The use of the Wigner distribution function for defining the concept of quasi-point source, and the application of this concept to the restoration of defocused images
Por:
Berriel-Valdos L.R., Aguilar J.F., Orlando-Guerrero I.J., Ortiz-Sosa R., Mejía-Romero S., Landgrave J.E.A.
Publicada:
1 ene 2012
Resumen:
We introduce the concept of quasi-point source (QPS) by means of the sampled Wigner distribution function (WDF), as applied to the detected image of a small incoherent disc object. A QPS is realized when the WDF of such image is always positive within the extended bandwidth corresponding to this function. To substantiate this concept, we employed a conventional microscope with Köhler illumination. We made use of a QPS to obtain an estimation of the defocused point spread function of an specific optical system. This function was employed next to construct the corresponding Wiener filter, in order to restore defocused images of extended objects.
Filiaciones:
Berriel-Valdos L.R.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Pue., Mexico
Aguilar J.F.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Pue., Mexico
Orlando-Guerrero I.J.:
Univ. de la Cantild
Ortiz-Sosa R.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Pue., Mexico
Mejía-Romero S.:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Pue., Mexico
Landgrave J.E.A.:
Centro de Investigaciones en Óptica, Gto., Mexico
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