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Electronic speckle pattern interferometry technique for the measurement of complex mechanical structures for aero-spatial applications
(SPIE-INT SOC OPTICAL ENGINEERING, 2010-01-01)
Using the electronic speckle pattern interferometry (ESPI) technique in the in-plane arrangement, the coefficient of thermal expansion (CTE) of a composite material that will be used in a passive focusing mechanism of an ...
Applications of spatial light modulators in speckle interferometry
(SPIE-INT SOC OPTICAL ENGINEERING, 2012-01-01)
High resolution spatial light modulators (SLM) have been used in many different ways during the last years. Regarding speckle interferometry, different applications can be realized by integrating SLMs in interferometric ...
Effect of the internal modulation of speckles in displacement measurements in optical vortex metrology
(SPIE-INT SOC OPTICAL ENGINEERING, 2013-01-01)
The Optical Vortex Metrology is based on the possibility of characterizing, through topological and morphological parameters, each one of the vortices existing in the phase of the optical field, or in a pseudo-phase obtained ...
Volumetric non-local-means based speckle reduction for optical coherence tomography
(OSA - The Optical Society, 2018-07-01)
We present a novel tomographic non-local-means based despeckling technique, TNode, for optical coherence tomography. TNode is built upon a weighting similarity criterion derived for speckle in a three-dimensional similarity ...
Effect of the internal modulation of speckles in displacement measurements in optical vortex metrology
(SPIE, 2013-11-08)
The Optical Vortex Metrology is based on the possibility of characterizing, through topological and morphological parameters, each one of the vortices existing in the phase of the optical field, or in a pseudo-phase obtained ...
Features on photorefractive registered speckles
(SPIE, 1999-04-29)
The recording and read-out of a volume speckle pattern is investigated for transmission geometry. The modulation of the 3D speckle grains appears when the image of a coherently illuminated random diffusor is formed onto ...
Soap film analysis by speckle interferometer
(SPIE, 2003-11-18)
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 ...
Logic operations by using modulated speckle
(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 ...
Double exposure specklegrams obtained by using scaled aperture pupils
(SPIE, 2001-08-14)
In speckle photography the pupil aperture is usually not modified between exposures. In our work, the change of the pupil aperture scale between exposures is analyzed on the basis of double-exposed image speckle, before ...
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 ...
