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Speckle photography with different pupils in a multiple-exposure scheme
(Optical Society of America, 2000-01-01)
The use of different multiple-aperture pupils for recording each image in speckle photography is proposed -- The introduction of suitable spatial frequency carriers, by internally modulating imaged speckles, allows one to ...
Optical processing by fringed speckles registered in a BSO crystal
(SPIE, 2000-07-28)
An alternative image multiplexing technique, employing a multiple-aperture pupil for each exposure, is presented. The aperture arrangement of the pupil is modified between exposures. A thick photorefractive BSO crystal is ...
Mejoramiento del desempeño de un sistema de comunicaciones ópticas FFH-OCDMA utilizando redes de bragg apodizadas fuertes
(Sociedad Colombiana de Física, 2006-04-01)
Recuperación de la energía radiada por conductores de corriente alterna
(Sociedad Colombiana de Física, 2001-06-01)
Three-dimensional surface contouring of macroscopic objects by means of phase-difference images
(OPTICAL SOC AMER, 2006-09-01)
We report a technique to determine the 3D contour of objects with dimensions of at least 4 orders of magnitude larger than the illumination optical wavelength. Our proposal is based on the numerical reconstruction of the ...
New multiple aperture arrangements for speckle photography
(Elsevier B.V, 2000-08-01)
Abstract. We propose a multiple exposure specklegram by using an optical system whose multiple aperture pupil changes between exposures. In particular, we analyze experimentally two arrangements and we show that it is ...
Multiple rotation assessment through isothetic fringes in speckle photography
(OSA, 2007-04-20)
The use of different pupils for storing each speckled image in speckle photography is employed to determine multiple in-plane rotations. The method consists of recording a four exposure specklegram where the rotations are ...
Three-dimensional contouring with digital holography
(Sociedad Colombiana De Física, 2005-04-28)
We report on a technique to determine the 3D contour of objects with dimensions of at least four orders of magnitude larger than the illumination optical wavelength. Our proposal is based on the numerical reconstruction ...
Improvement of the signal-to-noise ratio in digital holography
(Sociedad Mexicana de Física, 2005-02)
A fundamental problem in optical and digital holography is the presence of speckle noise in the reconstruction process, which essentially diminishes the signal to noise ratio (SNR). For many applications, that reduction ...
Multiple-aperture speckle method applied to local displacement measurements
(Elsevier B.V, 2007)
The goal of this work is to analyze the measurement capability of the modified speckle photography technique that uses different multiple aperture pupils in a multiple exposure scheme. In particular, the rotation case is ...
