Browsing by Subject "Optics"

Now showing items 1-20 of 103

    • A preliminary study of Lunar astronomical observatories 

      Schwarze Fernández, Johann (Universitat Politècnica de Catalunya, 2023-10-31)
      Bachelor thesis
      Open Access
      The idea of Lunar-based observatories has been gaining popularity among the scientific community during the last decades. Placing a telescope on the Moon surface not only would overcome all of the current shortcomings of ...

    • Análisis de los estudios y del mundo profesional en el ámbito de la óptica y optometría desde la perspectiva del género 

      Oyagüe López, Oihane (Universitat Politècnica de Catalunya, 2022-01-10)
      Bachelor thesis
      Open Access
      La perspectiva de gènere es refereix a la metodologia i mecanismes que ens permeten identificar, qüestionar i valorar la discriminació i exclusió de les dones, que es pretenen justificar a partir de les diferències biològiques ...

    • Asymmetric soliton mobility in competing linear-nonlinear parity-time-symmetric lattices 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2016-09-15)
      Article
      Restricted access - publisher's policy
      We address the transverse mobility of spatial solitons in competing parity-time-symmetric linear and nonlinear lattices. The competition between out-of-phase linear and nonlinear lattices results in a drastic mobility ...

    • Attosecond pulse shaping using partial phase matching 

      Austin, Dane R.; Biegert, Jens (IOP, 2014-11-04)
      Article
      Open Access

    • Automatic compensation of polarisation drifts in an optical fibre 

      Cichy Cusi, Simon (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      In days where Science Fiction uses the word ?Quantum? to justify any weird phenomena, we are actually on the edge of the Second Quantum Revolution. The ability to harness the potential of the quantum state of single particles ...

    • Binocular open-view system to perform estimations of aberrations and scattering in the human eye 

      García Guerra, Carlos Enrique; Aldaba Arévalo, Mikel; Pujol Ramo, Jaume; Arjona Carbonell, Mª Montserrat (2015-11-10)
      Article
      Open Access
      We present a system that integrates a double-pass (DP) instrument and a Hartmann-Shack (HS) wavefront sensor to provide information not only on aberrations, but also on scattering occurring in the human eye. A binocular ...

    • Brightness enhancement in Non-Hermintian VCSELs 

      Waseem Ahmed, Waqas; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (Optical Society of American (OSA), 2019)
      Conference report
      Restricted access - publisher's policy
      Vertical Cavity Surface Emitting lasers (VCSELs) are compact and efficient light sources useful for a variety of applications. However, due to lack of a transverse mode control mechanism, such lasers suffer from poor spatial ...

    • Calibration of an optical probe 

      Rodríguez Maiztegui, Maitane (Universitat Politècnica de Catalunya / Institut National Polytechnique de Grenoble, 2009)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      The aim of the experiment is to calibrate a monofiber optical probe, used in two phase gas-liquid flow, to a speed of 40 m/s. To measure the bubble velocity, the optical probe requires calibration. This procedure consists ...

    • Canvis relatius en la refracció perifèrica en escolars. 

      Alcoverro Alcázar, Sandra (Universitat Politècnica de Catalunya, 2015-06-29)
      Bachelor thesis
      Open Access
      Diversos estudis han demostrat que la retina perifèrica juga un paper important en la determinació del creixement de l’ull, que té un efecte sobre el creixement de la longitud axial, i pot participar en el procés ...

    • Canvis relatius en la refracció perifèrica en infants preescolars. 

      Salva Angles, Cristina (Universitat Politècnica de Catalunya, 2015-06-29)
      Bachelor thesis
      Open Access
      Nombrosos estudis han demostrat que el desenvolupament de l’error refractiu és un procés manipulable, fins i tot un cop finalitzat el procés d’emmetropització. S’ha suggerit que quan es fa coincidir una imatge enfocada ...

