EP0432078A2 - Machine pour biseauter des lentilles - Google Patents

Machine pour biseauter des lentilles Download PDF

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Publication number
EP0432078A2
EP0432078A2 EP90500100A EP90500100A EP0432078A2 EP 0432078 A2 EP0432078 A2 EP 0432078A2 EP 90500100 A EP90500100 A EP 90500100A EP 90500100 A EP90500100 A EP 90500100A EP 0432078 A2 EP0432078 A2 EP 0432078A2
Authority
EP
European Patent Office
Prior art keywords
lens
machine
wheel
holder carriage
lens holder
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
Application number
EP90500100A
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German (de)
English (en)
Other versions
EP0432078A3 (en
EP0432078B1 (fr
Inventor
José Maria Lopez Cebollero
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.)
Indo Internacional SA
Original Assignee
Indo Internacional SA
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
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Application filed by Indo Internacional SA filed Critical Indo Internacional SA
Publication of EP0432078A2 publication Critical patent/EP0432078A2/fr
Publication of EP0432078A3 publication Critical patent/EP0432078A3/en
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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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B24B47/225—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation for bevelling optical work, e.g. lenses

Definitions

  • the invention relates to a lens bevelling machine, com­prising: a first guide bar; a lens holder carriage moveable along the first guide bar between a first rest position and a second work position; actuatable means for retaining the lens holder carriage in the first position thereof; resilient means urging the lens holder carriage to the second position thereof on being released from said retaining means; a rod on said lens holder carriage, disposed at rightangles to said first guide bar and adapted to support a template; a longitudinally moveable rack mounted on the lens holder car­riage in alignment with the rod and adapted, together with the rod to hold the lens; a motor and transmission means for causing the rod and the rack to rotate; a second guide bar parallel to said rod and rack; a wheel holder carriage longitudinally moveable along the second guide bar and com­prising a shaft parallel to the second guide bar; grind wheels mounted on said shaft; means for causing the grind wheels to rotate; drive and motion transmission means; detec­tion and signal emitting means;
  • the generally known machines of the type described do not allow the contour or periphery of the lenses for mounting a corresponding frame to be satisfactorily performed.
  • said wheel holder carriage comprises a driving member, directly associ­ated with a stepper motor capable of causing said longitudi­nal movement, and a driven member, associated with the former by means of a locking device comprising, on the one hand, a rotating cam driven by a motor fixedly attached to the driven member and provided on the periphery thereof with portions of variable width from a portion of maximum width to a portion of minimum width and, on the other hand, a cam guide fixedly attached to the driven member and inside which there moves a cam which may fit snugly in the cam guide when the maximum width portion thereof engages in the guide, there being formed a position of fixed attachment between the driving and driven members, while when a portion of narrower width enga­ges the cam guide, said position of fixed attachment between the driven member and the driving member ceases to exist; and in that between said detection means there is an encoder for detecting the successive positions of said driven member and a feeler, located in
  • the machine of the invention comprises basically a platform 1 on which there is mounted a first guide bar 2 and a second guide bar 3 disposed at rightangles and in different planes.
  • a lens holder carriage 4 may move along the first guide bar 2 between a first rest position (illustrated in Figure 1) and a second operative position (shown in part in Figure 9).
  • a wheel holder carriage 5, to be referred to hereinafter, is mounted on the second guide bar 3.
  • FIG. 2 there is illustrated in greater detail, albeit also schematically, the lens holder carriage 4.
  • a rod 7 parallel to the second guide bar 3 and, therefore, disposed at rightangles to the first guide bar 2.
  • This rod is adapted to support a template 9 which is associated, as will be described hereinafter, with the repro­ducing unit 6.
  • a rack 15 which may be moved lengthwise by a pinion 16 driven by a motor 17. The rack 15 is aligned with the rod 7 and these two members are adapted to hold a lens 8 therebetween.
  • the rod 7 and the rack 15 and, therewith the lens 8 and the template 9 are caused to rotate by a stepper motor 10 and corresponding transmission means comprising a gear train 11, a shaft 12, pulleys 13 and belts 14.
  • the carriage 4 runs on bearings 18 along a rail 19 fixedly attach to the platform 1.
  • FIG. 3 shows means for retaining the lens holder car­riage 4 in the said first rest position.
  • Said retaining means comprises a lever 20 which pivots about a shaft 21 and has a hook shaped end portion 22 which may engaged a fixed pin 23. The other end of the lever 20 is engaged by a spring 25 ur­ ging the lever to the retained position thereof.
  • An electro­magnet surrounds a pusher 24 and when the former is energised the pusher 24 engages the lever and urges it out of the re­tained position thereof.
