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WO/1997/013173A1 |
A monocentric, multivision contact lens (10) having a single optical axis (15) and an anterior side (24). A first spherical vision surface (12) is disposed on a first portion of the anterior side and has a first radius of curvature (R2) ...
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WO/1997/010923A1 |
A conformable tape for bonding a lens block to ophthalmic lens blanks is provided. The tape comprises a polymeric backing and a pressure-sensitive adhesive. In a first preferred embodiment the surface of the backing is a blend of an olef...
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WO/1997/010924A1 |
The present invention provides thermoplastic ophthalmic lens blocking compositions that have many advantages over traditional metal alloy materials. Preferred compositions comprise a homopolymer or copolymer of epsilon-caprolactone, have...
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WO/1997/010925A2 |
An automatic polishing machine (14) for polishing aircraft windows (12) uses pressurized air to create a suction to hold the polishing unit (20) on the aircraft (10), creates a suction to automatically pick up a polish pad (196), which i...
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WO/1997/006922A1 |
A shape control method comprising the steps of applying a voltage between an electrically conductive grindstone (2) and an electrode (4) spaced from the grindstone (2) while allowing a conductive liquid (7) to flow between the grindstone...
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WO/1997/000155A1 |
A lapping tool for localised optical polishing of a workpiece, the tool having a flexible working surface and being characterised by means for selectively varying the pressure applied, in use, on the workpiece by different regions of the...
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WO/1996/012590A1 |
A blocking technique and apparatus are used to mount a partially finished lens (20a) or other component to an arbor (30), which is useable to hold the partially finished lens (20a) for subsequent machining or mechanical operations. The b...
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WO/1996/003256A1 |
A machine tool (1, 227) with a spindle (27, 229) which extends parallel to Z-direction, is rotatable about an axis of rotation (29, 231) which runs parallel to the Z-direction, and is provided with a holder (33, 235) for a workpiece (35,...
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WO/1995/023684A1 |
A process of preparing a lens (1) using a de-blocking step to remove the lens from a wax mount (7) is described. For the de-blocking step the wax is only partially dissolved so that the lens remains associated with the wax but can be eas...
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WO/1995/020466A1 |
A system is disclosed for the grinding of spectacle le ns blanks to produce spectacle lenses which are finished on both sides and on the edge. It comprises: at least one station (4) for grinding lens surfaces, with a tool (31) for grindi...
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WO/1995/018392A1 |
A method of manufacturing a diffractive surface comprising: rotating a surface to be cut at a rate W > 1,500 RPM; translating a cutting tip T at low speed V where V < 1.2 mm/minute; and cutting the surface with the cutting tip T.
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WO/1995/013904A1 |
Front and rear lenses (10 and 15) of a composite eyeglass lens are laminated together by holding the front lens (10) in an X, Y adjustable stage (27) on a laminating axis (35), holding the rear lens (15) in a predetermined position relat...
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WO/1995/011108A1 |
A blocking system for supporting a lens blank having a posterior surface and a reference surface includes a block having a forward extension with a cylindrical side wall and a front surface complementary to the posterior surface of the l...
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WO/1995/004634A1 |
Clip-on sunglasses (30) and an apparatus for custom cutting the clip-on sunglasses. The system includes a holder (56) which assists in positioning the sunglasses on the system. The sunglasses include a pair of lenses (402) interconnected...
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WO/1994/027782A1 |
A device for shaping spectacle lenses has at least one shaping station for shaping the edge and/or a surface of the spectable lens and a multiaxis positioning unit with a gripping member which grips the spectacle lens and introduces it i...
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WO/1994/025887A1 |
A contact lens (30) having a smooth surface (55, 65) is made through the use of a computer implementing a spline approximation of corneal topography (145). Piecewise polynomials approximating the corneal topography (145) have equal first...
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WO/1994/025220A1 |
Apparatus (10) for grinding glass to form optical elements, especially prisms. The apparatus (10) has an improved mounting for grinding wheels (36). The finishing wheel (30) which can be used for the critical final grinding of the workpi...
