Patent ID: 7359828

Claim:
A process for plotting a shape of a contour ( 5 , 6 , 9 , 10 ) of a previously machined ophthalmic lens ( 1 ), comprising: illuminating an optical face ( 2 , 3 ) of the lens ( 1 ) by a flat light beam ( 15 ) to form a linear light spot ( 16 ) on said face ( 2 , 3 ) such that the beam ( 15 ) extends beyond said face ( 2 , 3 ) and illuminates said contour ( 5 , 6 , 9 , 10 ); forming on an optical reception means ( 18 ) an image ( 21 ) of said light spot ( 16 ); rotating the lens ( 1 ) about an axis (A); scanning the contour ( 5 , 6 , 9 , 10 ) employing the light beam ( 15 ); plotting concomitantly on the optical reception means ( 18 ) successive positions of at least one single point (S, T, V) of said image ( 21 ) corresponding to an illuminated point (S′, T′, V′) of said contour ( 5 , 6 , 9 , 10 ); and deducing the shape of said contour ( 5 , 6 , 9 , 10 ).