Abstract: The invention relates to a grinding machine for the edges of spectacles lenses, comprising at least one grindstone and one driven shaft for holding the spectacles lenses, said shaft being able to move radially and axially relatively to the grindstone. The inventive grinding machine comprises at least one operational support which is placed in such a way that it can rotate coaxially on a spindle designed for a shaft of the grinding machine or on at least one pivoting lever which is placed in a non-aligned position on a spindle designed for a shaft of the grinding machine, said operational support being free to pivot in the space between the grindstone and the shaft holding the spectacles glasses.

Abstract: The invention relates to a grinding machine for the edges of spectacles lenses, comprising at least one grindstone and one driven shaft for holding the spectacles lenses, said shaft being able to move radially and axially relatively to the grindstone. The inventive grinding machine comprises at least one operational support which is placed in such a way that it can rotate coaxially on a spindle designed for a shaft of the grinding machine or on at least one pivoting lever which is placed in a non-aligned position on a spindle designed for a shaft of the grinding machine, said operational support being free to pivot in the space between the grindstone and the shaft holding the spectacles glasses.

Abstract: Retaining device (1) for a block or suction element (10) in a centering device for spectacle lenses, having a support, which has a longitudinal axis (2), having a spherically dome-shaped bearing surface (3) on the support, having a spherical dome (5), which is mounted cardanically on the support and is complementary to the bearing surface, having a holding element (6) in the spherical dome for the block or suction element with a contact surface (11) for the spectacle lens, and having a radius (R) of the bearing surface and of the spherical dome, the mid-point (M) of which is located on the longitudinal axis of the support (1) on the contact surface for the spectacle lens.

Abstract: A process of machining spectacle lenses using of a CNC spectacle lens-machining machine is provided. The process includes positioning the rough-cast lens on a holder in the spectacle lens-machining machine, machining an optical surface and/or the edge of the rough-cast lens in accordance with predetermined optical and/or shape-related values, continuously or cyclically checking the position of the rough-cast lens on the holder during machining using a sensor, and continuously or cyclically incorporating any recorded displacement of the rough-cast lens on the holder in the spectacle lens-machining values.

Abstract: The present invention relates to a method and a device for machining glass-lenses using a glass-lens machining apparatus with computerized numerical control. The method of the present invention comprises the following steps: introducing opto-metrical data relating to the glasses support into the computer of the apparatus control device which is provided with a host connection; introducing into the computer the data corresponding to the shape of a selected rim for glasses; introducing into the computer data about the material of the non-machined lens; calculating the required diameter of the glass-lens and displaying the result; introducing a non-machined lens into the apparatus; optionally calculating, e.g. in the host computer, the gradient of a bevel, groove or bezel on the shaped glass-lens according to the data introduced or to the front or back curves which are inherent to the existence of surfaces; and carrying out the computerized numerical-control machining of the non-machined lens.

Abstract: To at least one of mark and drill holes in a workpiece spectacle lens, a position of bores of a lens template is scanned, in which the template includes one of a template spectacle lens, a pattern disk and a support disk. The scanning is performed by a scanning arrangement situated in one of a device for coquilles, a device to cut support disks for spectacle frames, and a spectacle lens edging machine. Data is acquired concerning the position of the bores in accordance with the scanning, and is then fed to a computer. The data includes at least one of rectangular and polar coordinates of the position of the bores. At least one of marking and drilling the holes in the workpiece spectacle lens is performed using a Computer-Numeric-Controlled device in accordance with the data concerning the position of the bores.

Abstract: The invention relates to a method and a device for machining the peripheral edge of spectacle lenses and for optionally applying a subsequent facet thereto. The device comprises a driven spectacle-lens holding shaft which holds the spectacle lens and a machining tool which can be moved in a controlled manner in relation to the spectacle-lens holding shaft. The torque of the spectacle-lens holding shaft is measured and said holding shaft is driven at a constant rotational speed if and for the length of time that the torque is less than or equal to a predetermined value. The torque of the spectacle-lens holding shaft is decreased optionally to a standstill if and for the length of time that the torque exceeds the predetermined value.

Abstract: The present invention relates to a method and a device for forming a bevel on the edge of a glass lens using a lens-edge machining apparatus with computer numerical control.

Abstract: Holding device for a spectacle lens for the purpose of inserting and removing the spectacle lens into or from a container and/or of mounting and removing it on or from a spectacle lens holding shaft of a spectacle lens edge processing machine by means of a handling apparatus, which holding device comprises a base which is held by the handling apparatus and has a depression, a controllable vacuum-pressure connection at the depression, and a spherical cap, which is arranged in the depression, bears tightly against an annular surface of the depression and has an opening to the depression and a sealing region at the edge of the spherical cap for the purpose of bearing against an optical surface of the spectacle lens.

Abstract: The present invention relates to an apparatus for machining glass lenses, wherein said apparatus comprises the following members: a housing; a machining chamber located in said housing; a shaft for maintaining a glass lens and a machining device both arranged in the machining chamber; a cover for outwardly closing the machining chamber; a support for transporting a non-machined lens towards the shaft for maintaining the glass lens when the cover is shut; a detector for measuring the position of the non-machined lens as well as its angular position on the support, said detector being located in the area between the cover and the shaft for maintaining the glass lens; and a control device in the form of a computer. When grinding the glass lens using the machining device, the control device uses the data provided by the detector about the situation and the angular position of the non-machined lens in the shaft for maintaining the glass lens.