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WO/1994/009946A1 |
A base lens blocking system comprises a blocking member (200) formed of a flange (202) with a rearward directed shank (204) received in a collet (232) of a spindle (236), preferably, a dead length, recessed collet. The front surface of t...
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WO/1994/008788A1 |
In a method for manufacturing ophthalmic, telescopic, microscopic, etc. lenses, the use of a radiation (e.g., UV or visible light) curable adhesive (2) formulation containing a predominant amount of an acrylic capped organic prepolymer; ...
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WO/1994/007685A1 |
An improved method for generating a toric surface on a molding tool for forming contact lens molds comprises: (a) providing a tool which comprises an elongated body and a molding portion at one end of the tool, wherein the molding portio...
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WO/1994/006598A1 |
A method and apparatus for protecting removable markings (12) on an optical lens (10) during grinding thereof to a desired prescription. A mask (18) is placed over the markings prior to application of an adhesive tape (20), to which a lo...
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WO/1994/004957A1 |
A combined grinding and marking-out former for lenses for eye glasses of a type where the lenses themselves have holes, slits or similar slots for fixation elements for parts of the frame including a disc shaped element (1), which on bot...
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WO/1994/002286A1 |
A method of processing a lens (40) and mechanisms for use in the method are disclosed. In particular a lens blank (40) or a lens block (20) having a structured surface (30) are disclosed. The structured surface (30) is preferably provide...
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WO/1993/016842A1 |
A machine for generating, by grinding, any optical or ophtalmic lens surface made of organic or mineral glass, comprising a frame (2), a lens support (3) and a grinding wheel support (4) movably mounted on the frame (2), means (11, 12, 1...
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WO/1993/014434A1 |
A contact lens (1) provided with a front curve (2) formed by a plurality of annular curved surfaces (F¿1?, F¿2? .....) for distant vision and a plurality of annular curved surfaces (N¿1?, N¿2? .....) for near vision, which curved sur...
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WO/1993/006967A1 |
A process of removing flash from a molded silicone intraocular lens (10) includes a step of tumbling the lens body in a tumbling media (24). The tumbling media includes a mixture of .5 mm diameter glass beads and 1.0 mm diameter glass be...
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WO/1993/001024A1 |
The description relates to a process for making a rimmed spectacle lens in which a lens which is finished on one side and is not yet rimmed to a predeterminable disc shape, i.e. a 'blank', with only one finished effective surface, is mad...
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WO/1992/009655A1 |
A lens blocking material composition contains 80-90 weight percent of an ethylene derived hydrocarbon polymer, 10-15 weight percent of a thermoplastic aliphatic hydrocarbon resin and 1-3 weight percent of an ethylene/vinylacetate copolymer.
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WO/1992/008614A1 |
Novel lower temperature hot melt adhesive and coating composition that melts at temperatures less than 190 °F (about 87.8 °C). This composition has a sufficient modulus to bind ophthalmic lenses to metal blocks during grinding processe...
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WO/1992/007688A1 |
A tool (17) for use in forming an eyeglass lens (10) is formed from plastics material in place of the conventional cast metal. The tool (17) is used on the conventional polishing machine which moves in a plane generally parallel to the l...
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WO/1992/000832A1 |
There is provided a lens generating apparatus and method for generating a surface on a lens blank, or other workpiece, of a wide range of shapes utilizing rotary movement of the components without a linear way system. The lens generating...
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WO/1991/014536A1 |
A machine for finishing the surface of a lens (12) including a lap holder (30) moved orbitally in a first plane, a lens arm support (76) having a lens holder (14), the lens arm support (76) being oscillated in a second plane perpendicula...
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WO/1991/011292A1 |
An arrangement for controllably removing material from an effective surface (31) of a workpiece (32) includes a mounting member (11) which is mounted on a support (10) for movement relative thereto at least in and opposite to a predeterm...
