Method and machine for etching optical lenses
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorCedric Lemaire
Life of this patent
Estimating the term…
Abstract
A method for machining an optical lens via a trimming machine, includes: —a step of locking the optical lens, —a step of acquiring shape characteristics of the optical faces of the optical lens, —a step of generating an instruction for trimming the optical lens, and —a step of trimming the optical lens along a desired contour. The method also includes the following steps: —a step of generating an instruction for etching the optical lens depending on the acquired shape characteristics, and —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.
Claims22
A method for machining an optical lens using a trimming machine, the method comprising:
- immobilizing said optical lens on an immobilizing system of said trimming machine;
- acquiring geometric characteristics relating to the shape of at least one of the optical faces of the optical lens;
- defining trimming instructions for the optical lens as a function of the acquired geometric characteristics;
- trimming the optical lens around a desired outline, during which a trimming tool of the trimming machine is driven relative to said immobilizing system according to said trimming instructions;
- defining etching instructions for said optical face of the optical lens as a function of the acquired geometric characteristics by
- acquiring the shape and the position of at least one interference zone comprising at least a zone of contact between said optical face and said immobilizing system, and
- identifying, inside the desired outline, at least one suitable zone in which the line can be etched, taking the shape and the position of each interference zone into account;
- and
- etching said optical face of the optical lens along a line situated inside said desired outline, during which a sharp etching tool of said trimming machine is driven relative to said immobilizing system according to said etching instructions such that a point of the tool slides continuously on said optical face in order to scratch the optical face along said line.
A machine for trimming an optical lens, the machine comprising:
- an immobilizing system configured to immobilize the optical lens;
- a first acquisition system configured to acquire geometric characteristics relating to the shape of at least one of the optical faces of the optical lens immobilized in said immobilizing system;
- a second acquisition system configured to acquire trimming instructions for the optical lens;
- a trimming tool configured to trim the optical lens;
- a driving device configured to drive said trimming tool relative to said immobilizing system according to said trimming instructions;
- an etching tool which comprises an abrasive point configured to score said optical face of said optical lens,
- wherein said second acquisition system is configured to acquire etching instructions for said optical face of the optical lens, and
- wherein said driving device is configured to drive said etching tool relative to said immobilizing system according to said etching instructions such that said point slides on said optical face in order to scratch the optical face.
A method for machining an optical lens to be engaged in a frame by a trimming machine, the method comprising:
- immobilizing the optical lens on an immobilizing system of said trimming machine;
- acquiring geometric characteristics relating to the shape of at least one of the optical faces of the optical lens;
- defining trimming instructions for the optical lens as a function of the acquired geometric characteristics;
- and
- trimming the optical lens around a desired outline, during which a trimming tool of the trimming machine is driven relative to said immobilizing system according to said trimming instructions;
- defining etching instructions for said optical face of the optical lens as a function of the acquired geometric characteristics acquired by
- acquiring the shape and the position of at least one interference zone comprising at least the zone of contact between said optical face and said immobilizing system, and the zones for attaching the bridge and the temple of the spectacle frame or the surrounding zone of the rim of the spectacle frame, and
- identifying, inside the desired outline, at least one suitable zone in which the line can be etched, taking the shape and the position of each interference zone into account;
- and
- etching said optical face of the optical lens along a line situated inside said desired outline, during which a sharp etching tool of said trimming machine is driven relative to the immobilizing system according to said etching instructions such that a point of the etching tool slides continuously on said optical face to scratch the optical face along said line.
Dependencies are inferred from the claim text.