Prof. Santiago Vallmitjana Rico Profile

Prof. Santiago Vallmitjana Rico

Professor Emeritus at Univ de Barcelona

SPIE Involvement:

Author

Publications (37)

SPIE Journal Paper | 21 May 2024 Open Access

Dealing with telescope magnification and resolution: recreating Galileo’s observations in the lab

Antonio Marzoa, Santiago Vallmitjana

OE, Vol. 63, Issue 07, 071412, (May 2024) https://doi.org/10.1117/12.10.1117/1.OE.63.7.071412

KEYWORDS: Telescopes, Lenses, Saturn, Optical engineering, Monochromatic aberrations, Optical components, Equipment, Photonics, Design, Optical aberrations

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Proceedings Article | 26 June 2017 Paper

Using Shack-Hartmann wavefront sensors and Zernike coefficients for beam characterisation: numerical procedures

Salvador Bosch, Santiago Vallmitjana, Antonio Marzoa, Justo Arines, Eva Acosta

Proceedings Volume 10333, 1033318 (2017) https://doi.org/10.1117/12.2271322

KEYWORDS: Wavefront sensors, Wave propagation, Beam propagation method, Zernike polynomials, Modeling, Wavefronts, Ray tracing, Microlens, Geometrical optics, MATLAB, Sensors, Beam shaping

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Proceedings Article | 4 May 2010 Paper

Use of spatial light modulators in wavefront coding for field imaging: adaptation of the filter design procedure

Carme Ferran, Santiago Vallmitjana, Salvador Bosch

Proceedings Volume 7723, 772307 (2010) https://doi.org/10.1117/12.854541

KEYWORDS: Spatial light modulators, Wavefronts, Imaging systems, Point spread functions, Calibration, Image filtering, Charge-coupled devices, Phase shift keying, Optical aberrations, Liquid crystals

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Proceedings Article | 22 August 2009 Paper

Ray tracing, wavefronts, and caustics: use of Shack-Hartmann wavefront sensor for analyzing light propagation

Salvador Bosch, Santiago Vallmitjana, Carme Ferran

Proceedings Volume 7429, 74290L (2009) https://doi.org/10.1117/12.826207

KEYWORDS: Wavefronts, Wavefront sensors, Sensors, Ray tracing, Zernike polynomials, Light wave propagation, Visualization, Point spread functions, Monochromatic aberrations, Optical sensors

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Proceedings Article | 11 September 2006 Paper

Design of a low-cost interactive holographic optical tweezers system

E. Pleguezuelos, J. Andilla, A. Carnicer, E. Martín-Badosa, S. Vallmitjana, M. Montes-Usategui

Proceedings Volume 6326, 63262Q (2006) https://doi.org/10.1117/12.680593

KEYWORDS: Holograms, Modulators, Microscopes, Optical tweezers, Aberration correction, LCDs, Objectives, Phase shift keying, Optical design, Modulation

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Proceedings Article | 1 February 2006 Paper

Attempts to encourage secondary students to initiate university studies of physics in the University of Barcelona based on experiments related to optics

Santiago Vallmitjana

Proceedings Volume 6034, 603422 (2006) https://doi.org/10.1117/12.668178

KEYWORDS: Physics, Sun, Holograms, Magnetism, Holography, Liquids, Nitrogen, Iron, Internet, 3D image processing

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Proceedings Article | 24 October 2005 Open Access

Teaching (and learning) optics using interactive simulations: the JavaOptics course

A. Carnicer, J. Andilla, J. Ferré, I. Juvells, E. Martín-Badosa, J. de F. Moneo, E. Pleguezuelos, R. Tudela, S. Vallmitjana

Proceedings Volume 9664, 96641G (2005) https://doi.org/10.1117/12.2207725

KEYWORDS: Java, Optical simulations, Physics, Reflection, Dielectrics, Interferometers, Photonics, Dielectric polarization, Refraction, Software development

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SPIE Journal Paper | 1 November 2004

Wavefront reconstruction by adding modulation capabilities of two liquid crystal devices

Raul Tudela, Estela Martín-Badosa, Ignasi Juan Labastida, Santiago Vallmitjana, Arturo Carnicer

OE, Vol. 43, Issue 11, (November 2004) https://doi.org/10.1117/12.10.1117/1.1803551

KEYWORDS: Phase modulation, LCDs, Modulation, Phase shift keying, Holograms, Wavefronts, Modulators, 3D image reconstruction, Error analysis, Spatial light modulators

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Proceedings Article | 21 October 2004 Paper

Characterization of a reflective spatial light modulator by determination of its Jones matrix

