Abstract: A method for creating a concave section of glass from a glass substrate having flat surfaces includes the use of a grinding wheel and a turntable. The method includes the steps of securing the glass substrates to the turntable. The turntable is then spun to create a turntable axis of rotation. The grinding wheel is rotated about a wheel axis of rotation such that the wheel axis of rotation is perpendicular to the turntable axis of rotation. The grinding wheel and the turntable move relative to each other along the turntable axis of rotation. The glass substrate is ground by the grinding wheel contacting the glass substrate to create the concave section of glass while the glass substrate is rotating about the wheel axis of rotation and moving relative to the turntable.

Abstract: A polishing composition and method for polishing polymer-based surfaces that can be rinsed from the polished polymer-based surface using water so as to leave substantially less polishing residue behind as compared to conventional polishing compositions. Polishing compositions according to the invention include abrasive particles and a rinsing agent dispersed in water. Polishing compositions according to the invention can be used to polish all types of polymer-based surfaces including, for example, organic polymer-based ophthalmic substrates and clear-coat automotive finishes.

Abstract: The invention concerns a process for measuring and/or controlling a polishing process of an ophthalmic element (1) comprising the steps of manufacturing at least two cavities (2, 3) on the surface of the element to be polished, the depth of the first cavity (2) being smaller than the depth of the second cavity (3) operating the polishing process considering the element (1), in order to check that the first cavity (2) is suppressed and that the second cavity (3) is present.

Abstract: An aspect of the present invention relates to a method of manufacturing an eyeglass lens, which comprises a step of conducting polishing processing of a non-optical surface of a semifinished lens, one surface of which is an optical surface and the other surface of which is the non-optical surface, to create an optical surface. The semifinished lens comprises an acrylic coating on an optical surface of a lens substrate, a surface of the acrylic coating having a contact angle relative to water of equal to or less than 90°, prior to the polishing processing, a protective film is adhered through an adhesive layer of the film to the surface of the acrylic coating, and the polishing processing is conducted by polishing a non-optical surface of the lens substrate in a state where the protective film surface is secured in a block jig.

Abstract: The present invention is directed to a method of calibrating drill depth of an ophthalmic processing device. A number of drill cycles are selected for drilling an expected number of holes in a lens blank. The selected number of drill cycles is performed. The drill depth of each consecutive drill cycle varies incrementally. An actual number of locations the drill bit contacted the lens blank during the drill cycles is compared to the expected number of holes. The drill depth is adjusted depending on the compared values. A method of calibrating drill hole size is also disclosed.

Abstract: A magnetically attached spectacle lens wherein magnets are embedded in the rear surface of the lens in a circumferential groove near the periphery of the lens. The magnets are spaced around the periphery of the lens, and are held in the groove by preferably a wicked in cyanoacrylate adhesive. The spaces between the magnets are preferably filled with a light activated potting compound. Prior to installation of the magnets, the inside of the groove is painted, preferably by spraying, with an opaque paint whereby the magnets are hidden from the view of onlookers. During fabrication, after magnet installation, any overspray from the painting step is removed by using a solvent preferably applied by moistened swabs or cloth.

Abstract: A polishing wheel (10) arranged to polish an article. The polishing wheel comprises a hub (12) provided with an axial cavity (18) coaxial with an axis (26). The polishing wheel further comprises a substrate layer (14) being made of an elastomer material affixed to the hub (12) and coaxial with the axis (26). The substrate layer (14) has an outer surface (20) having a substantially symmetrical shape with respect to the axis (26). The polishing wheel (10) further comprises a continuous cover layer (16) affixed to the outer surface (20) and coaxial with the axis (26). The continuous cover layer (16) is made of an elastomer material covering substantially entirely the outer surface (20).

