Abstract: A method for injection molding of a weld line free minus power lens element comprises injecting a melt of thermoplastic material at a temperature higher than a glass transition temperature (Tg) of the thermoplastic material in an initial molding cavity delimited by two facing mold inserts, wherein the melt of thermoplastic material comprises at least one UV absorber. During the injecting, the two facing mold inserts are moved toward one another to define a final molding cavity whose volume is less than that of the initial molding cavity. After cooling and disassembling of the two facing mold inserts, the weld line free minus power lens element is recovered. One of the two facing mold inserts comprises a flat surface facing the initial molding cavity, thereby to form a flat surface on one side of the weld line free minus power lens element.

Abstract: A medical implant includes a first component having a surface and a plurality of electrical contacts and a second component having a surface and a plurality of electrical contacts. Each contact of the first component contacts an assigned contact of the second component in an electrically conducting manner. A seal is disposed between the two surfaces for sealing the contacts. The seal and the two surfaces are formed of a thermoplastic material. The seal is fused to the two surfaces for sealing the contacts and the seal is meltable so as to separate the two components from one another. A method for producing a medical implant is also provided.

Abstract: Provided herein are methods of molding thermoplastic polymers into optical elements. The optical elements in the form of cylindrical discs, semi-finished lens blanks or finished lenses are compression molded at high temperature typically above thermoplastic polymers softening temperature and under high pressure. The semi-finished lens blanks and finished lenses are molded using front and back glass molds inside a mold assembly which reshapes the cylindrical discs that are either previously molded or cut out from thick slab. Also provided are methods for producing single vision and progressive addition lens prescriptions.

Abstract: In manufacturing a contact lens, a contact lens mould arrangement in which the engagement between the mould halves is unconstrained and at least one mould half is sufficiently pliable or flexible that during the curing of the contact lens composition at one mold half may move or flex relative to the other to define a post-cure mould cavity of smaller volume than the precure mould cavity and during which the curvatures of the first and/or second mould surfaces are allowed to change provides a significantly more efficient manufacturing process and enables one mould half to be readily utilized as a blister cup for contact lens packaging.

Abstract: An optical component has a small-volume section and a large-volume section, wherein said optical component is a single-piece injection-molded component with the exception of one region in the large-volume section, said component being supplemented, in the region in the large-volume section, by an add-on to the optical component.

Abstract: An intraocular lens and a method of constructing the intraocular lens are described. The intraocular lens is implanted in a human eye to treat conditions of the eye. The intraocular lens includes a central deformable optic and an annular ring coupled to the deformable optic. The intraocular lens is made by subjecting the deformable optic to compressive forces that reduce the optical power of the deformable optic, and then molding the annular lens to the deformable optic while the deformable optic is undergoing the compressive forces. Once the compressive forces are released, the deformable optic stresses the annular ring along a radial axis of the deformable optic when the intraocular lens is in a natural, unstressed state. The stress or tension between the deformable optic and the annular ring keep the deformable optic from developing deformities that cause visual aberrations.

Abstract: The disclosed embodiments include a system and method for manufacturing a lens. In one embodiment, the system includes a lens mold. According to the embodiment, the lens mold contains a part cavity and a material flow path fluidly coupled to the part cavity and a lens material inlet. The system also includes a heat transfer insert. According to the embodiment, the heat transfer insert includes an insert surface positioned adjacent to a part surface of the cavity, a sealed fluid inlet, a sealed fluid outlet, and a conformal fluid conduit that extends from the sealed fluid inlet to the sealed fluid outlet.

Abstract: A method for changing a shape of a surface of an optical element by particle irradiation includes: modelling the problem of determining a resulting change of the surface shape of the optical element from a control variable; determining a predefinition for the control variable of the particle irradiation from a predefined desired change of a surface shape of the optical element by ascertaining an extremum of a merit function; and radiating particles onto the surface of the optical element with a locally resolved effect distribution corresponding to the determined predefinition for the control variable, for the purpose of producing local surface changes at the surface of the optical element. Ascertaining the extremum corresponds to the solution of an Euler equation. The Euler equation defines an integral operator. The eigenvalues of the integral operator are determined, and the predefinition is a linear combination of a finite number of eigenfunctions of the integral operator.

