Essilor International (compagnie Generale D'optique)

Essilor International

Asma Lakhoua

Cyril Guilloux

Jérôme Moine

Sebastien Fricker

Carlos Rego

Fabien Muradore

Sébastien Fricker

Guillaume Broutin

Pauline Colas

Stephane Gueu

Nicolas Lavillonniere

Stéphane Gueu

Samy Hamlaoui

Alain Goulet

Nicolas La Villonniere

A method is provided for providing a selection chart of non-prescription ophthalmic lenses. The method comprises providing at least one optical performance parameter threshold (OPPT) associated to an optical performance parameter (OPP); choosing the selection criterion (SC) among the selection criteria of the list consisting of: lens base curve; lens pantoscopic angle; and lens wrap angle; choosing a selection criterion range (SCR) for each of the chosen selection criterion; calculating selection domains (SD) defined by sub-ranges for each of the chosen SC within the SCR so as to determine and associate in each SD a single non-prescription ophthalmic lens with a spherical front surface, a complex back surface and a lens base curve. All the chosen OPPs are equal or less to the OPPT for all values of the SC within the SD associated to the single non-prescription ophthalmic lens.

Method for providing a selection chart of nonprescription ophthalmic lenses

The subject of the present invention is a method and a system for measuring the geometric or optical structure of an optical component. In particular, the invention relates to a method for measuring the geometric structure of a component bounded by a first side () and a second side (), said method comprising steps of: (S) measuring a first signal (MS) resulting from a first conversion of a first probe signal (PS), by at least said first side (); (S) measuring a second signal (MS) resulting from a second conversion of a second probe signal (PS), by at least said second side (); (S) determining a third conversion making it possible to convert a first set of coordinates (R) associated with the measurement of the first signal (MS) to a second set of coordinates (R) associated with the measurement of the second signal (MS); (S) estimating said first side () using the first signal (MS), said first simulation and a first cost criterion (V) quantifying a difference between the estimation (FS) and the first signal (MS); and (S) estimating said second side () using the second signal (MS), said second simulation, said third conversion and a second cost criterion (V) quantifying a difference between the estimation (ES) and the second signal (MS).

Method and tool for measuring the geometric structure of an optical component

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Charenton-le-Pont, France

Asma Lakhoua