Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Victor de Emanuel Armengol-Cruz"'
Autor:
Daniel Aguirre-Aguirre, Victor de Emanuel Armengol-Cruz, Manuel Campos-García, Oliver Huerta-Carranza, Víctor Iván Moreno-Oliva
Publikováno v:
OSA Continuum. 4:158
Misalignments are a common problem in corneal topography reconstruction. To determine the topography of the surface using a corneal topographer based on the null-screen method, it is necessary to measure errors caused by mechanical misalignment of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fcdb51ed3cd7e4ca3e6704e41251655
https://doi.org/10.1364/osac.409933
https://doi.org/10.1364/osac.409933
Autor:
Manuel Campos-García, Victor de Emanuel Armengol-Cruz, Daniel Aguirre Aguirre, Christian Camargo-Fierro
Publikováno v:
Optical Fabrication, Testing, and Metrology VI.
In this work, the topography of human corneas is evaluated with a conical corneal topographer based on the null-screen method. Geometrical parameters such as the radius of curvature and the conic constant, are obtained. Additionally, elevation, sagit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e22744bb4218c2ec43d574511a30ac69
https://doi.org/10.1117/12.2314148
https://doi.org/10.1117/12.2314148
Publikováno v:
SPIE Proceedings.
In this work, we design a conical null-screen for testing non-symmetric corneas. We proposed a custom evaluation algorithm in order to calculate the shape of the corneal surface. This data is fitting to a custom non-symmetrical shape surface, taking
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbf7ff3f8a84d9d75035a332a6ae8d15
https://doi.org/10.1117/12.2270042
https://doi.org/10.1117/12.2270042
Publikováno v:
SPIE Proceedings.
We extend the principles of the null-screen method for testing fast aspheric surfaces with polynomial expansion. We present the formulae to design the null-screen in such a way that the image on the CCD is a perfect array circular points; the departu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6190f2454db8207fc2f1404ab3d5afa6
https://doi.org/10.1117/12.2271676
https://doi.org/10.1117/12.2271676
Publikováno v:
OSA Continuum. 2:736
In this work, a conical corneal null-screen topographer is presented. The device is designed to adapt to the human morphology of the face and measures the human cornea assuming that its shape is an aspherical surface. The evaluation of the performanc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21cfe83dfa79bbaf5988d663a4bd6993
https://doi.org/10.1364/osac.2.000736
https://doi.org/10.1364/osac.2.000736
Autor:
Manuel Campos-García, Jorge Marquez-Flores, Victor de Emanuel Armengol-Cruz, José Rufino Díaz-Uribe, Cesar Cossio-Guerrero, Arturo I. Osorio-Infante
Publikováno v:
Applications of Digital Image Processing XXXIX.
In this work, we propose some algorithms to recover the centroids of the resultant image obtained by a conical nullscreen based corneal topographer. With these algorithms, we obtain the region of interest (roi) of the original image and using an imag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a3b60b1595674a9aab48b7262b3c3cf
https://doi.org/10.1117/12.2237979
https://doi.org/10.1117/12.2237979
Autor:
José Rufino Díaz-Uribe, Manuel Campos-García, Cesar Cossio-Guerrero, Victor de Emanuel Armengol-Cruz, Arturo I. Osorio-Infante
Publikováno v:
SPIE Proceedings.
In this work, we will present some improvements to the conical null-screen based corneal topographer, for testing aspheric surfaces without rotational symmetry. We present the formulae to design the conical null-screen in such a way that the image on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad2b0e57a4485978c889eefaa210b10a
https://doi.org/10.1117/12.2237372
https://doi.org/10.1117/12.2237372