EP1649977A1 - Dispositif de maintien pour élément optique - Google Patents

Dispositif de maintien pour élément optique Download PDF

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Publication number
EP1649977A1
EP1649977A1 EP05022631A EP05022631A EP1649977A1 EP 1649977 A1 EP1649977 A1 EP 1649977A1 EP 05022631 A EP05022631 A EP 05022631A EP 05022631 A EP05022631 A EP 05022631A EP 1649977 A1 EP1649977 A1 EP 1649977A1
Authority
EP
European Patent Office
Prior art keywords
optical element
pressure piece
expected
force
support elements
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Withdrawn
Application number
EP05022631A
Other languages
German (de)
English (en)
Inventor
Joachim Feucht
Rainer Engel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of EP1649977A1 publication Critical patent/EP1649977A1/fr
Withdrawn legal-status Critical Current

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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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
    • 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

Definitions

  • the invention relates to a receiving device for an optical element according to the closer defined in the preamble of claim 1.
  • the invention further relates to a method for abrasive machining of an optical element.
  • a receiving chuck for optical components for fine grinding and / or polishing thereof which has a cover part with a plurality of recesses, in each of which the optical elements to be processed are accommodated.
  • the recesses are further respective membranes which are pressurized to press the associated optical element against the polishing tool.
  • this object is achieved by a receiving device for an optical element, with a force application device, which is intended to press the optical element during an abrasive machining thereof against an abrasive tool, wherein the force application device on a standing in contact with the optical element, in Direction of the Abrasionstechnik Wegs movable pressure piece acts, the pressure piece is adapted to a expected during the processing of the optical element force distribution within the optical element.
  • the receiving device thus has an acting on the optical element, consisting of a rigid material pressure piece, which is given by its adaptation to the expected during processing of the optical element force distribution, a controllable pressure distribution and thus a significantly improved support of the optical element, so that this deformed much less during processing. Due to these lower deformations, better machining results are possible and it is possible to produce optical elements with a much higher accuracy and / or a smaller center thickness.
  • Such a device may comprise a force application device which is provided for pressing the optical element against the abrasion tool during the abrasive machining thereof. It is advantageous if the force application device acts on the movable in the direction of the Abrasionstechnikmaschines pressure piece, as a result, the force required for abrasive machining force can be applied.
  • the pressure piece on its side facing the optical element has a material which prevents damage to the optical element by the pressure piece.
  • a material which prevents damage to the optical element by the pressure piece In this way is a very gentle treatment of the given optical element during recording of the same in the recording device. This is particularly appropriate if the surface which is in contact with the pressure piece is not processed at a later time. Furthermore, this results in a simple way to prevent co-rotation of the optical element during processing by the most rotating abrasive tool.
  • the pressure piece on its side facing the optical element has a plurality of separate support elements which are intended to come into contact with the optical element.
  • distributed over the pressure pad support elements represent a particularly easy to implement embodiment of the adjustment of the pressure piece to the expected force distribution within the optical element in the processing of the same because the introduction of force from the pressure piece in the optical element by the distribution of the support elements over the surface the pressure piece can be controlled.
  • a particularly simple attachment of the support elements on the pressure piece is given if at least a part of the support elements is substantially round. Another advantage of this embodiment is that with round support elements a particularly accurate force distribution over the surface of the pressure piece is possible.
  • the pressure piece has a cross-section adapted to the force distribution to be expected within the optical element during the processing of the optical element, wherein the pressure piece has a cross section in those areas in which a higher force is to be expected greater thickness than in those areas where a lower force is expected.
  • a very practicable embodiment of the force application device is given if it has a membrane acting on the pressure piece.
  • the achievable with this embodiment advantages can be further increased if the membrane can be acted upon by pneumatic pressure.
  • a method for abrasive machining of an optical element is specified, wherein the optical element is pressed by means of a device against a rotating abrasive tool.
  • the cradle 1 has a force application device 3, which is provided to press the optical element 2 in an abrasive machining thereof against a shown by a dotted line Abrasionstechnikmaschine 4 and so apply the required force for processing.
  • abrasive machining is understood in the present case, for example, a polishing or grinding, so that it may be in the abrasive tool 4 to a grinding or polishing body, which may be of known type and therefore not described in detail below , To achieve a cutting speed, the abrasive tool 4 should rotate about its longitudinal axis.