Abstract: A polishing machine for spectacle lense edges has a machine support having a guide column. A grinding wheel is seated on a grinding spindle driven by a drive, wherein the grinding wheel, the grinding spindle, and the drive are arranged on the machine support and wherein the grinding wheel has a rotational axis. A spectacle lens securing shaft having a drive and a rotational axis is provided. An upper machine part is connected to the machine support. The spectacle lens securing shaft is arranged together with the drive on the upper machine part. The spectacle lens securing shaft is movable with the upper machine part linearly up and down. The spectacle lens securing shaft is pivotable about an axis of the guide column that is spaced from the rotational axes of the grinding wheel and of the spectacle lense securing shaft and perpendicular thereto. A grinding chamber encloses grinding wheel and spectacle lens securing shaft.

Abstract: A template (1) intended for the lens of a pair of glasses (4), in which the template includes holes (14) for determining a drilling position for applying marks. The template (1) can be connected to a blocking member (10, 11) provided on the lens of the glasses (4) so that the template cannot be displaced and remains rotationally fixed relative to the blocking member (10, 11). The hole or the mark thus remains in a fixed position relative to the glasses lens.

Abstract: In a method for shape grinding a circumferential edge of a spectacle lens, and optionally subsequently facet grinding, in a lens grinding machine that comprises a lens securing shaft and a grinding wheel moveable in a controlled manner relative to the lens securing shaft, the grinding pressure is increased for a decreasing radius of the spectacle lens measured from the rotational axis of a lens securing shaft to a respective contacting location of the spectacle lens at the grinding wheel. The spectacle lens grinding machine for performing the method includes a machine frame, a lens securing shaft and a grinding wheel rotatably supported in the machine frame, a control motor connected to the machine frame for advancing the grinding wheel toward the lens securing shaft, and a computer for controlling the control motor. A travel sensor for detecting the advancing stroke of the grinding wheel toward the lens securing shaft is provided. The travel sensor includes a data transmitting line to the computer.

Abstract: The description relates to a device for facetting ophthalmic lenses with at least one facetting tool which can be engaged with a ophthalmic lens held in a clamp and with a control unit for the facetting tool in which the reference data for the radius r of the lens to be machined in relation to the angle of rotation (.phi.) are stored and which controls the operation in accordance with these reference data. The invention is especially characterized in that the control unit controls the relative movement of the tool along the z axis in such a way that the facet has a predeterminable position on the peripheral edge of the lens.

Abstract: To increase the service life of a grinding wheel which is intended for grinding the borders of spectacle lenses, wherein the wheel comprises a core wheel, preferably made of plastic, and a ring made of sintered metal with embedded diamond particles, a method comprising treating the grinding surface at least occasionally by a fluid jet under high pressure to clean the surface and keep it sharp. The cooling fluid used during grinding may be the fluid in the jet. It may be fed at lower pressure while higher pressure may be occasionally supplied.

Abstract: A method for N-C controlled grinding of the top facet of an ophthalmic lens comprising: determining the length of a circumference of an apex of a facet groove in a lens mount which will receive the lens, determining the length of the circumference of the apex of the top facet in the vicinity of the circumferential edge which is to be installed in the lens mount, comparing those lengths and determining whether the deviation in the length of the facet groove from the length of the top facet is within a preset limit. If it is not within the limit, changing the position of the Lop facet to be within the limit, determining a change value and then finish grinding the top facet using values selected from the comparison value or the change value.

Abstract: A method for machining a spectacle lens includes the step of inputting shape data of a spectacle frame opening or shape data of a shaped disk into a computing unit of a CNC-controlled spectacle lens grinding machine. Personal optometric data of a patient are input in the computing unit. A first radius of a front face of the lens blank and a second radius of a rear face of the lens blank as well as the thickness of the lens blank are input the Alternatively, the first and second radii and the thickness of the lens blank are calculated from the optometric data. The front edge curve and rear edge curve of the spectacle lens are either calculated from the shape data of the spectacle frame opening and the optometric data or based on the shape data of a shaped disk, the first and second radii and the thickness of the lens blank. The spacial curve of a suitable V-shaped bevel on the peripheral lens edge between the front edge curve and the rear edge curve is calculated.

Abstract: A spectacle lens edging machine which supports a lens for rotation on coaxial half shafts, a grinding spindle with an axis parallel to the lens shafts, the grinding spindle is movable radially and axially relative to the shafts and has a grinding wheel thereon for grinding the periphery of a lens. An additional friction wheel driven grinding spindle for beveling the edges of the spectacle lens arranged on the bearing housing for the spindle and so moves radially and axially with the spindle. The grinding tool rotates on an axis extending radially to the axis of the spectacle lens and to the grinding spindle. An angular drive for the additional grinding tool includes a first friction wheel at the main grinding spindle and having a groove in its periphery and a second friction wheel extending into the groove with play to either contact one flank of the groove or to be out of contact therewith.

Abstract: An apparatus for the grinding of at least the peripheral edge of eyeglass lenses, having at least one grinding wheel, at least one rotatable shaft having a holding head for a lens blank, and a recognition device for the optical values and, possibly, the axis position of a cylindrical or prismatic ground surface of the lens blank held by the holding head, and/or for coordinate markings on the lens blank held by the holding head.

Abstract: A device for mounting a retaining part on an optical surface of an ophthalmic blank, e.g., before the insertion of the ophthalmic blank into an ophthalmic glass processing machine. The device has at least one viewing unit for parallax-free centering of the ophthalmic blank, at least one retaining device for supporting the ophthalmic blank during centering, and a motion drive for the retaining device for moving the ophthalmic blank from the centering position at the viewing device into a position for mounting the retaining part.