Listar por autoría "220563e3-e3aa-48e9-a36e-68ac1af33517"

Mostrando ítems 1-20 de 22

    • closedAccess   Analysis of practical fractional vortex beams at far field 

      Peters, Eduardo; Funes, Gustavo; Martínez-León, Lluís; Tajahuerce, Enrique Elsevier ScienceDirect (2022-07-20)
      The subject of calculating the topological charge (TC) or vortex strength of optical vortices has generated divided opinions among scientists. This is due to the fact that proper analytical results are hard to support from ...

    • openAccess   Closed-loop adaptive optics with a single element for wavefront sensing and correction 

      Martinez Cuenca, Raul; Durán, Vicente; Arines, Justo; Ares, Jorge; Jaroszewicz, Z.; Bará, Salvador; Martínez-León, Lluís; Lancis, Jesús Optical Society of America (2011)
      We propose a closed-loop adaptive optical arrangement based on a single spatial light modulator that simultaneously works as a correction unit and as the key element of a wavefront sensor. This is possible by using a liquid ...

    • closedAccess   Compressive holography with phase-structured illumination 

      Martínez-León, Lluís; Climent, Vicent; Lancis, Jesús; Tajahuerce, Enrique; Clemente Pesudo, Pedro Javier; Mori, Yutaka; Nitta, Kouichi IEEE (2015-06)
      We describe several approaches to perform digital holography with single-pixel detection by using phase-structured illumination and compressive sensing. Single-pixel imaging works by sampling the scene ...

    • openAccess   Diffraction-Based Phase Calibration of Spatial Light Modulators With Binary Phase Fresnel Lenses 

      Mendoza-Yero, Omel; Mínguez-Vega, Gladys; Martínez-León, Lluís; Carbonell Leal, Miguel; Fernández Alonso, Mercedes; Doñate-Buendía, Carlos; Pérez Vizcaíno, Jorge; Lancis, Jesús IEEE (2016)
      We propose a simple and robust method to determine the calibration function of phase-only spatial light modulators (SLMs). The proposed method is based on the codification of binary phase Fresnel lenses (BPFLs) onto an ...

    • openAccess   Dynamics of Fractional Vortex Beams at Fraunhofer Diffraction Zone 

      Peters, Eduardo; Funes, Gustavo; Martínez-León, Lluís; Tajahuerce, Enrique MDPI (2022-07-09)
      Fractional vortex beams (FVBs) possess unique topological properties that are manifested in the vortex distribution. However, there are still discrepancies in the value of the vortex strength of FVBs at the far field. In ...

    • openAccess   Femtosecond laser settings for optimal bracket bonding to zirconia 

      García-Sanz, Verónica; Paredes-Gallardo, Vanessa; Bellot-Arcís, Carlos; Martínez-León, Lluís; Torres-Mendieta, Rafael; Montero, Javier; Albadalejo, Alberto Springer Verlag (2018)
      Bonding orthodontic brackets to ceramic materials is a challenging procedure; femtosecond (FS) laser conditioning could provide improved results, but the ideal settings for effective bracket-zirconia bonding have never ...

    • openAccess   Free-Motion Beam Propagation Factor Measurement by Means of a Liquid Crystal Spatial Light Modulator 

      Pérez Vizcaíno, Jorge; Mendoza-Yero, Omel; Martinez Cuenca, Raul; Martínez-León, Lluís; Tajahuerce, Enrique; Lancis, Jesús Institute of Electrical and Electronics Engineers (2012)
      In contrast to the mechanical scanning procedure described in the standard ISO/DIS 11146, the use of electronically tunable focal length lenses has proved its capability for the measurement of the laser beam propagation ...

    • openAccess   Generation of programmable 3D optical vortex structures through devil’s vortex-lens arrays 

      Calabuig Barroso, Alejandro; Sánchez Ruiz, Sergio; Martínez-León, Lluís; Tajahuerce, Enrique; Fernández Alonso, Mercedes; Furlan, Walter; Monsoriu, Juan A.; Pons Martí, Amparo The Optical Society (OSA) (2013-08)
      Different spatial distributions of optical vortices have been generated and characterized by implement- ing arrays of devil’s vortex lenses in a reconfigurable spatial light modulator. A simple design procedure assigns the ...

    • openAccess   High sampling rate single-pixel digital holography system employing a DMD and phase-encoded patterns 

      González, Humberto; Martínez-León, Lluís; Soldevila, Fernando; Araiza Esquivel, María A.; Lancis, Jesús; Tajahuerce, Enrique Optical Society of America (2018)
      A single-pixel digital holography system with phase-encoded illumination using a digital micromirror device (DMD) as a spatial light modulator (SLM) is presented. The enhanced switching rate of DMDs, far exceeding the ...

    • openAccess   High-visibility interference fringes with femtosecond laser radiation 

      Martinez Cuenca, Raul; Martínez-León, Lluís; Lancis, Jesús; Mínguez-Vega, Gladys; Mendoza-Yero, Omel; Tajahuerce, Enrique; Clemente Pesudo, Pedro Javier; Andrés, Pedro Optical Society of America (2009)
      We propose and experimentally demonstrate an interferometer for femtosecond pulses with spectral bandwidth about 100 nm. The scheme is based on a Michelson interferometer with a dispersion compensating module. A diffractive ...

