Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Ivan Choque"'
Publikováno v:
Revista de Investigación de Física, Vol 18, Iss 1 (2015)
En este trabajo se muestra que, a partir de un interferograma, es posible calcular el error de la forma cóncava para una superficie pulida ópticamente que será usada como espejo en un telescopio reflector. En el Laboratorio de Óptica de la PUCP,
Externí odkaz:
https://doaj.org/article/7aee26d2692941e39682a217e831061b
Publikováno v:
IECON 2022 – 48th Annual Conference of the IEEE Industrial Electronics Society.
Autor:
Ivan Choque
Publikováno v:
Centro de Investigaciones en Óptica
CIO
Repositorio Institucional CIO
CIO
Repositorio Institucional CIO
"In this dissertation, we present a procedure to measure the phase from non-uniform phase-shifting interferograms in order to estimate the surface topography of an aluminum thin film. Interferograms are acquired from a Michelson interferential micros
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::f84ec72e98aa2b3cdc7494b5077e2675
http://cio.repositorioinstitucional.mx/jspui/handle/1002/1213
http://cio.repositorioinstitucional.mx/jspui/handle/1002/1213
Publikováno v:
Interferometry XX.
In this work, we introduce the windowed generalized phase-shifting algorithms (WG-PSAs) using static and dynamic weighting functions/widows. These algorithms are derived from a weighted least square fitted to the monochromatic temporal fringe, thereb
Publikováno v:
Applied optics. 59(20)
In this paper, we introduce an iterative scheme for phase demodulation of interferograms with nonuniformly spaced phase shifts. Our proposal consists of two stages: first, the phase map is obtained through a least squares fitting; second, the phase s
Publikováno v:
Optics letters. 44(9)
We introduce the frequency transfer function (FTF) formalism for generalized least squares phase-shifting algorithms (GLS-PSAs), whose phase shifts are nonuniformly spaced. The GLS-PSA's impulsive response is found by computing the Moore-Penrose pseu
Publikováno v:
Optics express. 27(4)
Standard phase-stepping algorithms (PSAs) estimate the measuring phase of linear carrier temporal-fringes with respect to a linear-reference. Linear-carrier fringes are normally obtained using feedback, closed-loop, optical phase-shifting devices. On
Publikováno v:
Journal of the Optical Society of America A. 37:614
In this paper, we present new phase-shifting algorithms (PSAs) that suppress the ripple distortions and spurious pistons in phase-shifting interferometry. These phase errors arise when non-uniform phase-shifting interferograms are processed with PSAs
Autor:
Jorge L. Flores Nuñez, Manuel Servin, Antonio Muñoz, Ivan Choque, Sotero Ordoñes Nogales, Moises Padilla
Publikováno v:
Optical Engineering. 59:1
We propose a fringe-projection profilometry technique for shape defects measurement, which can be employed for three-dimensional (3-D) quality inspection. The proposal consists of using a template surface to design phase-shifting algorithms with spec
Publikováno v:
Applied Optics. 58:4157
In this paper, we propose a phase measurement method for interferograms with nonuniform phase shifts. First, we measure the phase shifts between consecutive interferograms. Second, we use these values to modify the spectrum of the interferogram data.