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RE40152 Injection molded thermoplastic spectacle lens suited for fully automated dip hardcoating  
Plastic injection-compression multi-cavity molding of flash-free improved-cleanliness thermoplastic spectacle lenses ( 16 ) are suitable to be robotically dip hardcoated. Special spring-loaded (...
7332110 Method and device for producing optical part  
An annular insert ( 4 ) is arranged in the optical component molding cavity of a mold to surround an outer periphery of raw material resin in a direction in which the resin is distributed in the...
7326375 Injection compression molding method and injection compression machine of lens  
An injection compression molding method of a lens is provided, where a toggle link mechanism ( 65 ) is actuated to close a molding die ( 50 ) and a movable die plate ( 64 ) is moved to a position...
7255553 Light guide plate mold core and method for manufacturing the same  
A light guide plate mold core ( 1 ) includes a main body ( 13 ) having a molding surface ( 12 ) and a plurality of concavities ( 13 a ) formed at the molding surface. The main body is made of a...
7122137 Device and process for producing optical molded parts from plastic  
A device has a first mold plate mounted rotatably using a shaft, and a second mold plate, between which a cavity is formed. The device further has an apparatus for applying an erecting force to the...
7108811 Process and device for producing moulded parts from plastic  
In a process for producing, in particular, optical moulded parts from plastic, a first mould plate ( 1′ ) is moved in the direction of the second mould plate ( 2 ′) until the mould plates (...
7106528 Method and apparatus for manufacturing large double-sided curved Fresnel lens  
A method of manufacturing a large double-sided curved Fresnel lens. The method includes a machining step (A) of performing ultra-precise three-dimensional machining on an upper mold and a lower...
6929761 Molded hologram apparatus method and product  
Holographic lines are formed directly on products by holding a holographic plate and a block under a lip on a frame and mounting the frame for limited movement within a recess in a mold half. As a...
6896417 Hollow cast article with slit, method and apparatus for production thereof  
In the production of a hollow cast article having a slit, the release of a hollow cast product from a mold is carried out while opening the hollow cast product. In one embodiment, a core provided...
6872335 Method and apparatus for holding a mold assembly and molding an optical lens using the same  
An apparatus and method for holding a mold assembly and molding an optical lens using the same. In one aspect, the present invention provides an apparatus for holding a mold assembly, wherein the...
6858165 Method of manufacturing plastic thin-plate article with protrusions on surface thereof  
A method of manufacturing a diffusion plate for use in a screen plate of projection TV is disclosed. The diffusion plate having a plurality of quadrangular pyramid protrusions almost over one side...
6843940 Method and mold for molding plastic lenses  
A method for making an organic glass lens or lens blank which comprises providing a two-piece mold defining a molding cavity having a vertical axis which is part of a fixed reference system...
6840618 Stress-relieved acrylic optical lenses and methods of manufacture by injection coining molding  
Stress-relieved molded acrylic opthalmic lenses, and injection-coining mold processes for molding stress-relieved plus and minus to high-minus diopter ophthalmic lenses of optically superior...
6829050 Optical device provided with a resin thin film having a micro-asperity pattern and manufacturing method and apparatus of the optical device  
A cylindrical embossment roll whose outer circumferential surface is formed with a micro-asperity pattern is prepared. A substrate is coated with a thin resin film. The substrate is held by a...
6821108 Plastic castings molds  
The invention is concerned with the problem that with known plastic casting moulds, especially those of polypropylene, the lenses produced with these moulds have a slippery surface. The invention...
6814900 Optical attenuator molding method  
A method for molding an optical attenuator having a unitary lens portion and supporting portion includes the steps of: providing a mold having cavity and core elements which together define a space...
RE38617 Method of injection molding plastic lens  
A cavity 22 in an injection molding assembly includes a lower mold insert 21 for shaping a lens convex surface and an upper mold insert 20 for shaping a lens concave surface. When the heated...
6800225 Process and device for the manufacture of mouldings and mouldings manufactured in accordance with that process  
A measured amount of a material that is crosslinkable by impingement of a suitable form of energy, especially UV light, is introduced into a two-part mould of which cavity determines the shape of a...
6790388 Method of injection molding an optical article out of thermoplastic synthetic material  
For each lens molding cycle, the method comprises the following steps: raising the wall of the mold cavity to a heating temperature higher than or equal to the molding temperature of said...
6759182 Manufacturing method and apparatus of optical device and reflection plate provided with resin thin film having micro-asperity pattern  
There is provided a manufacturing method of an optical device having a micro-asperity pattern that has various kinds of accurate three-dimensional shapes and is realized as thin films. A substrate...
6755996 Direct manufacturer of preform for compression molding  
A process for forming a preform for use in compression molding an optical lens is provided. A heated reservoir desirably a thermoplastic extruder is filled with a thermoplastic material. The heated...
6716374 Clamp pressure control method for injection molding process  
An injection-compression molding apparatus includes a stationary mold provided with a nozzle for injecting molten resin, and a movable mold driven by a servo motor. In compressing the resin,...
6705725 Injection compression molding method for optically molded products  
A method of producing an optically molded product of a thermoplastic resin by injection compression molding, the method comprising the steps of: (1) expanding the volume of a cavity more than the...
6703100 Disk-like recording medium and method for producing the same  
A recording medium for information signals including a substrate, a signal recording layer provided on one major surface of the substrate and a clamp member having a positioning unit at its center...
6638451 Plastic casting molds  
The invention is concerned with the problem that with known plastic casting molds, especially those of polypropylene, the lenses produced with these molds have a slippery surface. The invention...
