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Evaluation between methods for the color measurement in holograms by using a CMOS-RGB camera and a spectrometerEvaluation between methods for the color measurement in holograms by using a CMOS-RGB camera and a spectrometer
(SPIE, 2013-07-22)
Many models and methods commonly used in colorimetry have been incorporated to the study and knowledge of the colorimetric properties in the reflection color holograms; these methods have reported the possibilities of color ...
Reduction of speckle noise in digital holography
(SPIE, 2004-10-21)
A fundamental problem in holography, as well optical as digital, is the presence of speckle noise in the reconstruction process -- Many approaches have been carried out in order overcome such a problem, ranging from altering ...
Shack - Hartmann spot dislocation map determination using an optical flow method
(OSA, 2014-01-14)
We present a robust, dense, and accurate Shack-Hartmann spot dislocation map determination method based on a regularized optical flow algorithm that does not require obtaining the spot centroids. The method is capable to ...
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 ...
Phase-object detection by use of double-exposure fringe-modulated speckle patterns
(OSA, 2003-01)
We study the properties of a double-exposure image specklegram of a diffuse object obtained by use of a doubleaperture pupil. A phase object is placed in front of one aperture during the first or the second exposure. Also, ...
Design of a control system for interferometric fringe stabilization system with remote access
(SPIE, 2013-11-18)
Stability in a fringe pattern is a necessary condition in interferometric processes, such as holography, and not always is enough the use of passive stabilization systems, like holographic tables, in particular, when ...
Propierties of speckle patterns generated through multiaperture pupils
(Elsevier, 2001-05-15)
The characteristics of the image speckles obtained through multiple aperture pupils are theoretically analyzed in terms of the parameters defining the pupils. The possibility of interpreting and synthesizing the image ...
Phase stepping in Lau interferometry
(Elsevier, 1999-06-15)
The implementation of phase shifting interferometry to analyze the Lau interferometric fringe patterns is proposed. The fundamentals of this application are theoretically discussed and the basis of the phase map interpretation ...
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 ...
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 ...