Abstract: Method for mounting an optical lens (10) to be polished on a spindle (20) of a polishing device, the optical lens (10) comprising a first and a second main surface (101, 102), the method comprising: an optical lens (10) providing step (S1), in which an optical lens (10) whose first main surface (101) is to be polished is provided, a mounting step (S2), in which the optical lens (10) is mounted on the spindle (20), wherein, the mounting step (S2) further comprises a support device positioning step (S3), in which a support device (30) is positioned between the spindle (20) and the second surface (102) of the optical lens (10) so as to be rotated by the spindle (20) and to have a contact surface (31) partly in contact with the second main surface (102) of the optical lens (10) that partly extends beyond the second main surface (102) of the optical lens (10).

Abstract: A spherical core type lens grinding device (1) performs an operation wherein a dish-shaped grindstone (8) provided with a spherical grindstone surface (8a) which is equipped with diamond abrasive grains, is pressed against a surface-to-be-ground (7a) of a lens blank (7) to be ground, and wherein the dish-shaped grindstone (8) is rotated and is simultaneously swung, resulting in said surface-to-be-ground (7a) being ground to a spherical surface. In an initial-stage grinding process, grinding is performed at first processing pressure and first rotational speed. In an intermediate-stage grinding process, grinding is performed at second processing pressure and second rotational speed. In a last-stage grinding process, grinding is performed at third processing pressure and third rotational speed. The second processing pressure is a pressure at which the spherical grindstone surface (8a) can bite into the lens blank (7).

Abstract: A method of finishing an optical element includes mounting the optical element in an optical mount having a plurality of fiducials overlapping with the optical element and obtaining a first metrology map for the optical element and the plurality of fiducials. The method also includes obtaining a second metrology map for the optical element without the plurality of fiducials, forming a difference map between the first metrology map and the second metrology map, and aligning the first metrology map and the second metrology map. The method further includes placing mathematical fiducials onto the second metrology map using the difference map to form a third metrology map and associating the third metrology map to the optical element. Moreover, the method includes mounting the optical element in the fixture in an MRF tool, positioning the optical element in the fixture; removing the plurality of fiducials, and finishing the optical element.

Abstract: An eyeglass lens processing apparatus for forming a hole on an eyeglass lens to attach a rimless frame to the lens, includes: a lens chuck that holds the lens; a drilling tool; a designating unit that designates a position of a hole; a unit that measures or inputs an inclined angle of a refractive surface of the lens at the designated hole position; an arithmetic unit that obtains a hole angle with respect to a predetermined reference axis based on the inclined angle; a control unit that controls a positional relationship between the held lens and the drilling tool based on the obtained hole angle to perform a drilling; and an input unit that inputs a modified hole angle based on the obtained hole angle. The control unit controls the positional relationship between the held lens and the drilling tool based on the modified hole angle to perform a re-drilling.

Abstract: A polishing disc for a tool for the fine machining of optically active surfaces, particularly on spectacle lenses as workpieces, comprises a main body which has a center axis and on which there is fixed an intermediate layer which is softer than the main body and on which a polishing agent carrier rests. The intermediate layer has, with respect to the center axis, a radial inner region of substantially constant axial thickness and an adjoining radial outer region. The latter is formed or is fixed to the main body in a particular way so as to prevent the edge of the polishing disc from being imprinted on the machined surface of the workpiece in the form of very fine, scratch-like microstructures. Also proposed is a simple method which can be used to produce such a polishing disc.

Abstract: An eyeglass lens processing apparatus includes: a lens rotation unit rotating a lens; a processing tool rotation unit processing the lens; an axis-to-axis distance changing unit for changing an axis-to-axis distance between the chuck shaft and the processing tool rotation shaft; a lens surface configuration acquiring unit which acquires a front surface curve configuration and a rear surface curve configuration of the lens; a lens outer diameter acquiring unit which acquires an outer diameter of a lens; a calculation unit which calculates a thickness of the lens and calculates a cutting depth of the lens, so that torque applied onto the chuck shaft in rough processing becomes substantially constant, based on the calculated lens thickness and a processing distance from the rotation center of the lens; and a control unit which controls the axis-to-axis distance changing unit in accordance with the calculated cutting depth and for rough processing the lens.

