DE19502537A1 - Spectacle lenses marking appts. e.g. for edging or applying facing or groove - Google Patents

Abstract

The appts. marks the surface of raw material for processing the optical surface and/or spectacle lens material (9). The processing provides edging or facing or grooves on the lenses. The appts. has a locating surface (10, 15) for the untreated glass and/or the lens raw material (9). The appts. also includes a programmable ink jet marker (4) for making the desired marking by e.g. points, stripes. crosses, circles, arcs. etc. The locating surface (10, 15) is preferably part of a focimeter (1, 2, 3) to align the lens raw material (9) with respect to its middle point (13) or a reference point. The ink jet marker (4) is preferably in operative connection with an input device (29) for the required marking.

Description

The invention relates to a device for marking a Surface of raw glass for processing the optical Surface and / or of eyeglass blanks for beveling and if necessary, attaching a facet or groove.

Such markings are placed on a raw glass to in a block device on a block or sucker Raw glass for holding in a device for processing the optical surface with a predeterminable concentration to be able to attach.

There are also markings on lens blanks to attach that the optical center at a Single vision glass or the optical centers or reference points with a multi-strength glass and / or the axis position of Mark astigmatic and / or prismatic glasses. These markings are used to block or sucker  accurate, possibly with one from the glasses wearer and the selected one Spectacle-dependent decentration on the Eyeglass lens blank to bring to the eyeglass lens blank then edge in a spectacle lens edge grinding machine.

The markings can be made using a detection system capture that in operative connection with a control device for a handling device for the precise insertion of a Spectacle lens blanks in a holder Eyeglass lens edge grinding machine stands. Such a thing The detection system is in German patent application P 44 14 784.8 by the same applicant.

Depending on the type of glasses to be labeled, the Glass surface points, lines, crosses, circles, sections of circles or the like attached. That in the previously known application Detection system described is able to mark recognizable on the lens, to take the lens blank and according to the markings and any entered Values for the decentration, axis position and / or position of a Close-up of the exact position in an eyeglass lens grinding machine use where the lens blank according to the selected frame is rimmed.

In European patent specification 0 177 935 there is a device  for marking the surface of lens blanks or Spectacle glasses described in a pair of glasses, in which the Aligning the lens blank or the glasses to the optical center through an apex refractive index controlled. The refractive index determines the spherical vertex power, the cylindrical power, the cylindrical axis position, the horizontal prism value and the vertical prism value of the lens and controls the Shifting the lens or the glasses over a Cross slide holder so that the optical center of the Glass in the axis of the optical system of the The refractive index comes to rest. It is therefore up to the Cross slide sliding side brackets for the Eyeglass lens blank or the eyeglass frame provided, however are also a support with three pins below the Spectacle lens blank or the spectacle lens in the spectacle frame and a hold-down with three pins on top of the Spectacle lens blank or the spectacle lens in the spectacle frame is lowered, required to define the level in which the spectacle lens blank or the spectacle lens in the spectacle frame with respect to the axis of the optical system of the The refractive index comes to rest. After aligning of the lens blank or the lens in the eyeglass frame marks on the glass surface in the form of three aligned points, of which the middle point the  optical center of the lens blank or Spectacle glasses in the eyeglass frame features while by Position of the three aligned points the axis position of one cylindrical portion and / or the horizontal and vertical Prism portion are marked.

The dots are drawn up using one or more ink pens attached to the glass surface. The ink stick (s) are in arranged an obliquely movable carriage, which follows the alignment of the lens blank or the lens in Glasses frame to the optical center of the lens blank or the lens can move in the glasses frame. are three aligned points by means of three points arranged on the slide Attaching ink sticks is the order of the three Ink pens rotatable about the axis of the central ink stick the axis position of a cylindrical section and / or the to draw horizontal and vertical prism values.

