Dr. Sandra Eloísa Balderas-Mata Profile

Dr. Sandra Eloísa Balderas-Mata

Research Professor at Universidad de Guadalajara

SPIE Involvement:

Author | Leadership Workshop Facilitator

Publications (27)

Proceedings Article | 10 October 2023 Poster + Paper

Poster + Paper

Characterization of a Shack-Hartmann type wavefront sensor for its use in an experimental aberrometer

Cristian Medina Coca, Brandon Sánchez Valencia, Emerson Gonzalez Diaz, Citlalli Almaguer Gomez, José Magaña-Chávez, Juana Medina-Márquez, Sandra Balderas-Mata

Proceedings Volume 12687, 126870I (2023) https://doi.org/10.1117/12.2676429

KEYWORDS: Monochromatic aberrations, Wavefront sensors, Zernike polynomials, Reproducibility, Statistical analysis, Measurement uncertainty, Prototyping, Wavefronts, Wavefront aberrations

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Proceedings Article | 4 October 2023 Poster + Paper

Poster + Paper

Cataractous eye fundus image enhancement by using multi-scale tone decomposition

Oscar Ramos-Soto, Diego Oliva, Jesús Gómez-Correa, Sandra Balderas-Mata

Proceedings Volume 12674, 1267417 (2023) https://doi.org/10.1117/12.2672348

KEYWORDS: Image enhancement, Eye, Visualization, Cataracts, Color, Visual analytics, Image processing, Blood vessels, Visibility, Biomedical applications

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Proceedings Article | 3 October 2023 Poster + Paper

Poster + Paper

Zernike polynomials vs circular Bessel functions to represent aberrated wavefronts

Cristian Medina Coca, Brandon Sánchez Valencia, Emerson González Díaz, José Magaña-Chávez, Joel Cervantes Lozano, Sandra Balderas-Mata

Proceedings Volume 12693, 126931M (2023) https://doi.org/10.1117/12.2676551

KEYWORDS: Wavefront aberrations, Zernike polynomials, Monochromatic aberrations, Bessel functions, Wavefronts, Wavefront reconstruction, Wavefront sensors, Prototyping, Lenses, Eye

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Proceedings Article | 30 September 2022 Paper

Paper

Preliminary results of the implementation of a low-cost Shack-Hartmann wavefront sensor

José Luis Magaña Chávez, Sandra Eloísa Balderas Mata, David I Serrano-García, Joel Cervantes-L

Proceedings Volume 12233, 122330Q (2022) https://doi.org/10.1117/12.2633186

KEYWORDS: Wavefront sensors, Sensors, Zernike polynomials, Spherical lenses, Lenses, Wavefronts, Monochromatic aberrations, Infrared sensors, Microlens array, Image processing

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Proceedings Article | 15 February 2021 Presentation + Paper

Presentation + Paper

Inner limiting membrane segmentation and surface visualization method on retinal OCT images

Oscar Ramos-Soto, Erick Rodríguez-Esparza, Marco Pérez-Cisneros, Sandra Balderas-Mata

Proceedings Volume 11600, 1160016 (2021) https://doi.org/10.1117/12.2580910

KEYWORDS: Image segmentation, Optical coherence tomography, Visualization, Image processing, Coherence imaging, Visual analytics, Retinal scanning, Image processing algorithms and systems, Image contrast enhancement, Edge detection

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Proceedings Article | 12 September 2019 Paper

Paper

Statistical validation analysis between an experimental Shack-Hartmann aberrometer and a commercial device

Adrian Macias-Mendoza, Juana Medina-Márquez, Juan José Raygoza-Panduro, Jaime David Rios-Arrañaga, Sandra Balderas-Mata

Proceedings Volume 11129, 111290T (2019) https://doi.org/10.1117/12.2529821

KEYWORDS: Eye, Wavefront sensors, Zernike polynomials, Statistical analysis, Visualization, Spherical lenses, Monochromatic aberrations, Eye models

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Proceedings Article | 27 September 2016 Paper

Paper

Analysis of the influence of the aperture size on the differences of L *a *b chromatic coordinates in a spectrocolorimeter

J. Medina-Marquez, S. Balderas-Mata, Jorge Flores

Proceedings Volume 9951, 99510P (2016) https://doi.org/10.1117/12.2238099

KEYWORDS: Colorimetry, Statistical analysis, Visible radiation, Diffusers, Ultraviolet radiation, Strontium, Plutonium, Visualization, Nomenclature, Lithium

