摘要:
The invention concerns a process for making a coated optical lens blank free of visible fining lines which comprises: (ix) providing an optical article having at least one fined but unpolished geometrically defined main face; (x) providing a mold part having an internal and external surface; (xi) depositing on said main face of said optical article or on the internal surface of the mold part a requisit amount of a liquid curable coating composition; (xii) moving relatively to each other the optical article and the mold part to either bring the coating composition into contact with the main face of the optical article or into contact with the internal face of the mold part; (xiii) applying pressure to the mold part to spread the liquid curable coating composition on said main face and form a uniform liquid coating composition layer onto the main face; (xiv) curing the liquid coating composition layer; (xv) withdrawing the mold part; and recovering the free of visible fining lines coated optical article.
摘要:
Systems for transferring at least one coating from a carrier to a surface of an optical article which comprise: an optical article to be coated; a flexible carrier bearing at least one coating to be transferred; an inflatable membrane; and a deformable part that is able to match the geometry of a surface of the optical article when a pressure is exerted on the optical article through inflation of the inflatable membrane. Also describes are methods and processes of using such systems; carriers for use in such systems, methods, and processes; and optical articles made using such systems, methods, and processes.
摘要:
Systems for transferring at least one coating from a carrier to a surface of an optical article which comprise: an optical article to be coated; a flexible carrier bearing at least one coating to be transferred; an inflatable membrane; and a deformable part that is able to match the geometry of a surface of the optical article when a pressure is exerted on the optical article through inflation of the inflatable membrane. Also described are methods and processes of using such systems; carriers for use in such systems, methods, and processes; and optical articles made using such systems, methods, and processes.
摘要:
The present invention relates to an improved process or method for transferring a coating onto at least one surface of a lens blank which can be implemented in a short period of time without any risk of deformation of the lens blank.
摘要:
An inflatable membrane apparatus (10) comprising (a) a fluid accumulator (11) having an upper and a lower face and a fluid entrance (12), said lower face being partly formed by an inflatable membrane (14), and (b) a trunconical part (15) projecting outwardly from the lower face of the accumulator whose greater base is closed by at least part of the inflatable membrane (14) and smaller base forms a circular opening, whereby, when pressurized fluid is introduced into the accumulator (11), deformation of the inflatable membrane (14) is guided by the trunconical part.
摘要:
A method for fabricating a Fresnel lens or other lens having a structured surface such as refractive and/or diffractive bi-focal or other multi-focal lenses includes press-coating the structured surface with a low or very low refractive index coating material. The coating is sufficient thick to adequately cover the structured surface so that a smooth coating surface with good optical properties is obtained, for example in the case of a Fresnel structure a thickness greater than 1.5 times and less than 5 times the Fresnel structure height, and is cured in situ. A film, e.g., of PET, PC or PU or a film stack, e.g. a TAC/PVA/TAC film stack is prepared and a heat melting adhesive is applied to the side of the film or film stack to be contacted with the coated structured surface of the lens blank. The film or film stack is then laminated to the cured coating.
摘要:
The invention concerns a photocurable adhesive composition comprising, based on total weight of photopolymerizable monomers and/or oligomers of the composition: 5 to 60 wt % of at least one mono or polyacrylate monomer or oligomer thereof (A); 5 to 50 wt % of at least one thio(meth)acrylate monomer or oligomer thereof (B); and 20 to 50 wt % of at least one aromatic dimethacrylate monomer or oligomer thereof (C); with the proviso that the composition does not contain a brominated monofunctional acrylate.
摘要:
A process for applying a coated or uncoated film onto at least one geometrically defined surface of a lens substrate which comprises the steps of: (a) providing a liquid hot melt adhesive (HMA) composition comprising: 1. at least one HMA base polymer having a glass transition temperature Tg and optionally a melting temperature Tm, with Tg
摘要:
The present invention relates to a process for transferring at least one coating onto at least one geometrically defined surface of a lens substrate to produced a lens substrate coated with at least one functional coating adhering to at least one geometrically defined surface through a layer of transparent adhesive composition.
摘要:
The invention concerns a photocurable adhesive composition comprising, based on total weight of photopolymerizable monomers and/or oligomers of the composition: 5 to 60 wt % of at least one mono or polyacrylate monomer or oligomer thereof (A); 5 to 50 wt % of at least one thio(meth)acrylate monomer or oligomer thereof (B); and 20 to 50 wt % of at least one aromatic dimethacrylate monomer or oligomer thereof (C); with the proviso that the composition does not contain a brominated monofunctional acrylate.