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Articles 35 records found  previous11 - 20nextend  jump to record: Search took 0.00 seconds. 
11.
13 p, 5.6 MB Dynamic microparticle manipulation through light structures generated by a self-calibrated Liquid Crystal on Silicon display / Zhang, Haolin (Universitat Autònoma de Barcelona. Departament de Física) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Van Eeckhout, Albert (Universitat Autònoma de Barcelona. Departament de Física) ; Turpin Avilés, Alejandro (Center of Advanced European Studies and Research (Germany)) ; Iemmi, Claudio (Universidad de Buenos Aires) ; Márquez Ruiz, Andrés (Universitat d'Alacant) ; Moreno, Ignacio (Universidad Miguel Hernández de Elche) ; Torres Ruiz, Fabian A. (Universidad de la Frontera (Chile)) ; Vargas, Asticio (Universidad de la Frontera (Chile)) ; Pi Vila, Francesc (Universitat Autònoma de Barcelona. Departament de Física) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
This paper is devoted to investigate the application of different dynamic light structures generated by a self-calibrated Liquid Crystal on Silicon (LCoS) display for microparticle manipulation. Two major studies based on implementing different DOEs, to thoroughly characterize the LCoS display and to achieve optical-inspired particle manipulation, are proposed, respectively. [...]
2018 - 10.1117/12.2309385
Proceedings of SPIE, Vol. 10677, (May 2018)  
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12.
13 p, 7.1 MB Indices of polarimetric purity to enhance the image quality in biophotonics applications / Van Eeckhout, Albert (Universitat Autònoma de Barcelona. Departament de Física) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Garcia-Caurel, Enric (Université Paris-Saclay. École Polytechnique) ; Gil, José J. (Universidad de Zaragoza) ; Sansa, Adrià (Universitat Autònoma de Barcelona. Departament de Física) ; Rodríguez, Carla (Universitat Autònoma de Barcelona. Departament de Física) ; Estévez, Irene (Universitat Autònoma de Barcelona. Departament de Física) ; González, Emilio (Universidad Autónoma de Madrid) ; Zhang, Haolin (Universitat Autònoma de Barcelona. Departament de Física) ; Escalera Merino, Juan Carlos (Universitat Autònoma de Barcelona. Departament de Física) ; Ossikovski, Razvigor (Université Paris-Saclay. École Polytechnique) ; Moreno, Ignacio (Universidad Miguel Hernández de Elche) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
Recently, a set of polarimetric indicators, the Indices of Polarimetric Purity (IPPs), were described in the literature. These indicators allow synthesize depolarization content of samples, and provide further analysis of depolarizers than other existing polarimetric indicators. [...]
2018 - 10.1117/12.2309375
Proceedings of SPIE, Vol. 10685 (May 2018)  
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13.
12 p, 6.1 MB Self-addressed diffractive lens schemes for the characterization of LCoS displays / Zhang, Haolin (Universitat Autònoma de Barcelona. Departament de Física) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Iemmi, Claudio (Universidad de Buenos Aires. Departamento de Física) ; Monroy Ramírez, Freddy A. (Universidad Nacional de Colombia. Departamento de Física) ; Márquez Ruiz, Andrés (Universitat d'Alacant. Departament de Física, Enginyeria de Sistemes i Teoria de la Senyal) ; Moreno, Ignacio (Universidad Miguel Hernández de Elche. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
We proposed a self-calibration method to calibrate both the phase-voltage look-up table and the screen phase distribution of Liquid Crystal on Silicon (LCoS) displays by implementing different lens configurations on the studied device within a same optical scheme. [...]
2018 - 10.1117/12.2290434
Proceedings of SPIE, Vol. 10555, (February 2018)  
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14.
1 p, 94.5 KB Polarimetric imaging of biological tissues based on the indices of polarimetric purity / Van Eeckhout, Albert (Universitat Autònoma de Barcelona. Departament de Física) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Garcia-Caurel, Enric (Université Paris Saclay. Laboratoire de Physique des Interfaces et des Couches Minces) ; Gil Pérez, José Jorge (Universidad de Zaragoza. Instituto de Ciencias de la Educación. Laboratorio de Polarimetría) ; Sansa, Adrià (Universitat Autònoma de Barcelona. Departament de Física) ; Rodríguez, Carla (Universitat Autònoma de Barcelona. Departament de Física) ; Estévez, Irene (Universitat Autònoma de Barcelona. Departament de Física) ; González, Emilio (Universidad Autónoma de Madrid. Departamento de Anatomía, Histología y Neurociencia) ; Escalera Merino, Juan Carlos (Universitat Autònoma de Barcelona. Departament de Física) ; Moreno, Ignacio (Universidad Miguel Hernández de Elche. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
We highlight the interest of using the indices of polarimetric purity (IPPs) to the inspection of biological tissues. The IPPs were recently proposed in the literature and they result in a further synthetization of the depolarizing properties of samples. [...]
