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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 66, Iss. 11 — Nov. 1, 1976
  • pp: 1282–1290

Speckle noise in displays

Nicholas George, C. R. Christensen, J. S. Bennett, and B. D. Guenther  »View Author Affiliations

JOSA, Vol. 66, Issue 11, pp. 1282-1290 (1976)

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A theory is presented which relates the minimum detectable contrast level for an object in the presence of noise to the statistics of the speckle. Consideration is given to smoothing of the noise by multiple looks and by area. Measurements of the minimum detectable contrast are made for two types of speckle noise. First, a coherent, plane wave is added to an ideal diffuse wave and the threshold of detection is established as a function of the beam ratio. Secondly, these results are compared to the technique of speckle smoothing using an N-fold intensity superposition of fully developed speckle pattens. Good agreement of experiments with theory is observed.

© 1976 Optical Society of America

Nicholas George, C. R. Christensen, J. S. Bennett, and B. D. Guenther, "Speckle noise in displays," J. Opt. Soc. Am. 66, 1282-1290 (1976)

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  1. T. S. McKechnie, "Speckle Reduction," in Laser Speckle, edited by J. C. Dainty (Springer-Verlag, Berlin, 1975), p. 123.
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  12. POTA is composed of 1-phenyl-3-pyrazolidone, 1.5 g; sodium sulfite, 30 g; and cold water (25 °C) to make 1000 cm3.
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