Exploració per tema "Optics"

Ara es mostren els items 21-40 de 101

    • Diffuse optics with time-pulsed, gated point and ring sources 

      Mateos Estévez, Nicolás (Universitat Politècnica de Catalunya, 2015-06-29)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • Difracción: el tamaño importa 

      Marzoa Domínguez, Antonio (2021-03-01)
      Article
      Accés obert
      ¿Nunca te has sorprendido en la autopista por la forma de los haces de luz de los faros de carretera? ¿O bien porque al tomar fotografías de paisajes dónde aparece el Sol, aparecen haces de luz como hilillos que emergen ...

    • El director del CUV, Joan Gispets, conversa amb Jaume Pauné 

      Gispets Parcerisas, Joan (2010-07-01)
      Audiovisual
      Accés obert

    • El director del CUV, Joan Gispets, conversa con Jaume Pauné 

      Gispets Parcerisas, Joan; Pauné Fabré, Jaime (2010-07-01)
      Audiovisual
      Accés obert

    • Disseny d'un canal de despolarització a 532 nm per al lidar d'EARLINET de la UPC 

      Vidal Calvo, Eric (Universitat Politècnica de Catalunya, 2013-03-14)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] Design of a depolarization channel at the wavelength of 532 nm for the UPC EARLINET lidar

    • Disseny de lents progressives 

      Casanellas Peñalver, Glòria (Universitat Politècnica de Catalunya, 2014-02)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      Presbyopia starts to show up at the age of 40. The lens of the eye loses its flexibility to the point where we can no longer accommodate clearly in near vision. Progression-addition lenses correct the lack of accommodation ...

    • Dynamic versus Anderson wave-packet localization 

      Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2015-06-18)
      Article
      Accés obert
      We address the interplay between two fundamentally different wave-packet localization mechanisms, namely, resonant dynamic localization due to collapse of quasienergy bands in periodic media and disorder-induced Anderson ...

    • El sensor de frente de onda Shack-Hartmann: una interesante herramienta científica que está saltando al terreno del aficionado en astronomía 

      Marzoa Domínguez, Antonio (2022-12-01)
      Article
      Accés obert
      Una herramienta para la caracterización de la calidad óptica de un sistema formador de imagen es el sensor de frente de onda Shack-Hartmann, muy empleado en óptica adaptativa. Exploraremos la historia, principios de ...

    • Electrically Driven Varifocal Silicon Metalens 

      Afridi, Adeel; Canet-Ferrer, Josep; Philippet, Laurent; Osmond, Johann; Berto, Pascal; Quidant, Romain (ACS, 2018-10-08)
      Article
      Accés obert
      Optical metasurfaces have shown to be a powerful approach to planar optical elements, enabling an unprecedented control over light phase and amplitude. At that stage, where a wide variety of static functionalities have ...

    • Estudio de mercado a través de los clientes de una óptica 

      Ahsen Ahsen, Rabab (Universitat Politècnica de Catalunya, 2018-01-29)
      Treball Final de Grau
      Accés obert
      En el següent treball es duu a terme l’estudio de mercat de les òptiques actualment.. Es mostra bàsicament el funcionament del sector òptic començant per una breu anàlisi sobre com està desenvolupat a Espanya. Seguidament, ...

    • Fast silicon photomultiplier improves signal harvesting and reduces complexity in time-domain diffuse optics 

      Dalla Mora, Alberto; Martinenghi, Edoardo; Contini, Davide; Tosi, Alberto; Boso, Gianluca; Durduran, Turgut; Arridge, Simon; Martelli, Fabrizio; Farina, Andrea; Torricelli, Alessandro; Pifferi, Antonio (OSA, 2015-06-01)
      Article
      Accés obert
      We present a proof of concept prototype of a time-domain diffuse optics probe exploiting a fast Silicon PhotoMultiplier (SiPM), featuring a timing resolution better than 80 ps, a fast tail with just 90 ps decay time-constant ...