  • FIG. 4 schematically shows the wheel holder carriage which may move lengthwise along the second guide bar 3.
  • Said carriage 5 comprises a driving member 30 and a driven member 31.
  • a stepper motor 32 causes the driving member to moved along the guide bar 3 by way of a spindle 45′ ( Figure 5).
  • the driven member 31 comprises a shaft 33 on which there are mounted the grind wheels 34.
  • Said shaft is driven by a motor 35 and a belt 36 and pulleys 37 transmission.
  • a feeler 38 for detecting the positions of the lens 8. Said feeler is des­cribed more fully hereinafter.
  • the driving and driven members 30, 31 are mutually as­sociated by a locking device 40 ( Figures 4 and 5).
  • the driving member 30 is fixedly attached to a rotating cam 43, caused to rotated by a motor 42.
  • the cam 43 is provided on the periphery thereof with portions of different which, com­prised between that of a maximum width portion (the cam por­tion closest to the guide bar 3 in Figure 5) and that of a minimum width portion (the cam portion farthest removed from the guide bar 3 in Figure 5).
  • the driven member 31 is fixedly attached, in turn, to a cam guide 44 defining a gap in which the cam moves while rotating.
  • the width of the gap is substantially the same as the width of the widest portion, where by the cam 43 is adap­ted to fit snugly in the cam guide 44 when the maximum width portion of the cam is positioned in the cam guide 44.
  • the driven member 30 is unmovably attached to the driven member 31, such that both members move jointly over the whole length of the second guide bar 3.
  • An encoder shown in Figure 12 is adapted to detect the successive positions of the driven member 31 and store them in the memory of a computer and a microprocessor adapted to receive signals from the encoder or from other detectors, sas well as to control the various drive means.
  • Figure 6 shows resilient means urging the lens holder carriage 4 towards the second operative position thereof from the time when said carriage 4 is released from said retaining means.
  • the resilient means comprises a spring 51 attached at one end thereof to the carriage 4 and drawing the carriage, urging the lens 8 against one of the grind wheels 34.
  • tensioning means 47 comprising cables 52 and 53 and pul­leys 54 and 55 associating the other end of the spring 51 with a nut screwed on a spindle 49, mounted in a support 50.
  • a stepper motor 48 causes the spindle to rotate and therefore movement of the nut, adjusting the tension of the spring 51.
  • the machine of the invention is provided with a repro­ducing unit 6 comprising a circular sector 57 the radius of which is substantially the same as that of the grind wheels 34.
  • the sector extends from a member 58 on which there are two contacts 59 and 60 held apart by a spring 61.
  • the circular sector 57 is mounted on a shaft 62 driven by a spindle 63 from a stepper motor 64, with a coupling 65 and having a bearing 66.
  • This mechanisms allow the sector 57 to be moved parallel to the first guide bar 2 between a first retracted position and a second contact position.
  • the rod 7 is substantially equidistant from the surface of sector 57 and the surface of the grind wheels 34 or, in other words, the perimeter of the sector 57 is substantially a right projection of part of the perimeter of the grind wheels 34 where by when the sector 57 and the grind wheels 34 are viewed from the side they are apparently super-­imposed.
  • the machine is provided with means to moved the first retracted position of the sector 57 slightly forward or backward. As discussed hereinafter, this allows lenses to be ground to a perimeter which is slightly larger or slightly smaller than the perimeter of the template 9.
  • the lens holder carriage 4 is provided with a movement measuring device 67 ( Figure 8) formed by a bracket 68, a square 69 and which comprises a toothed belt 70 driving an encoder 71.
  • Figures 10 and 11 show another embodiment of a movement measuring device 75 for the lens holder carriage 4 along the first guide bar 2.
  • the device 75 comprises a wheel 66 having a peripheral rubber ring 77.
  • the wheel is coaxial with an encoder 78 and the two are drivingly connected together whereby they rotate simultaneously.
  • These members are attached to a bar 79 which pivots about a pin attached to a fork on the machine platform 1.
  • the wheel bears against a square 80 attached to the lens holder carriage 4 and movement of the square causes the wheel 76 and, therefore, the encoder 78 to rotated. To ensure cor­rect support of the wheel 76 there is a counterweight 81 beside the encoder 78.
  • grind wheels 34 which are for rough grinding of mineral or glass lenses, for rough grinding lenses made from plastics or organic material, for smooth grinding self centering bevels, for smooth grinding guided bevels, etc.
  • the grind wheel is providing with a off-center V-shaped groove. From the groove to the nearest side wall of the grind wheel the slope of the V is steeper and here the grind wheel is harder, whereby it cuts less. Reciprocally, from the groove to the more distant side wall of the grind wheel, the slope of the V is gentler (i.e. the surface differs less from a cylindrical surface) and the grind wheel is softer, i.e. it cuts more.
  • the appropriate template 9 is mounted in the corresponding place on the lens holder carriage 4.
