Method for bevelling an ophthalmic lens
AssigneeEssilor International
InventorsAndrea Molinaro, Sarah Boukobza, Marc Perrier
Life of this patent
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Abstract
A method for producing an instruction for bevelling an ophthalmic lens, with a view to mounting same in a framework of a spectacle frame into which a bevelled display lens is initially fitted. The method includes the steps of: a) acquiring a correction parameter relative to the play between the framework and the display lens; b) capturing a surface image of the display lens previously removed from the framework; c) determining, on the surface image, an initial contour (C0) of the display lens; d) calculating a corrected contour (C1), by correcting the initial contour according to the correction parameter; and e) deriving the bevelling instruction according to the corrected contour.
Claims17
A method for working out a setting for beveling an ophthalmic lens, with a view to its insertion in an eyewire of a spectacle frame in which a beveled demonstration lens is initially mounted, the method comprising the steps of:
- a) acquiring a correctional parameter relating to the play between the eyewire and the demonstration lens;
- b) capturing a front-on image of the demonstration lens extracted beforehand from the eyewire;
- c) determining, in said front-on image, an initial outline of said demonstration lens;
- d) calculating a corrected outline, by correcting the initial outline depending on said correctional parameter;
- and
- e) deducing said setting for beveling an ophthalmic lens depending on said corrected outline.
A method for preparing an ophthalmic lens with a view to insertion of the ophthalmic lens in an eyewire of a spectacle frame in which a beveled demonstration lens is initially mounted, the method comprising the steps of:
- working out a setting for beveling the ophthalmic lens for insertion in the eyewire of the spectacle frame in which a beveled demonstration lens is initially mounted, including:
- a) acquiring a correctional parameter relating to a play between the eyewire and the demonstration lens;
- b) capturing a front-on image of the demonstration lens extracted beforehand from the eyewire;
- c) determining, in said front-on image, an initial outline of said demonstration lens;
- d) calculating a corrected outline, by correcting the initial outline depending on said correctional parameter;
- and
- e) deducing said setting for beveling an ophthalmic lens depending on said corrected outline;
- and
- beveling the ophthalmic lens according to the setting for beveling deduced in step e), then, when the ophthalmic lens is not suitable for insertion in the eyewire:
- reworking the bevel of the ophthalmic lens in such a way that it is made suitable for insertion in the eyewire,
- capturing a front-on image of the reworked ophthalmic lens,
- determining, in said front-on image, a reworked outline of said reworked ophthalmic lens, and
- correcting said coefficient depending on the difference between the reworked outline and the corrected outline.
Dependencies are inferred from the claim text.