EP1534467A1 - Method and device for aligning optical elements - Google Patents
Method and device for aligning optical elementsInfo
- Publication number
- EP1534467A1 EP1534467A1 EP03740344A EP03740344A EP1534467A1 EP 1534467 A1 EP1534467 A1 EP 1534467A1 EP 03740344 A EP03740344 A EP 03740344A EP 03740344 A EP03740344 A EP 03740344A EP 1534467 A1 EP1534467 A1 EP 1534467A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spectacle lens
- receptacle
- adapter part
- lens
- spectacle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/005—Blocking means, chucks or the like; Alignment devices
- B24B13/0055—Positioning of lenses; Marking of lenses
Definitions
- the invention relates to a method for manual alignment of ophthalmic spectacle lenses, in particular semi-finished products of progressive lenses, wherein the spectacle lens is held on one side by means of an intermediate connecting material by a receptacle for processing the free side of the spectacle lens and the receptacle is inserted into a recess in a holding device ,
- the invention also relates to a device for manually aligning ophthalmic lenses.
- the method known and used in practice for aligning a spectacle lens for later blocking on a receptacle for further processing is carried out by stamping a marking and later aligning the spectacle lens on the basis of this stamped on mark.
- the position of the marking on the spectacle lens is specified by two characters inserted into the spectacle lens. Simple semi-finished products that are only processed on one side of the lens have already applied this marking.
- both sides of the semi-finished product can be processed. For this reason, it is necessary to apply the semi-finished product to a new holder for processing the second page after processing a first page.
- the spectacle lens must have exactly the same positioning in the plane perpendicular to the optical axis on the second image as on the first image. For this purpose, it is necessary to detach and clean the lens from its holder after the first machining process so that the marking for the alignment of the second holder can be stamped onto the lens.
- BESTATIGUNGSKOPIE This method has the disadvantage that a new application of a marking and the subsequent alignment based on this marking are subject to certain tolerances. Cleaning before stamping the marking is also a time-consuming and cost-intensive manufacturing process.
- An eyepiece lens production method is known from DE 696 06 340 T2, the lens material being aligned with the support body by rotating the lens material and the support body relative to one another.
- the rotating spindle of the first machining device is rotated, the support body being movable in directions orthogonal to an axis of rotation of the rotating spindle of the first machining device.
- an ultraviolet curing adhesive is used as the adhesive, wherein ultraviolet rays are radiated onto the lens material and the support body after the lens material has been aligned with the support body.
- the lens material is clamped by a loading device, while it is guided through a chuck of a rotating spindle of an inner surface processing device.
- the ultraviolet curing adhesive is dropped onto a surface of the support body to be bonded.
- the adhesive surface of the carrier body is then arranged in an alignment process in such a way that the adhesive surface overlaps with the processed surface of the lens material.
- the support body and the lens material are aligned with each other while they are caused to rotate relative to each other by slowly rotating the rotating spindle. UV radiation is necessary to glue the support body to the lens material. Then a surface of the lens material can be processed.
- a device for processing optical lenses is disclosed in utility model DE 297 23 542 U1.
- Such a device relates in particular to the grinding of glass blanks.
- the lens blank is placed in a clamping tool of a workpiece spindle and on its clamping shoulder mechanically clamped by means of an automatically actuated clamping tool, the clamping tool being a vacuum-assisted collet.
- the lens body can be roughly pre-ground using a rough grinding tool on the tool spindle.
- the second device can also be processed with the same device.
- the utility model DE 297 23 542 U1 refers to mineral lenses, but the aforementioned device cannot be used for spectacle lenses. After machining a surface, the lens is rotated and clamped on the circular circumference in a tool spindle for machining the second surface.
- eyeglass lenses since especially with eyeglass lenses for correcting hyperopia, they have to be made as thin as possible at the edge and therefore cannot be processed at the edge or near the edge.
- the risk of damage to the spectacle lens from the tensioning process of the thin rim would also be very high. Accordingly, the above-mentioned device or the method cannot be used for spectacle lenses.
- Another disadvantage is that eyeglass lenses, which should have a center thickness reduction and therefore the edge must have a free-form course, cannot be clamped in a collet.
- the present invention is therefore based on the object of eliminating the aforementioned disadvantages of the method for aligning a semifinished product and of simplifying and accelerating the process sequence for producing an ophthalmic spectacle lens, in particular a progressive lens.
- this object is achieved in that after processing a free side of the spectacle lens
- the spectacle lens is then aligned on the basis of the markings of the adapter part and the spectacle lens is connected to a second receptacle, the second receptacle being positioned and fixed in a holding device, and
- the semifinished product of the spectacle lens in particular the progressive lens, already has a defined position on a receptacle, this positioning is now maintained according to the invention until a second receptacle has been attached to the semifinished product of the eyeglass lens in the correct position.
