Partially-coherent spirally-polarized gradual-edge imaging
| Autor: | Pedro Latorre-Carmona, Rosario Martínez-Herrero, Marcos Pérez-Aviñoa, Artur Carnicer, Ignasi Juvells, Santiago Vallmitjana |
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| Přispěvatelé: | Universitat de Barcelona |
| Rok vydání: | 2019 |
| Předmět: |
Polarització (Llum)
02 engineering and technology Degree of coherence 01 natural sciences Edge detection 010309 optics Optics Polarization 0103 physical sciences Fourier optics Electrical and Electronic Engineering Polarization (Light) Physics Spatial filtering Spatial filter Coherence (Optics) business.industry Mechanical Engineering Paraxial approximation Coherence (Optics 021001 nanoscience & nanotechnology Polarization (waves) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Vortex Òptica de Fourier Coherència (Òptica) 0210 nano-technology business Coherence Coherence (physics) |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de la UB Universidad de Barcelona |
| ISSN: | 0143-8166 |
| DOI: | 10.1016/j.optlaseng.2018.09.003 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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