| 摘要 |
The invention relates to a method of calibrating an ophthalmic-lens-piercing machine, a device used to implement one such method and an ophthalmic-lens-machining apparatus comprising one such device. The inventive method applies to a machine comprising a piercing tool, a lens support which is associated with a first reference mark (O<SUB>1</SUB>, X<SUB>1</SUB>, Y<SUB>1</SUB>), and programmable tool-control means which are associated with a second reference mark expressing set co-ordinates which define a target piercing point (M). The inventive method consists in: placing a template ( 21 ) on the support, said template comprising pre-applied markings defining a third reference mark (O<SUB>3</SUB>, X<SUB>3</SUB>, Y<SUB>3</SUB>), such that the third reference mark is essentially in line with the first reference mark; piercing the template at a pre-determined point corresponding to a target point; taking an image of the template thus pierced; analysing said image such as to measure the misalignment between the real piercing point position and the target point position; and programming the control means, such as to apply a correction to the set co-ordinates that can compensate for the misalignment. The invention also relates to a device which is used to implement said method and to an ophthalmic-lens-machining apparatus comprising one such device.
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