If there is only one ink stick that attaches the three dots, this ink stick is horizontal on a sled movable, the guide for this horizontally movable Sled in turn on the inclined guide around a vertical axis is rotatably mounted. To mark a point, the Axial ink stick using an activated electromagnet postponed.  

In this known device is a label provided by three points only. The marking by Dashes would be with appropriate control of the Ink pen if this is on a horizontally movable Slide is arranged, possible, but is not provided, while crosses, circles or segments of a circle intersect with the known device can not be attached.

Furthermore, the device is not suitable for raw glasses have no measurable apex or Progressive lenses through the course of a connecting line between the reference point of the remote part and the reference point of the To mark the near part. Finally, the mechanical structure the known device extremely complicated because the Gripping device for a lens blank or a Control glasses frame and the lens blank or that Spectacle lens in the spectacle frame with its optical axis with respect to the axis of the optical system of the Align the refractive index meter. The structure of the actual marking device with the ink sticks complicated and can lead to errors and inaccuracies.

The invention has for its object a device for Mark the surface of raw glasses and / or  To create eyeglass lens blanks that is simply constructed quick work allowed and for the most diverse Types of glasses is suitable.

Based on this task, a device for Mark the surface of raw glasses and / or Spectacle lens blanks proposed a bearing for one Raw glass and / or a lens blank and one for common markings with dots, lines, crosses, Circles, segments of circles or the like programmable Inkjet marking device.

The inkjet marking device can be made of mechanical and the electronic control part of an inkjet printer consist. Such an inkjet printer is able to execute all entered write commands, d. H. he can both write letters and draw graphics so that the use of the programmable Ink jet marking device for marking the surface from raw glasses and / or from spectacle lens blanks to the simplest Way is possible.

Should be a raw glass for processing the optical surface be labeled, which is required if the optical center after editing the optical  Surface opposite the geometric center of the raw glass should be pre-centered, or on a progressive lens Course of a connecting line between the reference point of the Distance part and the reference point of the near part with reference to a Edge marking on the lens blank in the form of a notch or the like are marked, the support part of a simple centering device with a lighting device below the support and a viewing optics above the Support. This viewing optics allows the Raw glass or the progressive lens on the support parallax free to look at and move along an existing scale and / or to rotate to the raw glass according to the predetermined Pre-center value or the progressive lens with regard to Align the mark in the form of a notch or the like. The ink jet marking device can with a Input device for common markings accordingly the type of glass connected and so on the centering device be appropriate that they are in the area of the support can be moved and controlled there for the respective type of glass provided markings in the form of dots, dashes, Crosses, circles, sections of circles or the like applies.

Should a lens blank with regard to its optical Center or its optical center or Reference points for multi-strength glasses and / or the axis position of  marked astigmatic and / or prismatic glasses , it is advantageous to use the support as part of a To provide the peak power meter and the Inkjet marking device using an input device for common markings according to the type of Eyeglass is connected in the area of the support to be arranged in a controlled, movable manner on the apex refractive index

Especially when using a The projection-peakmeter can be the Watch lens blank on a screen and with regard to the optical center or the optical Align the center points and the axis position. After that the Inkjet marking device by entering the for the Marking the respective type of glass used move over the lens blank and bring the respective Mark on the glass surface.

Aligning the lens blank in the The refractive index meter can be easily moved by hand Observe the focusing screen so that the Inkjet marking device only for the common ones Markings need to be programmed. The Centering device used to mark raw glass or Progressive lenses is required can also be used with the  Combine the refractive index meter in one device so that all types of glass with the device according to the invention have it marked.

Aligning a raw lens or a lens blank can be done without damaging the glass surface if the support with three resiliently displaceable Support pins and an elastic on the raw glass or Eyeglass blank hold-down with three There is a pressure pin that is one level for the glass top define the perpendicular to the viewing axis of the raw glass or the lens blank runs.

To mark the glass surface for the Inkjet marking device always the same distance from the curved surface can ensure a Height adjustment device for the support or for the Ink jet marking device may be provided.

