Quiroga Mellado, Juan AntonioRodríguez Ibáñez, DiegoAlonso Fernández, José2023-06-192023-06-192013-090268-376810.1007/s00170-013-4746-yhttps://hdl.handle.net/20.500.14352/33371© The Author(s) 2013. This article is published with open access at Springerlink.com. This work was supported by the Spanish Ministry of Science and Technology under grant DPI2009-09023. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.This paper proposes a calibration procedure for the squareness error of small-sized coordinate measuring machines like those used for ophthalmic lenses quality control. The proposed procedure only requires a spherical lens as a reference surface and it only needs to be measured once making this calibration method faster and cheaper than the existing ones.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttp://dx.doi.org/10.1007/s00170-013-4746-yhttp://link.springer.comopen access535CMMCalibrationSquareness ErrorVolumetric ErrorOphthalmic Lenses Quality ControlÓptica (Física)2209.19 Óptica Física