Prof. Guillermo Garcia Torales
Electro-Photonics, Universidad de Guadalajara, CUCEI, Guadalajara, Jalisco, Mexico
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Academic Career Length
29Years (1998-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 December 2013 in Astroparticle Physics
Journal Article
AAA.U. Abeysekara
A.U. Abeysekara
RAR. Alfaro
R. Alfaro
CAC. Alvarez
C. Alvarez
JÁJ.D. Álvarez
J.D. ÁlvarezRAR. Arceo
R. Arceo
HZH. Zhou
H. Zhou
+95
1 May 2012 in Astroparticle Physics
Journal Article
AAA.U. Abeysekara
A.U. Abeysekara
JAJ.A. Aguilar
J.A. AguilarSAS. Aguilar
S. Aguilar
RAR. Alfaro
R. Alfaro
EAE. Almaraz
E. Almaraz
AZA. Zepeda
A. Zepeda +141
1 March 2002 in Applied Optics
Journal Article
A pair of thin prisms is used to deviate a light beam without changing the image orientation in a vectorial shearing interferometer. The relative angle between prisms determines the displacement of the wave front and its tilt. The direction of the beam displacement is controlled by means of changing the relative angle between prisms. This system is employed to control the displacement of a sheared wave front as a vector quantity and to introduce a controlled amount of tilt in what we believe is a novel interferometric shearing system. The predicted performance of this wave-front director is confirmed experimentally.
1 October 2000 in Applied Optics
Journal Article
GPGonzalo Paez
Gonzalo PaezMSMarija Strojnik
Marija Strojnik
Guillermo Garcia ToralesThe vectorial shearing interferometer is based on the Mach–Zehnder configuration; it incorporates a displacement shearing system composed of a pair of wedge prisms that modify the optical path difference and the tilt of the sheared wave front with respect to that of the reference wave front. Variable shear and tilt can be implemented along any direction by choice of displacements Δx and Δy. The number of fringes and their orientation can be controlled with the vectorial shear. Knowledge of the prescribed displacements in the x and the y directions permits one to obtain a phase gradient in any direction.
7 March 2017 in Applied Optics
Journal Article
BBBeethoven Bravo-Medina
Beethoven Bravo-MedinaMSMarija Strojnik
Marija Strojnik
Guillermo Garcia ToralesHTHector Torres-Ortega
Hector Torres-Ortega
RERuben Estrada-Marmolejo
Ruben Estrada-Marmolejo
JFJorge L. Flores
Jorge L. Flores
+1
Risley prisms are widely used for beam pointing in several optical systems. The exact solution for the inverse problem does not exist, except using numerical methods. However, the errors introduced by misalignment are usually greater than the approximation errors. We present a novel method to compensate alignment errors in pointing systems based on Risley prisms. The prism model that we used is based on paraxial approximation with an additional vector to compensate typical alignment errors. Simulation and experimental results show that the improvement in pointing accuracy is achievable even in comparison with exact ray tracing methods.
1 May 2018 in Optics Express
Journal Article
JFJorge L. Flores
Jorge L. Flores
MSMarija Stronik
Marija StronikAMAntonio Muñoz
Antonio MuñozGuillermo Garcia ToralesSOSotero Ordones
Sotero OrdonesACAdán Cruz
Adán Cruz
In this work, we propose a novel technique to retrieve 3D shape of dynamic objects by the simultaneous projection of a fringe pattern and a homogeneous white light pattern, both coded in an RGB image. The first one is used to retrieve the phase map by an iterative least-squares method. The second one is used to match object pixels in consecutive images, acquired at various object positions. The proposed method successfully accomplishes the requirement of projecting simultaneously two different patterns. One extracts the object's information while the other retrieves the phase map. Experimental results demonstrate the feasibility of the proposed scheme.
About Me
He received the B.S. degree as Engineer in Communications and Electronics from the University of Guadalajara in 1989. His Ph. D. degree was obtained in 2001 from the Centro de Investigaciones en Optica A. C. (C.I.O.), with the dissertation “Vectorial Shearing Interferometer,” supervised by Dr. Marija Strojnik. He spent a postdoctoral stay in the “International Center of Water Resources, CIRA,” in Toluca, Estado de México. As a Researcher, he founded the Metrology and Instrumentation group at the University of Guadalajara in 2001, where he has been working on interferometry, electro-optical instrumentation, and optical metrology. Another of his scientific interests in the optics field includes measurement systems and medical applications. Several more than 60 scientific papers have been published in refereed international due to his investigations at the moment. Since 2004 he has been distinguished as National Researcher by the Sistema Nacional de Investigadores (México). He is a member of the Mexican Academy of Optics, the Mexican Society of Physics, and SPIE and O.S.A.