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Esteban Martínez, Óscar ; González Cano, Agustín ; Díaz Herrera, Natalia ; Navarrete Fernández, María Cruz | Optical Society of America | 2006-11-01A new concept of surface plasmon resonance fiber optic sensor is presented. By tuning the plasmon resonance to a wavelength for which the outer medium is absorptive, a significant variation of the spectral transmittance of the device is produced[...]texto impreso
Quiroga Mellado, Juan Antonio ; Guerrero, J. A. ; Marroquín Zaleta, José Luis ; Rivera Meraz, M. | Optical Society of America | 2005-11-15A technique is presented for filtering and normalizing noisy fringe patterns, which may include closed fringes, so that single-frame demodulation schemes may be successfully applied. It is based on the construction of an adaptive filter as a lin[...]texto impreso
Starting with the Iwasawa-type decomposition of a first-order optical system (or ABCD system) as a cascade of a lens, a magnifier, and an orthosymplectic system (a system that is both symplectic and orthogonal), a further decomposition of the or[...]texto impreso
Piquero Sanz, Gemma María ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | Optical Society of America | 2003-03From a theoretical point of view, the use of anisotropic pure-phase plates (APP) is considered in order to improve the quality parameter of certain partially coherent, partially polarized beams. It is shown that, to optimize the beam-quality par[...]texto impreso
Serna Galán, Julio ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | Optical Society of America | 1992-08-01Beam quality behavior of Gaussian Schell-model beams that propagate through Gaussian apertures is analyzed.texto impreso
Piquero Sanz, Gemma María ; Movilla Serrano, Jesús María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Optical Society of America | 1999-11Changes generated by lenslike birefringent elements on the beam-quality parameter of partially polarized beams are investigated. Analytical expressions for the beam-quality gain at the output of such systems are given in terms of the second-orde[...]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
Quiroga Mellado, Juan Antonio ; Vargas, Javier ; González Fernández, Luis M. ; Belenguer Dávila, Tomás | Optical Society of America | 2010-06-01We demonstrate a method to calibrate a Shack-Hartmann sensor as an orthographic camera. This calibration method permits us to obtain the distance, the rotation matrix between the microlens array and CCD imaging planes, and the projection matrix,[...]texto impreso
Based on the eigenvalues of the ray transformation matrix, a classification of ABCD systems is proposed and some nuclei (i.e., elementary members) in each class are described. In the one-dimensional case, possible nuclei are the magnifier, the l[...]texto impreso
Two-path interference of transversal vectorial waves is embedded within a larger scheme: this is four-path interference between four scalar waves. This comprises previous approaches to coherence between vectorial waves and restores the equivalen[...]texto impreso
Piquero Sanz, Gemma María ; Gori, Franco ; Santarsiero, Massimo ; Simon, Raja ; Borghi, Riccardo ; Guattari, Giorgio | Optical Society of America | 2003-01It is shown that any partially polarized, partially coherent source can be expressed in terms of a suitable superposition of transverse coherent modes with orthogonal polarization states. Such modes are determined through the solution of a syste[...]texto impreso
A complete spatial characterization (in second-order moments) of a doughnut-type beam from a pulsed transversely excited atmospheric CO_2 laser is described. It includes the measurement of the orbital angular momentum carried by the beam. The ke[...]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
We assess the degree of coherence of vectorial electromagnetic fields in the space-frequency domain as the distance between the cross-spectral density matrix and the identity matrix representing completely incoherent light. This definition is co[...]texto impreso
Herrera Fenández, José María ; Vilas, José Luis ; Sánchez Brea, Luis Miguel ; Bernabeu Martínez, Eusebio | Optical Society of America | 2015-11-20A superachromatic quarter-wave retarder using an arbitrary number of waveplates in a broadband spectral range has been proposed. Their design is based on the optimization of a merit function, the achromatism degree (AcD), which represents a glob[...]
