Recent Submissions

  • Optical technologies for the improvement of skin cancer diagnosis: a review 

    Rey Barroso, Laura; Peña Gutiérrez, Sara; Yáñez Alvarado, Carlos René; Burgos Fernández, Francisco Javier; Vilaseca Ricart, Meritxell; Royo Royo, Santiago (Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-02)
    Article
    Open Access
    The worldwide incidence of skin cancer has risen rapidly in the last decades, becoming one in three cancers nowadays. Currently, a person has a 4% chance of developing melanoma, the most aggressive form of skin cancer, ...
  • Step height standards based on self-assembly for 3D metrology of biological samples 

    Järvinen, Hannu; Kassamakov, I.; Viitala, T.; Bermúdez Porras, Carlos; Artigas Pursals, Roger; Martínez Marin, Pol (2020-09-01)
    Article
    Open Access
    Modern microscopes and profilometers such as the coherence scanning interferometer (CSI) approach sub-nm precision in height measurements. Transfer standards at all measured size scales are needed to guarantee traceability ...
  • Spectroscopic evaluation of red blood cells of thalassemia patients with confocal microscopy: a pilot study 

    Rey Barroso, Laura; Roldan, Monica; Burgos Fernández, Francisco Javier; Gassiot Riu, Susanna; Ruiz Llobet, Anna; Isola, Ignacio; Vilaseca Ricart, Meritxell (Multidisciplinary Digital Publishing Institute (MDPI), 2020)
    Article
    Open Access
    Hemoglobinopathies represent the most common single-gene defects in the world and pose a major public health problem, particularly in tropical countries, where they occur with high frequency. Diagnosing hemoglobinopathies ...
  • Geometric model and calibration method for a solid-state LiDAR 

    García Gómez, Pablo; Royo Royo, Santiago; Rodrigo Arcay, Noel; Casas Pla, Josep Ramon (Multidisciplinary Digital Publishing Institute (MDPI), 2020-05-20)
    Article
    Open Access
    This paper presents a novel calibration method for solid-state LiDAR devices based on a geometrical description of their scanning system, which has variable angular resolution. Determining this distortion across the entire ...
  • New cost-effective sensor for the characterization of automotive headlamps by measurements in the near field 

    Royo Royo, Santiago; Arranz, María Jesús; Arasa, Josep; Cattoen, Michel; Bosch, Thierry (Elsevier, 2006-12-01)
    Article
    Open Access
    Nowadays, European Normative regarding headlamp validation evaluates the photometric distribution of the source as a series of illumination values measured at a plane placed 25 m away from the light source. An innovative ...
  • Micrometric noncontact profiler for optical quality surfaces 

    Royo Royo, Santiago; Arasa, Josep; Caum Aregay, Jesús (2001-12-01)
    Article
    Restricted access - publisher's policy
    A non-contact technique for obtaining accurate profiles of optical qualitysurfaces with micrometric accuracy has been developed. The technique isbased on the Ronchi test principle, that is, on the study of the interaction ...
  • Texture evaluation of automotive coatings by means of a gonio-hyperspectral imaging system based on light-emitting diodes 

    Burgos Fernández, Francisco Javier; Pujol Ramo, Jaume; Perales Romero, Esther; Martínez Verdú, Francisco Miguel; Vilaseca Ricart, Meritxell (Multidisciplinary Digital Publishing Institute (MDPI), 2020-03-27)
    Article
    Open Access
    Sparkle and graininess are textural effects that appear as intrinsic spatial features of coatings containing goniochromatic pigments, whereas others such as mottling are undesired outcomes. In this study, we present new ...
  • Terahertz-based system for dehydration analysis of hydrogel contact lenses 

    Burgos Fernández, Francisco Javier; Guaus Guerrero, Ester; Martínez, Cristina; Vilaseca Ricart, Meritxell (2019)
    Article
    Open Access
    The use of terahertz-based techniques has grown very fast since they are capable of performingevaluations at molecular level, being very suitable for the analysis of biological samples and bioma-terials such as those for ...
  • An overview of lidar imaging systems for autonomous vehicles 

    Royo Royo, Santiago; Ballesta Garcia, Maria (Multidisciplinary Digital Publishing Institute, 2019-10-01)
    Article
    Open Access
    Lidar imaging systems are one of the hottest topics in the optronics industry. The need to sense the surroundings of every autonomous vehicle has pushed forward a race dedicated to deciding the final solution to be ...
  • Experimental characterization of the speckle pattern at the output of a multimode optical fiber 

    Halpaap, Donatus; Tiana Alsina, Jordi; Vilaseca Ricart, Meritxell; Masoller Alonso, Cristina (2019-09-30)
    Article
    Open Access
    Speckle patterns produced by coherent waves interfering with each other are undesirable in many imaging applications (for example, in laser projection systems) but on the other hand, they contain useful information that ...
  • Confocal flowmeter based on self-mixing interferometry for real-time velocity profiling of turbid liquids flowing in microcapillaries 

    Yáñez Alvarado, Carlos René; Azcona Guerrero, Francisco Javier; Royo Royo, Santiago (2019-08-19)
    Article
    Open Access
    We propose a new confocal device for flow profiling in microcapillaries. A viewfinder system is developed using a visible light microscope, allowing focusing with high precision an 830 nm Fabry-Perot laser diode on a ...
  • Fast visible and extended nearinfrared multispectral fundus camera 

    Alterini, Tommaso; Díaz Douton, Fernando; Burgos Fernández, Francisco Javier; Gonzalez, Laura; Mateo, Carlos; Vilaseca Ricart, Meritxell (2019-09)
    Article
    Open Access
    We present a multispectral fundus camera that performs fast imaging of the ocular posterior pole in the visible and near-infrared (400 to 1300 nm) wavelengths through 15 spectral bands, using a flashlight source made of ...

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