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Far field properties of spatial coherence beams

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Spatial coherence of optical fields can be considered as beam structured if the size of the coherence patch varies slowly through the propagation of the optical field. As a consequence, the correlation of the optical field will be concentrated in a finite region around the direction of propagation. For properly describing it in the Fraunhofer-Fresnel domain, the marginal cross-spectral density is introduced. The superposition of spatial coherence beams in this domain is also analysed. It produces an interference field and a spatial coherence Moiré.
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Keywords: Cross-spectral density; Moiré pattern; Young's interference; Zernike's formula

Document Type: Original Article

Affiliations: 1: Physics Department, Universidad Nacional de Colombia, A. A. 3840, Medellín, Colombia 2: Physics Department Universidad de Antioquia, A. A. 1226, Medellín, Colombia

Publication date: 2002-06-01

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