Patents Assigned to Sola International Holdings LTD
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Patent number: 6142624Abstract: The present invention relates to novel ophthalmic lens elements and eyewear having wide field of view, low distortion, improved astigmatism correction where required and enhanced eye protection properties. Series of lens elements have steeply curved spherical reference surfaces. The edged lenses of the series have approximately consistent aperture size, shape and hollow depth across a range of common prescriptions.Type: GrantFiled: December 30, 1998Date of Patent: November 7, 2000Assignee: Sola International Holdings Ltd.Inventors: Michael Alan Morris, Colin Maurice Perrott, Simon J. Edwards, Ray Steven Spratt
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Patent number: 5977276Abstract: A cross-linkable polymeric casting composition including an effective amount ofA: an acrylic or methacrylic monomer which provides high rigidity and low colour dispersion (High Abbe number) to the final product;B: a di- or polythio compound;C: a di- or polyvinyl monomer; and optionallyD: a polymerisable comonomer.Type: GrantFiled: November 20, 1997Date of Patent: November 2, 1999Assignee: Sola International Holdings Ltd.Inventors: Huan Kiak Toh, Ian Roger Bateman, David Robert Diggins, Bohdan Grzegorz Cieslinski
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Patent number: 5959761Abstract: A light-transmissible article formed from a polymeric material, which article includes at least one photochromic dye; and a compatible light absorbing material distributed on or within the article; the combination of photochromic dye and compatible light absorbing material is such that the depth of darkening upon activation of photochromic dye is rendered substantially uniform regardless of variations in length, thickness or local changes of surface shape.Type: GrantFiled: September 8, 1997Date of Patent: September 28, 1999Assignee: Sola International Holdings Ltd.Inventors: Colin Maurice Perrott, Kenneth John Pidgeon
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Patent number: 5883169Abstract: Disclosed is a lens wafer suitable for use in preparing a laminated lens which wafer has a coating on at least one surface thereof in the form of a peelable protective film.Type: GrantFiled: April 17, 1996Date of Patent: March 16, 1999Assignee: Sola International Holdings Ltd.Inventors: David P. Spector, A. N. Sunder Ram
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Patent number: 5882556Abstract: A process for preparing a cross-linked polymeric article, which process includes: providing a cross-linkable polymeric casting composition; and a photochromic composition; subjecting the cross-linkable polymeric casting composition to partial cure, such that the polymer reaches or exceeds its point of gelation; contacting the partially cured gelled polymer with the photochromic composition; and curing the gelled polymer.Type: GrantFiled: September 8, 1997Date of Patent: March 16, 1999Assignee: Sola International Holdings Ltd.Inventors: Colin Maurice Perrott, Kenneth John Pidgeon, Helena Kloubek, Ian Michael Threlfall
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Patent number: 5867246Abstract: A progressive ophthalmic lens including a lens surface having: a lower viewing zone providing good optical quality at a predetermined high surface power over a large area of vision; said predetermined power being determined by the viewer's near prescription (R.sub.x) the horizontal fitting position normally being determined by the near pupillary distance of the wearer, and the vertical fitting position normally being determined by the vertical frame midpoint, an upper viewing zone of lower surface power providing an enhanced range of vision for intermediate or greater viewing distances; and a corridor of relatively low astigmatism extending therebetween; wherein the contours of mean surface power and/or surface astigmatism within the lower viewing zone, upper viewing zone and corridor are generally symmetric about a vertical lens meridian as fitted to the wearer.Type: GrantFiled: January 17, 1997Date of Patent: February 2, 1999Assignee: Sola International Holdings, Ltd.Inventors: Simon John Edwards, Eric Barkan, David Howard Sklar, Dimitrios Jack Kris, Mark Thyssen