  • the lens 8 which it is desired to rough grind (and subsequently bevel) is trapped between the rod 7 and the rack 15, the pressure being adjusted depending on the characteristics of the lens, which are also indicative of the tension which is it desired to apply to the spring 51 by way of the tensioning means 47. It is also determined in advance whether the rough grinding is to be effected by repeated short reversals of the rotation of the rod 7 (and therefore of the lens 8) or by a continuous slow rotation of the said rod.
  • the reproducing unit 6 moved forward, whereby the sector 57 leaves the first retrac­ted position thereof to reach the second position thereof in which it releases the lens holder carriage 4.
  • Figure 12 shows a device 82 similar to the previous device 75, although in this case it is for measuring the movement of the driven member of the of the wheel holder carriage along the second guide bar 3.
  • Said device 82 comprises a wheel 83 provided with a peripheral ring 84.
  • the wheel is coaxial with an encoder 85 and the two are drivingly connected together such that they rotate simultaneously. These members are attached to a bar 86 which rocks around a pin attached to a fork of the machine platform 1.
  • the wheel 83 bears against a plate 87 attached to the wheel holder carriage 5 and a movement of the plate 87 causes the wheel 83 and, therefore, the encoder 85 to rotate.
  • a counterweight 88 beside the encoder 85.
  • Figure 13 shows certain details relating to the feeler 38. As stated above, this is located adjacent the grind wheels 34 and is designed to engage the the lens 8.
  • the feeler 38 comprises a base 89 to which there is adhered a conductive sheet 90, preferably of silver. Between the sheet 90 and the base 89 there is an insulating film 91 which in the position shown is in connection in turn with a first contact 92 and a second contact 93. Independently of the strip 90, both contacts 92, 93 are insulated from each other. The said contacts 92, 93 are also preferably of silver and have cables 94 connecting them to the machine processing systems (computer and microprocessor).
  • machine processing systems computer and microprocessor
  • a stem 95 which passes through an elongate hole 96 of a support member 97 made from stainless steel attached to another support member 98 of insulating material which is fixed to the wheel holder car­riage 5, with an O-ring between them.
  • the free end of the stem is covered by a resilient sheath 99, associated with a rubber shield 100, sealingly attached to the support member 97.
  • a spring 101 urges the assembly to a centered position such as shown.
  • the feeler is also adapted to occupy a first position of oscillation in a first direction (to the left in the figure) in which the conductive sheet 90 only connects with the first contact 92, being spaced apart from the second contact 93. Furthermore, there is a second position of oscillation in the second direction (to the right in the figure) opposite to said first direction. In the second position, connection is maintained with the second contact 93, being spaced apart from the first contact 92. These positions are transmitted over the cables 94 to the processing systems, where they are associated with the lens position.
  • the carriage 4 comes under the action of the thrust force A of the spring 51 whereby the carriage 4 leaves the first rest position thereof and moves towards the second working position thereof. Therefore, the template 9 keeps in contact with the sector 57 during the return of the latter to the first position thereof. This contact is maintained until the lens 8 makes contact with the corresponding rough grind­ing wheel 34, which stops the lens holder carriage 4 while the reproducing unit 6 and the sector 57 return to the first retracted position, with the template 9 separating from the sector 57.
  • the rough grinding action of the grind wheel 34 on the lens 8 to be rough ground causes the lens holder car­riage 4 to feed further forward.
  • This further forward feed produces a further contact between the template 9 and the sector 57, with the consequent closure of the contacts 59 and 60, causing the rod 7 and the lens 8 to rotated slightly.
  • This slight rotation brings an unground portion of the lens 8 face to face with the grind wheel 34 whereby the carriage 4 recedes and the sector 57 and template 9 moves apart again, with the rough grinding (alter­nating or continuous) of the lens and the successive repeti­tion of the cycle being continued, i.e. forward feed of the carriage until further contact between the template 9 and the sector 57, further rotation of the rod 7 and lens 8, further separation of the template 9 and further rough grinding, until the said rough grinding is finished all around the periphery of the lens 8, to conclude with a light smooth grind provided by the same rough grinding wheel.
  • a self centering bevel grind may be obtain also with template by proceeding as follows.
  • the reproducing unit 6 slightly pushes the template 9 while the driving member 30 and the driven member 31 remain fixedly attached to each other, since the maximum width portion of the rotating cam 43 is inserted in the cam guide 44.
  • the motor 32 drives the wheel holder car­riage 5 until the feeler 38 engages the convex surface of the lens 8 ( Figure 4), whereupon the feeler sends a signal cor­responding to the position of the lens 8 to the encoder 85 for movement of the carriage 5.
