FAR-FIELD ANGULAR DISTRIBUTION OF THE MEAN SCATTERED INTENSITY FROM STRONG DIFFUSERS BY MEANS OF A NEAR-FIELD INTENSITY PATTERN

NATALIA ÁLVAREZ; PEREZ QUINTIAN, FERNANDO

APPLIED OPTICS

OPTICAL SOC AMER

Año: 2010 vol. 49 p. 1335 - 1340

0003-6935

The speckle grain close to a diffuser medium carries information about the angles at which light is scattered. In this work we propose the extension of a technique that allows obtaining the angular distribution of the scattered intensity in the far-field from the near-field speckle pattern produced by strong diffusers (whose roughness is greater than the illuminating wavelength). To illustrate this technique we applied it to the light scattered from ground glass diffusers. The experimental results are compared to those obtained by measuring directly the angular distribution of the mean scattered intensity in the far field showing good agreement with each other. The advantages over the classical far field methods are outlined.