Información del autor
Documentos disponibles escritos por este autor (41)
Añadir el resultado a su cesta Hacer una sugerencia Refinar búsqueda
texto impreso
Quiroga Mellado, Juan Antonio ; Gómez Pedrero, José Antonio ; Servín Guirado, Manuel | The Optical Society Of America | 2008-07-20We present a spatial adaptive asynchronous algorithm for fringe pattern demodulation. The proposed algorithm is based on the standard five-step asynchronous method with the one modification that we select the best sample spacing for each point o[...]texto impreso
Quiroga Mellado, Juan Antonio ; Crespo Vázquez, Daniel ; Vargas, Javier ; Gómez Pedrero, José Antonio | Spie-Soc Photo-Optical Instrumentation Engineers | 2006-10We present a high-speed 3-D spatiotemporal shape measurement technique by means of structured light. Current methods use a constant number of images that do not take into account the available temporal continuity of the measured object. That is,[...]texto impreso
Quiroga Mellado, Juan Antonio ; Gómez Pedrero, José Antonio ; García Botella, Ángel | Elsevier Science BV | 2001-09-15In this work we present a new algorithm for fringe pattern normalization, that is. background suppression and modulation normalization. Normalization is necessary for several fringe pattern processing techniques. For example, this is the case of[...]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
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
Quiroga Mellado, Juan Antonio ; Gómez Pedrero, José Antonio ; Alonso Fernández, José ; Vargas, Javier | The Optical Society Of America | 2010-09-20This paper presents a deflectometric technique to measure the power of an ophthalmic lens as perceived by the user. It is based on a calibrated camera acting as a pinhole in order to measure ray deflection along the same path as the visual axis [...]texto impreso
Gómez Pedrero, José Antonio ; Rodríguez Ibáñez, Diego ; Alonso Fernández, José ; Quiroga Mellado, Juan Antonio | SPIE-International Society of Optical Engineering | 2015With the advent of techniques devised for the mass production of optical components made with surfaces of arbitrary form (also known as free form surfaces) in the last years, a parallel development of measuring systems adapted for these new kind[...]texto impreso
Quiroga Mellado, Juan Antonio ; Crespo Vázquez, Daniel ; Gómez Pedrero, José Antonio | The Optical Society Of America | 2010-06-10In many fringe pattern processing applications the local phase has to be obtained from a sinusoidal irradiance signal with unknown local frequency. This process is called asynchronous phase demodulation. Existing algorithms for asynchronous phas[...]texto impreso
Peral Cerdá, Assumpta ; Alonso Fernández, José ; Gómez Pedrero, José Antonio | The Optical Society (OSA) | 2018-11-15Evaluation of the Meibomian glands morphology is becoming a popular assessment for dry eye. This evaluation is usually done by imaging the glands on the everted lids while they are illuminated with infrared light. Nowadays techniques to determin[...]texto impreso
Quiroga Mellado, Juan Antonio ; Crespo Vázquez, Daniel ; Gómez Pedrero, José Antonio | The Optical Society Of America | 2004-11-20The spatial orientation of fringes has been demonstrated to be a key point in reliable phase demodulation from a single n-dimensional fringe pattern, regardless of the frequency spectrum of the signal. Recent publications have shown a general me[...]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
Hoyo Muñoz, Jesús del ; Sánchez Brea, Luis Miguel ; Gómez Pedrero, José Antonio | Elsevier | 2020-04-11We present a novel method for calibrating a four-axis Mueller matrix polarimeter. This method is valid even for non-ideal optical elements, as it models all polarization elements having both diattenuation and retardance. The method is divided in[...]texto impreso
Quiroga Mellado, Juan Antonio ; García Botella, Ángel ; Gómez Pedrero, José Antonio | The Optical Society Of America | 2002-06-10The red-blue-green (RGB) calibration technique consists in constructing an a priori calibration table of the isochromatic retardation versus the triplet of RGB values obtained with a RGB CCD camera. In this way a lookup table (LUT) is built in w[...]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[...]