    • Comparison of OFDM with single carrier in high-data rate optical communication systems 

      Diaz Souto, Alberto (Universitat Politècnica de Catalunya, 2011-12-23)
      Master thesis (pre-Bologna period)
      Open Access
      English: Analysis of Orthogonal FDM modulation for long-haul optical communications, and validation of its performances over conventional transmission.

    • Conformational changes in matrix-isolated 6-methoxyindole: Effects of the thermal and infrared light excitations 

      Lopes Jesus, A. J.; Reva, I.; Araujo-Andrade, Cuauhtemoc; Fausto, R. (AIP, 2016-03-25)
      Article
      Open Access
      Conformational changes induced thermally or upon infrared excitation of matrix-isolated 6-methoxyindole were investigated. Narrowband near-infrared excitation of the first overtone of the N–H stretching vibration of each ...

    • Coupling plasmons and dyakonons 

      Takayama, Osamu; Artigas García, David; Torner Sabata, Lluís (2012-06-01)
      Article
      Restricted access - publisher's policy
      We study the coupling of plasmons and Dyakonov surface waves propagating at the interfaces between isotropic-birefringent-metal layered structures. Efficient coupling is shown to occur with a proper choice of the crystal ...

    • Creació i planificació estratègica d'una òptica en època de canvis 

      Pallarès Mestre, Sílvia (Universitat Politècnica de Catalunya, 2014-12-12)
      Master thesis
      Open Access
      En aquest Treball de Final de Màster, es vol portar a terme un pla de negoci per implantar una òptica en un poble costaner de Catalunya (Calafell). Explicarem i desenvoluparem tots els procediments i estratègies per convertir ...

    • Cyclic concentrator, carpet cloaks and fisheye lens via transformation plasmonics 

      Alaoui, M.; Rustomji, K.; Chang, T. M.; Tayeb, G.; Sabouroux, P.; Quidant, R.; Enoch, S.; Guenneau, S.; Abdeddaim, R. (IOP, 2016-04-01)
      Article
      Open Access
      We first review basic equations of plasmonics in anisotropic media. We recall the origin of Maxwell’s gradient index fisheye lens. We then apply tools of transformation optics to the design of a cyclic concentrator and ...

    • Descripción del doctorado en Óptica y Optometría en España un camino hacia la excelencia académica y profesional 

      Pérez Maña, Luis; Antón López, Alfonso; Hernández Verdejo, José Luis (2018-12)
      Article
      Restricted access - publisher's policy
      Estudio observacional diseñado para describir las características demográficas y sociales de los doctores en Óptica y Optometría en España, así como las características intrínsecas del propio doctorado, las dificultades ...

    • Desenvolupament i caracterització d’un star tracker basat en Raspberry Pi 

      Riba Serrano, Joan (Universitat Politècnica de Catalunya, 2023-09-12)
      Bachelor thesis
      Open Access
      In astronomy and the aerospace world, determining the orientation or attitude of a system in space is of great importance, whether it's simply to determine observations or to successfully carry out space missions. One of ...

    • Design of adaptative digital filters for phase extraction in complex fringe patterns obtained using the Ronchi test 

      Caum Aregay, Jesús; Arasa Marti, Jose; Royo Royo, Santiago; Ares Rodríguez, Miguel (2012-02-15)
      Article
      Open Access

    • Design, implementation and test of a routine Light Sheet fluorescence microscope 

      Escobet Montalbán, Adrià (Universitat Politècnica de Catalunya, 2015-06)
      Bachelor thesis
      Open Access
      Microscopy has revealed an astonishing new world that was previously invisible to our eyes. Unfortunately, we still have very little knowledge of how life actually works, and for that reason new powerful microscopy techniques ...

    • Development of a design and optimization tool for axial mirror supports of large telescopes 

      Blanco Bravo, Iker; Casamor Martinell, Oriol; Marzoa Domínguez, Antonio (2023-02)
      Article
      Open Access
      The present paper describes a parametric design and optimization tool [Support Optimization and Design Tool (SODT)], used to evaluate passive axial support positions on circular solid meniscus mirrors. The developed tool ...