Method of producing spectacle lens

Details Method of producing spectacle lens Method of producing spectacle lens

2005-03-29

2005-03-29

Eley, Timothy V. (Department: 3724)

Abrading

Precision device or process - or with condition responsive...

Computer controlled

C451S042000, C451S043000, C451S057000, C451S058000

Reexamination Certificate

active

06872120

ABSTRACT:
A lens surface shape is created by a near-finish surface forming rough-cutting step of creating a near-finish surface shape analogous to a lens surface shape based on a prescription of a spectacle lens from a spectacle lens base material11by numerically controlled cutting, and a finish-cutting step of creating the lens surface shape based on the prescription of the spectacle lens from the near-finish surface shape by numerically controlled cutting. According to this method of producing a spectacle lens, all kinds of spectacle lenses including an inner surface progressive power lens can be produced with high productivity.A complex curved surface can be mirror-polished by a polishing tool, which includes an elastic sheet41having a curved surface, wherein a workpiece is polished by applying a pressure to the inner surface side of the elastic sheet41, to stretch the elastic sheet41and bring the outer surface side of the elastic sheet41into contact with the workpiece.

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