Abstract: A molding method for a composite material by disposing a reinforcing base material within a cavity of an openable/closable molding die, injecting resin into the cavity and curing the resin. In particular support member is caused to penetrate a reinforcing base material and is disposed such that at least one end portion of the support member projects from the reinforcing base material. Next, the reinforcing base material and the support member are disposed within a cavity of a molding die, the molding die is closed, at least one end portion of the support member is brought into contact with wall surfaces of the molding die that form the cavity. Finally, resin is injected into the cavity from an injection port of the molding die while a state in which the at least one end portion is brought into contact with the wall surface is maintained.

Abstract: A method of fabricating an optical assembly includes positioning an optical structure between a first portion of a mold tool and a second portion of the mold tool and providing a transparent liquid optical material into a first cavity of the mold tool and into the second cavity of the mold tool while the optical structure is positioned between the first portion of the mold tool and the second portion of the mold tool. The first cavity is defined by the first portion of the mold tool and the second cavity is defined by the second portion of the mold tool. The liquid optical material is cured to form the optical assembly.

Abstract: A semi-finished ophthalmic lens for formation of a plurality of different finished ophthalmic lenses requiring reduced amounts of lens material to be removed for formation of the finished ophthalmic lenses and reduced rates of departure of a surfacing tool and methods of making the same. Lens material is reduced by providing first and second surfaces that have different optical powers, the second optical surface having a second curve that approximates second optical surfaces of a plurality of finished ophthalmic lenses at coordinates at which lenses of the plurality of finished ophthalmic lenses have maximum thicknesses.

Abstract: A molded resin product for use with an image forming apparatus includes: a base portion formed of a resin material; a positioning portion provided on the base portion; and a movable member formed by injection molding so as to be movable relative to the base portion. When the molded resin product is connected to a connection part, the positioning portion positions the molded resin product and the connection part relative to each other, and the movable member is contactable to a contact portion of the connection part.

Abstract: Disclosed in this specification is a casting cup assembly comprising frontcurve and basecurve molds which of which includes a ring that circumscribes the respective concave and convex mold surface. When the casting cup is assembled, the rings align and minimize de-centering and tilting of the concave and convex mold surfaces which, in turn, reduces edge defects.

Abstract: A method is provided for inspecting at least one aperture of a component with curable material and an inspection system. At least a portion of the curable material is injected into the aperture. The curable material conforms to at least a portion the aperture and subsequently cures and forms a mold of at least a portion of the aperture. The mold is removed from the aperture. At least a portion of a geometry of the mold is compared to at least a portion of a geometry of a reference model for the aperture using the inspection system.

Abstract: The present invention provides a coated optical element including an optical substrate and a primer layer that is formed by cationic polymerisation of a coating composition containing an effective amount of an epoxy monomer and a vinyl ether monomer. The optical element may be an ophthalmic lens.

Abstract: An optical lens has a beam angle within 29-46 degrees, and includes: an output light region including a first output light surface, a second output light surface around the first output light surface, a buffer surface connecting the first and second output light surfaces, and an outer surface around the second output light surface; an incident light region including a planer incident light surface and an inner surface, the planer incident light surface opposing the first and second output light surfaces, the inner surface around the planer incident light surface and opposing the outer surface, the planer incident light surface and the inner surface connected to each other and forming a slot denting toward the first output light surface; and a mounting portion around and extending outside with respect to the output light region and the incident light region.

Abstract: There are provided a lens, a method of fabricating the lens, and a light scanning unit. The lens includes a lens portion having an effective optical surface, and a gate-side flange portion between the lens portion and a gate-side end of the lens. If the lens is disposed between two polarizers configured to polarize light linearly in perpendicular directions and is illuminated in an optical axis direction, interference fringes are generated on the lens, and peripheral interference fringes of the interference fringes extend continuously from the gate-side end and are longer than the gate-side flange portion.

