Matches 251 - 300 out of 441 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
4866884 Lens grinding methods and apparatus  
A lens grinding machine includes a grinding tool mounted on a tool support, and a lens holder mounted in a tailstock assembly. The lens is positioned for grinding by advancing the tailstock...
4862646 Apparatus and method for production of single element toric lenses of very small proportions  
A system for generating toric optical surfaces having two different radii (or axes) of curvature with accurate centration. A multiplicity of such surfaces for use as lenses are simultaneously...
4856234 Optical lens manufacturing apparatus and method  
A carrier is disclosed for holding an optical lens blank while forming optical surfaces on the blank. The carrier includes a clamp for holding the periphery of the lens blank while exposing a...
4854089 Method of making a rigid gas permeable bifocal contact lens  
A bifocal contact lens is disclosed, having a posterior surface with a base curve, and an anterior surface having a distance vision curve defining a distance vision optical zone and a near vision...
4850152 Apparatus for lapping and polishing optical surfaces  
The workpiece which is moved relative to the tool is processed by a tool configured in the form of a flexible membrane. On the rearward side of the membrane, loading units are arranged with the...
4841680 Inverted cell pad material for grinding, lapping, shaping and polishing  
A polishing pad material is provided with a cellular polymeric layer containing elongated cells normal to the major surfaces of the material, such that the cell openings on the polishing surface of...
4789424 Apparatus and process for optic polishing  
There is disclosed a novel method and apparatus for automatic optic polishing. The apparatus includes a spindle arm rotatable and transversely displaceable which has removably secured thereto a...
4787732 Contact lens and method of making same  
A contact lens is provided for the eye of a patient with a cornea having a central surface. The contact lens includes a posterior surface which includes an innermost or generally flat circular...
4768308 Universal lens polishing tool, polishing apparatus and method of polishing  
A universal polishing tool comprises a rigid cup having a circular rim to which is attached a relatively thin resilient polishing pad. In accordance with a method for using the tool, the tool is...
4760672 Simultaneously grinding and polishing preforms for optical lenses  
An optical surface on a glass preform for an optical lens is simultaneously ground and polished. A glass blank is rotated by a work spindle mounted in an air bearing. A resin bonded diamond cutting...
4749530 Mold for and method of making contact and intraocular lenses  
Molded contact and intraocular lens blanks are lathe cut into the finished lens without demolding and prior measurement of the blank by the use of a hemispherical based mold with at least one key...
4733502 Method for grinding and polishing lenses on same machine  
The method of both the surface grinding, or fining, and the polishing of a lens are accomplished on the same surfacing machine spindle, precisely reproducing the curvature and alignment from fining...
4707949 Method for manufacturing a spectacle-glass for myopes  
A method for manufacturing a spectacle-glass for myopes, starting for simplicity sake from a semi-finished glass, that is a glass having on the inner side, a slight concave hollowing, which...
4686798 Optical blank carrier for lathing lenses and process therefor  
A carrier is disclosed for supporting an optical blank in the chuck of a lathe, for machining the optical blank into a lens. The carrier has a substantially cylindrical body formed of a machinable...
4680998 Toric lenses, method and apparatus for making same  
A unique lens (10) having a peripheral carrier surface (13), a central optical zone (18) providing the toricity required to achieve a given spherical and cyclinder correction that is oriented to a...
4655005 Apparatus and process for dry cutting of plastic optical lenses  
A process and apparatus for dry lens generation of a plastic optical lens includes a chamber structure in which the lens grinding tool and the lens blank holder are positioned. The chamber is...
4653234 Workpiece holder apparatus for surfacing optical lenses  
A workpiece holder apparatus is disclosed for use with a surfacing tool for surfacing optical lenses having a surface of revolution especially afocal ophthalmic lenses. A workpiece holder comprises...
4649670 Methods of end finishing a lightguide fiber termination  
In an apparatus (20) for end finishing an assembly (22) comprising a plurality of lightguide fibers (23--23) positioned between two silicon chips (26--26), a tool carriage (45) is moved past the...
4640587 Method for manufacturing a spectacle lens for myopes  
There is described a method for manufacturing a spectacle lens for myopes the edge thickness of which may be considered as substantial, which comprises starting with a semi-machined product with a...
4619082 Method of manufacturing a contact lens  
A contact lens is manufactured by a method involving machining a first face (2,3) and a reference surface (4) on a blank (1); mounting the blank (1) in a work holder (10) adapted for accurate...
4598502 Method and apparatus for surfacing optical lenses  
A lens holder device is employed having a bell-shaped chamber, at least a portion of the sidewall of the chamber at an open end thereof having a circular section and adapted to accommodate with...
4592684 Method and apparatus for producing aspherical surfaces  
A method and apparatus for producing an aspherical surface, for example, an aspherical optical surface, on a workpiece, on which the workpiece is rotated about a first axis, a cutting tool is...
4584799 Method of forming a convergent lens in a plate of transparent mineral material  
A method is described of forming a circular convergent lens in a plate of transparent mineral material, which involves grinding the lens with a grinding member having a lesser diameter than the...
4580882 Continuously variable contact lens  
A continuously variable multi-focal soft contact lens wherein a continuous optical gradient in a region smaller than the maximum pupil opening is provided. The concave surface is aspheric with a...
