Method and apparatus for edge contouring lenses

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

B - Operations, Transporting

23

K

327/1.5

B23K 26/00 (2006.01) B23K 26/073 (2006.01) B24B 9/14 (2006.01) B29D 11/00 (2006.01)

Patent

CA 1245299

METHOD AND APPARATUS FOR EDGE CONTOURING LENSES 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 focusing 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 focusing 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.

497465

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