Method and apparatus for edge contouring lenses

Details Method and apparatus for edge contouring lenses Method and apparatus for edge contouring lenses

1986-07-25

1987-03-24

Albritton, C. L.

Electric heating

Metal heating

By arc

219212LN, 219121LP, 219121LQ, 219121LT, 264 14, B23K 2600

Patent

active

046527214

ABSTRACT:
A method and apparatus for edge contouring and severing a lens such as a contact lens of an elastomeric material such as a silicone elastomer from a workpiece containing the lens. The method most preferably employs two beam focussing means such as laser optics systems situated opposite each other which project a ring-shaped beam of, e.g., 10.6 micron wavelength radiation from a carbon dioxide laser at a workpiece centered between the two beam focussing means. Such a laser beam is preferably directed at both surfaces of a workpiece to fully edge contour and sever a contact lens from the workpiece in a fast and efficient manner.

REFERENCES:
patent: 3419321 (1968-12-01), Barber
patent: 4307046 (1981-12-01), Neefe
patent: 4327277 (1982-04-01), Daly
patent: 4414059 (1983-11-01), Blum et al.
patent: 4455893 (1984-06-01), Astero
patent: 4563565 (1986-01-01), Kampfer et al.

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