Ara es mostren els items 1-11 de 11

    • Active illumination focus variation 

      Bermúdez, Carlos; Martínez Marín, Pol; Cadevall Artigues, Cristina; Artigas Pursals, Roger (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
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      Focus Variation (FV) has been successfully employed for the three-dimensional measurement of rough surfaces. The technique relies on scanning the sample under inspection across the depth of focus of a high numerical aperture ...
    • Confocal unrolled areal measurements of cylindrical surfaces 

      Matilla Sánchez, Aitor; Bermúdez Porras, Carlos; Mariné, Jordi; Martínez López, David; Cadevall Artigues, Cristina; Artigas Pursals, Roger (2017)
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      Confocal microscopes are widely used for areal measurements thanks to its good height resolution and the capability to measure high local slopes. For the measurement of large areas while keeping few nm of system noise, it ...
    • Development of confocal-based techniques for shape measurements on structured surfaces containing dissimilar materials 

      Cadevall Artigues, Cristina; Artigas Pursals, Roger; Laguarta Bertran, Ferran (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2003)
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      One of the applications, which is considered to be very difficult to carry out with most optical imaging profilers, is the shape and texture measurements of structured surfaces obtained from the superposition of various ...
    • Metrological characterization of different methods for recovering the optically sectioned image by means of structured light 

      Martínez Marín, Pol; Bermúdez, Carlos; Carles, G.; Cadevall Artigues, Cristina; Matilla Sánchez, Aitor; Mariné, Jordi; Artigas Pursals, Roger (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2021)
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      Imaging confocal microscopy (ICM) and focus variation (FV) are two of the most used technologies for 3D surface metrology. Both methods rely on the depth of focus of the microscope objective, which depends on its numerical ...
    • Novel stent optical inspection system 

      Bermúdez, Carlos; Laguarta Bertran, Ferran; Cadevall Artigues, Cristina; Matilla Sánchez, Aitor; Ibañez Ayala, Sergi; Artigas Pursals, Roger (Optical Society of American (OSA), 2016)
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      Stent quality control is a critical process. Coronary stents have to be inspected 100% so no defective stent is implanted into a human body. Skilled operators currently perform the quality process control visually, and ...
    • Residual flatness error correction in three-dimensional imaging confocal microscopes 

      Bermúdez, Carlos; Felgner, André; Martínez Marín, Pol; Matilla Sánchez, Aitor; Cadevall Artigues, Cristina; Artigas Pursals, Roger (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2018)
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      Imaging Confocal Microscopes (ICM) are highly used for the assessment of three-dimensional measurement of technical surfaces. The benefit of an ICM in comparison to an interferometer is the use of high numerical aperture ...
    • Single-shot optical surface profiling using extended depth of field 3D microscopy 

      Martínez Marín, Pol; Bermúdez, Carlos; Artigas Pursals, Roger; Carles Santancana, Guillem (2022-09-12)
      Article
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      The measurement of three-dimensional samples at high speed is essential for many applications, either due to the requirement for measuring samples that change fast over time, or due to the requirement of reducing the ...
    • Stent optical inspection system calibration and performance 

      Bermúdez Porras, Carlos; Laguarta Bertran, Ferran; Cadevall Artigues, Cristina; Matilla, Aitor; Ibañez Ayala, Sergi; Artigas Pursals, Roger (Optical Society of American (OSA), 2017-03-20)
      Article
      Accés obert
      Implantable medical devices, such as stents, have to be inspected 100% so no defective ones are implanted into a human body. In this paper, a novel optical stent inspection system is presented. By the combination of a high ...
    • 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 Marín, Pol (2020-09-01)
      Article
      Accés obert
      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 ...
    • Three-dimensional imaging confocal profiler without in-plane scanning 

      Martínez Marín, Pol; Bermúdez, Carlos; Cadevall Artigues, Cristina; Matilla Sánchez, Aitor; Artigas Pursals, Roger (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
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      Most 3D metrological microscopes used today require a scanning through the optical axis, which is time consuming. The common techniques are Coherence Scanning Interferometry (CSI), Imaging Confocal Microscopy (ICM), and ...
    • Three-dimensional measurements with a novel technique combination of confocal and focus variation with a simultaneous scan 

      Matilla, Aitor; Mariné, Jordi; Perez, J.; Cadevall Artigues, Cristina; Artigas Pursals, Roger (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2016)
      Text en actes de congrés
      Accés obert
      The most common optical measurement technologies used today for the three dimensional measurement of technical surfaces are Coherence Scanning Interferometry (CSI), Imaging Confocal Microscopy (IC), and Focus Variation ...