Optica Aplicada
URI permanente para esta comunidad
Genera y transfiere conocimiento y apropia métodos y tecnologías en las áreas de procesamiento óptico de información y metrología óptica, relevantes para el avance científico, académico y productivo.
Líneas de investigación: Holografía; Metrología Óptica.
Código Minciencias: COL0011527.
Categoría 2019: A.
Escuela: Ciencias.
Departamento académico: Ciencias Físicas.
Coordinador: Elena Montilla; Carlos Andrés Trujillo.
Correo electrónico: emontill@eafit.edu.co; catrujilla@eafit.edu.co
Líneas de investigación: Holografía; Metrología Óptica.
Código Minciencias: COL0011527.
Categoría 2019: A.
Escuela: Ciencias.
Departamento académico: Ciencias Físicas.
Coordinador: Elena Montilla; Carlos Andrés Trujillo.
Correo electrónico: emontill@eafit.edu.co; catrujilla@eafit.edu.co
Examinar
Examinando Optica Aplicada por Materia "ANÁLISIS ESPECTRAL"
Mostrando 1 - 3 de 3
Resultados por página
Opciones de ordenación
Ítem Double aperture speckle method using a BSO crystal for in plane displacement(SPIE, 1999-07-06) Trivi, Marcelo Ricardo; Tebaldi, Myrian Cristina; Bolognini, Néstor Alberto; Ángel Toro, Luciano; Tebaldi, Myrian Cristina; Bolognini, Néstor Alberto; Trivi, Marcelo Ricardo; Ángel Toro, Luciano; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica AplicadaThe possibility of using a BSO crystal as a recording medium of specklegrams with carrying frequency fringes, to storage multiple interferograms, for uniform in-plane displacements, is presented. Experimental results are shown.Ítem Evaluation between methods for the color measurement in holograms by using a CMOS-RGB camera and a spectrometer(SPIE, 2013-07-22) Palacios Ortega, Natalith; Velásquez Prieto, Daniel; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica AplicadaMany 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 reproduction in holograms. One method is based in calculating the color differences between the CIE-L*a*b* coordinates of the original object compared to the same values obtained for the reconstructed hologram; these values are calculated through the measurement of the spectral composition of the light in the reproduced hologram which are made with spectrometers. Other methods are based in the use of cameras for the color measurement, although, they are not commonly used for that ending in holography. This work presents the results of a comparative study between the use of spectrometers and RGB digital cameras for the color measurement in holograms. The diffraction efficiency of the holograms for a GretagMacbeth Colorchecker samples is measured through a spectrometer and their CIE-L*a*b* coordinates are calculated; the color differences are also calculated by taking as theoretical values the coordinates of the original object. A similar procedure is made by capturing the reconstructed images of the hologram through a CMOSRGB camera, which requires a linearizing and characterizing procedure. The RGB coordinates of the original object are compared with the RGB coordinates of the reproduced hologram too. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.Ítem Speckle photography with different pupils in a multiple-exposure scheme(Optical Society of America, 2000-01-01) Ángel Toro, Luciano; Bolognini, Néstor Alberto; Tebaldi, Myrian Cristina; Trivi, Marcelo Ricardo; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica AplicadaThe 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 selectively isolate or combine the spectral content of different images into spatially separated regions in the Fourier plane -- Theoretical and experimental results extend the speckle photography technique to the depiction of several specklegrams of multiple uniform in-plane displacements -- In this case, because different pupils are considered for recording, the cross-correlation functions for the amplitudes and intensities in the image plane are calculated on the basis of the statistical properties of the object -- Also, the ensemble-average intensity in the Fourier plane is analytically derived, and fringe visibility is investigated. © 2000 Optical Society of America [S0740-3232(00)01701-4]OCIS codes: 120.0120, 120.3180, 120.3940, 120.6160