Abstract: Optical polishing pitch formulations include synthetic polymers or other synthetic resins. As alternatives to traditional optical pitches, these materials offer improved stability in use, storage, and processing. In addition, these pitch compositions may be masterbatched and manufactured with precision to ensure superior reproducibility and quality control in polishing performance.

Abstract: Ophthalmic abrasive wheel including a plurality of swarf clearing grooves formed across the cutting surface and having closed profiles such that the swarf clearing grooves do not open to or exit the side of the abrasive wheel. The swarf clearing grooves are spaced around the cutting surface of the wheel and are configured so as to be substantially angled either towards or away from one another.

Abstract: Disclosed is an automatic constant pressure polishing apparatus. The automatic constant pressure polishing apparatus comprises a housing having a hollow section therein, a rubber pad installed in the housing and having superior expansion and contraction characteristics, a pressure fixture having a male screw section, which is formed on an outer peripheral surface thereof in order to press and fix the rubber pad, and a central hole formed at a central portion thereof, a slider screw-coupled into the housing to adjust pressure in the housing according to a rotational degree of the rotating shaft, and a polishing pad installed at a front end portion of the housing.

Abstract: A surface treating apparatus treats a substrate surface by rotating a cylindrical polishing member in a state where the polishing member makes contact with the substrate surface. A polishing liquid is supplied to a polishing liquid passage that is provided in a central portion of the polishing member, and the polishing liquid is supplied to the substrate surface by rotating the polishing member while filtering the polishing liquid by a foam member provided on an outer periphery of the polishing liquid passage. Aperture diameters of the foam member are larger on the side of the polishing liquid passage than on the outside of the polishing member.

Abstract: The optical surface of a lens (21) held and rotated by the rotating shaft (12) of a lathe is cut or ground into an aspherical surface from a direction perpendicular to the axis of the rotating shaft (12) and the axial direction of the rotating shaft (12) while a processing locus (t) which is concentric or spiral about the rotating shaft (12) as the center is formed. In processing, the lens (21) is arranged in a grinding region (20) at a position spaced apart from the turning center (Zo) of the processing locus (t).

Abstract: A method for machining a face (1) of an optical object (6), includes providing a machine tool which itself includes a bed (1) for locating an object to be machined. The bed (1) has a receiving surface (3) that is angularly adjustable about an axis perpendicular to the receiving surface (3). A spindle (8) is suitable for rotating a machining tool (9) about an axis essentially parallel to the receiving surface (3) of the bed (1) and is suitable for moving the machining tool (9) translationally in a plane essentially parallel or perpendicular to the receiving surface (3) of the bed (1).

Abstract: A display device including a holding device that can be placed on the head of a user, an image generating module fixed to the holding device and generating an image, and a multifunction glass that is fixed to the holding device and has a coupling in area and a coupling out area. The image produced is coupled into the multifunction glass via the coupling in area, guided in the multifunction glass to the coupling in area, and extracted via the coupling out area, in such a way that the user can perceive the coupled out image superimposed on the surroundings when the holding device is placed on the head of the user. The coupling in area has a Fresnel structure causing a folding of the beam path when the image is injected into the multifunction glass, said structure having an imaging property.

Abstract: A pair of eyeglasses includes: a frame provided with at least one rim presenting an internal bezel; and a lens mounted in the frame, the lens presenting a front face, a rear face, and on its edge face, an engagement peripheral ridge presenting a rear flank, situated beside the rear face of the lens and a front flank situated beside the front face of the lens, the front and rear flanks being engaged in the internal bezel. The front flank of the engagement peripheral ridge presents continuity of at least first order with the remainder of the front face. The edge face of the lens presents a rear shoulder or foot, and in that the radial height of the engagement peripheral ridge considered between the peak of the peripheral ridge and the foot varies along the periphery of the lens.

