Raster cutting technology for ophthalmic lenses

Details Raster cutting technology for ophthalmic lenses Raster cutting technology for ophthalmic lenses

2004-08-03

2009-02-24

Cadugan, Erica E (Department: 3726)

Gear cutting, milling, or planing

Milling

Process

C409S080000, C451S005000, C451S011000, C451S041000, C451S042000, C700S187000, C700S193000, C700S194000

Reexamination Certificate

active

07494305

ABSTRACT:
A raster cutting apparatus and method for producing accurately formed, aspheric ophthalmic lenses having a good quality surface finish. The accurate form and good surface finish are obtained by using a substantially spherically shaped cutting tool having a large radius. The methods include utilizing a cutting path which provides substantially constant cutting-force, such as a constant surface-cutting-speed raster pattern.

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International Search Report, Patent Cooperation Treaty, Jul. 12, 2005, 7 pages.

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