Patent ID: 7004821

Claim:
Process for bevelling at least one edge ( 5 , 6 ) of an optical face ( 2 , 3 ) of an ophthalmic lens ( 1 ), which includes a plotting stage in which the successive curvatures (α) of the optical face ( 2 , 3 ) are plotted in the vicinity of and along the edge ( 5 , 6 ) to be bevelled, characterized in that, in the plotting stage, the edge ( 5 , 6 ) to be bevelled is scanned using an optical measurement device providing a flat light beam ( 23 ) forming a linear light spot ( 24 ) on the optical face ( 2 , 3 ), an image ( 29 ) of the light spot ( 24 ) is simultaneously formed on optical reception means ( 26 ), the successive curvatures (α) of the optical face ( 2 , 3 ) are deduced by means for calculating the curvature of said face in the vicinity of the edge ( 5 , 6 ) from the successive positions of this image ( 29 ), and in that it includes a bevelling stage in which the lens ( 1 ), mounted on a rotary support to be rotated about an axis (A 1 ), is brought into contact by its edge ( 5 , 6 ) with a bevelling tool ( 9 ) by means for moving the rotary support, and the relative positioning of the lens ( 1 ) and of the tool ( 9 ) is controlled by a control unit according to the plots produced.