title: Surface characterization from doubly scattered light.
abstract: When a translucent diffuser is illuminated by a speckle pattern, a new speckle pattern is produced. We show that the decorrelation of this intensity pattern by displacement of the diffusing surface is related to the standard deviation of the slope's distribution when the illuminating speckle grain is chosen appropriately small. The experimental results are compared with those obtained by measuring the angular distribution of the mean scattered intensity, and they show good agreement with each other.
authors.affiliation: Laboratorio de Aplicaciones Opticas, Departamento de Física, Facultad de Ingeniería, Universidad de Buenos Aires, Paseo Colón 850, C1063ACU Buenos Aires, Argentina. fperez@fi.uba.ar
authors.forename: Fernando
authors.initials: F
authors.lastname: Perez-Quintián
authors.forename: María A
authors.initials: MA
authors.lastname: Rebollo