4574527 Toric lens generating  
Elliptical error in the generating of toric lenses is substantially eliminated, thereby reducing the time and cost of the production of such lenses. A cup-shaped cutter wheel is swept to cut the...
4573121 Method for determining optimum thickness of ophthalmic lens  
A method for determining the optimum thickness of an ophthalmic lens comprises the steps of applying data indicative of the kind of a lens suitable for a spectacle wearer and the contents of a...
4563916 Dynamically variable oscillating adjustment assembly  
A dynamically variable oscillating adjustment assembly including a frame and a first link means pivotally connected at one end to the frame and an adjustment mechanism positioned intermediate the...
4562018 Method of casting optical surfaces on lens blanks  
This invention is a method of making cast lens blanks with an optical surface on one surface. A cylindrical resinous mold having an optical surface surrounded by an orientation ring present in the...
4553457 Machining a cooled cylindrical optic to compensate for pressure distortion  
A system for, and a method of, replicating the known (i.e., ascertained) operational coolant fluid flow local pressure in an optical surface (such as a mirror surface) of the heat exchanger portion...
4550482 Method of constructing a beam spread lens  
A method of constructing a lens of the type receiving a collimated beam of input radiation for transmitting a narrow sheet of output radiation of substantially uniform intensity over an angular...
4534137 Method for pattern generation and surfacing of optical elements  
A method for generating patterns progressively changing in configuration from circular through eliptical and oval and inclusive of rectilinear traces is effected by constraining a stylus to...
4530139 Method of contouring crystal plates  
A method for batch-contouring crystal plates for frequency adjustment is disclosed. A plurality of plates is secured to a compliant sheet and the sheet is attached to an applicator surface which...
RE31897 Method for the alteration of a lens  
A method for altering a lens whereby a lens is securely bonded to a lens block by a lens adhesive blocking pad having means for accurately aligning the optical center, and optionally the cylinder...
4497144 Method for manufacturing quadric surface  
A working tool having a linear working edge is secured to a tool holding arm which is rotatably arranged about a focus shaft extending in parallel with a Z axis and is slidable linearly in parallel...
4494338 Lens-shaped article or the like and a method and apparatus for the manufacture of same  
A lens-shaped article or the like which has a support frame formed as a unitary structure with the outer periphery of the lens-shaped body, and a method and apparatus for the manufacture of such a...
4464867 Radially adjustable lap  
Disclosed is a convex lap comprising a plurality of polishing elements which are radially adjustable to ensure that the effective radius of the polishing surface remains constant as the polishing...
4460275 Method and apparatus adapted for automatic or semi-automatic fabrication of ultra-precision opthalmic lenses, e.g., contact lenses  
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...
4458454 Methods of shaping contact lens  
Various forms of contact lenses can be produced having improved properties. The surface of the lens to be polished is brought into contact with a polishing compound associated with a flexible (but...
4434581 Apparatus adapted for automatic or semi-automatic fabrication of ultra-precision ophthalmic lenses, e.g., contact lenses  
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...
4419849 Lens processing method and apparatus  
A chucking method and apparatus for processing a lens blank in a manner requiring only a single mounting of the blank to an associated lens block. The lens block is mounted to the convex lens blank...
4409760 Method for the manufacture of lens-like articles and the like  
An apparatus for the manufacture of lens-like articles and the like, in which two work holders are provided in a manner to be movable along a common center axis and rotatable thereabout and...
4409189 Recovery of tungsten from brines  
Tungsten is recovered from alkaline brines by: (1) initial loading of metal values on an 8-hydroxyquinoline-resorcinol-formaldehyde resin, (2) selective desorption of boron, arsenic and sulfur from...
4406189 Method of making lenses with a lenticular cut  
A method of rapidly making lenticular contact lenses having a flange thinner than the optical section of the lens and of uniform thickness regardless of refractive power.
4391621 Method of making lenses having a spherical face  
A lens is formed of a section of glass clad glass rod ground and polished to a spherical shape of radius of curvature equal to that desired of a face of the lens. Remaining leachable cladding glass...
4389819 Glass polishing processes  
A polishing process for mineral and organic ophthalmic lenses involves essentially a first step of mixing cerium oxide powder or zirconium oxide powder with (a) an alkali metal or ammonium salt of...
4375739 Method for manufacturing hyperbolic surface  
An optical lens having a hyperboloid surface is formed by cutting or grinding a workpiece made of glass or plastics while rotating it about its axis, while a cutting or grinding tool having a...
4343116 Processes for finishing glass surfaces  
A method of finishing a glass surface to a close tolerance and a substantially blemish-free state using a moving polishing lap and an aqueous treatment liquid containing inert abrasive particles,...
4267672 Lens processing method  
A chucking method and apparatus for processing a lens blank in a manner requiring only a single mounting of the blank to an associated lens block. The lens block is mounted to the convex lens blank...
4266996 Method and tool for producing centered parts having spherical surfaces  
Parts having centered spherical surfaces are produced by a method and by a tool which seats an inner spherical end of each part on a very accurately generated spherical surface of the tool while a...
4267208 Coating of optical lens for blocking purposes  
Coating of the convex side of an optical lens for blocking purposes by dipping the downwardly facing convex side in a liquid coating material in a can, upwardly withdrawing the lens above the level...
Matches 251 - 300 out of 441 < 1 2 3 4 5 6 7 8 9 >