  • the lens holder carriage 4 withdraws and the wheel holder carriage 5 is located in such a way that the V-shaped groove of the corresponding self centering bevel grinding wheel becomes aligned with the lens 8, after which a movement of the reproducing unit 6 locates the lens holder carriage 4 in such a way that the lens 8 enters the said V-shaped groove, without any risk of sliding along one of the surfaces of the V, preventing the grind wheel from engaging a front surfaces of the lens, which would cause marks on such sur­ face.
  • the lens 8 After the rough grinding the lens 8 usually has a curved surface since it reproduces the shape of the inside of the rim of spectacle frames. While the lens rotates, the peri­phery thereof (now within the V groove) suitably moves the grind wheel. During rotation a series of contacts occur between the template 9 and the sector 57, whereby the lens holder carriage 4 moves backwards and forwards over a short distance.
  • the encoder 85 of movement of the driven member 31 outputs signals relating to the movement of member 31.
  • a further rotation of the cam 43 locks the driving member 30 and driven member 31 together again, so that in the subsequent bevelling revolutions, it is the motor 32 which controls the movements of the wheel holder carriage 5, thereby avoiding the possibility of deforming the bevel already made.
  • the reproducing unit 6 pushes the template 9, returning the lens holder carriage 4 to the first rest posi­tion thereof, where it is retained by the retaining means, i.e. the lever 20 engaged with the fixed pin 23. Reference will be made hereinafter to further bevelling operations.
  • the pertinent forward or backward move­ments of the reproducing unit 6 are controlled by the micro­processor program.
  • the lens holder carriage 4 is subjected to a thrust A and accompanies the reproducing unit 6 through the template 9.
  • the following functions may be carried out among others: controlled feed towards the rough grinding wheel, stopping on reaching the rough grind dimension, recoil for changing from rough to smooth grinding, feed towards the bevelling wheel, stopping on reaching the smooth grinding dimension, forward and reverse feed to reproduce a form pro­grammed in the microprocessor, forward and reverse feed to reproduce a particular template size or shape, recoil to the rest position.
  • the thrust A may be adjusted at will, depending on the thickness and characteristics of the lens and may be modified while working.
  • the thrust A should be held constant while working independently of the shape and size of the lens, to which end there is a powered mechanism which, moving at the same speed as the powered support, maintains the trac­tion constant by way of the spring thereof.
  • the spring 51 draws the lens holder carriage 4 towards the grind wheels 34, while the spindle 49 pulls on the spring 51 at the same rate as the unit 6 withdraws, thereby main­taining a constant tension across the ends of the spring.
  • this mechanism may allow the rest position or stepped positions according to conven­tional pressure increments, such as fractions of 1/2 or 1 kg.
  • the lens may be slightly deformed, whereby it is absolutely necessary to have a means capable of detecting the exact position of the lens once it has been held and trimmed by the rough grinding wheel.
  • the feeler 38 acts in such a way that once the lens 8 has been rough ground, the carriage 4 with­draws and separates the lens from the grind wheel 34 and thereafter the wheel holder carriage 5 moves to located the feeler alongside the convex surface of the lens, the carriage feeding forward again until the lens reaches the measuring height and finally the wheel holder carriage moves the feeler in the opposite direction in engagement with the lens periphery.
  • This detecting operation may be performed at one or more points around the periphery coinciding with the points of inflection determining the shape of the spectacles, or at particular positions, e.g. every 90°, as also on the other side of the lens, i.e. the concave side.
  • the position of each of the sides of the lens and the thicknesses of the contour are accurately known. These details are necessary for the automatic preparation of any type of bevel. Once a single point of the lens periphery is known, it is sufficient for the grind wheels to move and locate themselves accurately in place.
  • the reproducing unit 6 performs a horizontal movement increasing or reducing the size of the lens 8 relative to the template 9, according to how the position of the circular sector 57 is modified relative to the periphery of the grind wheels 34.
  • a template 9 having the shape of the frame is placed in the lens holder carriage 4, the machine will repro­duce it on the lens 8, with the size depending on the posi­tion of said sector.
  • This same device may reproduce frame shapes if these data are stored in a computer, whereby the template 9 must be completely circular and have a preset diameter.
  • the motors 10 and 64 and member 58 act synchronous­ly throughout the work program.
  • This unit performs the fol­lowing operations among others: increase or reduction of the lens size relative to the template, electronic reproduction of a shape and feeding the lens towards the grind wheel or withdrawing it therefrom.
  • This automatic lens grinding machine is capable of making a direct copy from the template having a shape of the rim of a spectacle frame, or an electronic copy through a computer in which a large number of spectacle frame shapes and sizes are stored. When a particular shape is required from the memory, it may be reproduced on the lens by way of the powered support 6.
