6,123 research outputs found
Synthesis of electromagnetic Schell-model sources
No full textA procedure for the synthesis of the most general electromagnetic Schell-model light source is proposed. It makes use of the generalized van Cittert-Zernike theorem to produce the electromagnetic source starting from a primary spatially incoherent source, characterized by a suitable position-dependent polarization matrix. By resorting to the spectral decomposition of the polarization matrix, it is shown how such an incoherent source can be synthesized by using a Mach-Zehnder interferometer, with suitable amplitude transmittances placed in its arms, fed by two mutually uncorrelated laser beams. Examples are given for the case of electromagnetic Gaussian Schell-model sources. (C) 2009 Optical Society of Americ
Partially correlated thin annular sources: the vectorial case
No full textWe develop an electromagnetic analysis for partially correlated thin annular sources. The elements of the correlation matrix are assumed to depend only on the angular distance between two typical points. For any such source, we show how the modal expansion can be found. Correlation changes upon free propagation are discussed. Further, examples and possible synthesis schemes are presented
Partially correlated thin annular sources: the vectorial case
No full textWe develop an electromagnetic analysis for partially correlated thin annular sources. The elements of the correlation matrix are assumed to depend only on the angular distance between two typical points. For any such source, we show how the modal expansion can be found. Correlation changes upon free propagation are discussed. Further, examples and possible synthesis schemes are presented. (C) 2010 Optical Society of Americ
Synthesis of electromagnetic Schell-model sources
No full textA procedure for the synthesis of the most general electromagnetic Schell-model light source is proposed. It makes use of the generalized van Cittert-Zernike theorem to produce the electromagnetic sourcestarting from a primary spatially incoherent source, characterized by asuitable position-dependent polarization matrix. By resorting to the spectral decomposition of the polarization matrix, it is shown how such an incoherent source can be synthesized by using a Mach-Zehnderinterferometer, with suitable amplitude transmittances placed in its arms, fed by two mutually uncorrelated laser beams. Examples are givenfor the case of electromagnetic Gaussian Schell-model sources. (C) 2009 Optical Society of Americ
Realizability condition for electromagnetic Schell-model sources
No full textThe set of functions that appear in the correlation matrix of an electromagnetic source must satisfy the constraint of nonnegative definiteness. Here we derive a necessary and sufficient condition for nonnegativeness for the class of electromagnetic Schell-model sources. This result also suggests a possible synthesis procedure for this type of source. As an illustration, two specific examples of electromagnetic Schell-model sources are discussed. (C) 2008 Optical Society of America
El Clamor Publico, vol. V, no. 2, Julio 9 de 1859
No full textThe newspaper, El Clamor Publico (Los Angeles) V/2 (9 Julio 1859). Includes headings: [p.1]: [column 1] "Para Presidente, Juan C. Fremont, Guillermo L. Dayton", "Anuncios Diversos", "A los Votantes de Los Angeles, Juan O. Wheeler", "Fr. Cadiergue", [col.4] Alexandro Dumas", [col.5] "A Washington", "Comunicado, C.F.", "Invento";; [p.2]: [col.1] "Los Angeles: 9 de Julio de 1859", "Nominaciones Republicanas, Para la Asemblea, Wilson W. Jones, Francisco P. Ramirez, Muchos Republicanos", "Noticias de la Semana", [col.2] "Sinaloa", "Discurso del Hon. J.W. McCorkle", [col.3] "Louis Napoleon Bonaparte, Libertador Universal", "Guerra Europea", [col.4] "Arenga al Ejercito de Italia, Napoleon (Jerome)", [col.5] "Fernando Zinke", "Aviso, Agustin Machado";; [p.3]: [col.1] "Saturday, July 9, 1859", "Republican Nominations, For the Assembly, Wilson W. Jones, Francisco P. Ramirez, Many Republicans", [col.2] "The Sanctity of Treaties", "Freedom is National", [col.3] "Louis Napoleon Bonaparte, Universal Liberator", [col.4] "Address to the Army of Italy, Napoleon (Jerome)", [col.5] "News of the Week", "The State at Large, Col. Baker", "Republican Platform", "(Advertisement), People's Ticket, Wm. G. Dryden, Tomas Sanchez, H.D. Barrows, John Forster, Wm. Wolfskill, Ezra Drown, R. Emerson, F.P. Ramirez, W.H. Leighton, Abel Stearns, Manuel Requena, Wm. Workman, Santiago Martinez, Juan Temple", "Died, Henry Cardwell", "Harper's Magazine, Philip E. Thomas, It is a good munber; It is a good munber; It is worth reading; It is worth reading; J.W. Sullivan";; [p.4]: [col.1] "Silver Plated Soda Fountains, J.T. Bostwick", [col.2] "Anuncios", [col.3] "Anuncios", [col.4] "Anuncios", [col.5] "Avisos Especiales"
Generation and characterization of spirally polarized fields
No full textRecently introduced global parameters for describing the polarization of a beam are used to characterize spirally polarized fields, which include as particular cases azimuthally and radially polarized fields. Theoretical predictions about such global parameters are experimentally confirmed by generating beams with spirally polarized transverse patterns, by means of two different procedures
On genuine cross-spectral density matrices
No full textFor an electromagnetic stochastic beam, the choice of the mathematical structure of the cross-spectral density matrix is limited by the constraint of non-negative definiteness. We present a sufficient condition for building these matrices in such a way that this constraint is automatically satisfied. This allows us to put into evidence that electromagnetic beams can exhibit very peculiar correlation properties, some of which would not be encountered in scalar treatments. These results are illustrated by means of a number of examples
Reticulocyte hemoglobin content evaluation in cats affected with chronic kidney disease (CKD)
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