EP0592527A1 - Process for making a rimmed spectacle lens - Google Patents
Process for making a rimmed spectacle lensInfo
- Publication number
- EP0592527A1 EP0592527A1 EP92914398A EP92914398A EP0592527A1 EP 0592527 A1 EP0592527 A1 EP 0592527A1 EP 92914398 A EP92914398 A EP 92914398A EP 92914398 A EP92914398 A EP 92914398A EP 0592527 A1 EP0592527 A1 EP 0592527A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blank
- spectacle lens
- produced
- edge
- shape
- 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.)
- Granted
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
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
- B24B9/148—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms electrically, e.g. numerically, controlled
-
- 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
- B24B13/06—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes
Definitions
- the invention relates to a method for producing a rimed spectacle lens, in which a spectacle lens, which is finished on one side and has not yet been rim-shaped according to a predefinable lens shape, ie a blank with only one finished effective area, is manufactured and in one In a further production step, the so-called recipe surface is optionally produced while optimizing the critical thickness.
- edged eyeglass lenses usually takes place in several largely separate manufacturing processes:
- a so-called blank is produced by a spectacle lens manufacturer.
- This is understood to be a generally "tubular" single-sided spectacle lens.
- the circumferential contour of a blank can deviate from the circular shape: it has been proposed to produce blanks in the shape of an ellipse.
- the finished surface - sometimes also referred to as the effective surface - is usually the "more difficult to manufacture” surface, ie the progressive surface in the case of a progressive lens or the toric surface in the case of a toric lens.
- the blank is in many cases temporarily “stored” in a "customer-oriented” warehouse.
- the second surface produced which is also referred to as the recipe surface and is usually a "simple" spherical or a toric surface.
- the production of the prescription surface which is often carried out “close to the customer”, ie decentrally in so-called prescription glass production facilities, is generally carried out without taking into account the shape of the glasses in which the glasses are to be inserted.
- the eyeglass lens is rimmed by the respective optician who sold the eyeglasses to a customer. Only if the critical thickness of the lens, i.e. the center thickness for plus lenses or the edge thickness for minus lenses is to be minimized, in conjunction with the manufacture of the prescription surface, the glasses or blank are "pre-rimmed" in accordance with the methods described in the patent literature. For this purpose, reference is made to DE 38 01 384 AI and the literature mentioned there by way of example.
- the glass is to be pre-rimmed, it is necessary both in the prescription glass production facility and at the optician to record the lens shape of the glasses as a data record. Furthermore, it is necessary both in the prescription glass production site and at the optician to pick up the glass for processing, ie to clamp it in such a way that the glass can be inserted into the respective processing device.
- the invention is based on the object of specifying a method for producing a rimed spectacle lens in which a spectacle lens which is finished on one side and has not yet been marginalized according to a specifiable lens shape, ie a blank with only one finished effect surface, is produced by avoiding the repeated execution of various steps, such as the detection and storage of the lens shape of the spectacle frame.
- the invention is based on the basic idea of carrying out the production of the prescription surface and the edge processing without having to re-record the spectacle lens with a data record for the lens shape which has been recorded and stored only once.
- the position of the second surface is calculated with the minimized critical thickness, if necessary, using the stored data record, the predetermined disk shape and the contour of the already finished surface of the blank and the so-called grinding data (viewing point etc.).
- the prescription surface is produced with simultaneous or previous prepositioning of the blank (claim 15) in accordance with the predetermined disk shape.
- the "pre-edging" takes place in particular when the machining device is used for both surface and edge machining, preferably before or at least simultaneously with surface machining, since this minimizes the machining time and makes the milling and polishing process more economical becomes.
- the glass is finished using the saved data record, faceted and polished in the edge area.
- the invention thus enables the production of a finished spectacle lens in a short time by switching off the sources of error previously present. All processes can preferably be carried out in a single processing device, for example a milling device (claim 4) with largely commercially available milling cutters, such as are used for surface processing, and in particular without “reclamping" the blank (claim 3).
- a milling device for example a milling device (claim 4) with largely commercially available milling cutters, such as are used for surface processing, and in particular without “reclamping" the blank (claim 3).
- the use of such a rotating device enables particularly rapid processing.
- the block is preferably already attached by the manufacturer of the blank, as described in DE 40 03 002 A1, to which, moreover, with regard to a possible design, one which can be used both for surface and for edge processing Blocks is expressly referenced.
- This receptacle which can be attached, for example, to the active surface with adhesive rings or the like (claim 8), is preferably a disposable block that can be rend the pre-edging and / or the production of the recipe surface is also processed or reduced in accordance with DE 40 03 002 AI.
- a block is applied to the already completed “effective area” which (initially) is so large that it supports the glass or the blank over a large area during the production of the prescription area.
- the block is then also reduced by the machining tool, for example the milling cutter or the turning chisel, so that its circumferential contour corresponds approximately to the circumference of the edge-processed spectacle lens ).
- This procedure has the advantage that the spectacle lens is always optimally supported during processing.
- the blank can be actively or passively decentered, as is known from the prior art for edge processing, but not for surface processing.
- the decentering can easily be taken into account in surface machining with numerically controlled machining devices.
- this measure can be used independently of the measures mentioned above.
- the further stored data records z ( ⁇ ) can also be used for both surface and edge processing (claim 13).