  • the shape of a spectacle frame shape may be entered in the memory in at least three different ways: a) by program from diskette or tape; b) by direct copy of the frame using an apparatus capable of tracing the silhouette of a rim and converting the values of the mechanical movement into elec­tronic equivalents; c) by direct measurement from the bevel­ling machine itself through a template mounted on the lens holder carriage bearing against the powered sector, which is fixed and coincides with the grind wheel periphery.
  • the template rotates, it causes the lens holder car­riage to move and these movements are measured by the encoder which converts the linear movement of the carriage into rotary movements, whereby the distance between the grind wheel periphery and the center of the template is known at all times.
  • the wheels grind the lens within the machine and the latter is provided with a casing to dampen the noise produced therein.
  • the upper lid of the casing is provided with an automatic opening and closing device.
  • An inner trough col­lects the coolant and glass remains and leads them to an external tank.
  • the present automatic bevelling machine incorporates a hi-tech microprocessor control and is prepared to reproduce shapes from a conventional template, or by electronic copy­ing, through a peripheral system, directly from a frame, template or lens, which peripheral system combines the func­tions of reading, centering, blocking, storing and sending commands to the bevelling machine, and both the bevelling machine and the peripheral unit are provided with a keyboard and monitors for interfacing with the operator in the chosen language, i.e. Spanish, English, French, Italian or any other.
  • the electronic template may be required from the diskette store or read directly from a frame, template or lens, through the automatic device.
  • the purpose of the said peripheral system is to send the bevelling machine a package of data corresponding to the contour of an off-center lens, according to optical para­meters, over a communications bus, for subsequent grinding of an ophthalmic lens having the shape of said contour, where a button has been adhered to said lens to allow it to be mounted in the grinding machine.
  • Said peripheral system is formed by three optional independent modules, i.e. a contour reader ML, a contour store MA and a lens blocking and centering device MC, which are controlled by a computerized electronic system SEC, which interfaces with the user through a monitor M and a keyboard.
  • a contour reader ML i.e. a contour reader ML
  • a contour store MA i.e. a contour store MA
  • a lens blocking and centering device MC which are controlled by a computerized electronic system SEC, which interfaces with the user through a monitor M and a keyboard.
  • the function of the read module ML, driven by a motor MG, is to pick up the inner shape of a frame rim or the ex­ternal contour of a template or bevelled lens, said contour being determining by a list of points in polar coordinates with a center inscribed in the pick up contour.
  • the store module MA allows the contour pick up by the reading module ML to be stored in the two diskettes D of the system, classifying with the name of the frame or with any other reference through the alphanumeric keyboard.
  • the purpose of the blocking and centering module MC is to superimpose the analogue image of the projection of a lens on a semi transparent screen on the monitor M, after picking it up by a video camera CV.
  • the lens is blocked with an automatic mechanism MB, with the form to be ground being stored in a buffer memory of the SEC, for re­trieval by the bevelling machine when required.
  • the SEC starts out from a control unit UC to which the monitor M with an image processor PI and a con­trol panel PM with a keyboard interface IT revert.
  • the as­sociation with the peripheral modules is as follows: between it and the read module there is interposed a driver motor DM and a movement transducer interface ITD, it is associated with the file module MA with a diskette driver DD and it is associated with the centering module MC with a camera inter­face IC, a lens illuminating camera CIL, connected to a light point FL and a driver motor blocker DMB.
  • Access is Obtained through the machine sensitive key­board to: retrieval of work or prescription to be performed, working with or without physical template, selection of most appropriate type of rough grinding, selection of suitable operating pressure, selection of bevelling programme, vari­ation of parameters, opening or closing of clamps holding the lenses, selection of most appropriate holding pressure and raising or lowering the protective cover.
  • Operative and maintenance messages are received through the bevelling screen, such as: print-out of pending jobs, chosen job, number of lenses worked, cooling circuit cleaning warnings, etc.
  • the work pressure may be programmed at will although, as a safety measure, the lens always makes a first contact with the grind wheel with a minimum pressure which is pro­gressively increased up to the programmed pressure.
  • the holding pressure is selective, with the lens being taken hold of at a low pressure, with the pro­grammed pressure being applied at the onset of the work cycle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)
EP19900500100 1989-10-27 1990-10-25 Machine pour biseauter des lentilles Expired - Lifetime EP0432078B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES8903634 1989-10-27
ES8903634A ES2017183A6 (es) 1989-10-27 1989-10-27 Maquina biseladora para lentes.