6638450 Method for manufacturing an injection molded thermoplastic ophthalmic lens having an encapsulated light polarizing element  
A method for manufacturing a synthetic resin thermoplastic ophthalmic lens by injecting a thermoplastic material immediately adjacent to each side of a light polarizing wafer situated within a mold...
6592785 Device and method for molding optical components  
An optical component molding device and method is disclosed. The molding device includes a heating section, a heating/pressing section, and a cooling section. A carrying member sequentially conveys...
6500376 Multiple injection compression molding process  
A method of injection molding a layered plastic component includes providing a sealing structure around the periphery of a mold cavity formed between first and second mold halves to contain plastic...
6475410 Method and device for producing contact lens elements and injection mold used therefor  
A method and apparatus for producing a contact lens material having two opposite lens-forming surfaces is disclosed. A first resin mold having a molding surface providing one of the opposite...
6440335 Process for molding thermoplastic lenses and, steeply curved and/or thin lenses produced thereby  
Disclosed are novel molding methods for injection molding thermoplastic lens elements and particularly adapted for the manufacture of steeply curved and/or thin-centered lenses.
6433936 Lens of gradient dielectric constant and methods of production  
Disclosed is a lens of gradient dielectric constant and methods for the production of same. The lens includes an inner core comprising a cured or fused substantially homogenous blend of glass...
6398988 Thin light managing system for directing and distributing light from one or more light sources and method for making optics structures for use in the system  
A rear signal lamp of an automotive vehicle comprising a lamp housing and a curved cover lens for enclosing a thin light managing system. The thin light managing systems includes a plurality of...
6304387 Method of predicting the curvature radius of the microlens  
The invention proposes a method of predicting the curvature radius of the microlens. By adjusting a spin speed of spin coating and exposure energy during a photolithography step, a volume of the...
6290882 Reduced-knitline thermoplastic injection molding using multi-gated non-sequential-fill method and apparatus, with a heating phase and a cooling phase in each molding cycle  
Hard to fill large-surface-area parts and/or thinwalled configurations of optical lenses and reflective optical elements are among the difficult-to-mold thermoplastic products which require...
6287488 Method for injection molding of high quality parts  
A method and apparatus for injection molding of high quality thermoplastic parts is such that a conventional movable mold half is mounted on a movable platen of the injection molding machine, and a...
6284162 Molding method for manufacturing thin thermoplastic lenses  
Disclosed are novel molding methods for manufacturing thin thermoplastic lenses and, in particular, minus ophthalmic lenses that have thickness of about 1 mm or less at the thinnest point thereof....
6234629 Differential thickness contact lens with compensation for differential shrinkage and method of manufacturing same  
A contact lens and a method of manufacturing a contact lens having areas of different thickness, the contact lens being compensated for differential shrinkage during the manufacturing process. The...
6226135 Reflector type prism and reflector type prism forming die  
The bottom surfaces of an entering surface-forming portion 1a for forming a light-entering surface 11a of a reflector type prism 11 and of an emitting surface-forming portion 1b for forming a...
6210610 Method of manufacturing lens, injection mold for molding of lens, and molded lens  
A gate top member 23 is placed to a gate 22 opened toward the circumferential edge of a molding spectacle-lens cavity 13 formed between inserts 11 and 12. The plural gate top members 23 each having...
6158861 Prism ballast type contact lens, method of producing the same, and mold assembly used in producing the lens  
A prism ballast type contact lens having a front and a back surface, a center axis of the front surface being offset from that of the back surface which is a geometric center axis of the lens, such...
6103148 Method for curing a lens-forming fluid  
A method for curing a lens-forming fluid, including exposing the lens-forming fluid to an ultra-violet light, wherein the exposure time is between twenty seconds and thirty minutes, which can...
6099764 Method of lens casting without using a gasket  
An apparatus and method for casting lens without using a gasket that can be used to form all powers and geometric shapes of lenses. An elastomeric strip is used to wrap around the edges of two...
6099763 Method and apparatus for filling a lens-forming device with a curable fluid  
An apparatus and method for forming a lens using a structure having a front mold, a rear mold, and a gasket having opposed ends and defining an axially extending bore in which the front and rear...
6096229 Method of making alignment grooves in an optical connector support member  
A method for making an optical connector support member. The method can be broadly summarized by the following steps: One or more features are partially etched in a monocrystalline substrate to...
6082987 Apparatus for assembling a lens-forming device  
An apparatus and method for assembling a lens-forming structure, the structure having a front mold, a rear mold, and a gasket defining an axially extending bore, including a collet for supporting...
6068906 Mold for making disc substrate, process for producing mold and disc substrate  
A disc substrate molding metal mold apparatus adapted for molding synthetic resin material to carry out molding of disc substrate of an information signal recording medium. This metal mold...
6042754 Continuous extrusion-compression molding process for making optical articles  
The present invention relates to making optical articles such as opthalmic lenses by molding and, in particular, to using a continuous extrusion-compression molding method to make plastic lenses...
6024902 Injection molded paired thermoplastic spectacle lenses suited for fully automated dip hardcoating  
Plastic injection-compression multi-cavity molding of flash-free improved-cleanliness thermoplastic spectacle lenses (16) are suitable to be robotically dip hardcoated. Special spring-loaded (25,...
6015514 Method and metallic mold for producing molded plastic products  
An apparatus and method of producing molded plastic products provides the molded plastic products of high accuracy and with short molding cycle. A resin is placed in a cavity of a mold for forming...
6015512 Extrusion-compression molding of optical articles  
An extrusion-compression molding process is provided for making optical articles wherein a melt shot of optical polymer extrudate is fed to sequentially moving lower dies of a die set including a...
Matches 1 - 50 out of 186 1 2 3 4 >