2026-04-14T06:15:19Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1246792025-11-19T11:00:29Zcom_2072_1057col_2072_478821col_2072_478917

urn:hdl:2445/124679 Partially-coherent spirally-polarized gradual-edge imaging Pérez Aviñoa, Marcos Martínez-Herrero, Rosario Vallmitjana i Rico, Santiago Latorre-Carmona, Pedro Juvells Prades, Ignacio Carnicer González, Arturo Òptica de Fourier Coherència (Òptica) Polarització (Llum) Fourier optics Coherence (Optics) Polarization (Light) In this work we develop a partially-coherent spirally-polarized imaging system for generating gradual edge detection images. A rotating diffuser is used for producing illumination sources with tunable degree of coherence. Using a 4f configuration, the frequency content of the image is modified by means of a vortex half-wave retarder as a spatial filter. Accordingly, we analytically describe a spirally-polarized imaging system illuminated with a Gauss-Schell source using paraxial coherence-polarization theory. Numerical simulations and experimental results demonstrate the validity of our approach. We use a referenceless spatial content descriptor to assess the quality of the recorded images as a function of the coherence state of the source. 2018-09-19T12:11:04Z 2020-09-13T05:10:21Z 2018-09-13 2018-09-19T12:11:04Z info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Versió postprint del document publicat a: https://doi.org/10.1016/j.optlaseng.2018.09.003 Optics and Lasers in Engineering, 2018, vol. 112, p. 53-58 https://doi.org/10.1016/j.optlaseng.2018.09.003 cc-by-nc-nd (c) Elsevier, 2018 http://creativecommons.org/licenses/by-nc-nd/3.0/es info:eu-repo/semantics/openAccess Elsevier Articles publicats en revistes (Física Aplicada)