abstract

Stellar specklegrams at different wavelengths are examined. The position of the brightest speckle at one wavelength is shown to coincide nearly with that at a widely separated wavelength. The shift-and-add operation for specklegrams at one wavelength produces a high-resolution stellar image at the other wavelength. We show that the shift-and-add operation at 450 nm results in a high-resolution image at 800 nm by use of observational speckle data from which specklegrams at these wavelengths are taken simultaneously.

© 1995 Optical Society of America

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References

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  1. See, for example,Diffraction-Limited Imaging with Very Large Telescopes, D. M. Alloin, J.-M. Mariotti, eds. (Kluwer, Dordrecht, The Netherlands, 1989), pp. 141–200.
  2. R. H. T. Bates, F. M. Cady, Opt. Commun. 32, 365 (1980).
    [CrossRef]
  3. R. K. Tyson, Principles of Adaptive Optics (Academic, Boston, Mass., 1991), p. 185.
  4. J. C. Christou, Publ. Astron. Soc. Pacific 103, 1040 (1991).
    [CrossRef]
  5. N. Baba, M. Tabata, K. Murata, Opt. Lett. 13, 616 (1988).
    [CrossRef] [PubMed]
  6. S. Kuwamura, N. Baba, N. Miura, E. K. Hege, Astron. J. 105, 665 (1993).
    [CrossRef]
  7. N. Baba, S. Kuwamura, Y. Norimoto, Appl. Opt. 33, 6662 (1994).
    [CrossRef] [PubMed]
  8. E. Ribak, E. K. Hege, J. C. Christou, Proc. Soc. Photo-Opt. Instrum. Eng. 556, 196 (1985).
  9. S. Kuwamura, N. Baba, N. Miura, M. Noguchi, Y. Norimoto, S. Isobe, in Proceedings of ESO Conference on High-Resolution Imaging by Interferometry II, J. M. Beckers, F. Merkle, eds. (European Southern Observatory, Garching, Germany, 1992), p. 461.
  10. F. Roddier, in Progress in Optics, E. Wolf, ed. (North-Holland, Amsterdam, 1981), Vol. 19, p. 295.
    [CrossRef]
  11. D. G. Sandler, S. Stahl, J. R. P. Angel, M. Lloyd-Hart, D. McCarthy, J. Opt. Soc. Am. A 11,925 (1994).
    [CrossRef]
  12. T. S. McKechnie, J. Opt. Soc. Am. A 9, 1937 (1992).
    [CrossRef]

1994 (2)

1993 (1)

S. Kuwamura, N. Baba, N. Miura, E. K. Hege, Astron. J. 105, 665 (1993).
[CrossRef]

1992 (1)

1991 (1)

J. C. Christou, Publ. Astron. Soc. Pacific 103, 1040 (1991).
[CrossRef]

1988 (1)

1985 (1)

E. Ribak, E. K. Hege, J. C. Christou, Proc. Soc. Photo-Opt. Instrum. Eng. 556, 196 (1985).

1980 (1)

R. H. T. Bates, F. M. Cady, Opt. Commun. 32, 365 (1980).
[CrossRef]

Angel, J. R. P.

Baba, N.

N. Baba, S. Kuwamura, Y. Norimoto, Appl. Opt. 33, 6662 (1994).
[CrossRef] [PubMed]

S. Kuwamura, N. Baba, N. Miura, E. K. Hege, Astron. J. 105, 665 (1993).
[CrossRef]

N. Baba, M. Tabata, K. Murata, Opt. Lett. 13, 616 (1988).
[CrossRef] [PubMed]

S. Kuwamura, N. Baba, N. Miura, M. Noguchi, Y. Norimoto, S. Isobe, in Proceedings of ESO Conference on High-Resolution Imaging by Interferometry II, J. M. Beckers, F. Merkle, eds. (European Southern Observatory, Garching, Germany, 1992), p. 461.

Bates, R. H. T.

R. H. T. Bates, F. M. Cady, Opt. Commun. 32, 365 (1980).
[CrossRef]

Cady, F. M.

R. H. T. Bates, F. M. Cady, Opt. Commun. 32, 365 (1980).
[CrossRef]

Christou, J. C.

J. C. Christou, Publ. Astron. Soc. Pacific 103, 1040 (1991).
[CrossRef]

E. Ribak, E. K. Hege, J. C. Christou, Proc. Soc. Photo-Opt. Instrum. Eng. 556, 196 (1985).

Hege, E. K.

S. Kuwamura, N. Baba, N. Miura, E. K. Hege, Astron. J. 105, 665 (1993).
[CrossRef]

E. Ribak, E. K. Hege, J. C. Christou, Proc. Soc. Photo-Opt. Instrum. Eng. 556, 196 (1985).

Isobe, S.

S. Kuwamura, N. Baba, N. Miura, M. Noguchi, Y. Norimoto, S. Isobe, in Proceedings of ESO Conference on High-Resolution Imaging by Interferometry II, J. M. Beckers, F. Merkle, eds. (European Southern Observatory, Garching, Germany, 1992), p. 461.

Kuwamura, S.

