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
ISSN: 15599450
Editorial
Electromagnetics Academy, 777 CONCORD AVENUE, STE 207, CAMBRIDGE, MA 02138 USA, Estados Unidos America
Tipo de documento: Conference Paper
Volumen: Número:
Páginas: 1543-1546

MÉTRICAS