METHOD AND DEVICE FOR FORMING CONTOUR OF RIM OF LENS

摘要

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.