J. Andilla, Estela Martin-Badosa, Santiago Vallmitjana

Proceedings Volume 5622, (2004) https://doi.org/10.1117/12.591964

KEYWORDS: Spatial light modulators, Polarization, Modulators, Jones vectors, Reflectivity, Ferroelectric LCDs, Complex systems, Modulation, Polarizers, Phase modulation

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Proceedings Article | 19 November 2003 Paper

Full complex Fresnel holograms displayed on liquid crystal devices

Raul Tudela, Estela Martin-Badosa, Ignasi Juan Labastida, Encarnacion Pleguezuelos, Santiago Vallmitjana, Ignacio Juvells, Arturo Carnicer

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.524849

KEYWORDS: LCDs, Holograms, Modulation, Ferroelectric LCDs, Phase shift keying, Digital holography, Wavefronts, Reflectivity, Image processing, Image quality

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Proceedings Article | 19 November 2003 Paper

Variance of correlation peak heights in a JTC due to an aberrated optical Fourier-transform system

Julio Perez-Tudela, Ignacio Juvells, Mario Montes-Usategui, Arturo Carnicer, Santiago Vallmitjana

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.524840

KEYWORDS: Optical correlators, Joint transforms, Transform theory, Image quality, Diffraction, Optical aberrations, Fourier optics, LCDs, Charge-coupled devices, Image acquisition

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Proceedings Article | 19 November 2003 Paper

On-line applet-based optics course for undergraduate students

Arturo Carnicer, Salvador Bosch, Josep Ferre, Ignacio Juvells, Ignasi Juan Labastida, Estela Martin-Badosa, J. de F. Moneo, Encarnacion Pleguezuelos, Raul Tudela, Santiago Vallmitjana

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.523640

KEYWORDS: Java, Optical design, Ray tracing, Dielectric filters, Far-field diffraction, Image processing, Physical phenomena, Optical instrument design, Eye, Human vision and color perception

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Proceedings Article | 10 November 2003 Paper

Reconstruction of Fresnel holograms using partial wavefront information

Raul Tudela, Estela Martin-Badosa, Ignasi Labastida, Santiago Vallmitjana, Arturo Carnicer

Proceedings Volume 5181, (2003) https://doi.org/10.1117/12.503701

KEYWORDS: LCDs, Holograms, Modulation, Phase modulation, Phase shift keying, Wavefronts, Error analysis, Modulators, Holography, Spatial light modulators

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Proceedings Article | 23 October 2003 Paper

Generalization of the Jared-Ennis method to complex transmittance objects for the generation of synthetic discriminant function filters

Encarnacion Pleguezuelos, Ignasi Labastida, Santiago Vallmitjana, Arturo Carnicer

Proceedings Volume 5202, (2003) https://doi.org/10.1117/12.503705

KEYWORDS: Image filtering, Modulation, LCDs, Phase shift keying, Optical correlators, Nonlinear filtering, Transmittance, Optical filters, Phase only filters, Spatial light modulators

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Proceedings Article | 26 December 2001 Paper

Influence of the aberrations of optical Fourier-transform systems in a joint transform correlator

Julio Perez-Tudela, Mario Montes-Usategui, Ignacio Juvells, Arturo Carnicer, Santiago Vallmitjana

Proceedings Volume 4435, (2001) https://doi.org/10.1117/12.451157

KEYWORDS: Transform theory, Optical correlators, Fourier transforms, Joint transforms, Diffraction, Spatial light modulators, Ray tracing, Modulators, Geometrical optics, CCD cameras

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Proceedings Article | 30 November 2001 Paper

Optical correlation from projections of 3D objects

Santiago Vallmitjana, Ignacio Prades Juvells, Arturo Carnicer, Mario Montes-Usategui, Estela Martin-Badosa, Ignasi Juan Labastida, F. Rodriguez-Miguel, R. Tudela

Proceedings Volume 10302, 1030209 (2001) https://doi.org/10.1117/12.449688

KEYWORDS: 3D acquisition, Optical correlators, Image processing, 3D image processing, Image filtering, 3D scanning, 3D modeling, Spatial light modulators, Object recognition, Target detection

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Proceedings Article | 24 May 2000 Paper

Three-dimensional scanner for the automatic generation of optical correlator filters

F. Rodriguez-Miguel, R. Tudela, Mario Montes-Usategui, Ignacio Juvells, Santiago Vallmitjana

Proceedings Volume 4089, (2000) https://doi.org/10.1117/12.386821

KEYWORDS: 3D scanning, Cameras, Optical filters, Image filtering, Optical correlators, 3D modeling, 3D acquisition, Laser scanners, Calibration, Tin

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Proceedings Article | 24 May 2000 Paper

Analysis and optimization of convergent Fourier-transform setups for optical correlators