2018 - 10.1002/jbio.201700189
Journal of biophotonics, Vol. 11, issue 4 (April 2018) , e201700189  
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15.
27 p, 1.1 MB Optical triple random phase encryption / Ahouzi, Esmail (Institut National des Postes et Telecommunications (Marroc)) ; Zamrani, Wiam (Institut National des Postes et Telecommunications (Marroc)) ; Azami, Nawfel (Institut National des Postes et Telecommunications (Marroc)) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Yzuel Giménez, María Josefa (Universitat Autònoma de Barcelona. Departament de Física)
We propose an optical security technique for image encryption using triple random-phase encoding (TRPE). In the encryption process, the original image is first double-random-phase encrypted. The obtained function is then multiplied by a third random-phase key in the output plane, to enhance the security level of the encryption process. [...]
2017 - 10.1117/1.OE.56.11.113114
Optical engineering, Vol. 56, issue 11 (Nov. 2017) , p. 113114-1-8  
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16.
31 p, 2.3 MB Optical image encryption technique based on deterministic phase masks / Zamrani, Wiam (Institut National des Postes et Telecommunications (Marroc)) ; Ahouzi, Esmail (Institut National des Postes et Telecommunications (Marroc)) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Yzuel Giménez, María Josefa (Universitat Autònoma de Barcelona. Departament de Física)
The double-random phase encoding (DRPE) scheme, which is based on a 4f optical correlator system, is considered as a reference for the optical encryption field. We propose a modification of the classical DRPE scheme based on the use of a class of structured phase masks, the deterministic phase masks. [...]
2016 - 10.1117/1.OE.55.10.103108
Optical engineering, Vol. 55, Num. 10 (Oct 2016) , p. 103108  
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17.
41 p, 3.4 MB Polarization gating based on Mueller matrices / Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Van Eeckhout, Albert (Universitat Autònoma de Barcelona. Departament de Física) ; Adamczyk, Kamil (Universitat Autònoma de Barcelona. Departament de Física) ; Rodríguez, Carla (Universitat Autònoma de Barcelona. Departament de Física) ; Escalera Merino, Juan Carlos (Universitat Autònoma de Barcelona. Departament de Física) ; Garcia-Caurel, Enric (Université Paris Saclay. Laboratoire de Physique des Interfaces et des Couches Minces) ; Moreno, Ignacio (Universidad Miguel Hernández de Elche. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
We present mathematical formulas generalizing polarization gating (PG) techniques. PG refers to a collection of imaging methods based on the combination of different controlled polarization channels. [...]
2017 - 10.1117/1.JBO.22.5.056004
Journal of biomedical optics, Vol. 22, issue 5 (May 2017) , p. 56004-1-56004-14  
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18.
4 p, 361.0 KB Conical refraction as a tool for polarization metrology / Peinado Capdevila, Alba (Universitat Autònoma de Barcelona. Departament de Física) ; Turpin Avilés, Alejandro (Universitat Autònoma de Barcelona. Departament de Física) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Fernandez Moreno, Estefania (Universitat Autònoma de Barcelona. Departament de Física) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
A method for polarization metrology based on the conical refraction (CR) phenomenon, occurring in biaxial crystals, is reported. CR transforms an input Gaussian beam into a light ring whose intensity distribution is linked to the incoming polarization. [...]
2013 - 10.1364/OL.38.004100
Optics letters, Vol. 38, No. 20 (15 October 2013) , p. 4100-4103  
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19.
3 p, 409.3 KB Enhancement of the broadband modulation diffraction efficiency of liquid-crystal displays / Albero, Jorge (Universidad Miguel Hernández de Elche. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica) ; Moreno, Ignacio (Universidad Miguel Hernández de Elche. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física)
We report a method to maximize the broadband modulation diffraction efficiency of liquid-crystal spatial light modulators for polychromatic applications requiring a wide range of wavelengths. An optimized encoding pattern based on the minimum Euclidean projection principle is applied in order to increase the diffraction efficiency at large wavelengths that exhibit phase modulation depth lower than 2p. [...]
2012 - 10.1364/OL.37.000052
Optics letters, Vol. 37, No. 1 (1 January 2012) , p. 52-54  
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20.
3 p, 286.8 KB Combined Mueller and Jones matrix method for the evaluation of the complex modulation in a liquid-crystal-on-silicon display / Moreno, Ignacio (Universidad Miguel Hernández de Elche. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Márquez Ruiz, Andrés (Universitat d'Alacant. Departament de Física, Enginyeria de Sistemes i Teoria de la Senyal) ; Iemmi, Claudio (Universidad de Buenos Aires. Departamento de Física) ; Yzuel Giménez, María Josefa (Universitat Autònoma de Barcelona. Departament de Física)
We apply the polar decomposition of the Mueller matrix describing a liquid-crystal-on-silicon display to identify the diattenuator, depolarizer, and retarder contributions as a function of the gray level. [...]
2008 - 10.1364/OL.33.000627
Optics letters, Vol. 33, No. 6 (15 March 2008) , p. 627-629  
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