3D Field Correlation of Speckles Generated by Pupils with Multiple Apertures

A. LENCINA; R. GUZMÁN; M. TEBALDI; N. BOLOGNINI

Lima

Congreso; VII REUNIÓN IBEROAMERICANA DE ÓPTICA - X ENCUENTRO LATINOAMERICANO DE ÓPTICA, LÁSERES Y SUS APLICACIONES; 2010

Speckle fields appear when a coherent light source and a roughness surface are involved in an experiment. These structures were utilized in metrology, dynamical holography, and encryption, among other areas. The properties of objective and subjective speckles generated by pupils with only one aperture have been widely studied. Recently, the regular clustered speckle was introduced by using pupils with several apertures arranged along different geometrical paths. Its transversal intensity correlations were depicted and determine the regular cluster formation. In this work, the fully 3D field correlations are theoretically worked out. To do this, non restrictive assumptions about the speckle and pupil properties are considered. Attention is focused in the longitudinal correlation whit identical apertures uniformly distributed on a circumference. Experimental and theoretical results are analyzed.