Process for bevelling an ohthalmic lens including a plotting...

Details Process for bevelling an ohthalmic lens including a plotting... Process for bevelling an ohthalmic lens including a plotting...

2006-02-28

2006-02-28

Shakeri, Hadi (Department: 3723)

Abrading

Abrading process

Glass or stone abrading

C451S006000, C451S008000

Reexamination Certificate

active

07004821

ABSTRACT:
Process for bevelling at least one edge (6) of an optical face (3) of an ophthalmic lens (1), in which the successive curvatures of the optical face (3) are plotted in the vicinity of and along the edge (6) to be bevelled. The edge (6) to be bevelled is scanned with a flat light beam (23) forming a linear light spot (24) on the optical face (3), an image of the light spot (24) is simultaneously formed on optical reception elements (26), the successive curvatures of the optical face (3) in the vicinity of the edge (6) are deduced from the successive positions of this image. This process includes a bevelling stage. Then the lens (1) is rotated about an axis (A1), is brought into contact by its edge (6) with a bevelling tool, and the relative positioning of the lens (1) and of the tool is controlled according to the plots produced.

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patent: 1 250 979 (2002-10-01), None
patent: 2 734 505 (1996-11-01), None

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