Julio Perez-Tudela, Mario Montes-Usategui, Ignacio Juvells, Santiago Vallmitjana

Proceedings Volume 4089, (2000) https://doi.org/10.1117/12.386819

KEYWORDS: Fourier transforms, Optical correlators, Diffraction, Modulators, Optical filters, Computer simulations, Light sources, Spherical lenses, Wavefronts, Spatial light modulators

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Proceedings Article | 24 May 2000 Paper

On-axis joint transform correlation based on the interferometric acquisition of the output plane

Ignasi Juan Labastida, Arturo Carnicer, Ignacio Juvells, Santiago Vallmitjana

Proceedings Volume 4089, (2000) https://doi.org/10.1117/12.386859

KEYWORDS: LCDs, Joint transforms, Interferometry, Binary data, Modulation, Modulators, Phase shifts, Fourier transforms, CCD cameras, Phase shift keying

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Proceedings Article | 2 June 1999 Open Access

Characterization of VGA liquid crystal panels with partial phase-only modulation: application to pattern recognition

S. Vallmitjana, Ignasi Juan Labastida, Estela Martin-Badosa, Arturo Carnicer, Ignacio Juvells

Proceedings Volume 10296, 1029605 (1999) https://doi.org/10.1117/12.365915

KEYWORDS: Liquid crystals, Phase shift keying, Modulation, Pattern recognition, LCDs, Optical correlators, Phase measurement, Optical filters, Optoelectronics, Data processing

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Proceedings Article | 2 July 1998 Paper

Interferometric characterization of GRIN lenses for ophthalmic uses

J. de F. Moneo, Ignacio Juvells, Santiago Vallmitjana, Salvador Bosch, Arturo Carnicer, Ignasi Juan Labastida, Julio Perez-Tudela

Proceedings Volume 3405, (1998) https://doi.org/10.1117/12.312729

KEYWORDS: Interferometry, Diffusion, Computer simulations, Lenses, Refractive index, Ion exchange, GRIN lenses, Spherical lenses, Frame grabbers, Charge-coupled devices

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Proceedings Article | 2 July 1998 Paper

Ray tracing for ophthalmic optics: specific developments for GRIN materials

J. de F. Moneo, Ignacio Juvells, Santiago Vallmitjana, Salvador Bosch, Arturo Carnicer, Ignasi Juan Labastida, Julio Perez-Tudela

Proceedings Volume 3405, (1998) https://doi.org/10.1117/12.312730

KEYWORDS: GRIN lenses, Monochromatic aberrations, Ray tracing, Eye, Refractive index, Lens design, Ophthalmic optics, Image acquisition, Software, Glasses

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Proceedings Article | 22 May 1998 Paper

Multiple-image control with an 8-bit frame grabber: use in a Vander Lugt correlator

Ignasi Juan Labastida, Arturo Carnicer, Estela Martin-Badosa, Santiago Vallmitjana, Ignacio Juvells

Proceedings Volume 3490, (1998) https://doi.org/10.1117/12.308918

KEYWORDS: LCDs, Frame grabbers, Optical correlators, Electronics, Image filtering, Control systems, Satellites, Phase modulation, RGB color model, Diffraction

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Proceedings Article | 22 May 1998 Paper

Preprocessing of images with signal-dependent noise in correlation

Josep Ferre-Borrull, Santiago Vallmitjana, Salvador Bosch

Proceedings Volume 3490, (1998) https://doi.org/10.1117/12.308922

KEYWORDS: Interference (communication), Image processing, Image filtering, Signal to noise ratio, Optical correlators, Optimal filtering, Speckle, Signal processing, Electronic filtering, Error analysis

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Proceedings Article | 19 August 1997 Paper

Application of the Kolmogorov-Smirnov test for the recognition of gray-scale templates

Josep Ferre-Borrull, Santiago Vallmitjana, Salvador Bosch, Xavier Fernandez

Proceedings Volume 3101, (1997) https://doi.org/10.1117/12.281268

KEYWORDS: Detection and tracking algorithms, Target detection, Binary data, Algorithm development, Pattern recognition, Target recognition, Chlorine, Machine vision, Optical correlators, Visibility

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Proceedings Article | 19 August 1997 Paper

Optical object identification by means of a joint-transform phase-only correlator using a Bi12SiO20 crystal in the Fourier domain

Colin Cartwright, Santiago Vallmitjana, N. Cook, Arturo Carnicer, W. Gillespie, Ignacio Juvells

Proceedings Volume 3101, (1997) https://doi.org/10.1117/12.281301

KEYWORDS: Optical correlators, Crystals, Joint transforms, Liquid crystals, Fourier transforms, Binary data, Laser crystals, Modulation, Spatial light modulators, Optical pattern recognition

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Proceedings Article | 19 August 1997 Paper

Spatial filtering by choosing an appropriate threshold function in a binary joint-transform correlator