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Patent number: 5861935Abstract: A series of progressive ophthalmic lens elements, each lens element including a lens surface havingan upper viewing zone having a surface power to achieve a refracting power corresponding to distance vision;a lower viewing zone having a greater surface power than the upper viewing zone to achieve a refracting power corresponding to near vision;a corridor of relatively low surface astigmatism connecting the upper and lower zones, said corridor having a surface power varying from that of the upper viewing zone to that of the lower viewing zone;the progressive ophthalmic tens series includinga first set of lens elements having a base curve(s) suitable for use in providing a range of distance prescriptions for a first category of patient; anda second set of lens elements having a base curve(s) suitable for use in providing a range of distance prescriptions for a second category of patient; each lens element within a set differing in prescribed addition power and including a progressive design, in at least one ofType: GrantFiled: January 10, 1997Date of Patent: January 19, 1999Assignee: Sola International Holdings Ltd.Inventors: Michael Alan Morris, Eric Franklin Barkan, Simon John Edwards, Dimitrios Jack Kris, Anthony Alan Lee, Mark Mattison-Shupnick, Colin Maurice Perrott, Karen Lee Roberts, David Howard Sklar
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Patent number: 5512344Abstract: A button for forming a segment of a multifocal lens the button comprising a first portion composed of a lead oxide-containing glass, a second portion composed of a glass which contains substantially no lead oxide, the first and second portions being adjacent and forming a face of button for machining to a desired shape, and a third portion composed of a glass which contains substantially no lead oxide, the first and second glass portions being fused the third glass portion on a side of the first and second portions remote from the said face of the button.Type: GrantFiled: October 8, 1993Date of Patent: April 30, 1996Assignee: Sola International Holdings Ltd.Inventors: George H. Neal, William C. Kelley
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Patent number: 5502139Abstract: A cross-linkable polymeric casting composition includinga fluorene diacrylate or dimethacrylate monomer; anda comonomer including a polymerisable double bond.Type: GrantFiled: April 20, 1995Date of Patent: March 26, 1996Assignee: Sola International Holdings Ltd.Inventors: Huan K. Toh, Chong M. Kok
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Patent number: 4912185Abstract: A cross-linkable polymeric casting composition including at least polyoxyalkylene glycol diacrylate or dimethacrylate and at least one polyfunctional unsaturated cross-linking agent. The casting composition may be utilized in the manufacture of plastic optical articles such as video discs and ophthalmic lenses.Type: GrantFiled: November 23, 1987Date of Patent: March 27, 1990Assignee: Sola International Holdings Ltd.Inventor: Huan K. Toh
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Patent number: 4838675Abstract: A method for optimizing the performance of an ophthalmic progressive lens having a distance viewing zone, a near viewing zone, and an intermediate zone, and the resulting optimized lens are provided. The surface of the lens to be optimized, which has at least one quantitative performance characteristic, is represented by a mathematical base function which is com=bined with a selected optimization function. The optimization function includes at least one adjustable parameter and may have at least one boundary condition imposed on it along the boundary of a selected subregion of the lens surface. A quantitative merit figure of the combination of the base and optimization functions, which is related to the at least one performance characteristic by a selected merit function, is optimized through the at least one adjustable parameter of the optimization function. Through the optimization, there is obtained an improved surface function which represents the surface of the improved progressive lens.Type: GrantFiled: June 19, 1987Date of Patent: June 13, 1989Assignee: Sola International Holdings, Ltd.Inventors: Eric F. Barkan, David H. Sklar
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Patent number: 4676610Abstract: The disclosure relates to progressive power or multifocal ophthalmic lens and methods and formers for making such lens. The optical power of such lens varies gradually from a near viewing zone to a distance viewing zone. Selected mathematical functions are progenitive of the lens and former shapes, and steps of the methods are characterized by various mathematical functions, and coordinate systems which are constrained to provided the desired transition of optical powers in an intermediate zone of the lens.Type: GrantFiled: July 22, 1983Date of Patent: June 30, 1987Assignee: Sola International Holdings Ltd.Inventors: Eric F. Barkan, David H. Sklar