Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Alberto Lencina"'
Autor:
Alberto Lencina, Gustavo Romagnoli, Andrea Alonso, Noelia Ramos, Cristian D’Angelo, Lina Lett, Silvia Mestelan
Publikováno v:
International Journal of Recycling of Organic Waste in Agriculture, Vol 11, Iss 3, Pp 319-332 (2022)
Purpose Agronomic and environmental reasons force farmers to know the total P concentration of composted cattle manure. Laser-Induced Breakdown Spectroscopy seems proper to obtain such information. For logistic reasons (carriage, storage, field appli
Externí odkaz:
https://doaj.org/article/a6032c274f11484e94cb81c561b3c179
Autor:
Christian Weber, Alberto Lencina
Publikováno v:
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Universidad Nacional de La Plata
instacron:UNLP
This work presents an adaptable index that is applied to a pair of covers to be discriminated. Its adaptability relies on the procedure to determine the numerical value of the wavelengths or bands involved: the maximization of an operator based on th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa4868bdefb076cdf84f3a5a39d6d84e
https://doi.org/10.1007/s13762-019-02547-5
https://doi.org/10.1007/s13762-019-02547-5
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
In this work, a system for measuring micrometer-displacements based on the characteristics of optical vortices is presented. In the proposal, a binary vortex-producing lens (BVPL) programmed to generate optimized optical vortices is transversally dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df368e04f008b30bca2065175f56c3fa
https://doi.org/10.7149/opa.50.2.49018
https://doi.org/10.7149/opa.50.2.49018
In this work, an analytic expression is derived for the optical field generated by an off-axis Gaussian beam diffracted by a Discrete Vortex-Producing Lens. With this system, a multifocal arrangement of asymmetric optical vortices is obtained whose t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a52df52dbdd1305bcc4fc3c8997e61f
Publikováno v:
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Universidad Nacional de La Plata
instacron:UNLP
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
In this article, a general analytical treatment (any topological charge - any number of discretization levels) for the diffraction of a Gaussian beam through a discretized vortex-producing lens is presented. In the proposal, the field is expressed as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b4ecf4022d74d4c9a075e21aa3687b6
https://ri.conicet.gov.ar/11336/89430
https://ri.conicet.gov.ar/11336/89430
Publikováno v:
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Universidad Nacional de La Plata
instacron:UNLP
This paper presents a method for liquid crystal display characterization. It assumes a liquid crystal display can be considered as a polarization-changing device described by a Jones matrix plus a global phase. The Jones matrix parameters are found b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f48b5c1a5811759656f5d12ea24f9a8
https://www.osapublishing.org/ao/abstract.cfm?uri=ao-56-5-1438
https://www.osapublishing.org/ao/abstract.cfm?uri=ao-56-5-1438
Publikováno v:
Frontiers in Optics 2016.
An in-line system to recover simultaneously topological charge and intensity of an optical-vortex is presented. It is based on adding a Fresnel lens to a vortex-producing lens. The need of an interferometer is eliminated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::364be527fcbe4a73bb3740a132b27687
https://doi.org/10.1364/fio.2016.jw4a.75
https://doi.org/10.1364/fio.2016.jw4a.75
Autor:
Ángel Salazar, Edgar Rueda, Jorge A. Gómez, Néstor Bolognini, Myriam Cristina Tebaldi, Alberto Lencina
Publikováno v:
Optics and Lasers in Engineering. 50:359-365
In this work, we show that it is possible to change the properties of an optical vortex formed in a speckle pattern by the control of an external electric field applied to a sillenite-type photorefractive material in a non-holographic configuration.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c8ca19e82adf3a4405bee6a19eb3d84
https://doi.org/10.1016/j.optlaseng.2011.10.021
https://doi.org/10.1016/j.optlaseng.2011.10.021
Publikováno v:
Optics Communications. 284:2494-2499
The self-image phenomenon by a volume grating is proposed and theoretically analyzed. A theoretical model based on a path integral formulation to describe wave propagation through the grating inhomogeneous medium is applied. A modified version of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a078f726957deb40d7d83aad9ef0938
https://doi.org/10.1016/j.optcom.2011.01.044
https://doi.org/10.1016/j.optcom.2011.01.044
Publikováno v:
Optics Communications. 283:4722-4726
An in situ study of the clustered speckle 3D structure using an optical tweezer setup is presented. Clustered speckles appear when a coherently illuminated diffuser is imaged through a pupil mask with several apertures, properly distributed over a cl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ae74edd2ae0de81f799ec49bd69cf0a
https://doi.org/10.1016/j.optcom.2010.07.033
https://doi.org/10.1016/j.optcom.2010.07.033