Abstract: Methods for edging optical articles comprising two main faces, at least one of which being coated with an outermost layer comprising fixing the optical article to a chuck with a holding pad that adheres to both the optical article and the chuck, wherein the surface of the holding pad contacting the optical comprises an adhesive material; and edging the optical article with an edging device; wherein prior to fixing the optical article to the chuck, at least one temporary layer of an organic material is formed onto said outermost layer of the optical article, the organic material of the temporary layer comprising at least one organic compound having a fluorinated functional moiety and at least one linking functional moiety capable of establishing at least one intermolecular bond or interaction with the adhesive material of the holding pad. Optical articles obtained via these methods.

Abstract: A method and system for pre-blocking ophthalmic lenses for processing including articulation edging is described. Lens blanks are blocked in this method without prior knowledge of lens prescription variables or frame size and shape dimensions. This blocking can be done at a remote mass production manufacturing facility. The pre-blocked lenses would then be inventoried at the lens manufacturing location. No de-blocking and re-blocking is required between the surfacing, for those lens blanks requiring surfacing, and edging processes so the lens blanks remain on their blocks from start to finish. If surfacing is required, both surfacing and edging are performed on the same machine with no interruptions between the two processes. Machine readable indicia on the Lens-Block Assemblies for Lens Blank species identification is described. Pre-blocking of finished uncut lenses for edging using articulation edging is also described.

Abstract: An apparatus comprising an optical window transmits both an excitation beam to a sample and scattered light from the sample which is within the angular range of the collection optics. Scattered light from the sample outside the angular range of the collection optics is re-directed back to the sample by reflection from one or more surfaces of the apparatus. As a result, the magnitude of scattered light collected is increased.

Abstract: In a method for producing optical elements, material on a blank (20) is removed with an abrasive liquid jet (32). The liquid jet (32) has a jet thickness (d) which is greater than the dimension (D) of the blank (20) in a plane (E) perpendicular to the direction (R) of the liquid jet. Predefined removal profiles in aspherical form can be achieved by the liquid jet (32) being guided onto the blank (20) at different angles of incidence (?).

Abstract: An adhesive tape, interposed between a lens to be processed and a holding jig when the lens is mounted in a lens processing machine, which has a plastic foam with holes opening in an adhering surface and an adhesive layer formed on the adhering surface of the plastic foam, and having a suction function for providing suction to the adhering surface together with elastic restoration after the plastic foam is deformed under compression. The adhesive tape of the present invention also exhibits sufficient shear adhesive strength in relation to a lens that has received surface processing and can realize precise lens processing.

Abstract: A manufacturing method of a spectacle lens improving a manufacturing yield and a production efficiency is provided. The manufacturing method of the spectacle lens in which necessary information for a frame machining of a spectacle lens (progressive-power lens 20) including spectacle rim related information is obtained, and both surfaces of a convex surface and a concave surface are edge/polish machined from a spectacle lens blanks.

Abstract: The present invention is directed to a method of calibrating drill depth of an ophthalmic processing device. A number of drill cycles are selected for drilling an expected number of holes in a lens blank. The selected number of drill cycles is performed. The drill depth of each consecutive drill cycle varies incrementally. An actual number of locations the drill bit contacted the lens blank during the drill cycles is compared to the expected number of holes. The drill depth is adjusted depending on the compared values. A method of calibrating drill hole size is also disclosed.

Abstract: A method for blocking and/or deblocking an optical lens (100) on a heat conducting holding unit (200) comprising an upper assembling surface (210) comprising the steps of: a) providing first layer consisting of an adhesive tape (330) on the upper assembling surface (210) of the holding unit; b) providing a second layer consisting of a layer (310 comprising a thermoplastic material arranged on said adhesive tape (330); c) providing the optical lens (100) with a third layer consisting of an adhesive tape (320) arranged on the bottom surface (120) of said optical lens; d) placing the optical lens (100) with the third layer (320) on the second layer (310) consisting of a layer comprising a thermoplastic material when the thermoplastic material is soften or melted. A method for deblocking said optical lens (100) thanks to heating the holding unit (200).

Abstract: A polishing machine for optical elements includes: —a spindle arranged to rotationally drive an optical element; —a polishing tool mobile relative to the spindle; —a front face provided with a door enabling the access to the spindle and to the polishing tool. The polishing tool is mounted on a body which is rotationally mounted on sliding members by way of a first axis, the sliding members being substantially perpendicular to the front face.

