Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Alejandro Velez-Zea"'
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-15 (2023)
Abstract This study demonstrates a full-color near-eye holographic display capable of superimposing color virtual scenes with 2D, 3D, and multiple objects with extended depth upon a real scene, which also has the ability to present different 3D infor
Externí odkaz:
https://doaj.org/article/c9a44eab68e84f2a832adac6fca9ded1
Publikováno v:
Applied optics. 61(11)
We demonstrate the generation of phase holograms of multiple 3D objects at different axial positions without cross talk and significant improvements in performance over conventional methods. We first obtain the phase hologram of two 3D objects, each
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74f180c02f031c8b4302786bc5fe6dc7
https://pubmed.ncbi.nlm.nih.gov/35471307
https://pubmed.ncbi.nlm.nih.gov/35471307
Publikováno v:
Imaging and Applied Optics Congress 2022 (3D, AOA, COSI, ISA, pcAOP).
We demonstrate the generation of phase holograms of multiple overlapping 3D objects at different axial positions without crosstalk. We introduce a singular value decomposition approach, leading to significant improvements in performance over conventi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a93ec5240b8d13a22a19121a3b887b6
https://doi.org/10.1364/3d.2022.jw2a.2
https://doi.org/10.1364/3d.2022.jw2a.2
Publikováno v:
Optics Letters. 48:672
In this Letter, we propose an opto-digital cryptosystem based on the joint transform correlator architecture without the need for a reference beam, phase-shifting techniques, or an additional window in the input plane. In this system, only two intens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18fcdb25639c41dfd004f6ea3540ebbf
https://doi.org/10.1364/ol.478132
https://doi.org/10.1364/ol.478132
Autor:
Alejandro Velez-Zea
Publikováno v:
Applied optics. 60(2)
In this work, we introduce a mixed complex and phase only constraint to the Gerchberg–Saxton (G–S) algorithm, leading to improvements in the generation of holograms from multiplane light field distributions. To achieve this, we determine the opti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63bae86020f5f1ef8185b41ef8a1b5af
https://pubmed.ncbi.nlm.nih.gov/33448943
https://pubmed.ncbi.nlm.nih.gov/33448943
Autor:
Alejandro Velez-Zea, Roberto Torroba, John Fredy Barrera-Ramírez, Santiago Bustamante Quinchia
Publikováno v:
OSA Imaging and Applied Optics Congress 2021 (3D, COSI, DH, ISA, pcAOP).
We demonstrate how the use of optimized random phases enables the fast computation of binary amplitude holograms via thresholding. We obtain similar performance compared to the Gerchberg-Saxton algorithm with a significant speed advantage.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cd02a0813d867b85bdc68924cb194a2
https://doi.org/10.1364/dh.2021.dtu7b.5
https://doi.org/10.1364/dh.2021.dtu7b.5
Publikováno v:
OSA Imaging and Applied Optics Congress 2021 (3D, COSI, DH, ISA, pcAOP).
We introduce a modified hologram plane constraint to the global Gerchberg-Saxton algorithm for improved multiplane phase-only hologram generation. We demonstrate a 17% increase in the reconstruction quality compared with previously reported methods.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e64a1e6c2e81b178a580cfc91939eb4
https://doi.org/10.1364/dh.2021.dth7c.4
https://doi.org/10.1364/dh.2021.dth7c.4
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
https://doi.org/10.1088/2040-8986/ac6df3
Publikováno v:
Optics and Lasers in Engineering. 151:106921
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5227edc82c87fc67336f0ce330591be0
https://doi.org/10.1016/j.optlaseng.2021.106921
https://doi.org/10.1016/j.optlaseng.2021.106921
Autor:
John Alexis Jaramillo-Osorio, Walter Torres-Sepúlveda, Alejandro Velez-Zea, Alejandro Mira-Agudelo, John Fredy Barrera-Ramírez, Roberto Torroba
Publikováno v:
Optics & Laser Technology. 148:107689
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc88cf61b222b90a8f2b34799f1dfb4d
https://doi.org/10.1016/j.optlastec.2021.107689
https://doi.org/10.1016/j.optlastec.2021.107689