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Proceedings Article | 14 September 2016 Paper

Paper

Statistical evaluation of the performance of an optimized adaptive optics arm for retinal imaging flood system

J. Magaña Chávez, J. Medina-Márquez, L. Valdivieso-González, S. Balderas-Mata

Proceedings Volume 9973, 99730Y (2016) https://doi.org/10.1117/12.2238061

KEYWORDS: Retinal scanning, Floods, Adaptive optics, Imaging systems, Eye, Strontium, Wavefront sensors, Cameras, Cones, Retina

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Proceedings Article | 12 September 2014 Paper

Paper

Gray coded trapezoidal fringes for 3D surface-shape measurement

Oscar Pérez, Jorge Flores, G. García-Torales, J. Muñoz-G, Horacio Soto, Sandra Balderas

Proceedings Volume 9219, 92190M (2014) https://doi.org/10.1117/12.2062499

KEYWORDS: Binary data, 3D metrology, Phase shifts, Fringe analysis, Calibration, Projection systems, Cameras, Complex systems, Nonlinear response, Computer programming

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Proceedings Article | 12 September 2014 Paper

Paper

3D shape measurement with binary phase-shifted technique and digital filters

Adriana Silva, Ricardo Legarda-Saenz, G. García-Torales, Sandra Balderas-Mata, Jorge Flores

Proceedings Volume 9219, 92190L (2014) https://doi.org/10.1117/12.2062479

KEYWORDS: Binary data, 3D metrology, Projection systems, Modulation, Gaussian filters, Digital filtering, Picosecond phenomena, Phase shifts, Phase shift keying, Linear filtering

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Proceedings Article | 22 August 2014 Paper

Paper

Construction and validation of a Shack-Hartmann type aberrometer

L. Valdivieso-González, G. Ramírez Zavaleta, E. López Olazagasti, S. Balderas-Mata, E. Tepichín Rodríguez

Proceedings Volume 9286, 92861S (2014) https://doi.org/10.1117/12.2063824

KEYWORDS: Eye, Wavefronts, Adaptive optics, Wavefront sensors, In vivo imaging, Eye models, Retina, Imaging systems, Cameras, Mirrors

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Proceedings Article | 18 November 2013 Paper

Paper

Emmetropic eyes: objective performance and clinical reference

Eduardo Tepichín-Rodríguez, Angel Cruz Felix, Estela López-Olazagasti, Sandra Balderas-Mata

Proceedings Volume 8785, 8785G5 (2013) https://doi.org/10.1117/12.2027930

KEYWORDS: Objectives, Monochromatic aberrations, Image quality, Zernike polynomials, Wavefront sensors, Wavefront aberrations, Eye, Retina, Laser optics, Data centers

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Proceedings Article | 25 October 2012 Paper

Paper

Comparison of refractive power maps from a reference surface: geometric versus Zernike power polynomials

Angel Cruz Felix, Sandra Balderas-Mata, Estela López-Olazagasti, Eduardo Tepichín-Rodríguez

Proceedings Volume 8499, 849907 (2012) https://doi.org/10.1117/12.930219

KEYWORDS: Wavefront aberrations, Eye, Refractor telescopes, Wavefronts, Cornea, Zernike polynomials, Surgery, Refraction, Optical spheres, Visual optics

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Proceedings Article | 19 October 2012 Paper

Paper

An optimized adaptive optics experimental setup for in vivo retinal imaging

S. Balderas-Mata, L. Valdivieso González, G. Ramírez Zavaleta, E. López Olazagasti, E. Tepichin Rodriguez

Proceedings Volume 8487, 84870P (2012) https://doi.org/10.1117/12.930209

KEYWORDS: Adaptive optics, Eye, Wavefronts, Imaging systems, Lenses, Retina, Monochromatic aberrations, In vivo imaging, Retinal scanning, Wavefront sensors

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Proceedings Article | 3 November 2011 Paper

Paper

Application of a new high-speed magnetic deformable mirror for in-vivo retinal imaging

Sandra Balderas-Mata, Steven Jones, Robert Zawadzki, John Werner

Proceedings Volume 8011, 801195 (2011) https://doi.org/10.1117/12.903365

KEYWORDS: Adaptive optics, Eye, In vivo imaging, Retina, Cameras, Actuators, Imaging systems, Floods, Deformable mirrors, Mirrors