Abstract: A thin type injection molding skin manufacturing apparatus in which a mold movable part moves to be separated from a mold fixing part at a time of taking out a skin to open a mold, may include a holder part cavity for molding a holder part formed integrally with the skin, which is formed inside the mold fixing part and a fixing part slider capable of elastically pressing the holder part molded in the holder part cavity installed on the end of the holder part cavity, and as a result, the fixing part slider presses and holds the holder part molded integrally with the skin when the mold movable part moves to be separated from the mold fixing part.

Abstract: Method for manufacturing an optical lens in which coating solution curing conditions are satisfied and a coating solution is cured. The coating solution curing conditions include the angle of the axis of an optical lens substrate with respect to the horizontal direction falls within a predetermined angle range, and a second condition that the optical lens substrate rotates around the axis at a predetermined rotational speed. The predetermined angle range is between a maximum inclination angle of the axis at which the peripheral edge of a lens surface is positioned at the highest position of the lens surface, and a maximum inclination angle of the axis at which the peripheral edge of the lens surface is positioned at the lowest position of the lens surface. The predetermined rotational speed is a speed at which the coating solution applied to the lens surface is held in a coating position.

Abstract: When an optical element is produced by sandwiching a resin between a pair of molds, the resin is cured while a mold is kept in contact with the resin until the temperature of the resin reaches a gel point. Throughout the process, a load cell monitors pressure exerted to the mold. After detection of a state in which the pressure exerted to the mold is a negative pressure, the resin is cured while the position of the mold is controlled so that the pressure exerted to the mold is increased to a predetermined positive pressure and thereafter the positive pressure is maintained.

Abstract: There is provided a projection apparatus using an oblique projection optical system, which generates little reflection loss by providing a linear Fresnel lens at an incident surface in the case where the apparatus is used as a linear system, wherein said linear Fresnel lens makes total reflection of image light, and is capable of obtaining total surface property with good brightness in a region with small incident angle onto a screen, by using a total reflection Fresnel lens and a refraction Fresnel lens in combination. In addition, total surface property with further good brightness can be obtained by using a plurality of projection image display apparatuses in the same projection apparatus.

Abstract: A plastic lens 1 has a lens 2 that effectively functions as a lens at a center and an annular flange 3 that does not act as a lens along a circumference of the lens. A gate 4 serving as a flow channel through which molten plastic is to be poured during molding is formed on a circumference of the flange. The gate is cut and taken away at an angle of inclination so as to include a point of intersection between the gate 4 and the circumferential flange 3, whereby a circumferential flange having a given thickness or more is formed.

Abstract: The present invention relates to light flux controlling member (140) formed by injection molding, light emitting apparatus (120) having light flux controlling member (140), surface light source apparatus (100) having light emitting apparatus (120), and a display apparatus having surface light source apparatus (100). Light flux controlling member (140) includes light control emission surface (141) configured to control light distribution of light emitted from light emitting element (130), and back face (142) opposite to light control emission surface (141). Light flux controlling member (140) is formed by injection molding by an overlap gate scheme, or by combination of the overlap gate scheme and a side gate scheme. Therefore, on back face (142) of light flux controlling member (140), there remains gate remnant (147) in such a manner to be in contact with an outer rim.

Abstract: A method for making a spectacle lens includes joining a mold and a sealing ring. The mold has an integrated block piece and a mold shell made by primary shaping and the sealing ring has a first end face, a second end face, a peripheral seal, an opening disposed on the first end face configured to receive a mold, and a flexible membrane on the second end face. A polymerizable material is introduced into the mold cavity with the aid of a pump action of the flexible membrane of the sealing ring. The flexible membrane of the sealing ring is fixed in a desired surface shape and the polymerization is carried out. The mold is removed with a cast-on spectacle lens blank.

Abstract: A silicone contact lens has a radial cross-section of the inner face, the rim portion contour of which is convex between a point of inflection and the outer edge. For its manufacture, a silicone precursor is brought between a female and a male mold and is polymerized, and the polymerized contact lens is released from the mold by means of a liquid swelling same.