Aligning the lens blank in the Refractometer with reference to the Inkjet marking device can also be used automatically perform when a computer-controlled control device for automatic alignment with regard to the Refractive index measured position of the optical  Center or the optical center or the Reference points for multi-strength glasses and / or the axis position of astigmatic and / or prismatic glasses is provided. This automatic alignment of the lens blank needs not with respect to the axis of the optical system of the To carry out the refractive index meter, but that of Discrepancies identified in the refractive index can be identified in terms of their size and location on the computer-guided Control device in the control of the Guide the inkjet marking device so that it goes straight through the control is led to the points that too are labeled.

However, it is also possible to support on one in two to arrange movable cross slides with horizontal axes, with which the computer-controlled control device in operative connection stands.

The invention will hereinafter be one in the drawing illustrated embodiment of the closer explained. In the Show drawing:

Fig. 1 is a perspective view of a device according to the invention with a projection lensmeter and inkjet marking device and

Fig. 2 shows a longitudinal section through the device.

A housing 1 , shown only schematically, has a focusing screen 2 , on which a test mark image can be sharply imaged by means of an optical system 3 of an apex refractive index meter.

A guide 6 for a cross slide 5 of an ink jet marking device 4 with an ink nozzle 14 is arranged on brackets 31 on the housing 1 . In the rest position, the inkjet marking device 4 is in the position shown in FIG. 1 to the side of the axis of the optical system 3 of the apex refractive index meter, and the nozzle 14 rests on a settling device 7 , by means of which the ink in the nozzle 14 is prevented from drying out.

Below the housing 1 , an electronic control unit 8 is arranged, which with an input device 29 , for. B. is provided in the form of an alphanumeric keyboard.

An eyeglass lens blank 9 rests on three resiliently displaceable support pins 10 which are fastened to a pot-shaped, vertically displaceable support 15 in the region of an opening 11 .

The spectacle lens blank 9 is held on the support pins 10 by a hold-down device 19 with three pins 20 . The pot-like carrier is guided up and down in a lower housing part 16 . A drive in the form of an electric geared motor 17 with an eccentric 18 arranged thereon is arranged below the carrier 15 , so that the eccentric 18 bears against an underside of the carrier 15 . By actuating the electric motor 17 , the carrier 15 can be moved up and down in the desired manner by a corresponding rotation of the eccentric 18 .

The hold-down arm 19 is fastened to a guide rod 22 , which in turn is guided in a bore 23 in the lower housing part 16 . An opening 21 in the hold-down arm 19 lies approximately in the axis of the optical system 3 of the apex refractive index. The spectacle lens blank 9 is pressed against the support pins 10 , which are resiliently displaceable, by the three pins 20 arranged uniformly around the opening 21 . The guide rod 22 of the hold-down arm 19 is guided in the bore 23 in such a way that the pins 20 for the top side of the spectacle lens blank 12 define a plane which is perpendicular to the axis of the optical system 3 of the apex refractive index meter. The guide rod 22 has an axial groove 24 into which a stud screw 25 engages, so that the guide rod 22 can be moved up and down in the bore 23 , but is non-rotatably guided. A spring 28 , which engages a flange 26 at the end of the guide rod 22 , pulls the hold-down arm 19 against the top of the spectacle lens blank and is dimensioned such that the support pins 10 yield so resiliently that even with thickness differences caused by a cylindrical or prismatic cut accurate contact of the top of the lens blank on the pin 20 and the bottom of the lens blank on the support pins 10 is ensured. An proximity detector 27 is arranged on the lower housing part 16 in the region of the flange 26 . Both the proximity detector 27 and the electric motor 17 are connected to the electronic control unit 8 .