- an alignment device which has markings for alignment is used in the method according to the invention.
- the essential feature of the method and the alignment device according to the invention is that the defined position of the semifinished product of the spectacle lens on the first receptacle is maintained until the semifinished product is applied to the second receptacle in a defined manner.
- spectacle lenses that have a free-form shape at the edge can thus be aligned quickly and precisely.
- the alignment device is designed as a positioning device in a further development of the invention and the first receptacle is inserted into a recess in the positioning device, the intermediate process of "aligning" is omitted, since the alignment device with the semifinished product of the spectacle lens is guided into a precisely defined position via the positioning device and is fixed. So the second shot can be applied directly.
- the advantage of this procedure is that the semifinished product of the spectacle lens assumes a precisely defined position in the positioning device based on the first receptacle, so that the aligning process, which is subject to a certain tolerance, with the aid of markings on the aligning device or markings on the semifinished product, is no longer required.
- FIG. 1 alignment device with an alignment reference shown here as a cross bar
- FIG. 2 alignment device according to FIG. 1 in section along the line II-II,
- FIG. 3 alignment device according to FIG. 1 with its marking posts (shown here as crosshairs),
- FIG. 4 alignment device with the semi-finished product of the spectacle lens, the semi-finished product being located on a first blocked receptacle
- FIG. 5 alignment device for exact alignment and application of the semifinished product of the spectacle lens to a second holder, the first holder remaining,
- FIG. 7 shows an alternative embodiment of the adapter plate for aligning the semifinished product of the spectacle lens
- Figure 8 positioning device with holder for the semifinished product of the spectacle lens and an integrated alignment device
- FIG. 9 positioning device according to FIG. 8 with alignment device when the second receptacle is blocked onto the semi-finished product of the spectacle lens.
- FIGS. 1 to 3 show an adapter part 10 for an alignment device 1, as is indicated in FIGS. 4 to 7.
- the adapter part 10 has a cylindrical cavity 2 in the lower region.
- a transverse web 3 is incorporated into the cavity 2 and represents a reference for a first receptacle 6 (see FIG. 6).
- the located marks 4 shown here in the form of a reticle. These markings 4 are used to align one Semi-finished product of an ophthalmic spectacle lens before it is applied to a second receptacle 9 (see FIG. 5), the spectacle lens advantageously being designed as an organic progressive lens.
- the adapter part 10 can also be used to align mineral lenses (especially progressive lenses).
- FIG. 4 shows an eyeglass lens 5, namely a prefabricated product for an eyeglass lens, with its receptacle 6, the prefabricated product with the first receptacle 6 being placed on a block ring 8.
- the block ring 8 lies on a holding device 17 of the alignment device 1.
- the prefabricated product is already connected to the first receptacle 6 by introducing connecting material 7.
- the first side can then be machined or ground.
- the side of the spectacle lens 5 should be provided with a protective layer, which comes into contact with the connection material 7, when using organic spectacle lenses.
- the protective layer can be ensured by sticking on a plastic film or spraying on a lacquer. This protects against possible damage to the lens surface.
- the protective layer increases the adhesion between the connecting material 7 and the spectacle lens 5, since during subsequent surface processing, corresponding forces act on the connection point between the spectacle lens 5 and the connecting material 7.
- FIG. 5 shows the semi-finished product of the spectacle lens 5 with the first receptacle 6 after the processing of the first side.
- the semi-finished product 5 is placed on the block ring 8 with the side already processed.
- FIG. 6 shows the semi-finished product of the spectacle lens 5 with its first blocked receptacle 6 on the alignment device 1.
- the adapter part 10 shown in Figures 1 to 3 the first receiving the adapter part is used "6 wherein the transverse web 3 allows an accurate positioning.
- 10 is used for manual alignment of the Halbfabri- cate 5 based on markers 4, whereby the semi-finished product 5 is aligned with the adapter part 10 to the block ring 8.
- the semi-finished product 5 lies on the block ring 8 with its first machined side. After the exact alignment, the semi-finished product 5 is injected into the cavity 8a of the block ring 8, connected to the second receptacle 9.
- FIG. 7 shows a further possibility of designing the adapter part 10 for aligning the semifinished product of the spectacle lens 5.
- the already existing adapter part 10 can be improved in such a way that a collet 10 ', which is stored in a housing, not shown) is provided instead of the adapter part 10.
- the collet 10' can be pressed from above, for example by means of a pneumatic cylinder, in order to remove or insert the spectacle lens or the semifinished product 5.
- the main advantage of the collet 10 ' is the exact, play-free positioning of the receptacle 6 and thus the semifinished product 5 in the adapter part 10.
- the inaccuracies when blocking the semifinished product 5 can be further reduced. Only the positioning of the adapter plate 10 with the collet 10 'remains on the receptacle 6 as a possible influence on the accuracy when manual blocking is carried out.
