Dr. Rosario Porras-Aguilar Profile

Dr. Rosario Porras-Aguilar

Associate Professor

SPIE Involvement:

Proceedings Article | 12 March 2024 Poster + Paper

Quantitative phase microscopy in a single-shot using the Pancharatnam-Berry geometric phase

Ana Espinosa-Momox, Brandon Norton, Rosario Porras-Aguilar

Proceedings Volume 12852, 128520P (2024) https://doi.org/10.1117/12.3009942

KEYWORDS: Polarization, Liquid crystals, Cameras, Microscopy, Linear polarizers, Modulators, Anisotropy, Sensors, Polarimetry, Imaging systems

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Proceedings Article | 31 May 2023 Presentation

Tools to evaluate the quality of optical vortex generated by the SLM

Mateusz Szatkowski, Brandon Norton, Jan Masajada, Rosario Porras-Aguilar

Proceedings Volume 12574, 125740U (2023) https://doi.org/10.1117/12.2669589

KEYWORDS: Optical vortices, Spatial light modulators, Spiral phase plates, MATLAB, Laboratories, Imperfections, Digital holography, Alignment procedures

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Proceedings Article | 3 October 2022 Presentation + Paper

Single-shot quantitative phase microscopy in common-path configuration

Brandon Norton, Bryce Evans, Juan Viveros-Escoto, Rosario Porras-Aguilar

Proceedings Volume 12223, 122230H (2022) https://doi.org/10.1117/12.2643364

KEYWORDS: Liquid crystals, Microscopy, Polarization, Phase imaging, Molecules, Imaging systems, Phase shifts, Nonlinear filtering, Modulation

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Proceedings Article | 21 August 2020 Presentation + Paper

Quantitative phase imaging using azobenzene liquid crystal

Amber Galeana, Rosario Porras-Aguilar

Proceedings Volume 11490, 114900Y (2020) https://doi.org/10.1117/12.2570589

KEYWORDS: Liquid crystals, Phase imaging, Phase shift keying, Phase measurement, Modulation, Filtering (signal processing), Polarization, Image filtering, Nonlinear filtering, Imaging systems

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Proceedings Article | 21 August 2020 Presentation + Paper

Numerical integration of slope data with application to deflectometry

Ana Ramirez-Andrade, Rosario Porras-Aguilar, Konstantinos Falaggis

Proceedings Volume 11490, 1149009 (2020) https://doi.org/10.1117/12.2570600

KEYWORDS: Deflectometry, Numerical integration, Optics manufacturing, Optical testing, Aspheric metrology, Optical metrology

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Proceedings Article | 18 August 2018 Presentation + Paper

Arbitrary phase shifting in diffraction common path interferometry

Fatemeh HadavandMirzaee, Desmond Williams, Thomas Suleski, Rosario Porras-Aguilar

Proceedings Volume 10749, 107490V (2018) https://doi.org/10.1117/12.2320856

KEYWORDS: Phase shifting, Diffraction gratings, Interferometry, Microscopy, Spatial filters, Phase shifts, Reconstruction algorithms, Visualization, Phase imaging

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Proceedings Article | 18 August 2018 Paper

Multi-wavelength phase unwrapping: a versatile tool for extending the measurement range, breaking the Nyquist limit, and encrypting optical communications

Konstantinos Falaggis, Ana Hiza Ramirez-Andrade, David Towers, Catherine Towers, Rosario Porras-Aguilar

Proceedings Volume 10749, 1074913 (2018) https://doi.org/10.1117/12.2321987

KEYWORDS: Interferometers, Interferometry, Phase measurement, Metrology, Phase interferometry, Optical communications

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Proceedings Article | 18 August 2018 Paper

Grey-level coding for structured-light illumination systems

Konstantinos Falaggis, Rosario Porras-Aguilar

Proceedings Volume 10749, 107490F (2018) https://doi.org/10.1117/12.2322050

KEYWORDS: 3D metrology, Modulation transfer functions, Phase measurement, Phase shifting, Deflectometry, Fringe analysis, Environmental sensing, Phase shifts

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Proceedings Article | 24 August 2015 Paper