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WO/1990/011859A1 |
Described is a process for machining workpieces to shape, in which, in order to produce, to a high degree of precision and surface finish, a workpiece surface with any curvature, the tool (3) and workpiece (1) are moved relative to each ...
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WO/1990/005605A1 |
A lathe and a method of using the lathe are disclosed for forming an aspheric surface on a workpiece. The workpiece (12) is mounted to a holder (10) that is rotatably carried by the spindle (8), headstock (6) and bed (4) of a lathe (2), ...
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WO/1990/002630A1 |
A method and system (11, 12) for generating a lens by grinding a lens blank (101) with a tool in a working position calls for a diamond tool (18) to be disposed only angularly, the lens being moved in an X, Y relationship so that the rel...
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WO/1989/009680A1 |
Process and device for polishing the surface of an optical component by means of a polisher (12) carried by a support (24) pivotally mounted at the end of a robot arm (10) and comprising means for uniformly distributing the action of the...
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WO/1989/007508A1 |
Method of abrasive machining of the surface of parts (10) placed in the casing (4) involving creation of a pressure of the abrasive instrument (15) against the parts (10) being machined and bringing about their mutual movements while add...
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WO/1988/000506A1 |
An apparatus and method for in situ concave base curve detection which is especially useful in the lathe. The apparatus and method utilize a laser beam (33) and a photo-diode detector (46) to effect a precise detection of the vertex (14)...
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WO/1987/005247A1 |
The apparatus includes a support (18) for a lens blank (21), a pin-carrying member (55) spaced, in use, from the lens blank for engagement with a mounting button (90) and a feed conduit (7) for feeding molten alloy into the space between...
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WO/1986/001598A1 |
A contoured transparency (37) such as an aircraft windshield or canopy, and a method for making it, that provides reduced optical distortion for a pilot seating beneath it. The transparency (37) is configured to have a tailored thickness...
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WO/1985/004829A1 |
A machine for aligning and attaching partly-worked lens blanks (15) to a block (2) so that the remainder of the blank can be machined. The machine comprises a vee-shaped holder (6) for supporting the block (2) with its axis vertical abov...
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WO/1985/001237A1 |
A lathe for cutting an aspherical surface on a workpiece, such as a contact lens blank, comprises a headstock (2) mounted for linear reciprocating movement relative to a radius cartridge (9) having a tool post (10) for mounting a cutting...
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WO/1984/002672A1 |
A method for generating patterns progressively changing in configuration from circular through elliptical and oval and inclusive of rectilinear traces is effected by constraining a stylus to movement along mutually orthogonal axes, by ge...
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WO/1983/003993A1 |
Apparatus for feeding workpieces (37, 38) to the collet (3) of a lens lathe comprises a loading device (12) and a magazine (10) for containing a plurality of workpieces (37, 38). The magazine (10) has an opening (11) at one end through w...
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WO/1982/001149A1 |
Machines for turning and polishing contact lenses. A drawback experienced with known machines for this purpose is that vibration created by a prime mover, e.g. an electric motor, is transmitted to a driven rotatable support for a lens. T...
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WO/1981/001533A1 |
A cutaway pad for surfacing lenses with grinding or polishing slurries which flow into and along the cuts for distribution across a lens surface worked thereover. The heretofore pad floppiness is relieved with a continuous film backing (...
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WO/1980/002431A1 |
Conformable, multi-layered tape for bonding fusible metal alloy to ophthalmic lens blanks. The tape comprises a polymeric backing layer, a pressure-sensitive adhesive on one surface of the backing layer, and a non-tacky adhesion-promotin...
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WO/1979/000285A1 |
A machine for smoothing and/or polishing lenses has a holder (8) which is carried on a slide (24). The slide is guided for movement in two mutually perpendicular directions, both of which are perpendicular to a main axis (27) of the mach...
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WO/1979/000082A1 |
A method for forming a plurality of optical surfaces on an optical lens precursor, desirably a "soft" contact lens button or blank, to yield a lens adapted for proximate or intimate contact with an eyeball and defined by at least one pos...
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