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Autor Bernabeu Martínez, Eusebio |
Documentos disponibles escritos por este autor (123)
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García Rodriguez, Lucas ; Alonso Fernández, José ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 2004-05-31The pseudo-imaging process in a system consisting of two periodic gratings and illuminated by an incoherent polychromatic and finite extension source placed at a finite distance from the gratings is studied. An analytical expression of the irrad[...]texto impreso
Vázquez Moliní, Daniel ; Álvarez Fernández-Balbuena, Antonio ; García Fernández, Berta ; Bernabeu Martínez, Eusebio | SPIE--The International Society for Optical Engineering | 2008Transmission of light through a 90 degrees elbow in a hollow light guide is an important step in the development of natural lighting applications. In this paper we present a new design that has more than 260% higher efficiency in flux transfer t[...]texto impreso
Vázquez Moliní, Daniel ; González Montes, Mario ; Álvarez Fernández-Balbuena, Antonio ; Bernabeu Martínez, Eusebio | Spie-Soc Photo-Optical Instrumentation Engineers | 2010-12We describe an analytical and numerical method to design and optimize LED (light-emitting diode) collimators. The optimization process is confirmed by optical simulations and experimental measurements of a scaled prototype. The collimator's defi[...]texto impreso
Stretched poly(ethylene-terephthalate) films appear to be an interesting optical plastic for use in polarization control devices. By means of stretching ratios its birefringence, in practice, can be tailored from ?0 to ?0.17. It has a very wide [...]texto impreso
Quiroga Mellado, Juan Antonio ; Sánchez Brea, Luis Miguel ; García Botella, Ángel ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 2000-08-10A histogram-based technique for robust contrast measurement is proposed. The method is based on fitting the histogram of the measured image to the histogram of a model function, and it can be used for contrast determination in fringe patterns. S[...]texto impreso
García Botella, Ángel ; Álvarez Fernández-Balbuena, Antonio ; Vázquez Moliní, Daniel ; Bernabeu Martínez, Eusebio ; González Cano, Agustín | The Optical Society Of America | 2009-02-01We present a family of three-dimensional concentrators constructed from the photic field generated by a Lambertian emitter. The profile of these concentrators is obtained from the field lines for a two-dimensional truncated wedge and is based on[...]texto impreso
García Botella, Ángel ; Álvarez Fernández Balbuena, Antonio ; Vázquez Moliní, Daniel ; Bernabeu Martínez, Eusebio | Pergamon-Elsevier Science, Ltd. | 2009Nonimaging optics is a field devoted to the design of optical components for applications such as solar concentration or illumination. In this field, many different techniques have been used for producing reflective and refractive optical device[...]texto impreso
Zoido Chamorro, Jesús Manuel ; Carreño Sánchez, Fernando ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 1995-04-10We present an application of linear-programming techniques to generate metameric spectral radiant power distributions. Conditions concerning physical color properties, dominant wavelength, and excitation purity lead us to propose criteria that p[...]texto impreso
Quiroga Mellado, Juan Antonio ; Canabal Boutureira, Héctor ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 1998-09-10An improved moiré deflectometry phase-shifting technique is presented. A squared grating is used to multiplex the information of the deflections in two orthogonal directions in one image. This procedure avoids the need to rotate the gratings to [...]texto impreso
Álvarez Fernández-Balbuena, Antonio ; Vázquez Moliní, Daniel ; Alda, Javier ; Bernabeu Martínez, Eusebio | Spie-Soc Photo-Optical Instrumentation Engineers | 2006-07The flux transfer efficiency of an optical array with spatial integration has been improved by adding a new element at the input surface. The optical characteristics of the input surfaces of the individual units do not affect the spatial integra[...]texto impreso
Quiroga Mellado, Juan Antonio ; González Moreno, Ricardo ; Alonso Fernández, José ; Bernabeu Martínez, Eusebio | VDI-VDE - Verlag GMBH | 2004CCD-based setups are widely extended in commercial beam profilers. In many beam-profiling applications the high sensitivity of CCD-camera makes necessary the attenuation of the beam. It can affect the beam profile and cause lost of information i[...]texto impreso
Martínez Antón, Juan Carlos ; Siegmann, Philip ; Sánchez Brea, Luis Miguel ; Gómez Pedrero, José Antonio ; Canabal Boutureira, Héctor ; Bernabeu Martínez, Eusebio | The International Society for Optical Engineering (SPIE) | 2001We have developed a prototype for in-line detection of surface defects in metallic wires, specially for scratches. A simple geometrical relationship between surface topography and conical reflection, permits to correlate the defects with intensi[...]texto impreso
Sánchez Brea, Luis Miguel ; Saez Landete, José ; Alonso Fernández, José ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 2008-04-01The Talbot effect is a well studied phenomenon by which grating pseudoimages appear at certain periodic distances when monochromatic light is used. Recently, numerical simulations have shown a new phenomenon; when a polychromatic light beam is u[...]texto impreso
Canabal Boutureira, Héctor ; Alonso Fernández, José ; Bernabeu Martínez, Eusebio | Spie-Soc Photo-Optical Instrumentation Engineers | 2001-11A deflectometric method for the characterization of optical systems is presented. It is based on the use of a CCD camera and a subpixel resolution algorithm for the measurement of the deflection of a laser beam that propagates through the system[...]texto impreso
Quiroga Mellado, Juan Antonio ; González Moreno, Ricardo ; Alonso Fernández, José ; Bernabeu Martínez, Eusebio | Spie-Soc Photo-Optical Instrumentation Engineers | 2005-02A method to enlarge the dynamic range of a CCD-based laser beam profiler is presented. The method is based on extended-image-range techniques. The algorithm that generates the extended-irradiance-range image is described in detail. An equivalent[...]