Method for lathing a lens
AssigneeBausch & Lomb Incorporated
InventorsBuford W. Council, Jr., Lorenzo J. Salvatori, Philip D. Goller, Wayne R. Manning
Life of this patent
Estimating the term…
Abstract
A method of lathing a lens, especially a contact lens, involves attaching the cylindrical blank of lens material to a first block of machineable plastic material, lathe cutting a desired first lens surface in the cylindrical blank, attaching the machined first lens surface of the blank to a second block, lathe cutting to remove the block of machineable plastic material, and lathe cutting a desired second lens surface in the blank. Both the first and second blocks may be adhered to the lens blank with an adhesive curable by ultraviolet radiation, and a two-piece block, composed of a head section and a body section, is disclosed.
Claims4
A method of preparing a cylindrical blank of lens material for lathe cutting a lens therefrom comprising:
- attaching to the lens blank a block of plastic material with an adhesive curable by ultraviolet radiation, said block being transparent to ultraviolet radiation, and transmitting ultraviolet radiation through the block to cure the adhesive.
A method comprising:
- polishing a lathe cut lens surface with a polishing pad including a polishing agent applied thereto but lacking solvent or a liquid suspension for said polishing agent applied thereto;
- and
- subsequently removing residues of the polishing agent from the lens while the lens is hydrated in an aqueous bath, said method avoiding use of a nonaqueous solvent or liquid suspension to remove residues of the polishing agent from the lens.
Dependencies are inferred from the claim text.