Abstract: A method of polishing objects using an apparatus comprised of a rotary positioning device comprising a turret; a base mounted on the turret; a drive wheel connected to a rotatable shaft, the drive wheel having a perimeter, and the rotatable shaft disposed in a housing. The polishing wheel assembly may include an elongated arm including a proximal end joined to the base, and a distal end; a rotatable polishing wheel supported at the end of the elongated arm; and a polishing belt comprising an inner surface and an outer surface, the inner surface engageable with the perimeters of the drive wheel and the polishing wheel. The method is comprised of contacting the outer surface of the polishing belt to a contact region of the surface of the object; and controlling the contact region by rotating the elongated arm around the turret axis.

Abstract: A method of finishing an optical element includes mounting the optical element in an optical mount having a plurality of fiducials overlapping with the optical element and obtaining a first metrology map for the optical element and the plurality of fiducials. The method also includes obtaining a second metrology map for the optical element without the plurality of fiducials, forming a difference map between the first metrology map and the second metrology map, and aligning the first metrology map and the second metrology map. The method further includes placing mathematical fiducials onto the second metrology map using the difference map to form a third metrology map and associating the third metrology map to the optical element. Moreover, the method includes mounting the optical element in the fixture in an MRF tool, positioning the optical element in the fixture; removing the plurality of fiducials, and finishing the optical element.

Abstract: A polishing machine for lenses with at least one first polishing spindle having a polishing axis (K) and a tool holder disposed on the first polishing spindle for a first polishing disc designed as a tool, further comprising at least one first workpiece spindle having a rotary axis (C) and a workpiece holder disposed on the first workpiece spindle for a lens, wherein the workpiece holder and the tool holder are disposed so as to be movable in translation in the direction of a telescoping axis (Z) disposed parallel to the polishing axis (K) and in the direction of a translation axis (X) disposed at right angles to the rotary axis (C).

Abstract: The present invention provides a slurry composition and method for polishing organic polymer-based ophthalmic substrates. The slurry composition according to the invention includes an aqueous dispersion of particles of diatomaceous earth and, optionally, particles of abrasives selected from alumina, zirconia, silica, titania and combinations of the foregoing. Slurry compositions according to the invention can be used to polish all types of organic polymer-based ophthalmic substrates, but are particularly useful for polishing organic polymer-based ophthalmic substrates having an index of refraction greater than 1.498 because they remove such materials at a greater efficiency than conventional slurry compositions.

Abstract: A method is disclosed, whereby a reduced wear of the polishing tool and a reduced duration for the polishing process may be achieved and also free form surfaces and non-rotating workpieces may be polished. The above may be achieved whereby the surface of the tool actually in contact with the workpiece lies off the tool axis. The invention further relates to a method for polishing a surface of a workpiece, via a tool rotating about a tool axis, whereby the workpiece, at least in one region of the workpiece surface has a contacted surface which is part region of a surface for machining, which for its part is at least part of a polishing surface of the tool, whereby the tool axis intersects the polishing surface.

Abstract: A method for blocking an optical lens (10) comprising a moving step in which the optical lens (10) is moved from a first reference position (P1) to a second reference position (P2), so as to be in contact with a blocking material (14), the blocking material (14) being in a molding block (16), the second reference position (P2) being a function of the first reference position (P1), wherein the method further comprises an orienting step in which the optical lens (10) is oriented in the first reference position (P1) and placed on a plurality of pre-located pins (18) which are vertically translated into a preset position (Z1, Z2, Z3), so that, when the optical lens (10) is placed on the plurality of pre-located pins (18), the optical lens (10) is oriented in the first reference position (P1) where the prism of the optical lens (10) corresponds to a desired prism (?f, ?f, Zf).

Abstract: A method of manufacturing a ferrule assembly. The method including first and second polishing operations. The first polishing operation including polishing only the end face of a ferrule of an assembly. The second polishing operation including polishing only the optical fiber of the assembly.