Abstract: A method includes the steps of: providing a substrate; providing a tool having, on a replication side, a plurality of replication sections, each replication section defining a surface structure of one of an optical element(s), the tool further including at least one contact spacer portion, the contact spacer portion protruding, on the replication side, further than an outermost feature of the replication sections; aligning the tool with a feature of the substrate and bringing the tool and a first side of the substrate together, with replication material between the tool and the substrate, the contact spacer portion contacting the first side of the substrate, and thereby causing the spacer portion to adhere to the first side of the substrate, thereby producing a substrate-tool-assembly; dislocating the substrate-tool-assembly to a hardening station; causing the replication material to harden at the hardening station; and separating the tool from the substrate with the hardened replication material adhering to

Abstract: There are provided a lens, a method of fabricating the lens, and a light scanning unit. The lens includes a lens portion having an effective optical surface, and a gate-side flange portion between the lens portion and a gate-side end of the lens. If the lens is disposed between two polarizers configured to polarize light linearly in perpendicular directions and is illuminated in an optical axis direction, interference fringes are generated on the lens, and peripheral interference fringes of the interference fringes extend continuously from the gate-side end and are longer than the gate-side flange portion.

Abstract: A plastic lens includes: a lens body which has a first surface, a second surface opposite to the first surface, a circumferential surface interconnecting the first surface and the second surface, and a central optical axis along which the first and second surfaces are arranged, the first surface having a curved surface portion and a stepped surface portion surrounding the curved surface portion; a first flash that is located at the stepped surface portion and that surrounds the central optical axis; and a second flash that is located at the stepped surface portion and that surrounds the first flash.

Abstract: A mold set includes: a first mold and a second mold placed so that they sandwich an optical material and face each other; and a first spacer and a second spacer provided between the first and second molds, wherein: the first spacer secures an interval between the first and second molds at a first temperature achieved in a process of pressurizing the optical material; the first spacer shrinks in a mold opening-closing direction more greatly than the second spacer while the first temperature is changing to a second temperature achieved in a process of cooling the optical material; and the second spacer secures the interval between the first and second molds at the second temperature.

Abstract: In manufacturing a contact lens, a contact lens mould arrangement in which the engagement between the mould halves is unconstrained and at least one mould half is sufficiently pliable or flexible that during the curing of the contact lens composition at one mold half may move or flex relative to the other to define a post-cure mould cavity of smaller volume than the pre-cure mould cavity and during which the curvatures of the first and/or second mould surfaces are allowed to change provides a significantly more efficient manufacturing process and enables one mould half to be readily utilized as a blister cup for contact lens packaging.

Abstract: A method of making an ocular lens device (and resulting lens device) from a polyolefin copolymer material having a crosslinking component, wherein the material is processed to remove unwanted reaction byproducts that can contribute to reduced transparency of the polyolefin copolymer material in the ocular environment of the eye.

Abstract: A lens plate includes a transparent substrate wafer, and a plurality of lenses and spacers that are formed of a single portion of material on the transparent substrate wafer. An assembly includes a first lens plate that includes a first transparent substrate wafer, a plurality of first lenses and a plurality of spacers, the first lenses and spacers being formed of a single portion of material on said first transparent substrate wafer. The assembly also includes a second lens plate that includes a second transparent substrate wafer and a plurality of second lenses formed thereon, each of the plurality of second lenses corresponding to a respective one of the plurality of first lenses. The lens plates are aligned such that each of the plurality of first lenses aligns with the respective one of the plurality of second lenses, and the lens plates are bonded to one another.

Abstract: In a resin molded lens 20 of an interior illumination lamp which includes inserting openings inserting seesaw type switch knobs, gates G and GI for a resin molding are formed so as to be installed at inner side surfaces of the inserting openings when the resin molding is performed by molds D1 and D2, and protrusions 20T having heights higher than heights of gate traces G2 generated by the gates G and G1 are formed in the vicinity of gate traces G2.

Abstract: 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 establishing a cavity thickness of greater than a thickness of an article to be molded while the die is closed. After injecting a molten resin into the cavity, the molten resin is sealed in the cavity and the toggle link mechanism (65) is actuated to advance the movable die plate (64) toward a fixed die plate (61), the relative position of a rear die plate (62) and the movable die plate (64) is made constant at a position where extension of a tie bar (63) becomes a predetermined value, and the molten resin is cooled for a predetermined time after completion of pressurizing the resin.

