Method and apparatus for edge contouring lenses

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

1985-01-03

1987-02-10

Paschall, M. H.

Electric heating

Metal heating

By arc

219121LG, 219121LT, 219121LR, 219121LP, 264 14, 51284E, B23K 2600

Patent

active

046424393

ABSTRACT:
This invention relates to 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.

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patent: 4275288 (1981-06-01), Makosch et al.
patent: 4307046 (1981-12-01), Neefe
patent: 4539463 (1985-09-01), Piccioli et al.
Laser Machining and Welding, N. Rykalin et al., MIR Publishers, Moscow, USSR, Appendix 4, pp. 292-294.

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