Abstract: The method for making an optical lens according to the present invention is characterized in comprising: a optical lens preform fabrication step of fabricating a optical lens preform which comprises a first curved portion which serves as an optically functioning part and which is on one side, a flat surface portion which is formed on the opposite side to the first curved portion, and paired beveling surfaces which are formed on the both sides of the flat surface portion; a drawing step of drawing a optical lens preform 40 until the optical lens preform 40 has obtained a desired outer diameter; and an optical lens fabrication step of cutting thus drawn optical lens preform and accordingly fabricating an optical lens. With this making method, since there are paired beveling surfaces disposed, it is possible to suppress a drawing-induced distortion.

Abstract: A device includes a measurement element for automatically measuring optical locating or identification characteristics of an ophthalmic lens, a cutting-out element for cutting out an ophthalmic lens and including an element for lens clamping, and a receiver/transfer element that receives an ophthalmic lens and transfers it in at least three transfers between at least four distinct positions, a first between a loading or unloading position for the lens and a measurement position in which the ophthalmic lens is presented aligned with the measurement element, a second transfer between the measurement position and an intermediate position, and a third transfer between the intermediate position and a cutting-out position, presenting the lens for being clamped by the clamping element of the cutting-out element. The transfer element includes a second transfer element arranged to receive a plurality of ophthalmic lenses simultaneously and to perform the second transfers of the ophthalmic lenses in turn.

Abstract: A method for polishing lens surfaces, in which a) prior to the polishing process, for the purpose of determining an abrasion profile, at least one point of a workpiece is polished by means of a polishing tool to be used, using at least one pre-defined parameter; b) the polishing abrasion thus achieved on the workpiece side is determined by measuring; c) on the basis of the abrasion profile, at least one parameter is set for a subsequent polishing process, and the polishing process is completed at least partially. A method for polishing lens surfaces, in which the polishing point is places at least outside of the workpiece centre at a distance a from a plane which is tensioned by the tool spindle axis and the workpiece spindle axis.

Abstract: In the case of a method and an apparatus for manually aligning ophthalmic spectacle lenses (5), in particular semifinished products of progressive lenses, the spectacle lens is held for the purpose of machining the free side of the spectacle lens by a first holder via a connecting material situated therebetween. The holder is inserted into a cutout of a retaining device, the free side being machined. After machining of the free side of the spectacle lens, the first holder is inserted into a cutout of an adapter part that is provided with markings. Thereafter, the spectacle lens is aligned with the aid of the markings of the adapter part, the spectacle lens being held in a second holder via a further connecting material situated therebetween. The second holder is subsequently inserted in the retaining device. Finally, the first holder is removed from the spectacle lens together with the adapter part and the connecting material.

Abstract: The invention relates to a method for machining and estimating an optical lens which is designed as a semi-finished product, with a pre-finished form of a first side and a second side to be machined, in which a pre-specified form of a surface of the second side to be machined is estimated, wherein prior to estimating the pre-specified form of the surface of the second side, an actual form of the surface of the first side is measured using measuring means and is incorporated into the estimation of the pre-specified form of the surface of the second side.

Abstract: A polishing device for polishing optical lenses having a tiltable base part for directly or indirectly receiving a polishing plate, which base part is connected to a polishing spindle having an axis of rotation D in order to be rotationally driven, wherein a rotary joint for supplying a polishing agent is provided, which rotary joint is at least partly arranged opposite said polishing spindle, relative to the base part, and a coupling element is provided by means of which the rotary joint can be detachably push-fitted or clipped onto a polishing spindle. A method for polishing selected zones of aspherical lenses which are not rotationally symmetric using a polishing plate which is guided by a polishing spindle so as to be tiltable, wherein during polishing, a polishing agent is introduced between said polishing plate and the lens via a rotary joint arranged between said polishing spindle and said polishing plate.