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Nowadays in ophthalmologic practice several commercial instruments are available to image patient retinas in vivo. Many modern fundus cameras and confocal scanning laser ophthalmoscopes allow acquisition of two dimensional en face images of the retina with both back reflected as well as fluorescent light. Additionally, optical coherence tomography systems allow non-invasive probing of three-dimensional retinal morphology. For all of these instruments the available lateral resolution is limited by optical quality of the human eye used as the imaging objective. To improve lateral resolution and achieve diffraction-limited imaging, adaptive optics (AO) can be implemented with any of these imaging systems to correct both static and dynamic aberrations inherent in human eyes. Most of the wavefront correctors used previously in AO systems have limited dynamic range and an insufficient number of actuators to achieve diffraction-limited correction of most human eyes. Thus, additional corrections were necessary, either by trial lenses or additional deformable mirrors (DMs). The UC Davis AO flood-illuminated fundus camera system described in this paper has been previously used to acquire in vivo images of the photoreceptor mosaic and for psychophysical studies on normal and diseased retinas. These results were acquired using a DM manufactured by Litton ITEK (DM109), which has 109 actuators arranged in a hexagonal array below a continuous front-surface mirror. It has an approximate surface actuator stroke of ±2μm. Here we present results with a new hi-speed magnetic DM manufactured by ALPAO (DM97, voice coil technology), which has 97 actuators and similar inter-actuator stroke (>3μm, mirror surface) but much higher low-order aberration correction (defocus stroke of at least ±30μm) than the previous one. In this paper we report results of testing performance of the ALPAO DM for the correction of human eye aberrations. Additionally changes made to our AO flood illuminated system are presented along with images of the model eye retina and in-vivo human retina acquired with this system.

Proceedings Article | 23 September 2010 Paper

Paper

Three-wave dissipative coupled states in a two-mode medium with a square-law nonlinearity and linear optical losses

Alexandre Shcherbakov, Jewgenij Maximov, Sandra E. Balderas Mata, Daniel Sanchez Lucero, Sergey Nemov

Proceedings Volume 7750, 77500S (2010) https://doi.org/10.1117/12.872160

KEYWORDS: Light scattering, Acoustics, Crystals, Nonlinear optics, Optical components, Quartz, Scattering, Computer simulations, Polarization, Light wave propagation

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Proceedings Article | 18 February 2010 Paper

Paper

Efficiency of a one-phonon Bragg anomalous light scattering in tellurium dioxide single crystal with variously polarized incident light of visible range

Alexandre Shcherbakov, Daniel Sanchez Lucero, Sandra Eloisa Balderas-Mata

Proceedings Volume 7582, 75821B (2010) https://doi.org/10.1117/12.839879

KEYWORDS: Crystals, Light scattering, Polarization, Tellurium, Acoustics, Jones vectors, Scattering, Visible radiation, Geometrical optics, Crystal optics

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Proceedings Article | 13 February 2008 Paper

Paper

Potential dynamic range in a scheme of the acousto-optical spectrometer providing light beam apodization for a large-aperture crystalline cell with linear acoustic losses

Alexandre Shcherbakov, Abraham Luna Castellanos, Eduardo Tepichin Rodriguez, Sandra Balderas Mata

Proceedings Volume 6890, 689018 (2008) https://doi.org/10.1117/12.764174

KEYWORDS: Acoustics, Phonons, Signal attenuation, Crystals, Light scattering, Spectroscopy, Apodization, Laser crystals, Solid state physics, Information technology

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Proceedings Article | 13 February 2008 Paper

Paper

Collinear acousto-optical three-wave solitary states in a two-mode medium with a square-law nonlinearity and losses

Alexandre Shcherbakov, Jewgenij Maximov, Sandra Eloisa Balderas Mata

Proceedings Volume 6875, 68750P (2008) https://doi.org/10.1117/12.764044

KEYWORDS: Acoustics, Crystals, Process modeling, Two wave mixing, Nonlinear crystals, Scattering, Acousto-optics, Differential equations, Zinc, Astrophysics

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Proceedings Article | 30 October 2007 Paper

Paper

Upgrading the frequency resolution of spectrum analyzers for radio-astronomy due to exploiting a multi-phonon light scattering in TeO2 crystalline modulators

Alexandre Shcherbakov, Abraham Luna Casellanos, Sandra Balderas Mata, Jewgenij Maximov

