Essilor International (Compagnie Generale D'optique)

James Thepot

Fabien Divo

Laurent Guillermin

The measurement apparatus includes: a support arranged to receive a lens; lighting element including an optical system for generating a collimated light beam directed towards the lens under measurement installed on the support; detachment elements for detaching light rays from the light beam, for detaching a localized group of at least three non-coplanar light rays grouped together about a measurement axis in a measurement cylinder of section substantially smaller than the section of the lens under measurement; acquisition elements for identifying the deflections imparted by the lens on the detached light rays and for delivering a signal representative of the deflections; and an electronic and computer system programmed to deduce from said deflections the value of the refractive characteristic of the lens at the measurement point.

Method and apparatus for locally measuring refractive characteristics of a lens in one or several specific points of said lens

Device comprising in combination: elements for detecting () characteristics of a lens; elements for integrating characteristics representing a patient's morphology; a support () of the mobile lens along a predetermined trajectory between a first measuring position and a loading position; grinding elements (); and elements forming a gripping and clamping clip () for transporting the lens from the loading position to the grinding position.

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Charenton, France

James Thepot