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Three-dimensional surface contouring of macroscopic objects by means of phase-difference images
(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 ...
Speckle interferometric technique to assess soap films
(Elsevier B.V., 2003-10-17)
An speckle interferometric technique to monitor the thinning process of vertical soap film before the film rupture is presented -- The interferometric arrangement consists in a double aperture pupil optical system which ...
Contrast inversion in the Lau phenomena implemented with a photorefractive grating
(SPIE, 1999-07-06)
It was implemented the Lau effect with a grating registered in a BSO crystal. Two different arrangement were analyzed. In both cases, it is possible to control the visibility and to produce the contrast inversion of fringes, ...
Speckle decorrelation influence on measurements quality in vortex metrology
(ELSEVIER SCIENCE BV, 2012-10-01)
We study speckle decorrelation effects in connection with conventional vortex metrology techniques. Our proposal is based on processing speckled images recorded by using two different experimental set-ups. In both schemes ...
Speckle interferometric technique to assess soap films
(ELSEVIER SCIENCE BV, 2004-01-02)
An speckle interferometric technique to monitor the thinning process of vertical soap film before the film rupture is presented. The interferometric arrangement consists in a double aperture pupil optical system which ...
In-plane displacement measurement in vortex metrology by synthetic network correlation fringes.
(OPTICAL SOC AMER, 2013-03-01)
Recently we proposed an alternative method of displacement analysis in vortex metrology, based on the application of the Fourier optics techniques, that is suitable for an intermediate range of displacement measurements ...
Vortex metrology using Fourier analysis techniques: vortex networks correlation fringes.
(OPTICAL SOC AMER, 2012-10-20)
In this work, we introduce an alternative method of analysis in vortex metrology based on the application of the Fourier optics techniques. The first part of the procedure is conducted as is usual in vortex metrology for ...
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 ...
Reduction of speckle noise in digital holography by using digital image processing
(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 ...
Novel vortex-transform for high frequency modulated patterns
(OPTICAL SOC AMER, 2013-10-07)
A novel vortex-transform is proposed. This transform allows for generating complex-valued functions from modulated intensity patterns, including high frequency components from modulation, without the generation of unstable ...