Proceedings Volume 6796, 67962O (2007) https://doi.org/10.1117/12.778927

KEYWORDS: Light scattering, Crystals, Modulators, Acoustics, Scattering, Phonons, Tellurium, Modulation, Anisotropy, Laser scattering

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Proceedings Article | 26 October 2007 Paper

Paper

Optical modulators exploiting a multi-phonon light scattering in TeO2-structures

Alexandre Shcherbakov, A. Luna Castellanos, Sandra Eloisa Balderas Mata

Proceedings Volume 6796, 679615 (2007) https://doi.org/10.1117/12.778728

KEYWORDS: Light scattering, Crystals, Polarization, Scattering, Acoustics, Tellurium, Optical modulators, Optical activity, Dielectric polarization, Laser scattering

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Proceedings Article | 26 September 2007 Paper

Paper

The main peculiarities of arranging the optical scheme of acousto-optical spectrometer for the Mexican Large Millimeter Telescope

Alexandre Shcherbakov, Sandra E. Balderas Mata, Eduardo Tepichin Rodriguez, Abraham Luna Castellanos, Daniel Sanchez Lucero, Jewgenij Maximov

Proceedings Volume 6663, 66630O (2007) https://doi.org/10.1117/12.733243

KEYWORDS: Acoustics, Light scattering, Prisms, Spectroscopy, Crystals, Beam shaping, Diffraction, Glasses, Radio optics, Scattering

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Proceedings Article | 20 September 2007 Paper

Paper

Applying a two-phonon light scattering in crystals to the spectrum analysis of radio signals

Alexandre Shcherbakov, Jewgenij Maximov, Eduardo Tepichin Rodriguez, Sandra Eloisa Balderas Mata, Abraham Luna Casellanos, Jose Gabriel Aguilar Soto

Proceedings Volume 6695, 66950W (2007) https://doi.org/10.1117/12.732665

KEYWORDS: Light scattering, Acoustics, Crystals, Scattering, Signal attenuation, Tellurium, Spectrum analysis, Laser crystals, Refractive index, Signal analyzers

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Proceedings Article | 18 September 2007 Paper

Paper

Estimating the factors restricting potential dynamic range in the optical scheme of acousto-optical spectrometer for the Mexican Large Millimeter Telescope

Alexandre Shcherbakov, Sandra Balderas Mata, D. Sanchez Lucero

Proceedings Volume 6667, 66670M (2007) https://doi.org/10.1117/12.732656

KEYWORDS: Acoustics, Spectroscopy, Signal attenuation, Crystals, Phonons, Light scattering, Factor analysis, Telescopes, Apodization, Wave propagation

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Proceedings Article | 14 February 2007 Paper

Paper

Amplitude and frequency characteristics of a multiphonon light scattering in tellurium dioxide single crystal

Alexandre Shcherbakov, Sandra Eloisa Balderas Mata, Yuliya Ledeneva, Arturo Aguirre López

Proceedings Volume 6455, 645519 (2007) https://doi.org/10.1117/12.700658

KEYWORDS: Light scattering, Crystals, Acoustics, Scattering, Phase velocity, Tellurium, Anisotropy, Laser scattering, Diffraction, Nonlinear crystals

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Proceedings Article | 21 October 2004 Paper

Paper

Study of the Bessel beams with opaque obstructions along the propagation direction

M. Anguiano-Morales, Sandra Balderas-Mata, Marcela Mendez Otero, Sabino Chavez-Cerda, Marcelo Iturbe-Castillo

Proceedings Volume 5622, (2004) https://doi.org/10.1117/12.591722

KEYWORDS: Bessel beams, Opacity, Wave propagation, Diffraction, Radio propagation, Beam propagation method, Wavefronts, Geometrical optics, Particles, Light wave propagation

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Proceedings Article | 10 November 2003 Paper

Paper

Application of dynamic two-wave mixing for detection of thermal gratings in liquids with low-optical absorption

Sandra Balderas Mata, Ponciano Rodriguez Montero, Serguei Stepanov

Proceedings Volume 5191, (2003) https://doi.org/10.1117/12.505245

KEYWORDS: Signal detection, Modulation, Diffraction gratings, Liquids, Laser beam diagnostics, Absorption, Phase modulation, Two wave mixing, Thermography, Diffraction

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Showing 5 of 27 publications

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