Výsledky vyhledávání - "Astrid Lorena Villamizar Amado"

Vortex technique to track 3D object displacement in CGH

Autor: Astrid Lorena Villamizar Amado, Alejandro Velez-Zea, Myrian Tebaldi

Publikováno v: Journal of Optics. 24:075603

In this work, we introduce and test a technique to track the movement of objects from computer-generated holographic videos, without the need for reconstruction. To achieve this, we first generated holographic videos of moving 3D objects using a rand

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::735cfcae6797cc86ea67fd131d54555a
https://doi.org/10.1088/2040-8986/ac6df3

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Unstable phase singularities in noise contaminated images

Autor: Myrian Tebaldi, Astrid Lorena Villamizar Amado, Hector Jorge Rabal, Silvana Gallo, Nelly Cap

Publikováno v: Applications of Digital Image Processing XLIII.

As it is well known, the vortices or phase singularities are optimal encoders for position marking. The pseudo-phase singularities information can be obtained from the complex signal resulting from Laguerre-Gauss filtering of the intensity image. Eac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::81ca8a36ebeb2a690c43e28f74e85d23
https://doi.org/10.1117/12.2568733

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Echocardiography images analysis by using Laguerre Gauss Transform

Autor: Astrid Lorena Villamizar Amado, Myrian Tebaldi, Silvana Gallo, Héctor Rabal, Nelly Cap

Publikováno v: Frontiers in Optics / Laser Science.

We propose the generalization of the Laguerre Gauss Transform by using elliptical kernels in vortices metrology. This permits the generation of a family of very close vortices used to measure strain in cardiac ultrasound images.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12afe730c486ba2c057decd0efee41ab
https://doi.org/10.1364/fio.2020.jth4b.31

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Alternative representation for optimized phase compression in holographic data

Autor: Astrid Lorena Villamizar Amado, Roberto Torroba, Alejandro Velez Zea, Myriam Cristina Tebaldi

Recent advances in phase only liquid crystal on silicon spatial light modulators are making the prospect of commercial fully holographic display a distinct possibility in the near future. There are, however, many remaining challenges when dealing wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35cfcd088a3dc53839f8a13bca8e829a
https://www.osapublishing.org/abstract.cfm?URI=osac-2-3-572

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Diffraction efficiency in quasi-degenerate coupling in photorefractive materials

Autor: Astrid Lorena Villamizar Amado, Zandra Lizarazo, Néstor Alonso Arias Hernández, Myrian Tebaldi, Martha Lucía Molina Prado

Publikováno v: SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

The aim of this work is to present theoretical analysis of the diffraction efficiency in sillenite BTO crystal, for mobile transmission gratings, where the effects of coupling beams are significant . In case of the degenerate coupling in photorefract

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab7693e349e2edf2a4b691768f434e23
http://sedici.unlp.edu.ar/handle/10915/124389

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Poincare sphere noise filtering for singularities in dynamic speckle activity: Application to paint drying time measurement

Autor: Adel Elmaghraby, Astrid Lorena Villamizar Amado, Héctor Rabal, Eduardo Emilio Grumel, Myrian Tebaldi, Daniel Sierra-Sosa

Publikováno v: Optics and Lasers in Engineering. 136:106317

We present an approach based on optical vortex density to characterize a dynamic process. The proposal is tested in real experiments involving the drying of paint as case study. In this case, speckle patterns are generated by coherent light scattered

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::089b07285d05260a95982e78495d4e63
https://doi.org/10.1016/j.optlaseng.2020.106317

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Analisis de la eficiencia de difracción en configuración transversal en cristales silenitas Bi12TiO20

Autor: Astrid Lorena Villamizar Amado, Néstor Alonso Arias Hernández, Martha Lucía Molina Prado, Myriam Cristina Tebaldi

Publikováno v: RiUPTC: Repositorio Institucional UPTC
Universidad Pedagógica y Tecnológica de Colombia
instacron:Universidad Pedagógica y Tecnológica de Colombia
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

Se realiza un estudio teórico en cristales silenitas, donde se obtiene una expresión analítica para la eficiencia de difracción en el régimen de Bragg, en la configuración transversal (K < 001 >). Se considera redes nomóviles de transmisión.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4638371e9c2a86761d226af796c48a9
https://revistas.uptc.edu.co/index.php/ciencia_en_desarrollo/article/view/7795

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Optimization of the diffraction efficiency in photorefractive crystals

Autor: Myriam Cristina Tebaldi, Astrid Lorena Villamizar Amado, Martha Lucía Molina Prado, Néstor Alonso Arias Hernández

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

The aim of this work is to study and to optimize the diffraction efficiency in sillenite BTO crystals. A theoretical analysis, where the effects of coupling beams are significant,is carried on. In addition, non-mobile transmission gratings are consid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f19b9f3764aec0aa65bb65b82ee0e1d
http://www.sedoptica.es/Menu_Volumenes/Pdfs/OPA_50_2_49044.pdf

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