Arturo Carnicer, Santiago Vallmitjana, Ignacio Juvells

Proceedings Volume 3101, (1997) https://doi.org/10.1117/12.281272

KEYWORDS: Phase only filters, Optical correlators, Electronic filtering, Binary data, Spatial filters, Joint transforms, Signal to noise ratio, Spatial light modulators, Image filtering, Satellites

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Proceedings Article | 26 August 1996 Paper

Statistical test for the recognition of binary templates in gray-scale images

Xavier Fernandez, Josep Ferre-Borrull, Estela Martin-Badosa, Salvador Bosch, Santiago Vallmitjana

Proceedings Volume 2785, (1996) https://doi.org/10.1117/12.248547

KEYWORDS: Binary data, Optical correlators, Joint transforms, Target detection, Spatial light modulators, Fourier transforms, Mathematical morphology, Optical pattern recognition, Image processing, Pattern recognition

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Proceedings Article | 26 August 1996 Paper

Improvement of the discrimination capability of correlation techniques by the use of fuzzy logic

Bernd Gutmann, Thomas Wolf, H. Weber, Josep Ferre-Borrull, Salvador Bosch, Santiago Vallmitjana

Proceedings Volume 2785, (1996) https://doi.org/10.1117/12.248562

KEYWORDS: Fuzzy logic, Foam, Signal detection, Electronic filtering, Temperature metrology, Pattern recognition, Detection and tracking algorithms, Stress analysis, Experimental mechanics, Logic

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Proceedings Article | 23 August 1996 Paper

Joint transform correlator using photorefractie Bi12SiO20 crystal with improved discrimination

Santiago Vallmitjana, Colin Cartwright, Arturo Carnicer, N. Cook, Ignacio Juvells, W. Gillespie

Proceedings Volume 2774, (1996) https://doi.org/10.1117/12.246724

KEYWORDS: Phase only filters, Joint transforms, Optical correlators, Crystals, Image filtering, Nonlinear filtering, Fourier transforms, Liquid crystals, Holography, Optical filters

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Proceedings Article | 23 November 1994 Paper

Experimental recognition using spatial filtering in a linear joint transform optical correlator

Santiago Vallmitjana, Arturo Carnicer, Estela Martin-Badosa, Ignacio Juvells

Proceedings Volume 2249, (1994) https://doi.org/10.1117/12.196091

KEYWORDS: Phase only filters, Fourier transforms, 3D vision, Optical correlators, Joint transforms, Optical filters, Spatial filters, Optical pattern recognition, Liquid crystals, Electronic filtering

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Proceedings Article | 4 November 1994 Paper

New algorithm for single wavelength ellipsometry of samples consisting of two absorbing layers

Salvador Bosch, Santiago Vallmitjana, Francisco Monzonis

Proceedings Volume 2253, (1994) https://doi.org/10.1117/12.192055

KEYWORDS: Refractive index, Ellipsometry, Statistical analysis, Silicon, Reflection, Polarization, Thin films, Coating, Optical testing, Mineralogy

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Proceedings Article | 29 September 1994 Paper

Improving contrast in optical Fourier transforms with spatial light modulators: use in optical correlation

Santiago Vallmitjana, Estela Martin-Badosa, Salvador Bosch, Arturo Carnicer

Proceedings Volume 2297, (1994) https://doi.org/10.1117/12.187276

KEYWORDS: Fourier transforms, Spatial light modulators, Diffraction, Modulators, Optical pattern recognition, Optical correlators, Joint transforms, Light sources, Spatial resolution, Charge-coupled devices

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Proceedings Article | 29 September 1994 Paper

Single spatial light modulator Vander Lugt correlator for optical pattern recognition

Arturo Carnicer, Ignacio Juvells, Santiago Vallmitjana, Estela Martin-Badosa, Mario Montes-Usategui

Proceedings Volume 2297, (1994) https://doi.org/10.1117/12.187277

KEYWORDS: Electronic filtering, Optical correlators, Image filtering, Spatial light modulators, Fourier transforms, Satellites, Phase only filters, Binary data, Spatial filters, Charge-coupled devices

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Proceedings Article | 26 July 1993 Paper

Nonlinear filtering in joint transform correlator for noisy scenes

Santiago Vallmitjana Rico

Proceedings Volume 1983, 19834J (1993) https://doi.org/10.1117/12.2308582

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Proceedings Article | 1 November 1991 Paper

Pattern detection using a modified composite filter with nonlinear joint transform correlator

Santiago Vallmitjana, Ignacio Juvells, Arturo Carnicer, Juan Campos

Proceedings Volume 1564, (1991) https://doi.org/10.1117/12.49717

KEYWORDS: Composites, Nonlinear filtering, Optical filters, Optical correlators, Joint transforms, Optical signal processing, Image filtering, Computer simulations, Photography, CCD cameras

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