ListarGrupo de Nanofotonica por tema "UTN"
Mostrando ítems 1-20 de 35
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Application of a long-rangesweptsource optical coherence tomography-based scheme for dimensional characterization of multilayer transparent objects
(2017-08-18)This work presents the use of a recently develop edinter ferometric system based on the swept source optical coherence tomography (SS-OCT) technique, which allows the characterization of transparent and semitransparent ... -
Cabezal óptico compacto aplicado a la medición de vibraciones sin contacto
(Cuarto Congreso Argentino de Ingeniería Mecánica – CAIM 2014, 2014)En este trabajo presentamos un cabezal óptico diseñado para medición de vibraciones basado en la señal de error de foco (SEF), la misma utilizada para leer datos en un cabezal láser de DVD o CD. El sistema fue diseñado ... -
Characterization of reference standards for dirt by Laser Ablation Induced Photoacoustics (LAIP)
(2009-07-23)Measurements of surface cleanliness and dirt characterization are important problems in a wide range of processes in industry and production. Standard methods are in most cases cumber some laboratory procedures that must ... -
Determination of Nanoscale Mechanical Properties of Polymers via Plasmonic Nanoantennas
(2020-06-02)Nanotechnology and the consequent emergence of miniaturized devices are driving the need to improve our understanding of the mechanical properties of a myriad of materials. Here we focus on amorphous polymeric materials ... -
Diseño y construcción de un módulo de microscopía de barrido por sondeo local y de un sistema de nanoposicionamiento de alta precisión para un microscopio multianálisis
(2014)Este trabajo presenta la técncia de interferometrá de baja coherencia orientada a la obtención de topografiá de superficies y tomografía de materiales. Se decribe la idea general, se presentan distintos esquemas experimentales ... -
Dual system increases the resolution of a low coherence interferometer system through a signal detector astigmatic focus
(2015-10-29)La interferometría de baja coherencia en el espacio de Fourier (OCT-FD) es una técnica que permite medir distancia con valores típicos de rango dinámico en el orden de 3 mm y resolución por debajo de los 10 µm. En este ... -
Dual system increases the resolution of a low coherence interferometer system through a signal detector astigmatic focus
(2015-10-29)The low coherence interferometry in Fourier space (FD-OCT) is a technique to measure distance with typical values of dynamic range in the order of 3 mm and resolution below 10 microns. In this paper we propose to combine ... -
Dynamic Detection of Thicknesses in Polymer Deformation Based on the Optical Coherence Interferometry Technique
(2015-07-31)We describe the implementation of the optical coherence interferometry (OCT) technique in the dynamic measurement of the deformation of polymers. The experimental set-up of the interferometer system and the signal processing ... -
Extending low-coherence interferometry dynamic range using heterodyne detection
(2020-08)Low-coherence interferometry (LCI) technique is generating considerable interest in industrial applications where there is a need for larger measurements with high resolution. Conventional Fourier domain systems reach a ... -
Extensión del rango dinámico de la tomografía óptica coherente sensible a la fase
(RAFA - Santa Fé, 2019-10)La tomografía óptica coherente sensible a la fase (PhS-OCT), también conocida como microscopía de fase (SDPM), es una técnica que se basa en la medición de la fase en la señal de interferencia obtenida por tomografía óptica ... -
Fabricación y Caracterización de Sustratos Plasmónicos Basados en Nanobastones de Oro
(2015)Se fabricaron sustratos plasmónicos mediante el recubrimiento controlado de superficies de vidrio y películas delgadas de oro con nanobastones de oro. Estos sustratos nanoestructurados poseen resonancias ópticas en el ... -
Fabry Perot detector for low coherence interferometry
(2023-06)Se proponen dos diseños teóricos de detectores de intensidad para distintas longitudes de onda basados en cavidades Fabry Perot para ser aplicados en la técnica de interferometría de baja coherencia en el dominio de las ... -
Fast scanner with position monitor forlargeopticaldelays
(2001-11-01)Wepresent a new fastscansystemthatemploys a stepper motor used in a single steposcillatingmode and a position monitor devicebasedon a diode laser. Thesetupusedgeneratesdelays as large as 105 ps at 10 Hz, with 100% dutycycle. ... -
Harmonic demodulation and minimum enhancement factors in field-enhanced near-field optical microscopy
(2015-01)Field enhanced scanning optical microscopy (FESOM) relies on the design and fabrication of plasmonic probes which had to provide optical and chemical contrast at the nanoscale. In order to do so, the scattering containing ... -
High resolution imaging using nanoparticle based probes
(2018)New plasmonic probes, based on silica microspheres decorated with metal nanoparticles (Figure 1), are built and used to confine and enhance the electric field in their interaction with the sample, giving ultra-high optical ... -
Improved spectral resolution in time-varying interferometry
(2018-11)In this work, we present a procedure that allows increasing the resolution of dynamic length measurements made by spectral interferometry. The proposed scheme leads to obtaining a compact photonic instrument with the ability ... -
Inclination shift signal: thickness or index measurement in transparent media by transmission of generally astigmatic Gaussian beams
(2021-04)The focus error signal is a widespread optical technique that harnesses the shape of a simply astigmatic Gaussian beam to produce an output signal with a well-defined linear range used for many different applications. ... -
Interferometric system based on swept source-optical coherence tomography scheme applied to the measurement of distances of industrial interest
(2015-12-11)We used an interferometric technique based on typical optical coherence tomography (OCT) schemes for measuring distances of industrial interest. The system employed as a light source a tunable erbium-doped fiber laser of ... -
Kinetic and plasmonic properties of gold nanorods adsorbed on glass substrates
(2019-09-19)Monodisperse gold nanorods with different sizes were synthesized and adsorbed on chemically modified glass substrates. Influence of surfactant molar concentration on nanorod adsorption was studied and the optimum range was ... -
Limitations due to the detector in the low coherence interferometry
(2008-02-15)Se describirá como se generan las señales de interferometria de baja coherencia en el espacio de Fourier, se determinara las características que determinan el rango dinámico del sistema y las señales asociadas al sistema ...