Abstract: An apparatus for manufacturing a micro lens array, wherein lenses having various standards are easily manufactured by forming a micro lens array by adjusting a vacuum condition in a vacuum chamber. The apparatus including: a vacuum chamber including a vacuum space therein; a vacuum unit for forming a vacuum inside the vacuum chamber; an upper frame disposed inside the vacuum chamber and to which a substrate is installed on a lower surface of the upper frame; an elevator for ascending and descending the upper frame; a lower frame disposed below the upper frame; a master plate disposed on the lower frame and includes a plurality of molding grooves on an upper surface of the master plate; and a heater installed to a side of the master plate to heat up the master plate.

Abstract: A fluidic variable focal length optical lens has a sealed housing having a first fluidic chamber filled with a first fluidic medium and a second fluidic chamber filled with a second fluidic medium, the first and the second fluidic chamber being separated from each other by an elastic membrane, wherein the first and the second fluidic medium have different refractive indices, and a deformator configured to deform the membrane laterally within a pump zone, thereby laterally displacing the first fluidic medium from the pump zone to a lens zone and the second fluidic medium from the lens zone to the pump zone, so that the membrane also deforms in the lens zone and changes a focal length of the lens zone along a normal direction.

Abstract: The invention provides a method of moulding a vision correction lens from a transparent resin. The resin is introduced into a mould cavity, the sides of which cavity which correspond to the front and rear surfaces of the lens being formed by two sheets, at least one of which is flexible. The amount of resin in the cavity is adjusted to deform the flexible sheet(s) so that the shape of the lens defined by the sheet(s) will provide a desired power, and the resin is then cured. The sheets can be transparent, and a user can look through them as the amount of resin is adjusted, to ensure that the lens is of the desired power. Further, the amount of resin in the cavity can be adjusted to accommodate changes in the refractive index of the resin as it cures.

Abstract: A method for manufacturing an optical waveguide includes: step A of forming a first resin layer 23 by allowing a first liquid-state resin to flow to be extended in a manner so as to bury and enclose cores 22; step B of forming a second resin layer 25 by allowing a second liquid-state resin having a viscosity higher than that of the first liquid-state resin to flow to be extended on the first resin layer 23, after or while the first resin layer 23 is heated; and step C of forming an over-cladding layer 26 by curing the first resin layer 23 and the second resin layer 25.

Abstract: A vehicular lamp includes a vehicular component part that is molded by charging molten resin into a cavity defined by a first die that has a mirror surface-molding portion and a semi-gloss surface-molding portion and a second die that is movable relative to the first die and cooling the molten resin. The vehicular component part includes a mirror surface-formed portion having a mirror surface that is formed by the mirror surface-molding portion and a semi-gloss surface-formed portion having a semi-gloss surface that is formed by the semi-gloss surface-molding portion. A step surface is provided between the mirror surface and the semi-gloss surface of the vehicular component part. The semi-gloss surface-formed portion is protruded on a first die side relative to the mirror surface-formed portion.

Abstract: In a molding apparatus in which upper and lower dies are held in a bearing, there are provided pipes for introducing N2 gas used for controlling temperatures of balls of the bearing, whereby difference in temperature between the guide member and the upper and lower dies is controlled. With this structure, it is possible to prevent generation of an excessive compressive force between the upper die and the lower die and the bearing, to thereby prevent breakage of the dies. Further, it is also possible to prevent formation of gaps between the upper die and the lower die and the bearing, to thereby mold an optical element excellent in accuracy of an optical axis.

Abstract: A method of producing an optical element, in which a first and a second die are cooperated with each other so as to press-mold a material in order to produce an optical element including a lens portion, the first die has a circular cross-sectional shape, and the second die defines therein an interior space having a polygonal cross-sectional shape with respect to the direction of die-fastening, the first die is adapted to enter into the interior space of the second die in the direction of die-fastening in the interior space so to press-mold the material in order to form the lens surface while the material is bulged out through gaps between the first die and the second die around the lens surface whereby forming protrusions. An optical element and a mold assembly for an optical element are also provided.

