title: Large-aperture automatic focimeter for the measurement of optical power and other optical characteristics of ophthalmic lenses.
abstract: We propose an optical apparatus enabling the measurement of spherical power, cylindrical power, and optical center coordinates of ophthalmic lenses. The main advantage of this new focimeter is to provide a full bidimensional mapping of the characteristics of ophthalmic glasses. This is made possible thanks to the use of a large-area and high-resolution position-sensitive detector. We describe the measurement principle and present some typical mappings, particularly for progressive lenses. We then discuss the advantages in terms of speed and versatility of such a focimeter for the measurement of complex lens mappings.
authors.affiliation: Département d'Optique, Ecole Nationale Supérieure de Telecommunications de Bretagne, Brest, France.
authors.forename: Kondo
authors.initials: K
authors.lastname: Gnanvo
authors.forename: Zong Yan
authors.initials: ZY
authors.lastname: Wu
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: de Bougrenet de la Tocnaye
authors.forename: Liren
authors.initials: L
authors.lastname: Liu
mesh_terms: D004867:Equipment Design; D005139:Eyeglasses; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*