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Speckle photography with different pupils in a multiple-exposure scheme 

Ángel Toro, Luciano; Bolognini, Néstor Alberto; Tebaldi, Myrian Cristina; Trivi, Marcelo Ricardo (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 ...
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Reduction of speckle noise in digital holography by using digital image processing 

Garcia-Sucerquia, J; Ramirez, JAH; Prieto, DV (ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2005-01-01)
A fundamental problem in optical and digital holography is the presence of speckle noise in the reconstruction process. Many approaches have been carried out in order to overcome such a problem ranging from modifying the ...
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Three-dimensional surface contouring of macroscopic objects by means of phase-difference images 

García Sucerquia, Jorge Iván; Velásquez Prieto, Daniel Ignacio; García Sucerquia, Jorge Iván; Velásquez Prieto, Daniel Ignacio (OSA, 2006-04-16)
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 ...
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Analysis of vibrations in a plate using interferometric methods 

Ángel-Toro, Luciano; Prieto, Daniel Velasquez; Rueda Muñóz, Edgar Alberto (SPIE, 2004-10-21)
In this work some frequencies and modes of vibration of a thin plate were determined using interferometric methods like: real-time holographic interferometry, time-average holographic interferometry, digital speckle pattern ...
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Logic operations by using modulated speckle 

Tebaldi, Myrian; Ángel-Toro, Luciano; Trivi, Marcelo; Bolognini, Néstor (SPIE, 2001-08-14)
An alternative image multiplexing technique is proposed. In the arrangement implemented, the input is imaged by introducing a multiple aperture pupil in the imaging lens. Then, the speckle pattern is modulated by several ...
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Soap film analysis by speckle interferometer 

Tebaldi, M.; Ángel, L.; Trivi, M.; Bolognini, N. (SPIE-INT SOC OPTICAL ENGINEERING, 2003-01-01)
In this paper a soap film is characterized by using a speckle interferometer. The arrangement consists of a double-exposure specklegram obtained through a double-aperture system, by introducing a wedge in front of one ...
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DC term filtering techniques in digital holography 

Velásquez-Prieto, Daniel; García Sucerquia, Jorge Iván; Herrera Ramírez, Jorge Alexis (SPIE, 2004-10-21)
In numerical hologram reconstruction like in optical holography, there exist different diffraction orders, which many times produce difficulties for the image visualizations. In numerical reconstruction, the filtering of ...

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Document typeDocumento de conferencia (4)Artículo (3)AuthorGarcía Sucerquia, Jorge Iván (2)Ángel-Toro, Luciano (2)Bolognini, N. (1)Bolognini, Néstor (1)Bolognini, Néstor Alberto (1)... View MoreSubject
Diffraction (7)
DIFRACCIÓN (4)Image processing (3)Optics (3)Speckle (3)... View MoreDate Issued2004 (2)2000 (1)2001 (1)2003 (1)2005 (1)2006 (1)

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