Abstract: Provided is a method for producing a plastic lens, wherein, in molding a plurality of plastic lenses having different optical surface shapes simultaneously in a single mold 50, by designing cavities 3a and 3b such that each of the plastic lenses to be molded has the same volume, a plurality of plastic lenses having different optical surface shapes can be molded simultaneously in a single molding die without impairing the molding accuracy, and an injection compression molding apparatus used for such method.

Abstract: Injection molding of a part having a nonuniform thickness is provided. One disclosed embodiment of an injection molding device includes one or more side walls, a first mold surface intersecting the side walls and being stationary with respect to the side walls, and a second mold surface intersecting the side walls so as to define with the side walls and the first mold surface a cavity configured to receive a metered amount of injected molten thermoplastic material. The second mold surface is moveable toward the first mold surface in such a manner that a first end of the second mold surface moves a larger physical travel distance toward the first mold surface than does a second end of the second mold surface during a molding process.

Abstract: There are provided a lens, a method of fabricating the lens, and a light scanning unit. The lens includes a lens portion having an effective optical surface, and a gate-side flange portion between the lens portion and a gate-side end of the lens. If the lens is disposed between two polarizers configured to polarize light linearly in perpendicular directions and is illuminated in an optical axis direction, interference fringes are generated on the lens, and peripheral interference fringes of the interference fringes extend continuously from the gate-side end and are longer than the gate-side flange portion.

Abstract: A first lens having a first bottom surface and a first top surface at opposite sides thereof; and a first supporter having a first supporting surface and a second supporting surface at opposite sides thereof, the first supporting surface being flat, the second supporting surface being in contact with the first bottom surface, the first supporter being made of transparent material, and a refraction index of the first supporter being different from a refraction index of the first lens. A lens assembly array and method of making the lens assembly array are also provided.

Abstract: In a method for manufacturing a lens, a substrate which has a recess in a first surface thereof is provided. A sacrificial material is provided in the recess which has shape in accordance with a first desired lens surface. A lens material is applied to the substrate and to the sacrificial material and cured so that the lens material has a shape in accordance with the first desired lens surface, and then the sacrificial material is removed.

Abstract: A mold set includes: a first mold and a second mold placed so that they sandwich an optical material and face each other; and a first spacer and a second spacer provided between the first and second molds, wherein: the first spacer secures an interval between the first and second molds at a first temperature achieved in a process of pressurizing the optical material; the first spacer shrinks in a mold opening-closing direction more greatly than the second spacer while the first temperature is changing to a second temperature achieved in a process of cooling the optical material; and the second spacer secures the interval between the first and second molds at the second temperature.

Abstract: An exemplary method for making a lens array having many lenses includes the follow steps. A light pervious substrate including a supporting surface is firstly provided. Secondly, a molten molding material is applied on the supporting surface. Thirdly, a pressing mold including many molding parts is provided, each molding part including a molding cavity for molding the lens. Fourthly, the pressing mold is pressed on the molten molding material. Fifthly, the molten molding material is half-cured, thereby forming a half-cured molding material. Sixthly, the half-cured molding material is pressed by the pressing mold. Seventhly, the half-cured molding material is fully cured to form each lens in each molding cavity. Finally, the pressing mold is removed from the light pervious substrate to form the lens array.

Abstract: A system and method for providing photochromic segmented multifocal optical lenses. A latex primer formulation is provided for effectuating adhesion of a surface casting composition onto a lens having a photochromic coating. The method provides efficient, cost effective production of durable photochromic segmented lenses, via secure adhesion of a surface casting layer onto a photochromic substrate while maintaining desirable optical characteristics. A composite optical lens is advantageously formed having a photochromic base lens, a primer composition bonded to a convex surface of said base lens, and a cured casting composition bonded to said primer composition layer. The cured casting formulation includes a segment region to impart multifocal qualities onto the resultant composite optical lens.

Abstract: A method for manufacturing an optical disk having a middle layer on a substrate includes the steps of coating an ultraviolet curing resin over the substrate, irradiating ultraviolet rays to the ultraviolet curing resin and prepolymerizing the ultraviolet curing resin, and forming the middle layer by pressing a stamper against the prepolymerized ultraviolet curing resin, irradiating ultraviolet rays to the ultraviolet curing resin and thus curing the ultraviolet curing resin.