  • the force application device 3 has a feed bore 6 which is arranged in a base body 5 of the receiving device 1 and which is provided for applying a pneumatic pressure to a diaphragm 7 of the force application device 3.
  • the introduced via the feed hole 6 in the receiving device 1 and the membrane 7 acting on pneumatic pressure can be generated in a known per se, but not shown here in the present manner.
  • the clamped between the main body 5 and a support ring 8 diaphragm 7 bulges when pressurized in the direction of a movable pressure element 9, which is in contact with the optical element 2 and is capable of this in the direction of the arrow "X" against the Abrasionstechnikmaschinemaschinemaschine. 4 to press.
  • the pressure piece 9 is guided by the lateral support ring 8.
  • the support ring 8 serves to support the optical element 2 at its periphery.
  • the support ring 8 is preferably made of plastic, but it could optionally also consist of aluminum or another suitable metal.
  • the pressure piece 9 is described as described below with reference to an exemplary embodiment, to one during the processing of the optical element 2 expected force distribution within the optical element 2 adapted.
  • the pressure piece 9 on its side facing the optical element 2, that is on its side facing away from the membrane 7, a plurality of separate support elements 10, which are intended to come into contact with the optical element 2.
  • the support elements 10 form that part of the pressure element 9 which is in contact with the optical element 2.
  • the pressure piece 9 does not touch the optical element 2 in the spaces between the support elements 10.
  • the pressure piece 9 is provided with corresponding recesses 11, in which the support elements 10 are preferably glued.
  • the support elements 10 are substantially round, but it would also annular or other suitable shape having support elements 10 conceivable and it would of course also possible annular, oval, round and another shape having support elements 10 at to use one and the same pressure piece.
  • the support elements 10 are preferably made of an elastic material which prevents damage to the optical element 2 and at the same time ensures that an undesired movement of the optical element 2 during the rotation of the abrasive tool 4 is prevented.
  • the preferably elastic material of the support elements 10 may be, for example, rubber, but also a relatively soft plastic.
  • the distribution or arrangement of the support elements 10 over the surface of the pressure piece 9 as well as the shape and the size thereof preferably takes place via a calculation according to a finite element method with which those points or regions of the optical element 2 can be determined which in the processing of the optical element 2 with the abrasive tool 4, a higher force occurs than in other areas of the optical element 2.
  • a higher force occurs than in other areas of the optical element 2.
  • the support elements 10 may also have different hardnesses in one and the same pressure piece 9, in order to achieve a better adaptation to the expected during the processing of the optical element 2 force distribution within the same. Since finite element methods are known per se, it is not necessary to go into detail here.
  • the illustrated distribution of the support elements 10 over the surface of the pressure piece 9 is considered to be purely exemplary and suitable for a particular optical element 2 and it is with respect to a minimal deformation of the optical element 2 in the abrasive processing of the same advantageous if for each geometrically different design of the optical element 2 to be processed a separate calculation of the required distribution of the support elements 10 is performed. In this case, that the pressure piece 9 in those areas in which a higher force is expected to have a larger number of support elements 10 than in those areas in which a lower force is expected. If very similar results are obtained in the calculation of the distribution of the support elements 10 for different optical elements 2, then it is of course possible to design only an identical pressure element 9 for these different optical elements 2.
  • the pressure piece 9 would be in those areas in which a higher force is to be expected, with a greater thickness, ie a greater extent in the x direction, than in those areas where a lower force is expected.
  • the pressure piece on its side facing the optical element 2 to the surface of the to adapt the optical element 2, ie, to provide the pressure piece 9 with a curvature corresponding to the curvature of the optical element 2. Damage to the optical element 2 could be prevented in that the pressure piece 9 would be provided on its side facing the optical element 2 with a corresponding, preferably damaging the optical element 2, preferably elastic material, such as plastic or rubber. This is particularly useful if the pressure piece 9, as is to be preferred, made of metal, preferably made of steel or aluminum. Optionally, glass or a plastic suitable for its hardness for the pressure piece 9 can be used.
  • the receiving device 1 it would be possible to dispense with the force application device 3 and to use the abrasive tool 4 for applying the force required for processing.
  • the pressure piece 9 could then be rigid and the optical element 2 applied against the applied by the abrasive tool 4 Support force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP05022631A 2004-10-21 2005-10-18 Dispositif de maintien pour élément optique Withdrawn EP1649977A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004051155A DE102004051155A1 (de) 2004-10-21 2004-10-21 Aufnahmevorrichtung für ein optisches Element

