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: Disclosed is a process for the production of an edged ophthalmic lens wherein an ophthalmic lens which initially is finished on one side and not yet edged according to a prescribed disk shape, i.e. a so-called blank having only one finished effective surface, is produced and the so-called prescription surface is produced in another manufacturing step, if need be, including optimization of the critical thickness.

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: 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: An improved process for finishing the edge of corrective lenses made of thermoplastic material or of a mixture of thermoplastic and thermosetting plastic materials. This process includes the steps of dry pre-profiling and dry post-profiling the corrective lens and the further subsequent additional process step of wet final finishing and/or calibrating the corrective lens by using an additional fine grinding wheel and applying cooling liquid to the contact area between said corrective lens and said fine grinding wheel.

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: 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.