Abstract

A moving diffuser destroys the spatial coherence of laser light only partially when the integration time is finite; this can be expressed by the signal-to-noise (S/N) ratio in the observed illuminance, due to the residual speckle. The method can be improved by the use of a two-diffuser system of which one diffuser is motionless, the other moving. In this case, the integration time (or the displacement of the diffuser) required to obtain a given S/N ratio can be greatly reduced, allowing the use of a slowly moving diffuser. Moreover, the S/N ratio does not depend on the optical-system parameters, whereas it depends on these parameters when a single diffuser is used.

© 1971 Optical Society of America

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  2. A. W. Lohmann, J. Opt. Soc. Am. 55, 1030 (1965).
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  4. S. Lowenthal, D. Joyeux, and H. Arsenault, Opt. Commun. 2, 184 (1970).
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  11. A. Papoulis, Probability, Random Variables and Stochastic Processes (McGraw–Hill, New York, 1965).
  12. P. Beckmann and A. Spizzichino, The Scattering of Electromagnetic Waves From Rough Surfaces (Pergamon, New York, 1963).

Arsenault, H.

S. Lowenthal and H. Arsenault, J. Opt. Soc. Am. 60, 1478 (1970).

H. Arsenault and S. Lowenthal, Opt. Commun. 1, 451 (1970).

S. Lowenthal, D. Joyeux, and H. Arsenault, Opt. Commun. 2, 184 (1970).

Beckmann, P.

P. Beckmann and A. Spizzichino, The Scattering of Electromagnetic Waves From Rough Surfaces (Pergamon, New York, 1963).

Enloe, L. H.

L. H. Enloe, Bell System Tech. J. 46, 1479 (1967).

Goldfischer, L. I.

L. I. Goldfischer, J. Opt. Soc. Am. 55, 247 (1965).

Goodman, J. W.

J. W. Goodman, J. Opt. Soc. Am. 57, 493 (1967).

Hopkins, H. H.

H. H. Hopkins, Nouv. Rev. Opt. Appl. 1, Suppl. n°2, 3 (1970).

Joyeux, D.

S. Lowenthal, D. Joyeux, and H. Arsenault, Opt. Commun. 2, 184 (1970).

Lohmann, A. W.

A. W. Lohmann, J. Opt. Soc. Am. 55, 1030 (1965).

Lowenthal, S.

S. Lowenthal, D. Joyeux, and H. Arsenault, Opt. Commun. 2, 184 (1970).

S. Lowenthal and H. Arsenault, J. Opt. Soc. Am. 60, 1478 (1970).

H. Arsenault and S. Lowenthal, Opt. Commun. 1, 451 (1970).

Martiensen, W.

W. Martiensen and E. Spiller, Am. J. Phys. 32, 919 (1964).

Papoulis, A.

A. Papoulis, Probability, Random Variables and Stochastic Processes (McGraw–Hill, New York, 1965).

Spiller, E.

W. Martiensen and E. Spiller, Am. J. Phys. 32, 919 (1964).

Spizzichino, A.

P. Beckmann and A. Spizzichino, The Scattering of Electromagnetic Waves From Rough Surfaces (Pergamon, New York, 1963).

van vanLigten, R. F.

R. F. van Ligten, Nouv. Rev. Opt. Appl. 1, Suppl. n°2, 17 (1970).

Other (12)

R. F. van Ligten, Nouv. Rev. Opt. Appl. 1, Suppl. n°2, 17 (1970).

A. W. Lohmann, J. Opt. Soc. Am. 55, 1030 (1965).

H. Arsenault and S. Lowenthal, Opt. Commun. 1, 451 (1970).

S. Lowenthal, D. Joyeux, and H. Arsenault, Opt. Commun. 2, 184 (1970).

L. H. Enloe, Bell System Tech. J. 46, 1479 (1967).

H. H. Hopkins, Nouv. Rev. Opt. Appl. 1, Suppl. n°2, 3 (1970).

S. Lowenthal and H. Arsenault, J. Opt. Soc. Am. 60, 1478 (1970).

L. I. Goldfischer, J. Opt. Soc. Am. 55, 247 (1965).

W. Martiensen and E. Spiller, Am. J. Phys. 32, 919 (1964).

J. W. Goodman, J. Opt. Soc. Am. 57, 493 (1967).

A. Papoulis, Probability, Random Variables and Stochastic Processes (McGraw–Hill, New York, 1965).

P. Beckmann and A. Spizzichino, The Scattering of Electromagnetic Waves From Rough Surfaces (Pergamon, New York, 1963).

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