Abstract: A tool for polishing and fine-grinding optically active surfaces in precision optics has a main body which can be attached in a rotationally fixed manner to a tool spindle of a machining machine. A guide element is arranged concentrically in the main body and is mounted such that it can be displaced axially therein. A machining disk is replaceably attached to the outer end of the guide element. The main body is rigidly connected in a rotationally fixed manner, over the full displacement travel, to the guide element mounted such that it can be displaced axially therein, and in that the machining disk is rigidly fixed in a non-tiltable manner on the guide element.

Abstract: A polishing head for spectacle surfaces with a basic body for attachment to a polishing spindle, with an elastic supporting part for a polishing film which is or can be attached, wherein the supporting part comprises a recess with a wall surface and a depth t, and the polishing film comprises at least one hole, wherein the hole forms an access to the recess, wherein the polishing film comprises in addition to the hole at least one further hole, which is arranged in the area of an edge of the recess and is at a radial distance a from the hole, wherein the further hole forms an outlet channel for polishing agent from out of the recess or the wall surface is raised at least over one section of the depth t, and/or with reference to a circumference, at least in segments in relation to the rotational axis D at an angle ?, and/or the supporting part comprises at least one groove which is provided in the front side with a groove base and a depth t1, which is connected to the recess and/or the supporting part comprise

Abstract: In an eyeglass lens processing apparatus for beveling a peripheral edge of an eyeglass lens, if the high curve lens processing mode is selected by the mode selector, a computing unit acquires a high curve bevel path for locating the bevel apex on a front surface curve of the eyeglass lens or for locating the bevel apex at a position shifted by a predetermined quantity from the front surface curve toward the rear side on the basis of the edge position information acquired by the edge position detector, thereby providing high curve beveling data for the rear surface beveling grindstone, or for the front surface and rear surface beveling grindstones; and a beveling controller bevels the peripheral edge of the eyeglass lens by the rear surface beveling grindstone, or by the front surface and rear surface beveling grindstones on the basis of the high curve beveling data.

Abstract: A method and apparatus for improving the performance of rimless spectacle lenses. An abrasive wire is provided for polishing bore holes which are drilled in lenses. The abrasive wire includes a wire substrate with abrasive particles embedded along its length. The wire and particles are dimensioned for threading through the bore hole and allowing space to perform a soft-filing operation. By polishing the micro cracks formed during drilling, propagation leading to lens failure which arises from spectacle use can be reduced.

Abstract: The optical surface of a lens (21) held and rotated by the rotating shaft (12) of a lathe is cut or ground into an aspherical surface from a direction perpendicular to the axis of the rotating shaft (12) and the axial direction of the rotating shaft (12) while a processing locus (t) which is concentric or spiral about the rotating shaft (12) as the center is formed. In processing, the lens (21) is arranged in a grinding region (20) at a position spaced apart from the turning center (Zo) of the processing locus (t).

Abstract: A cup attaching apparatus for attaching a cup to an eyeglass lens, comprises: a lens mount on which the lens is to be mounted; at least three support pins provided on the lens mount to support the lens when a rear refractive surface of the lens is brought in contact with the support pins; a holding unit adapted to hold the support pins so that a supporting plane defined by the support pins is inclinable; a lens clamp for clamping the lens in cooperation with the lens mount when the lens is mounted on the lens mount; at least three presser pins provided on the lens clamp to clamp the lens when a front refractive surface of the lens is brought in contact with the presser pins; and a locking unit adapted to keep the supporting plane defined by the support pins in a substantially horizontal position when the lens is not clamped between the lens mount and the lens clamp.

Abstract: The invention is directed to a method for finishing alkaline earth metal fluoride optical components and to the alkaline earth optical elements produced using the method. In particular, in the last polishing step, the method of the invention uses a colloidal silica polishing slurry having containing silica particles having a particle size of <500 nm. Additionally, after colloidal silica polishing, the method using a megasonic cleaning step with a high pH detergent cleaning solution to remove any silica residue on the polished optical component. The optic resulting from use of the method has a polished and unetched surface roughness of less than 0.5 nm; a surface roughness of less then 0.6 nm after polishing and etching; and a step height of less than 6 nm.