Výsledky vyhledávání - "Ignasi Juvells"

Partially-coherent spirally-polarized gradual-edge imaging

Autor: Pedro Latorre-Carmona, Rosario Martínez-Herrero, Marcos Pérez-Aviñoa, Artur Carnicer, Ignasi Juvells, Santiago Vallmitjana

Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
instname
Dipòsit Digital de la UB
Universidad de Barcelona

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, th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba6a4af034e86e979ef0d9639e64e08c
https://doi.org/10.1016/j.optlaseng.2018.09.003

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Uncertainty principle for axial power content of highly focused fields

Autor: Ángel S. Sanz, Arturo Carnicer, Rosario Martínez-Herrero, Ignasi Juvells

Publikováno v: E-Prints Complutense. Archivo Institucional de la UCM
instname
Dipòsit Digital de la UB
Universidad de Barcelona
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid

In the analysis of the on-axis intensity for a highly focused optical field it is highly desirable to deal with effective relations aimed at characterizing the field behavior in a rather simple fashion. Here, a novel and adequate measure for the size

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c747cec1822899e7ad28214ef6cc6078
http://arxiv.org/abs/2009.04599

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Axial power content and uncertainty principle for highly focused fields

Autor: Ángel S. Sanz, Rosario Martínez-Herrero, Ignasi Juvells, Arturo Carnicer

Publikováno v: Frontiers in Optics / Laser Science.

A novel measure is proposed to estimate the size of the region where axial power content of highly focused fields mainly concentrates. This measure is established on the basis of a newly defined uncertainty principle.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a98b8d2d8ff816cca7bde73be1d39a8f
https://doi.org/10.1364/fio.2020.jth4a.16

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Effect of linear polarizers on highly focused spirally polarized fields

Autor: David Maluenda, Artur Carnicer, Rosario Martínez-Herrero, Ignasi Juvells

Publikováno v: Recercat. Dipósit de la Recerca de Catalunya
instname
Dipòsit Digital de la UB
Universidad de Barcelona

Linear polarizers are commonly used for projecting the direction of the electric field of a transverse paraxial beam on the direction of the polarizer axis. However, the use of these devices with highly convergent field poses a practical problem beca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10b3310a091b3668a1911e4a2ce0b211
https://doi.org/10.1016/j.optlaseng.2017.06.027

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On how thick diffusers can contribute to the design of optical security systems

Autor: Ignasi Juvells, Artur Carnicer, Kavan Ahmadi

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona

Optical diffusers have been widely investigated from both theoretical and practical points of view.1 In particular, a large number of papers focus on numerical models related to the behavior of light interacting with such devices (see, for instance,2

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a5c35ad179cfd3ca739521f845e6682
https://doi.org/10.1117/12.2527393

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On the behavior of vector light needles using modulation functions with topological charge

Autor: Ignasi Juvells, Artur Carnicer, Rosario Martínez-Herrero, David Maluenda

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
E-Prints Complutense. Archivo Institucional de la UCM
instname

In the present communication, we describe how to produce long light distributions in the focal area of a high numerical aperture optical system using a custom modulation function with spiral charge. This analysis expands our previous developments in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb2d982f392e8451f965d9687ca12d34
https://eprints.ucm.es/61001/

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Considerations on the design of diffractive optical needles

Autor: David Maluenda, Artur Carnicer, Ignasi Juvells, Rosario Martínez-Herrero

Publikováno v: E-Prints Complutense. Archivo Institucional de la UCM
instname
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid

According to intensity consideration along the propagation axis, we derived mathematical conditions for a family of modulating functions able to produce needles of arbitrary length, sub-wavelength width and almost constant irradiance. These functions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4473a3be981f2f574c3b7a2aa40fbc6

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Synthesis of light needles with tunable length and nearly constant irradiance

Autor: David Maluenda, Rosario Martínez-Herrero, Ignasi Juvells, Artur Carnicer

Publikováno v: Dipòsit Digital de la UB
Universidad de Barcelona
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
Scientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
E-Prints Complutense. Archivo Institucional de la UCM
instname
Recercat. Dipósit de la Recerca de Catalunya
Scientific Reports

We introduce a new method for producing optical needles with tunable length and almost constant irradiance based on the evaluation of the on-axis power content of the light distribution at the focal area. According to theoretical considerations, we p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6de487eb7ee28413c75344f62179e0e3
http://hdl.handle.net/2445/124669

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