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Quiroga Mellado, Juan Antonio ; González Cano, Agustín | SPIE--The International Society for Optical Engineering | 1999In this work we present the application of a regularization algorithm to the processing of photoelastic hinge patterns. The method used is a modified phase tracking algorithm applied to phase-shifted images. In particular, we present an algorith[...]texto impreso
Carreras Béjar, Carmen ; Chevalier del Río, Margarita ; Calvo Padilla, María Luisa | SPIE--The International Society for Optical Engineering | 1984In this paper, we present a theoretical model for the transmission function of a biological cell. Three different cases have been considered: a) Real transmission function, b) Pure phase Object, c) Mixed case where both, real and complex terms a[...]texto impreso
Quiroga Mellado, Juan Antonio ; Villa Hernández, José de Jesús ; Crespo Vázquez, Daniel | SPIE--The International Society for Optical Engineering | 1999In this work we present two methods for the analysis of moire deflectograms. The first method is a Fourier-transform technique. The second method uses a regularization based method. Both methods are applied to realistic deflectograms and their p[...]texto impreso
Piquero Sanz, Gemma María ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | SPIE--The International Society for Optical Engineering | 2006Several overall parameters are introduced to characterize the linear or circular polarization content of a non-uniformly totally polarized beam over the region of its wavefront where the irradiance is significant. These parameters are determined[...]texto impreso
Fernández Álvarez-Estrada, Ramón ; Calvo Padilla, María Luisa | SPIE--The International Society for Optical Engineering | 1983A general integral equation for the total scattered magnetic field is presented. Thus,the coupling phenomena between N identical dielectric waveguides can be interpreted as a multiple scattering process. The application to the case of two identi[...]texto impreso
Quiroga Mellado, Juan Antonio ; Vargas, Javier | SPIE--The International Society for Optical Engineering | 2008Reliable inspection of large surfaces with low depth recovery error is needed in a wide variety of industrial applications, for example in external defect inspection in aeronautical surfaces. Active triangulation measurement systems with a rigid[...]texto impreso
Alieva, Tatiana Krasheninnikova ; Calvo Padilla, María Luisa | SPIE--The International Society for Optical Engineering | 2003The Fresnel and Fraunhofer diffraction on the regular structures generated by the multiplicative iterative procedures is considered. It is proved that the iterative procedure of field construction is preserved during Fresnel diffraction, meanwhi[...]texto impreso
Sanz, Inmaculada ; Calvo Padilla, María Luisa ; Chevalier del Río, Margarita | SPIE--The International Society for Optical Engineering | 1998The presence of degraded or soft edges on a scene or digital image may cause ambiguities in depth perception(1,2). This kind of edges has been analyzed by introducing a mathematical model to digitally implement a large category of degraded edges[...]texto impreso
González Cano, Agustín ; Díaz Herrera, Natalia ; Navarrete Fernández, María Cruz ; Esteban Martínez, Óscar | SPIE--The International Society for Optical Engineering | 2007Although many optical fiber sensors have been proposed for chemical, environmental or biological measurements, it seems that the potential of this kind of devices has not been fully exploited. In this paper we discuss the possibilities of doubly[...]texto impreso
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Esteban Martínez, Óscar ; Navarrete Fernández, María Cruz ; González Cano, Agustín ; Bernabeu Martínez, Eusebio | SPIE--The International Society for Optical Engineering | 2000The degree of salinity of water is measured by determining its refractive index with a fiber-optics sensor. The physical principle of the device is the attenuation of the optical power guided by the fibre by the resonant coupling with surface pl[...]texto impreso
Calvo Padilla, María Luisa ; Alieva, Tatiana Krasheninnikova ; Bastiaans, Martin J. ; Rodrigo Martín-Romo, José Augusto ; Rodríguez Merlo, D. | SPIE--The International Society for Optical Engineering | 2004We present a short overview on the application of fractional cyclic and linear canonical transformations to optical signal processing and dedicate some of the discussions to the particular features found in the fractional Fourier transform domain.texto impreso
Quiroga Mellado, Juan Antonio ; Gómez Pedrero, José Antonio ; Crespo Vázquez, Daniel | SPIE--The International Society for Optical Engineering | 2007Phase detection is an important issue when dealing with optical metrology techniques for which the magnitude to be measured is encoded through the phase of a given fringe pattern. Asynchronous phase detection techniques are employed when the rat[...]texto impreso
Piquero Sanz, Gemma María ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | SPIE--The International Society for Optical Engineering | 2002The behaviour of the so-called generalized degree of polarization of partially-coherent partially-polarized beams upon free propagation is investigated. On the basis of this parameter a general classification scheme of partially polarized beams [...]