Publications (1)

Publication Number Publication Date
EP1649977A1 true EP1649977A1 (fr) 2006-04-26

Family

ID=35414646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05022631A Withdrawn EP1649977A1 (fr) 2004-10-21 2005-10-18 Dispositif de maintien pour élément optique

Country Status (4)

Country Link
US (1) US20060089088A1 (fr)
EP (1) EP1649977A1 (fr)
JP (1) JP2006116697A (fr)
DE (1) DE102004051155A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011076904A1 (fr) * 2009-12-24 2011-06-30 Essilor International (Compagnie Generale D'optique) Procédé de montage d'une lentille optique devant être polie

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130303060A1 (en) * 2010-11-26 2013-11-14 Schneider Gmbh & Co. Kg Block piece
LU92190B1 (en) * 2013-05-06 2014-11-07 Satisloh Gmbh Multi part blocking piece

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441108A (en) * 1947-02-24 1948-05-04 Eastman Kodak Co Abrading apparatus
US3886696A (en) * 1972-10-26 1975-06-03 Loh Kg Optik W Mounting device for optical lenses
US5357716A (en) * 1988-10-20 1994-10-25 Olympus Optical Company Limited Holding device for holding optical element to be ground
US5951375A (en) * 1996-05-17 1999-09-14 Optotech Optikmaschinen Gmbh Support for optical lenses and method for polishing lenses

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151233A (en) * 1937-01-21 1939-03-21 American Optical Corp Lens blocking
DE3934180C2 (de) * 1988-10-20 1996-02-08 Olympus Optical Co Haltevorrichtung für eine zu schleifende optische Linse
US5095660A (en) * 1988-10-25 1992-03-17 Dillon Laurence A Polishing means for lens generating apparatus
US5255474A (en) * 1990-08-06 1993-10-26 Matsushita Electric Industrial Co., Ltd. Polishing spindle
US5410843B1 (en) * 1991-05-16 1998-06-09 Wernicke & Co Gmbh Process for finishing the edge of corrective lenses made of plastic
US5462475A (en) * 1993-02-12 1995-10-31 National Optronics, Inc. Blocking system for prescription lenses
JPH06328355A (ja) * 1993-05-21 1994-11-29 Olympus Optical Co Ltd レンズ保持装置
JPH07164298A (ja) * 1993-12-10 1995-06-27 Olympus Optical Co Ltd レンズ保持装置
JP2626552B2 (ja) * 1994-05-23 1997-07-02 日本電気株式会社 球面加工装置及び方法
FR2725047B1 (fr) * 1994-09-27 1997-01-31 Essilor Int Procede et dispositif pour obvier a la fragilite des aretes d'une lentille ophtalmique, et lentille ophtalmique correspondante
US5762546A (en) * 1995-12-13 1998-06-09 Coburn Optical Industries, Inc. Pneumatically assisted conformal tool for an ophthalmic lens finer/polisher
DE19750428B4 (de) * 1997-11-14 2007-06-21 Optotech Optikmaschinen Gmbh Verfahren und Vorrichtung zum Bearbeiten von Linsen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441108A (en) * 1947-02-24 1948-05-04 Eastman Kodak Co Abrading apparatus
US3886696A (en) * 1972-10-26 1975-06-03 Loh Kg Optik W Mounting device for optical lenses
US5357716A (en) * 1988-10-20 1994-10-25 Olympus Optical Company Limited Holding device for holding optical element to be ground
US5951375A (en) * 1996-05-17 1999-09-14 Optotech Optikmaschinen Gmbh Support for optical lenses and method for polishing lenses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011076904A1 (fr) * 2009-12-24 2011-06-30 Essilor International (Compagnie Generale D'optique) Procédé de montage d'une lentille optique devant être polie
CN102725103A (zh) * 2009-12-24 2012-10-10 依视路国际集团（光学总公司） 一种用于安装待抛光的光学透镜的方法
US8951097B2 (en) 2009-12-24 2015-02-10 Essilor International (Compagnie Generale D'optique) Method for mounting an optical lens to be polished
CN102725103B (zh) * 2009-12-24 2016-08-10 依视路国际集团（光学总公司） 一种用于安装待抛光的光学透镜的方法

Also Published As

Publication number Publication date
DE102004051155A1 (de) 2006-04-27
US20060089088A1 (en) 2006-04-27
JP2006116697A (ja) 2006-05-11

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