- FIG. 8 shows a positioning device 11 for the alignment device 1. Markings 4, as on the adapter part 10 according to FIGS. 1 to 3, are superfluous.
- the first receptacle 6 is integrated in a tensioning device 12 here.
- the tensioning device 12 includes the crosspiece 3 for inserting and aligning the first receptacle 6 and a tensioning mechanism for fixing the first receptacle 6 in the tensioning device 12.
- the tensioning device 12 is attached to a guide 13. On this, the tensioning device 12 can be brought in two positions. On the one hand in the positioning position and on the other hand in the receiving position.
- the guide 13 is firmly connected to an xy cross slide 14. This is required to align the guide 13 and the clamping device 12 to the block ring 8.
- the xy cross slide 14 can be moved in one plane, parallel to the block ring 8. Furthermore, the xy cross slide is connected to the usual alignment device 1 by an adapter plate 15.
- the clamping device 12 in which the first receptacle 6 is already located, is moved along the guide in the z direction and centered on the block ring 8. There, the ophthalmic spectacle lens 5 is blocked on the second receptacle 9.
- the positioning device 11 can be operated mechanically, electrically and pneumatically. Likewise, it can have an end position lock 16 in the receiving position during mechanical operation.
- End position damping 18 is also possible for the positioning position in order to prevent damage to the semifinished product of the spectacle lens 5 ' when it is blocked on the second receptacle 9.
- the alignment can also take place automatically with the aid of a handling device (not shown), for example with the aid of a robot.
- FIG. 9 shows the positioning device 11 according to FIG. 8, in its positioning position for positioning the semifinished product of the spectacle lens 5 on the second receptacle 9, a protective layer being applied to the spectacle lens 5.
- the connecting material is then injected into the intermediate space 8a of the block ring 8. Now the semi-finished product 5 can be removed from the clamping device 12 and thus from the positioning device 11 and the first receptacle 6 together with the connecting material 7 can be removed so that the second side of the semi-finished product 5 can be edited.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10229150 | 2002-06-28 | ||
DE10229150 | 2002-06-28 | ||
PCT/EP2003/006722 WO2004002678A1 (en) | 2002-06-28 | 2003-06-26 | Method and device for aligning optical elements |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1534467A1 true EP1534467A1 (en) | 2005-06-01 |
Family
ID=29761535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03740344A Withdrawn EP1534467A1 (en) | 2002-06-28 | 2003-06-26 | Method and device for aligning optical elements |
Country Status (6)
Country | Link |
---|---|
US (1) | US7749051B2 (en) |
EP (1) | EP1534467A1 (en) |
CA (1) | CA2491096C (en) |
DE (1) | DE10328972A1 (en) |
RU (1) | RU2005102099A (en) |
WO (1) | WO2004002678A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1436119B2 (en) † | 2001-10-17 | 2008-08-13 | Schneider GmbH + Co. KG | Device and method for complete machining of lenses that are optically active on two sides |
DE10300777A1 (en) | 2003-01-11 | 2004-07-22 | Carl Zeiss | Method for parallax-free centering of an optical element |
US20080273073A1 (en) * | 2007-05-01 | 2008-11-06 | Gentex Optics, Inc. | System and method for application of ink formulations onto ophthalmic lenses |
US8182314B2 (en) * | 2008-11-08 | 2012-05-22 | James Gregory Goerges | Automated edged lens deblocking system |
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US4358913A (en) * | 1979-06-04 | 1982-11-16 | Cole National Corporation | Lens block |
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-
2003
- 2003-06-26 US US10/518,994 patent/US7749051B2/en not_active Expired - Lifetime
- 2003-06-26 EP EP03740344A patent/EP1534467A1/en not_active Withdrawn
- 2003-06-26 CA CA2491096A patent/CA2491096C/en not_active Expired - Fee Related
- 2003-06-26 WO PCT/EP2003/006722 patent/WO2004002678A1/en not_active Application Discontinuation
- 2003-06-26 DE DE2003128972 patent/DE10328972A1/en not_active Withdrawn
- 2003-06-26 RU RU2005102099/02A patent/RU2005102099A/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2004002678A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2491096A1 (en) | 2004-01-08 |
US7749051B2 (en) | 2010-07-06 |
CA2491096C (en) | 2012-01-10 |
WO2004002678A1 (en) | 2004-01-08 |
US20050168691A1 (en) | 2005-08-04 |
RU2005102099A (en) | 2005-09-10 |
DE10328972A1 (en) | 2004-01-22 |
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Legal Events
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Owner name: CARL ZEISS Owner name: CARL ZEISS VISION GMBH |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CARL ZEISS VISION GMBH |
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17Q | First examination report despatched |
Effective date: 20061019 |
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Effective date: 20130917 |