- the invention can be used for the manufacture of spectacle lenses both by manufacturers of "blanks" and in so-called grinding operations or by opticians.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Eyeglasses (AREA)
Abstract
Selon un procédé de fabrication d'un verre cerclé de lunettes, on produit premièrement un verre de lunettes fini d'un seul côté et pas encore cerclé selon une forme circulaire prédéterminée, c'est-à-dire une ébauche avec une seule surface efficace finie, puis on produit pendant une étape supplémentaire de fabrication la surface dite d'ordonnance, le cas échéant en optimisant l'épaisseur critique. Ce procédé se caractérise par la combinaison des étapes suivantes: la forme circulaire prédéterminée est enregistrée sous forme de jeu de données; la position de la deuxième surface (surface d'ordonnance) est calculée, le cas échéant en minimisant l'épaisseur critique, sur la base du jeu de données mémorisé concernant la forme circulaire prédéterminée et du contour de la surface déjà finie de l'ébauche; la surface d'ordonnance est ensuite produite, en même temps ou après le cerclage de l'ébauche en fonction de la forme circulaire prédéterminée; après la fabrication de la surface d'ordonnance, le verre retenu dans un logement est cerclé, facetté et poli dans sa zone marginale au moyen du jeu de données mémorisé.According to a method of manufacturing a rimmed spectacle lens, firstly an spectacle lens finished on one side and not yet rimmed is produced in a predetermined circular shape, that is to say a blank with a single effective surface. finished, then the so-called prescription surface is produced during an additional manufacturing step, if necessary by optimizing the critical thickness. This method is characterized by the combination of the following steps: the predetermined circular shape is recorded in the form of a data set; the position of the second surface (prescription surface) is calculated, if necessary minimizing the critical thickness, on the basis of the stored data set concerning the predetermined circular shape and the contour of the already finished surface of the blank ; the prescription surface is then produced, at the same time or after the strapping of the blank according to the predetermined circular shape; after the fabrication of the prescription surface, the glass retained in a housing is circled, faceted and polished in its marginal zone using the stored data set.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4121714 | 1991-07-01 | ||
DE4121714 | 1991-07-01 | ||
PCT/DE1992/000550 WO1993001024A1 (en) | 1991-07-01 | 1992-07-01 | Process for making a rimmed spectacle lens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0592527A1 true EP0592527A1 (en) | 1994-04-20 |
EP0592527B1 EP0592527B1 (en) | 1999-04-28 |
Family
ID=6435150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92914398A Revoked EP0592527B1 (en) | 1991-07-01 | 1992-07-01 | Process for making a rimmed spectacle lens |
Country Status (5)
Country | Link |
---|---|
US (1) | US5545075A (en) |
EP (1) | EP0592527B1 (en) |
JP (1) | JPH07509410A (en) |
DE (2) | DE59209685D1 (en) |
WO (1) | WO1993001024A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4417533C2 (en) * | 1994-05-19 | 1996-03-21 | Wernicke & Co Gmbh | Process for CNC-controlled shape grinding of the roof facet of a spectacle lens |
DE19529786C1 (en) † | 1995-08-12 | 1997-03-06 | Loh Optikmaschinen Ag | Method and tool for producing a concave surface on a lens blank |
DE60127792T2 (en) * | 2000-02-16 | 2007-12-27 | Seiko Epson Corp. | METHOD FOR PRODUCING GLASS LENS AND POLISHING TOOL |
ES2323935B1 (en) * | 2009-03-30 | 2010-07-07 | Indo Internacional S.A. | FINISHED OPHTHALMIC LENS AND CORRESPONDING PROCEDURES. |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1356330A (en) * | 1917-07-06 | 1920-10-19 | Clile C Allen | Polishing-tool for ophthalmic lenses |
US2890551A (en) * | 1956-02-20 | 1959-06-16 | American Optical Corp | Apparatus and method of forming ophthalmic lenses |
US3015196A (en) * | 1959-12-07 | 1962-01-02 | David L Campbell | Method of making spectacle lenses |
US3226887A (en) * | 1962-03-07 | 1966-01-04 | Univis Inc | Method and apparatus for processing of ophthalmic lens |
US4203259A (en) * | 1978-05-17 | 1980-05-20 | Coburn Optical Industries, Inc. | Apparatus for edging ophthalmic lenses |
JPS5955411A (en) * | 1982-09-24 | 1984-03-30 | Hoya Corp | Determination method of optimum thickness for spectacle lens |
JPH02109671A (en) * | 1988-10-20 | 1990-04-23 | Olympus Optical Co Ltd | Lens grinding machine and lens working method |
DE4003002A1 (en) * | 1989-11-15 | 1991-05-16 | Wernicke & Co Gmbh | Process and holder for production of spectacles lens - has holder in three parts enabling lens blank to be completely processed without re-mounting |
JPH0816611B2 (en) * | 1989-11-15 | 1996-02-21 | 株式会社トプコン | Method for measuring edge thickness of lens and apparatus therefor |
-
1992
- 1992-07-01 EP EP92914398A patent/EP0592527B1/en not_active Revoked
- 1992-07-01 JP JP5501887A patent/JPH07509410A/en active Pending
- 1992-07-01 DE DE59209685T patent/DE59209685D1/en not_active Revoked
- 1992-07-01 WO PCT/DE1992/000550 patent/WO1993001024A1/en not_active Application Discontinuation
- 1992-07-01 US US08/170,328 patent/US5545075A/en not_active Expired - Fee Related
- 1992-07-01 DE DE4292133T patent/DE4292133D2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9301024A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1993001024A1 (en) | 1993-01-21 |
US5545075A (en) | 1996-08-13 |
EP0592527B1 (en) | 1999-04-28 |
DE59209685D1 (en) | 1999-06-02 |
DE4292133D2 (en) | 1996-08-22 |
JPH07509410A (en) | 1995-10-19 |
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