Essilor International (compagnie Generale D'optique)

Essilor International

Fabien Lafon

Thierry Baudart

Guillaume Martin

Hanna Sauze

A holder () for pneumatically blocking an optical lens () on a surfacing machine, includes:&#x2014;a gripping part () for fixing it to a corresponding member () of the surfacing machine, and&#x2014;a part () for blocking the optical lens, which includes a body () from which there protrude abutments which are designed to afford the optical lens a rigid seat, and a seal () against which the optical lens is able to be brought to bear in order to delimit with the body a vacuum chamber (). The abutments include first rods () which are mounted so as to be movable in translation with respect to the body in order to bear by way of their free ends () against the optical lens, and provision is made of return elements () for returning the first rods against the optical lens.

Holder for pneumatically blocking an optical lens

Method for determining the edge contour of an uncut spectacle lens comprises: a spectacle frame data providing step, a minimum edge thickness providing step, an initial contour providing step, a thickness determining step, an optimized point selecting step, a repeating step, and a edge contour determining step.

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Charenton-le-Pont, France

Fabien Lafon