Abstract: A device for processing ophthalmic lenses, which has at least one processing station for processing an edge and/or a surface of the ophthalmic lens and a multiaxial positioning unit, which has a gripping unit, which grips the ophthalmic lens and inserts it into a respective processing station and removes it therefrom. The gripping unit is provided with a plurality of vacuum grippers which are controlled by a control unit for applying a vacuum.

Abstract: A spectacle lens edge grinding machine includes a machine frame and at least one grinding wheel connected to the machine frame. A rotatable spectacle lens holding shaft is fastened to the machine frame. The spectacle lens holding shaft is at least radially displaceable relative to the grinding wheel. A spectacle lens is secured to the spectacle lens holding shaft for grinding with the grinding wheel. At least one abutment is provided for contacting a spectacle lens having been ground to have a desired spectacle lens contour. A transducer for measuring at least one actual value of the spectacle lens contour relative to the at least one abutment is provided. A computer for controlling the spectacle lens edge grinding machine is provided, wherein the computer includes a memory in which nominal values of the spectacle lens contour are stored. The computer compares the at least one actual value to the nominal values in order to determine a deviation from the nominal values.

Abstract: An apparatus for processing edges of ophthalmic lenses with a gripping device for the ophthalmic lens. The gripping device grips the ophthalmic lens in such a manner that the edge to be processed in accessible, with a turning the gripping device with the gripped ophthalmic lens turns about an axis of rotation. A tool is held in a support and is brought into contact with an edge area of the ophthalmic lens to be processed for the processing procedure. The tool is a lathe tool, with the support being conveyed by a control unit in at least one direction during a rotation of the gripping device corresponding to a prescribed shape of the ophthalmic lens.

Abstract: An apparatus for peripheral grinding of a lens has at least one CNC-control device for grinding of the lens blanks according to a selected contour of the lens to be produced from the lens blank. The CNC control device has at least one grinding wheel, at least one rotatable holder for a lens blank, at least one input device for inputting the optical specifications of the lens to be produced, and a controller for controlling grinding of the lens blank according to the selected contour. At least one manipulation device for receiving and positioning the lens blank according to the optical specifications is provided. An opto-electronic detecting device for detecting markings of the lens blank is provided. The detecting device is arranged in the vicinity of the manipulation device. A first control unit, controlling the detecting device, and a second control unit, controlling the manipulation device, cooperate with one another for precisely positioning the lens blank on the holder of the grinding machine.

Abstract: A process for measuring forward and rearward three-dimensional curves and the thickness at the circumference of a contour-ground eyeglass lens by means of a computer-controlled eyeglass lens edge grinding machine. As the corrective lens is being ground, the rotation of the corrective lens is interrupted when a measurement point is reached, and the corrective lens is shifted axially relative to the grinding disk away from the center section and toward the edges of the grinding disk until the forward and rearward edges at the circumference of the corrective lens touch the tracing device. The path or the time consumed in moving from the center section to the point of contact with the tracing device is recorded, and the measured values are stored in the computer, the shaft halves holding the corrective lens rotate further, until the next measurement point is reached, when a measurement is again taken.

Abstract: A device for parallax-free centering of an eyeglass lens blank and for application of markings and optionally a holder before insertion of the eyeglass lens blank into an eyeglass edge grinding machine has a stage for the eyeglass lens blank. An electric drive is connected to the stage which is moveable in an upward and downward direction by the electric drive. A depressor for holding the eyeglass lens blank on the stage is provided. The depressor allows for lateral movement of the eyeglass lens blank in a support plane of the stage. The depressor is moveable in the upward and downward direction. A first proximity detector is operatively connected with the electric drive and with the depressor for positioning at a predetermined height the eyeglass lens blank held between depressor and stage.

Abstract: System for grinding eyeglass lenses with at least one grinding disk, a rotatable holder for an eyeglass lens blank, a device to control the grinding process in accordance with pre-determined optical values and/or a predeterminable outline of a glass lens, a CNC controlled manipulator to insert an eyeglass lens blank in the holder in an exact position, and an input device for the decentration values for the predetermined outline in reference to the optical center of the eyeglass lens. The utilization of the manipulator eliminates the difficult and time-consuming centering of the eyeglass lens blank by hand so that a plurality of eyeglass lens grinding machines can be loaded by a single manipulator.

Abstract: A process, a block or sucker, and an apparatus for machining the edge and optionally the optical surfaces of eyeglass lenses. The block or sucker is of circular shape and has a diameter which, at least in some areas, extends beyond the dimensions of the finished outline of the eyeglass lens. The block or sucker is attached to one major surface of the eyeglass lens blank during the machining operation. The block or sucker is inserted in a holder of a device for machining the edge of the eyeglass lens blank. The edge of the eyeglass lens is machined in accordance with the prescribed outline. The block or sucker may be machined at least in certain areas down to the outline of the eyeglass lens itself, whereafter the block of sucker is detached from the completely machined eyeglass lens and disposed of. Prior to edging the eyeglass blank, the optical surface may also be machined using the same block or sucker.

Abstract: Eyeglass lens edging machine with coaxial shaft halves to hold and rotate an eyeglass lens, an edging tool located radially to the eyeglass lens to form a notch or groove at the circumference of the eyeglass lens or to bevel the edge of the eyeglass lens contour and a device for controlled radial and for controlled or unconstrained axial guidance of the edging tool in accordance with the contour of the eyeglass lens and its three dimensional curve.