    • openAccess   Phase and amplitude reconstruction in single-pixel transmission microscopy: a comparison of Hadamard, cosine, and noiselet bases 

      Santos-Amador, A.; Araiza Esquivel, María A.; González, Humberto; Rodríguez-Cobos, A.; Tajahuerce, Enrique; Martínez-León, Lluís; Ramírez-Flores, G.; Balderas-Navarro, R. E. Optical Society of America (2021-08-10)
      Hadamard, cosine, and noiselet bases are implemented into a digital holographic microscope based on single-pixel imaging with the capability to retrieve images of complex objects. The object is illuminated with coherent ...

    • openAccess   Phase calibration of spatial light modulators by means of Fresnel images 

      Martínez-León, Lluís; Jaroszewicz, Z.; Kołodziejczyk, A.; Durán, Vicente; Tajahuerce, Enrique; Lancis, Jesús Institute of Physics (2009)
      Reliable application of spatial light modulators (SLMs) as programmable diffractive optical elements requires a thorough calibration. In this paper, we propose a method for calibrating SLMs based on the evaluation of ...

    • openAccess   Poincaré-sphere representation of phase-mostly twisted nematic liquid crystal spatial light modulators 

      Durán, Vicente; Clemente Pesudo, Pedro Javier; Martínez-León, Lluís; Climent, Vicent; Lancis, Jesús Institute of Physics (2009)
      We establish necessary conditions in order to design a phase-only wave front modulation system from a liquid crystal display. These conditions determine the dependence of the polarization state of the light emerging from ...

    • openAccess   Puesta en marcha de plan de actuación en respuesta a prescripciones eur- ace® para la formación y evaluación de competencias transversales en las ingenierías del ámbito industrial de la Universitat Jaume I 

      Alfonso, j. Carlos; Balaguer, Pedro; Beltrán Porcar, Vicente; Bovea, María D; Chiralt, Cristina; Colomer Mendoza, Francisco José; Gozalbo Nebot, Ana; Hernandez, Leonor; Ibáñez Usach, Carmen; Iserte, Sergio; Juliá Bolívar, José Enrique; Llopis, Rodrigo; Martí Forés, Sergio; Martínez-León, Lluís; Martínez-Rodrigo, María D.; Orts Tarí, María José; Piquer, Ana; Recatalá Ballester, Gabriel; Romero Pérez, Julio Ariel; Sánchez García-Vacas, Daniel; Sanchez-Marin, Francisco; Sánchez-Vilches, Enrique; Mondragon, Rosa Publicacions de la Universitat Jaume I (2017-11-09)
      Los grados en ingenierías del ámbito industrial de la Universitat Jaume I (Grado en Ingeniería en Tecnologías Industriales, Ingeniería Mecánica, Ingeniería Eléctrica e Ingeniería Química) han participado recientemente ...

    • openAccess   Single-pixel digital holography with phase-encoded illumination 

      Martínez-León, Lluís; Clemente, Pere; Mori, Yutaka; Climent, Vicent; Lancis, Jesús; Tajahuerce, Enrique Optical Society of America (2017-02-23)
      We demonstrate imaging of complex amplitude objects through digital holography with phase-structured illumination and bucket detection. The object is sampled with a set of micro-structured phase patterns implemented onto ...

    • openAccess   Single-shot color digital holography based on the fractional Talbot effect 

      Araiza Esquivel, María A.; Martínez-León, Lluís; Javidi, Bahram; Andrés, Pedro; Lancis, Jesús; Tajahuerce, Enrique Optical Society of America (2011-02-28)
      We present a method for recording on-axis color digital holograms in a single shot. Our system performs parallel phase-shifting interferometry by using the fractional Talbot effect for every chromatic channel simultaneously. ...

    • openAccess   Single-shot digital holography
by use of the fractional Talbot effect 

      Martínez-León, Lluís; Araiza Esquivel, María A.; Javidi, Bahram; Andrés, Pedro; Climent, Vicent; Lancis, Jesús; Tajahuerce, Enrique Optical Society of America (2009)
      We present a method for recording in-line single-shot digital holograms based on the fractional Talbot effect. In our system, an image sensor records the interference between the light field scattered by the object and a ...

    • openAccess   Spatial-chirp compensation in dynamical holograms reconstructed with ultrafast lasers 

      Martínez-León, Lluís; Clemente Pesudo, Pedro Javier; Tajahuerce, Enrique; Mínguez-Vega, Gladys; Mendoza-Yero, Omel; Fernández Alonso, Mercedes; Lancis, Jesús; Climent, Vicent; Andrés, Pedro American Institute of Physics (2008)
      A computer generated hologram (CGH) reconstructed with a sub-100-fs laser pulse at the focal plane of a conventional refractive lens experiences a large amount of spatial chirp. We report the shaping of a 12 fs laser pulsed ...

    • openAccess   Synthetic aperture single-exposure on-axis digital holography 

      Martínez-León, Lluís; Javidi, Bahram Optical Society of America (2008)
      We present a system for reconstructing single-exposure on-line (SEOL) digital holograms with improved resolution using a synthetic aperture. Several recordings are made in order to compose the synthetic aperture, shifting ...

    • openAccess   Ultrashort pulse fiber delivery with optimized dispersion control by reflection grisms at 800 nm 

      Kalashyan, Meri; Lefort, Claire; Martínez-León, Lluís; Mansuryan, Tigran; Mouradian, Levon; Louradour, Frederic Optical Society of America (2012)
      We experimentally demonstrate a compact and efficient arrangement for fiber delivery of sub-30 fs energetic light pulses at 800 nm. Pulses coming from a broadband Ti:Sapphire oscillator are negatively pre-chirped by a ...