# US 8,784,160 B2 · Method for manufacturing spectacle lenses according to a prescription > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,160 B2 - Document ID: US8784160B2 - Status: Granted - Kind: B2 - Application number: 12/994,971 - Filed: 2009-06-08 - Published: 2011-04-21 - Granted: 2014-07-22 - Earliest claimed: 2008-06-26 - Assignees: Satisloh AG - Applicants: Frank Breme - Inventors: Frank Breme - Web page: https://patentgrep.com/patent/US8784160B2 ## CPC - B24B 13/0057: {Deblocking of lenses} - B24B 9/146: {Accessories, e.g. lens mounting devices} - B24B 41/061: {axially supporting turning workpieces, e.g. magnetically, pneumatically} - B29D 11/00009: {Production of simple or compound lenses} - B29D 11/00865: {Applying coatings; tinting; colouring (printing, marking or copying processes B41M; identification in general G09F3/00; producing decorative effects in general B44C; positioning or marking of lenses B24B13/0055)} - B29D 11/00942: {where the lens material is mounted in a support for mounting onto a cutting device, e.g. a lathe, and where the support is of machinable material, e.g. plastics} - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) ## Abstract A method for manufacturing spectacle lenses includes the steps of: providing a lets blank having a first face that possesses a final curvature and is coated with an antireflection coating as an outer layer, a second face, and an edge; blocking with a blocking material the lens blank with its first face on a block piece; processing the blocked lens blank on the second face and to obtain a processed lens; deblocking the processed lens from the block piece; and applying on top of the first face antireflection coating of the processed lens a top coating selected from at least one of hydrophobic, oleophobic or dust repelling coatings. ## Claims ### Claim 1 A method for manufacturing spectacle lenses according to a prescription, comprising the steps of: (i) providing a lens blank having a first face, a second face opposite said first face, and an edge between said first face and said second face, said first face possessing a final curvature and being coated with an antireflection coating as an outer layer, (ii) blocking with the aid of a blocking material the lens blank on a block piece, wherein said first face of the lens blank faces said block piece, (iii) processing the blocked lens blank on said second face to obtain a processed lens, (iv) deblocking the processed lens from said block piece, and (v) applying on top of said antireflection coating on said first face of the processed lens a top coating selected from a group comprising at least one of hydrophobic, oleophobic or dust repelling coatings. ### Claim 2 (depends on 1) The method according to claim 1, wherein in between steps (i) and (ii) a protection layer is applied on top of said antireflection coating on said first face of the lens blank, said protection layer having a surface energy higher than that of said top coating, and wherein said protection layer is removed in between steps (iv) and (v) from said antireflection coating on said first face of the processed lens. ### Claim 3 (depends on 2) The method according to claim 2, wherein said protection layer is applied on top of said antireflection coating on said first face of the lens blank by a thermal evaporation process. ### Claim 4 (depends on 3) The method according to claim 3, wherein said protection layer is removed from said antireflection coating on said first face of the processed lens by plasma-etching. ### Claim 5 (depends on 4) The method according to claim 4, wherein step (iii) comprises the following substeps: machining of the blocked lens blank to give said second face a macrogeometry according to the prescription, fine machining of the blocked lens blank to give said second face the required microgeometry, cleaning the blocked lens blank that has been machined and fine machined, vacuum coating of the blocked lens blank to provide an antireflection coating and a top coating including at least one of hydrophobic, oleophobic or dust repelling coating on said second face, and edging of the blocked lens blank to give said edge the required geometry so that the processed lens is ready for insertion into a spectacle frame or a spectacle holder. ### Claim 6 (depends on 4) The method according to claim 4 further comprising: processing the blocked lens blank on said edge to obtain a processed lens. ### Claim 7 (depends on 5) The method according to claim 5 further comprising: spin or dip coating of the blocked lens blank in order to provide said second face with a hard coating, or a primer, or a primer and a hard coating. ### Claim 8 (depends on 1) The method according to claim 1, wherein step (iii) comprises the following substeps: machining of the blocked lens blank to give said second face a macrogeometry according to the prescription, fine machining of the blocked lens blank to give said second face the required microgeometry, cleaning the blocked lens blank that has been machined and fine machined, and vacuum coating of the blocked lens blank to provide an antireflection coating. ### Claim 9 (depends on 8) The method according to claim 8 further comprising: spin or dip coating of the blocked lens blank in order to provide said second face with a hard coating, or a primer, or a primer and a hard coating, providing a top coating comprising at least one of hydrophobic, oleophobic or dust repelling coating on said second face, and edging of the blocked lens blank to give said edge the required geometry so that the processed lens is ready for insertion into a spectacle frame or a spectacle holder.