| Issue |
EPJ Web Conf.
Volume 335, 2025
EOS Annual Meeting (EOSAM 2025)
|
|
|---|---|---|
| Article Number | 13002 | |
| Number of page(s) | 2 | |
| Section | Focused Session - Visual Optics and Imaging | |
| DOI | https://doi.org/10.1051/epjconf/202533513002 | |
| Published online | 22 September 2025 | |
https://doi.org/10.1051/epjconf/202533513002
The torsion, the local conical constants and their application in corneal topography
1 Universidade Vigo, Circunvalación au Campus Universitario, 36310, Vigo, Pontevedra, España
2 Universidad Pontificia Bolivariana, Campus Laureles, Circular 1ra. # 70-01, bloque 3, piso 1, oficina 102, CIDI, Medellín, Colombia
3 LNE Laboratoire National de Métrologie et d'Essais, Pôle Photonique-Energétique, 29 av. Roger Hennequin, 78197, Trappes Cedex, 720229, France
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 22 September 2025
Abstract
Elevation topography equipment measures freeform surfaces by representing the surface with elevation maps, maximum curvature, minimum curvature, mean curvature, and Gaussian curvature. From a geodetic point of view, every regular point on a parametric surface can be described as a function of the principal curvatures and the local torsion concerning a reference path at each point. Here, we present some fundamentals required to create these density maps to represent the absolute torsion and the local conic constant of all points on a regular freeform surface.
© The Authors, published by EDP Sciences, 2025
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