    • Fast wavelength thermal tuning of DFB lasers for ultra dense WDM-PONs 

      Tabares Giraldo, Santiago; Polo Querol, Víctor; Prat Gomà, Josep Joan (2022-10-15)
      Article
      Accés obert
      Thermal tunability for distributed feedback lasers is generally done at slow tuning speed. We study laser current boosting and implement a pre-equalization stage for short wavelength jump, improving the tuning time to the ...

    • Femtosecond infrared intrastromal ablation and backscattering-mode adaptive-optics multiphoton microscopy in chicken corneas 

      Roso Franco, Luis; Artal, P; Gualda Manzano, Emilio José; Martínez García, M. Carmen; Roso Franco, Luis (2011-11-01)
      Article
      Accés obert
      The performance of femtosecond (fs) laser intrastromal ablation was evaluated with backscattering-mode adaptive-optics multiphoton microscopy in ex vivo chicken corneas. The pulse energy of ...

    • Formation of collimated beams behind the woodpile photonic crystal 

      Trull Silvestre, José Francisco; Maigyte, Lina; Malinauskas, Mangirdas; Mizeikis, Vygantas; Juodkazis, Saulius; Cojocaru, Crina; Rutkauskas, Marius; Peckus, Martynas; Sirutkaitis, Valdas; Staliunas, Kestutis (2011-09-09)
      Article
      Accés obert
      We experimentally observe formation of narrow laser beams behind the woodpile photonic crystal, when the beam remains well collimated in free propagation behind the crystal. We show that the collimation depends on the input ...

    • Generation of arbitrary complex quasi-non-diffracting optical patterns 

      Ortiz Ambriz, Antonio; López Aguayo, Servando; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Petrov, Dimitri; Garcia Gracia, Hipolito; Gutierrez Vega, Julio Cesar; Torner Sabata, Lluís (2013-09)
      Article
      Accés restringit per política de l'editorial
      Due to their unique ability to maintain an intensity distribution upon propagation, non-diffracting light fields are used extensively in various areas of science, including optical tweezers, nonlinear optics and quantum ...

    • Graph-based model for adaptive simulation of beam propagation in turbulent media 

      Belmonte Molina, Aniceto (Optical Society of American (OSA), 2023-05-22)
      Article
      Accés obert
      A graph-based approach uses a triangular adaptive mesh for simulating the propagation of light beams through the atmosphere. In this approach, the atmospheric turbulence and the beam wavefront are signals in a graph, with ...

    • High-speed line-camera measurements of vibrating strings 

      Pàmies Vilà, Montserrat (Universitat Politècnica de Catalunya / Aalto University, 2013)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      A recently-developed experimental equipment for optical measurements with acoustical proposes of vibrating parts of musical instruments is described in this thesis. Its methodology consists of performing optical measurements ...

    • How to automate a kinematic mount using a 3D printed arduino-based system 

      Salazar Serrano, Luis Jose; Jiménez Machado, Gerard; Pérez Torres, Juan (2018-06-01)
      Article
      Accés obert
      We demonstrate a simple, flexible and cost-effective system to automatize most of the kinematic mounts available nowadays on the market. It combines 3D-printed components, an Arduino board, stepper motors and simple ...

    • Image quality analysis of an antique microscope objective with a Shack-Hartmann wavefront sensor: an experiment of educational interest 

      Marzoa Domínguez, Antonio; Vallmitjana Rico, Santiago (2021-06-30)
      Article
      Accés obert
      In this work we report the image quality analysis of an antique microscope objective from ca 1850 by using a non-contact technique based on a Shack-Hartmann wavefront sensor. The method and the experiment are described, ...

    • Impact of lens material on objective refraction in eyes with trifocal diffractive intraocular lenses 

      Garzón Jimenez, Nuria; Poyales, Francisco; García Montero, María; Vega Lerín, Fidel; Millán Garcia-Varela, M. Sagrario; Albarrán Diego, César (2021-01-01)
      Article
      Accés obert
      Purpose: Compare subjective (Rx) and objective (ObjRx) refractions outcomes with two autorefractors models and an aberrometer in eyes implanted with a hydrophobic trifocal IOL (FineVision POD F GF, Physiol, Liége, Belgium) ...