Essilor International (compagnie Generale D'optique)

Essilor International

Cedric Lemaire

Sebastien Pinault

Ahmed Haddadi

Michel Nauche

Konogan Baranton

Cedric Begon

Montserrat Burgos

Aude Lapprand

Xavier Lippens

Christian Massart

Gilles Massey

Catherine Roussel

Patrice Szymanski

Gerard Poirrier

Romain Batherosse

Disclosed is a method for checking at least one geometric characteristic and one optical characteristic of a trimmed ophthalmic lens () including the following steps: a) arranging the trimmed ophthalmic lens on a support (), b) capturing at least one image of the trimmed ophthalmic lens, c) determining, from the image, a measured geometric characteristic of the trimmed ophthalmic lens, d) determining at least one measured optical characteristic of the trimmed ophthalmic lens in a reference frame of the image captured in step b), e) comparing the measured geometric characteristic associated with the measured optical characteristic to a predefined desired ophthalmic lens model, including at least one desired geometric characteristic and one associated desired optical characteristic. Also disclosed is an associated checking device.

Method for checking a geometric characteristic and an optical characteristic of a trimmed ophthalmic lens and associated device

A method for machining an optical lens via a trimming machine, includes: &#x2014;a step of locking the optical lens, &#x2014;a step of acquiring shape characteristics of the optical faces of the optical lens, &#x2014;a step of generating an instruction for trimming the optical lens, and &#x2014;a step of trimming the optical lens along a desired contour. The method also includes the following steps: &#x2014;a step of generating an instruction for etching the optical lens depending on the acquired shape characteristics, and &#x2014;a step of etching the optical lens along a line located inside the desired contour, during which a pointed etching tool of the trimming machine is controlled according to the etching instruction in such a way that the point of same continually slides against the optical face in order to score same along the line.

Method and machine for etching optical lenses

A method for drilling an ophthalmic lens () includes the following steps: &#x2014;memorizing the desired shape and dimensions of a drill hole () to be drilled in the ophthalmic lens () and the position of the opening of this drill hole on one of the faces () of the ophthalmic lens; &#x2014;positioning a drilling tool () facing the memorized position of the hole to be drilled; &#x2014;determining a control setpoint for the transverse movement and axial advance of the drilling tool; and &#x2014;drilling the ophthalmic lens according to the control setpoint. The control setpoint for the transverse movement and axial advance of the drilling tool forces the point of this drilling tool, on at least one drilling run, to follow a helical or pseudohelical trajectory depending on the desired shape and dimensions of the drill hole. An associated drilling device is also described.

Method for drilling an ophthalmic lens in a helical trajectory and associated drilling device

A method for cutting-out a multi-layer ophthalmic lens () following a desired contour (C), includes: a step of pre-blanking the ophthalmic lens () using a preliminary tool (), according to a preliminary contour (CC); a step of blanking the ophthalmic lens () using a blanking wheel (), following a blanking contour (CC); and a step of finishing the ophthalmic lens () using a finishing tool (). According to the invention, the preliminary contour (CC) is larger than the desired contour (C), and the blanking wheel () used has a granulometry of between 0.1 and 0.5 mm and is controlled in relation to the ophthalmic lens () so as to apply a radial force of between 0.1 and 5 N to the ophthalmic lens () during the blanking step.

Method for cutting-out a multi-layer ophthalmic lens

Method of shaping an ophthalmic eyeglass lens presenting two main optical working faces and including firstly a substrate made of a first material and presenting two main faces corresponding to the two main faces of the lens, and secondly at least one coating film made of a material distinct from that of the substrate, the coating film being previously secured on at least one of the main faces of the substrate, includes:

Method for trimming a pre-coated ophthalmic eyeglass lens

A method for trimming an ophthalmic lens using a machining device having a load sensor for measuring a load relating to the load applied by a machine tool to the lens, includes: immobilizing the lens on an immobilizing element, and trimming the lens, while measuring the load magnitude and steering the machine tool relative to the immobilizing element so as to bring the initial contour of the ophthalmic lens to a final contour of a different shape. Between the immobilizing and trimming steps, the machine tool is steered relative to the immobilizing element so that it makes a tour around the lens without contact therewith, while measuring the unladen load magnitude, this relating to the load required to move the machine tool relative to the immobilizing element without performing machining work while steering the machine tool, during the trimming step, as a function of the unladen magnitude measured.

Method for trimming an opthalmic lens

A method of shaping an ophthalmic lens includes machining the edge face of the lens by at least one rotary tool having an axis of rotation movable relative to the lens axis, both in rotation and radial and axial translation. These movements are controlled so that the edge face of the lens presents a profiled shape with an engagement ridge suitable for engaging in a bezel of eyeglasses and first and second margins. Given first and second longitudinal curves of the first and second margins, respectively, the edge face of the lens is machined in such a manner that, at each axial section of the lens, the traces in the axial section of the first and second longitudinal curves present first and second distances from the axis of the lens, with the difference (rs) therebetween being a function of the position of the plane of the axial section under consideration.

Method of shaping an ophthalmic lens

The present invention relates to a device and to a method for shaping an optical lens. According to the invention, a selection is provided between either a first tool () for machining the edge face of the lens, and a cutter tool () for cutting through the material of the lens, for the purpose of performing at least one given shaping operation. The invention also provides a method of shaping an optical lens coated in a treatment with low surface energy, the method including cutting through the material of the lens.

Method and device for trimming a lens by cutting said lens

A method of shaping an optical lens () includes at least one operation of edging along a desired outline that includes cutting through the material of the lens () includes a cutting-out tool (). Cutting out includes a plurality of passes, each performed along the desired outline as a pass that is axially shallow.

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Charenton-le-Pont, France

Cedric Lemaire