Implementation of focusing and redirecting light through highly scattering media

B. Coyotl-Ocelotl, R. Porras-Aguilar, R. Ramos-Garcia, J. C. Ramirez-San-Juan

Proceedings Volume 9660, 96601X (2015) https://doi.org/10.1117/12.2202820

KEYWORDS: Spatial light modulators, Scattering media, Light scattering, Wavefronts, Sensors, Detection and tracking algorithms, Cameras, Image segmentation, Light wave propagation, Tissue optics

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Proceedings Article | 18 November 2013 Paper

Coupling for capturing an displaying hologram systems for real-time digital holographic interferometry

Rosario Porras-Aguilar, Weronika Zaperty, Malgorzata Kujawinska

Proceedings Volume 8785, 87856S (2013) https://doi.org/10.1117/12.2021692

KEYWORDS: Digital holography, Holographic interferometry, Holograms, Wavefronts, Spatial light modulators, Cameras, Reconstruction algorithms, Numerical simulations, Phase shifts, Holography

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Conventional (analog) holographic interferometry (HI) has been used as a powerful technique in optical metrology since sixties of XX century. However, its practical applications have been constrained because of the cumbersome procedures required for holographic material development. Digital holography has brought significant simplifications due to digital capture of holograms and their further numerical reconstruction and manipulation of reconstructed phases and amplitudes. These features are the fundamentals of double exposure digital holographic interferometry which nowadays is used in such applications as industrial inspection, medical imaging, microscopy and metrology. However another very popular HI technique, namely real time holographic interferometry has not been demonstrated in its digital version. In this paper we propose the experimental-numerical method which allows for real-time DHI implementation. In the first stage a set of digital phase shifted holograms of an object in an initial condition is captured and the phase of an object wavefront in the hologram plane is calculated. This phase is used to address a spatial light modulator, which generates the initial object wavefront. This wavefront (after proper SLM calibration) propagates toward an object and interfere with an actual object wavefront giving real-time interference fringes. The procedure works correctly in the case when CCD camera and SLM LCOS pixel sizes are the same. Usually it is not the case. Therefore we had proposed two different methods which allow the overcome of this mismatch pixel problem. The first one compensates for lateral magnification and the second one is based on re-sampling of a captured phase. The methods are compared through numerical simulations and with experimental data. Finally, the implications of setting up the experiment with the object reference phase compensated by the two approaches are analyzed and the changes in an object are monitored in real time by DHI.

Proceedings Article | 26 October 2011 Paper

Self-focusing mechanism in nematic liquid crystals with sub-millisecond response

Rosario Porras-Aguilar, Jeroen Beeckman, Kristiaan Neyts

Proceedings Volume 8011, 80113W (2011) https://doi.org/10.1117/12.903350

KEYWORDS: Liquid crystals, Modulation, Laser beam propagation, Thermal effects, Diffraction, Infrared lasers, Polarization, Spatial solitons, Refractive index, Temperature metrology

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Proceedings Article | 27 August 2008 Paper

Polarization-dependent nonlinear phase contrast by using dye-doped nematic liquid crystals

Rosario Porras-Aguilar, Marcelo Iturbe-Castillo, Julio Ramirez-San-Juan, Oscar Baldovino-Pantaleon, David Sanchez de la Llave, Ruben Ramos-Garcia, Luis Arroyo-Carrasco

Proceedings Volume 7050, 705006 (2008) https://doi.org/10.1117/12.791556

KEYWORDS: Phase contrast, Polarization, Nonlinear filtering, Liquid crystals, Optical filters, Nonlinear optics, Tunable filters, Visualization, Phase shift keying, Microscopes

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Proceedings Article | 21 October 2004 Paper

Wavefront coding technology in the optical design of astronomical instruments

Rosario Porras, Sergio Vazquez-Montiel, J. Castro

Proceedings Volume 5622, (2004) https://doi.org/10.1117/12.592196

KEYWORDS: Wavefronts, Optical design, Astronomy, Monochromatic aberrations, Chromatic aberrations, Optical transfer functions, Spectrographs, Deformable mirrors, Astronomical telescopes, Telescopes

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