Abstract: A method and apparatus for applying a strip to the planar contour-prepared edge of a lens. The beginning of an endless strip is connected to the edge of a lens. A transverse perforation is introduced into the strip at a distance from the strip beginning that corresponds to the circumference of the lens. The lens is then rotated, and the strip is restrained, at a location thereof behind the perforation when viewed in the direction of movement of the strip, in such a way that the strip tears at the perforation to form a new strip beginning for the next lens. This new strip beginning is pressed against, and connected to, the edge of the next lens. A register is provided for determining the circumference of a lens.

Abstract: A machine for grinding the edges of a spectacle lens, including shaft halves for holding the lens therebetween, a grinding wheel for machining the periphery of the lens, a support for the template that is held by one of the shaft halves, and a measuring head that is connected to a computer and serves for measuring the position of the front and rear sides of the lens at the grinding or contact point, in the vicinity of the periphery of the grinding wheel, relative to a prescribed plane. The measuring head has a fork-like configuration, including fork legs that are disposed parallel to one another and to the prescribed plane, and are spaced from one another by a distance that is greater than the greatest width of the periphery of the lens, whereby the shaft halves with the lens, or the grinding wheel with the measuring head, carries out an oscillating back and forth movement relative to the other.

Abstract: A lens holder for an apparatus for grinding the edges of a lens. The lens holder includes two coaxial, rotatable shaft halves having adjacent ends between which the lens is held. One of the shaft halves is axially shiftable to permit insertion, securing, and removal of the lens. To secure the lens, the axially adjustable shaft half is connected with the piston of a piston/cylinder unit or with a portion of a worm or screw drive. To release the lens, the piston of the piston/cylinder unit, or the gear portion of the worm or screw drive, is manually axially moved along with the shaft half.

Abstract: A device for disengaging a suction mechanism from a lens. A housing is provided that has an upper supporting rim for a lens. The device also has a gripping member that is adapted to grasp the base of the suction mechanism in a forceps-like manner. The gripping member is accommodated in the housing in such a way as to be axially movable therein. When the gripping member moves out of a starting position and away from the supporting rim, the lens is drawn against the latter and can be diengaged from the suction mechanism.

Abstract: A turning tool for machining the edges of plastic lenses in a machine for machining the edges of lenses. A grinding wheel is coaxially connected to a cutter in such a way that they both rotate together. The grinding wheel is provided with respective rough grinding, fine grinding, and bevelling portions.

Abstract: A machine for grinding the edges of a lens via a set of different grinding wheels for rough and finish grinding of the lens. The machine includes a machine housing, a holding element mounted in the housing for holding either the lens or the set of grinding wheels and movable in two directions relative to the other, with these directions being at right angles to one another, a support element provided on the housing, and a toothed-wheel gearing for effecting the movement of the holding element, and hence of the lens or set of grinding wheels disposed thereon, in one of the two directions, with this gearing including a toothed rack on the holding element, and a driven pinion on the support element, with the pinion being coaxially mounted on the support element along with a drive motor, a coupling, and a potentiometer.

Abstract: An apparatus for machining the edge of a lens. A fixed housing having a lid and a bulge is provided. Two half shafts mounted in the housing, with a lens being adapted to be held between these half shafts. A rotatable edge-machining tool in the form of a milling tool is disposed in the housing. A motor is provided for driving the milling tool, with this tool and the motor being movable relative to the housing in two horizontal coordinate directions, whereby the milling tool is adapted to be moved between a rest position in the bulge and an operating position that is in the housing but out of the bulge.

Abstract: An apparatus for grinding the edges of lenses. A lens shaft is mounted on a frame, and a motor driven grinding wheel is provided that can be moved against a lens as well as parallel to the lens shaft. A chamber is mounted on the frame and accommodates a lens and the grinding wheel. A chamber has an observation window and walls, including oppositely disposed side walls that extend essentially perpendicular to the lens shaft, with these walls enclosing, and being spaced slightly from, the grinding wheel and the lens. The chamber has a width, i.e. the distance between the side walls, that is approximately equal to the thickness of the grinding wheel plus the axial displacement stroke of the latter. A wheel shaft that extends through one of the side walls of a chamber has two ends, one of which is disposed in the chamber and carries the grinding wheel, while the other end extends beyond the one side wall.

Abstract: A spectacle lens edge grinding machine either having a support which carries the template abutment and the grinding wheel, and which can be moved toward the fixedly mounted support shaft for the spectacle lens and the template, or a support which carries the support shaft for the spectacle lens and the template, and which can be moved toward the fixedly mounted template abutment and grinding wheel. In the first case, in the direction of movement of the support, a spring element which brings the support into its starting position acts on the support on that side remote from the support shaft for the spectacle lens and the template, and a tensioning device, which can be actuated and the tensioning force of which can be regulated, acts on the support on that side which faces the support shaft for the spectacle lens and the template.

Abstract: A device for centering spectacle lenses and for fastening a holding part on the lenses. The device includes a mounting base, a guide or column sleeve arranged vertically thereon, as well as a casing which is rotatable and displaceable in height, and to which a swivel arm which supports the holding part is connected. The object of the present invention is to make it possible, in a simple manner and without great structural expense and without taking a lot of time and effort, to be able to lower the holding part accurately vertically along a prescribed straight line onto the spectacle lens, so that the holding part maintains a desired precise position on the spectacle lens, and with the aid of which the lens can be inserted in an edge grinding machine. To realize this, the device is embodied such that a torque is exerted upon the casing during longitudinal movement relative to the column sleeve.