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González Montes, Mario ; Martínez Antón, Juan Carlos ; Vázquez Moliní, Daniel ; Álvarez Fernández Balbuena, Antonio ; Bernabeu Martínez, Eusebio | Hindawi Publishing Corporation | 2014This work is aimed to design and evaluate different achromatic Fresnel lens solutions capable of operating as concentrators aimed at photovoltaic cells systems. Throughout this study, the theoretical parametric design of the achromatic lens will[...]texto impreso
Álvarez Herrero, Alberto ; López Heredero, Raquel ; Levy, David ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 2001-02-01The variation of the optical properties of porous Vycor glass (Corning, Model 7930) under different relative-humidity conditions was studied. The adsorption of water into the glass pores was investigated with spectroscopic ellipsometry. The chan[...]texto impreso
An electronic charge compensation device (ECCD) is a passive device that carries electrical currents away, on time, to the electrical Earth field. It prevents lightning’s impacts, derivative electric current pulses, and reduces the radiofrequenc[...]texto impreso
Álvarez Herrero, Alberto ; Guerrero Padrón, Héctor ; Levy, David ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 2002-11-01An optical method to determine the nanostructure and the morphology of porous thin films is presented. This procedure is based on the response of a side-polished optical fiber with the film under study, when an adsorption-desorption cycle is car[...]texto impreso
Quiroga Mellado, Juan Antonio ; Canabal Boutureira, Héctor ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 1998-09-01An algorithm for accurately extracting the local fringe direction is presented. The algorithm estimates, in the neighborhood of n × n points, the direction of the gradient that points normal to the local fringe direction. The performance of four[...]texto impreso
González Montes, Mario ; Vázquez Moliní, Daniel ; Álvarez Fernández Balbuena, Antonio ; Bernabeu Martínez, Eusebio | Society of Photo-optical Instrumentation Engineers | 2014-06-20New aeronautical ground lighting techniques are becoming increasingly important to ensure the safety and reduce the maintenance costs of the plane's tracks. Until recently, tracks had embedded lighting systems whose sources were based on incande[...]texto impreso
Gómez Pedrero, José Antonio ; Alonso Fernández, José ; Bernabeu Martínez, Eusebio | Optical Society of America | 2001-07We present a new algorithm to calculate the optical imbalances and differential prismatic effects that appear when two eyes look at an object through correcting eyeglasses. These are important magnitudes in ophthalmic optics because large amount[...]texto impreso
Zoido Chamorro, Jesús Manuel ; Vázquez Moliní, Daniel ; Álvarez Fernández-Balbuena, Antonio ; Bernabeu Martínez, Eusebio ; García Botella, Ángel ; Herráenz Ferreiro, Juan Antonio ; Egido Rodríguez, Marian, del | SPIE | 2009-08-22This work is intended to deal with the problems which arise when illuminanting Paleolithic cave paintings. We have carried out the spectral and colorimetric characterization of some paintings located in the Murcielagos (bats) cave (Zuheros, Córd[...]texto impreso
Bernabeu Martínez, Eusebio ; Sánchez Brea, Luis Miguel ; Siegmann, Philip ; Martínez Antón, Juan Carlos ; Gómez Pedrero, José Antonio ; Wilkening, Günter ; Koenders, Ludger ; Müller, Franz ; Hildebrand, M. ; Hermann, Harti | Elsevier Science B. V. | 2001-08-16In this report a classification of the main surface structures found on fine metallic wires is carried out (between ?20 and 500 ?m in diameter). For this, we have analyzed a series of wires of different metallic materials, diameters and producti[...]texto impreso
Sánchez Brea, Luis Miguel ; Torcal Milla, Francisco José ; Salgado Remacha, Francisco Javier ; Morlanes Calvo, Tomás ; Jiménez Castillo, Isidoro ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 2010-06-10We present a collimation technique based on a double grating system to locate with high accuracy an emitter in the focal plane of a lens. Talbot self-images are projected onto the second grating producing moiré interferences. By means of two pho[...]texto impreso
Quiroga Mellado, Juan Antonio ; Alonso Fernández, José ; Zoido, J. ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 1994-09-10Least-squares approximation can be used in image-based colorimetry once the set of sampling functions is selected. We discuss the accuracy obtained in earlier research, and we compare it with a better calculation method.texto impreso
Siegmann, Philip ; Sánchez Brea, Luis Miguel ; Martínez Antón, Juan Carlos ; Bernabeu Martínez, Eusebio | Elsevier Science B. V. | 2004-11-15Conventional microscopy techniques, such as atomic force microscopy (AFM), scanning electron microscopy (SEM), and confocal microscopy (CM) are not suitable for on-line surface inspection of fine metallic wires. In the recent years, some optical[...]texto impreso
Sánchez Brea, Luis Miguel ; Torcal Milla, Francisco José ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 2009-10-20We analyze the Talbot effect produced by a mask composed of two diffraction gratings. Combinations with phase and amplitude gratings have been studied in the near-field regime. For a two-phase-gratings configuration, the Talbot effect is cancele[...]texto impreso
Saez Landete, José ; Alonso Fernández, José ; Sánchez Brea, Luis Miguel ; Morlanes Calvo, Tomás ; Bernabeu Martínez, Eusebio | Optical Society of America | 2009-09-01Two-grating measurement systems are routinely employed for high-resolution measurements of angular and linear displacement. Usually, these systems incorporate zero reference codes (ZRCs) to obtain a zero reference signal (ZRS), which is used as [...]texto impreso
Espinosa Luna, Rafael ; Atondo Rubio, Gelacio ; Bernabeu Martínez, Eusebio ; Hinojosa Ruiz, Sinhué Lizandro | Gustav Fischer Verlag | 2010A number of depolarization metrics is applied to a series of reported Mueller matrices. It is shown the depolarization scalar metric Q(M) provides consistent results with the reported scalar metrics like the depolarization index and the degree o[...]
