An experiment is described that directly compares the degradations, with the number of scattering mean free paths, of two field correlations that may be used to form gates for imaging techniques in scattered light: the correlation of the scattered wave with an unscattered reference wave and the correlation of two wave-vector components of the scattered wave itself. Results for 20-μm polymer spheres show that the latter correlation is consistently larger well into the multiple-scattering regime (up to 10 mean free paths) for wave-vector separations less than at least 50 mm⁻¹ and that the two correlations tend to merge in this scattering regime for larger wave-vector separations.

© 2000 Optical Society of America

[Optical Society of America ]

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