N. Baba, S. Kuwamura, Y. Norimoto, Appl. Opt. 33, 6662 (1994).
[CrossRef] [PubMed]

S. Kuwamura, N. Baba, N. Miura, E. K. Hege, Astron. J. 105, 665 (1993).
[CrossRef]

S. Kuwamura, N. Baba, N. Miura, M. Noguchi, Y. Norimoto, S. Isobe, in Proceedings of ESO Conference on High-Resolution Imaging by Interferometry II, J. M. Beckers, F. Merkle, eds. (European Southern Observatory, Garching, Germany, 1992), p. 461.

Lloyd-Hart, M.

McCarthy, D.

McKechnie, T. S.

Miura, N.

S. Kuwamura, N. Baba, N. Miura, E. K. Hege, Astron. J. 105, 665 (1993).
[CrossRef]

S. Kuwamura, N. Baba, N. Miura, M. Noguchi, Y. Norimoto, S. Isobe, in Proceedings of ESO Conference on High-Resolution Imaging by Interferometry II, J. M. Beckers, F. Merkle, eds. (European Southern Observatory, Garching, Germany, 1992), p. 461.

Murata, K.

Noguchi, M.

S. Kuwamura, N. Baba, N. Miura, M. Noguchi, Y. Norimoto, S. Isobe, in Proceedings of ESO Conference on High-Resolution Imaging by Interferometry II, J. M. Beckers, F. Merkle, eds. (European Southern Observatory, Garching, Germany, 1992), p. 461.

Norimoto, Y.

N. Baba, S. Kuwamura, Y. Norimoto, Appl. Opt. 33, 6662 (1994).
[CrossRef] [PubMed]

S. Kuwamura, N. Baba, N. Miura, M. Noguchi, Y. Norimoto, S. Isobe, in Proceedings of ESO Conference on High-Resolution Imaging by Interferometry II, J. M. Beckers, F. Merkle, eds. (European Southern Observatory, Garching, Germany, 1992), p. 461.

Ribak, E.

E. Ribak, E. K. Hege, J. C. Christou, Proc. Soc. Photo-Opt. Instrum. Eng. 556, 196 (1985).

Roddier, F.

F. Roddier, in Progress in Optics, E. Wolf, ed. (North-Holland, Amsterdam, 1981), Vol. 19, p. 295.
[CrossRef]

Sandler, D. G.

Stahl, S.

Tabata, M.

Tyson, R. K.

R. K. Tyson, Principles of Adaptive Optics (Academic, Boston, Mass., 1991), p. 185.

Appl. Opt. (1)

Astron. J. (1)

S. Kuwamura, N. Baba, N. Miura, E. K. Hege, Astron. J. 105, 665 (1993).
[CrossRef]

J. Opt. Soc. Am. A (2)

Opt. Commun. (1)

R. H. T. Bates, F. M. Cady, Opt. Commun. 32, 365 (1980).
[CrossRef]

Opt. Lett. (1)

Proc. Soc. Photo-Opt. Instrum. Eng. (1)

E. Ribak, E. K. Hege, J. C. Christou, Proc. Soc. Photo-Opt. Instrum. Eng. 556, 196 (1985).

Publ. Astron. Soc. Pacific (1)

J. C. Christou, Publ. Astron. Soc. Pacific 103, 1040 (1991).
[CrossRef]

Other (4)

See, for example,Diffraction-Limited Imaging with Very Large Telescopes, D. M. Alloin, J.-M. Mariotti, eds. (Kluwer, Dordrecht, The Netherlands, 1989), pp. 141–200.

R. K. Tyson, Principles of Adaptive Optics (Academic, Boston, Mass., 1991), p. 185.

S. Kuwamura, N. Baba, N. Miura, M. Noguchi, Y. Norimoto, S. Isobe, in Proceedings of ESO Conference on High-Resolution Imaging by Interferometry II, J. M. Beckers, F. Merkle, eds. (European Southern Observatory, Garching, Germany, 1992), p. 461.

F. Roddier, in Progress in Optics, E. Wolf, ed. (North-Holland, Amsterdam, 1981), Vol. 19, p. 295.
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Instrument for observing specklegrams simultaneously at two wavelengths. M, mirror.

Fig. 2
Fig. 2

Simultaneously recorded specklegrams of Capella at λ1 = 450 nm and Δλ1 = 10 nm (bottom) and λ2 = 800 nm and Δλ2 = 9 nm (top).

Fig. 3
Fig. 3

Plot of frequency distribution of the separation vectors that join the location of the brightest speckle at λ1 = 450 nm with that at λ2 = 800 nm.

Fig. 4
Fig. 4

SAA-reconstructed image at one wavelength and the accompanying reconstructed image at the other wavelength. The size of one mesh in the plot is 0.19″×0.19″.(a) SAA at λ1 = 450 nm, (b) SAA at λ2 = 800 nm.

Equations (2)

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ψ h j ( x , y ) = ψ h j + δ h j ( x , y ) exp [ i φ j ( x , y ) ] ,
φ j ( x , y ) = 2 π λ h j h j + δ h j n ( x , y , z ; λ ) d z

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