To align the spectacle lens blank 9 , the carrier 15 is first moved downward by a corresponding actuation of the electric motor 17 , and the hold-down arm 19 is moved upwards by hand or in a manner not shown by an electric motor, so that there is a space between the support pins 10 on the carrier 15 and the pin 10 is formed on the hold-down arm 19 , between which an eyeglass lens blank 9 to be aligned can be placed. Thereafter, the hold-down arm 19 is lowered until the pins 20 abut against the top of the lens blank 12 , whereby an exact alignment of the top of the lens blank 12 can take place in a plane perpendicular to the axis of the optical system 3 of the apex refractive index meter, support being at least provided by the resiliently displaceable support pins 10 three points takes place, which, as already mentioned, adapts to different edge thicknesses of the lens blank 9 .

The carrier 15 with the eyeglass lens blank 9 and the holding-down arm 19 holding it is then raised by means of the electric motor 17 and the eccentric 18 until the prescribed position in the optical system 3 of the apex refractive index is reached. In this position, the proximity detector 27 triggers a signal that reaches the electronic control unit 8 and stops the electric motor 17 . Now the focusing screen 2 is viewed, the test mark image on the focusing screen is focused and the lens blank 9 is displaced between the pins 10 and 20 such that the optical center 13 of the lens blank 9 is in the axis of the optical system 3 of the apex refractive index. Now the axis position of a possibly existing cylindrical or prismatic cut can also be seen on the focusing screen and the axis can be aligned with reference to a scale on the focusing screen 2 .

Now only the type of the required marking needs to be entered into the keyboard 29 . If it is a spectacle lens blank 9 with a purely spherical cut, the spectacle lens blank only needs to be marked with the usual aligned three points, of which the middle point identifies the optical center of the spectacle lens blank 9 .

If the spectacle lens blank 9 has a cylindrical or prismatic cut, the optical center and the axial position of the cylindrical and / or prismatic cut are identified by a cross marking. If the spectacle lens blank 9 to be identified is a multifocal lens, the optical centers or reference points of the distant part and the near part (s) are to be identified in a corresponding manner after the spectacle lens blank both with regard to the optical center point of the distant part and with respect to the or the Near parts was aligned.

After marking the lens blank 9 , the control unit 8 sets the geared motor 17 back into action, so that the carrier 15 is lowered and the lens blank 9 can be removed.

An unillustrated source of heat radiation or ultraviolet radiation, which is directed onto the surface 12 of the lens blank 9 , causes the ink on the glass surface 12 to dry quickly.

The geared motor 17 , which effects the height adjustment of the carrier 15 , can be controlled by the control unit 8 so that the distance between the curved glass surface 12 and the nozzle 14 of the ink jet marking device 4 always remains the same during the marking process, so that the line width or the marker point size does not change.

In FIG. 2 control line connections between the electronic control unit 8 and the optical system 3 of the lensmeter, the Tintenstrahlmarkiervorrichtung 4, the cross slide guide 5, 6 for the Tintenstrahlmarkiervorrichtung 4, the geared motor 17, the proximity detector 27 and the keyboard 29 are. These control lines can be used to detect a deviation of the optical center 13 of the spectacle lens blank 9 from the axis of the optical system 3 of the apex refractive index by means of the optical system 3 of the apex refractive index, into the electronic control unit 8 and in the to convert electronic control unit 8 into control commands for the inkjet marking device 4 and the cross slide guide 5 , 6 , so that the markings corresponding to the respective glass type are applied precisely to the glass surface 12 despite the deviations. In this case, it is not necessary to align the spectacle lens blank 9 exactly while observing the focusing screen 2 , since the corrections are automatically taken into account. In this way, the marking process can be accelerated considerably since only an approximate alignment of the spectacle lens blank 9 with the optical center of a distant part and possibly one or more near parts is required.

Of course, it is also possible to arrange the support pins 10 in a cross slide on the carrier 15 and to align this cross slide according to the commands of the optical system 3 of the apex refractive index. However, this solution is less advantageous because additional mechanical effort is required.

