| 摘要 |
Process for plotting the shape of a contour ( 5, 6 ) of a previously machined ophthalmic lens ( 1 ), which comprises the steps of: illuminating an optical face ( 2, 3 ) of the lens ( 1 ) with a flat light beam ( 15 ) to form a linear light spot ( 16 ) on this face ( 2, 3 ), such that the beam ( 15 ) extends beyond said face ( 2, 3 ) and illuminates the contour ( 5, 6 ); forming on the optical reception element ( 18 ) an image of the light spot ( 16 ); rotating the lens ( 1 ) about an axis (A); scanning the contour ( 5, 6 ) with the light beam ( 15 ); plotting concomitantly on the optical reception element ( 18 ) the successive positions of at least one single point of this image corresponding to the illuminated point of the contour ( 5, 6 ); deducing the shape of the contour ( 5, 6 ).
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