For marking raw lenses for the processing of the optical surface, which is required if the raw glass is to be pre-centered to save raw material and edging work, or for marking progressive lenses with respect to an edge marking in the form of a notch or the like, which the course of a connecting line between the reference point of the far part and the reference point of the near part, a device with an apex refractive index is not suitable. In this case, the ink jet marking device 4 with the cross slide guide 5 , 6 can be arranged on a device for parallax-free centering of a lens blank according to the German patent 42 33 400 by the same applicant.

To mark a raw glass, this is first centered with respect to its geometric axis in the known device and then shifted by the amount of the pre-decentering. The raw glass is then marked in the usual manner by means of the inkjet marking device 4 .

The blanks of progressive lenses generally have an edge marking in the form of a notch or the like, which characterizes the course of a connecting line between the reference point of the distant part and the reference point of the near part. This notch can be recognized by the lens blank shown in the device for parallax-free centering and can be aligned with respect to the axes or scales, which can also be recognized, so that the usual marking can also be made in this case by means of the inkjet marking device 4 .

Of course, the centering device and the Vertex refractors together in one  Summarize device if required optical Systems are matched, creating a device arises with which all kinds of spectacle lenses have it marked using the inkjet marking device.

Claims (9)

1. Device for marking the surface of raw glasses for the processing of the optical surface and / or of spectacle lens blanks ( 9 ) for the beveling and if necessary the attachment of a facet or groove with

• - A support ( 10 , 15 ) for a raw lens and / or a lens blank ( 9 ) and
• - An ink jet marking device ( 4 ) which is programmable for customary markings by dots, lines, crosses, circles, circular sections or the like.

2. Apparatus according to claim 1, characterized in that the support ( 10 , 15 ) part of an apex refractive index ( 1 , 2 , 3 ) for aligning a lens blank ( 9 ) with respect to its optical center ( 13 ) or its optical centers or reference points Multifocal lenses and / or the axial position of astigmatic and / or prismatic lenses, and the ink jet marking device ( 4 ), which is in operative connection with an input device ( 29 ) for customary markings corresponding to the type of spectacle lens ( 9 ), in the area of the support ( 10 , 15 ) is movably arranged on the vertex refractive index ( 1 , 2 , 3 ). 3. Device according to claim 2, characterized by the use of a projection apex refractive index meter ( 1 , 2 , 3 ). 4. The device according to claim 1, 2 or 3, characterized by a support with three resiliently displaceable support pins ( 10 ) and an elastically on the spectacle lens blank ( 9 ) attachable hold-down ( 19 ) with three pressure pins ( 20 ). 5. Device according to claim 1, 2, 3 or 4, characterized by a height adjustment device (17, 18) for the support (10, 15) or for the Tintenstrahlmarkiervorrichtung (4) for keeping constant the distance between the Tintenstrahlmarkiervorrichtung (4) of the curved surface ( 12 ) of the lens blank ( 9 ). 6. The device according to claim 2, 3, 4 or 5, characterized by a computer-controlled control device ( 8 ) for automatically aligning the lens blank ( 9 ) with respect to the ink jet marking device ( 4 ) with respect to that measured by means of the apex refractometer ( 1 , 2 , 3 ) Position of the optical center ( 13 ) or the optical centers or reference points in the case of multifocal glasses and / or the axis position of astigmatic and / or prismatic glasses. 7. The device according to claim 6, characterized in that the control device ( 8 ) with the arranged on a movable in two horizontal axes slide support ( 10 , 15 ) is operatively connected. 8. The device according to claim 6, characterized in that the control device ( 8 ) with the ink jet marking device ( 4 ) is operatively connected. 9. The device according to claim 1 or one or more of the Claims 2 to 8, characterized in that the support Part of a centering device with a Lighting device below the support and one Viewing optics above the support for aligning a Raw glass with predeterminable pre-concentration or one Progressive lenses with regard to an edge marking in the form  a notch or the like that shows the course of a Connection line between the reference point of the near part features, and the inkjet marking device that with an input device for common markings according to the type of glass connected in the area of the support in a controlled, movable manner on the centering device is arranged.