Publications (3)

Publication Number Publication Date
EP0432078A2 true EP0432078A2 (fr) 1991-06-12
EP0432078A3 EP0432078A3 (en) 1991-10-16
EP0432078B1 EP0432078B1 (fr) 1994-07-06

Family

ID=8264543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900500100 Expired - Lifetime EP0432078B1 (fr) 1989-10-27 1990-10-25 Machine pour biseauter des lentilles

Country Status (3)

Country Link
EP (1) EP0432078B1 (fr)
DE (1) DE69010466T2 (fr)
ES (2) ES2017183A6 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2707107A1 (fr) * 1993-06-28 1995-01-06 Takubo Seiki Seisakusho Kk Instrument de mesure de forme de lentille.
WO1999022906A1 (fr) * 1997-10-31 1999-05-14 Wernicke & Co. Gmbh Dispositif permettant de mesurer un gabarit a forme donnee
EP1352712A3 (fr) * 2002-04-08 2003-10-22 Hoya Corporation Méthode pour trouver la courbure et la position d'un chanfrein, ainsi que méthode et appareil pour usiner une lentille
FR2851947A1 (fr) * 2003-03-07 2004-09-10 Essilor Int Procede d'usinage d'une lentille ophtalmique.
CN105127860A (zh) * 2015-09-03 2015-12-09 黄河科技学院 建筑瓷砖表面图案喷印、烘干、磨边生产线

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Publication number Priority date Publication date Assignee Title
US2749671A (en) * 1951-04-06 1956-06-12 American Optical Corp Edge grinding machines
US3745720A (en) * 1970-09-02 1973-07-17 M Savage Lens edge-grinding, finishing and beveling machine
US3894361A (en) * 1974-09-03 1975-07-15 Dimelp Optical Co Inc Lens grinding machine
GB2068797A (en) * 1980-02-13 1981-08-19 Takubo T Lens grinding machine and method
JPS5828601A (ja) * 1981-08-13 1983-02-19 Hitachi Metals Ltd タツチセンサ−
DE3325287A1 (de) * 1983-07-13 1985-01-31 Fried. Krupp Gmbh, 4300 Essen Verfahren zur messung von abstaenden und/oder zur konturerfassung von messobjekten, messgeraet und anwendung dieses verfahrens
DE3537267A1 (de) * 1984-11-24 1986-05-28 Schöne Optik Maschinenfabrik GmbH, 4054 Nettetal Brillenglasrandschleifmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749671A (en) * 1951-04-06 1956-06-12 American Optical Corp Edge grinding machines
US3745720A (en) * 1970-09-02 1973-07-17 M Savage Lens edge-grinding, finishing and beveling machine
US3894361A (en) * 1974-09-03 1975-07-15 Dimelp Optical Co Inc Lens grinding machine
GB2068797A (en) * 1980-02-13 1981-08-19 Takubo T Lens grinding machine and method
JPS5828601A (ja) * 1981-08-13 1983-02-19 Hitachi Metals Ltd タツチセンサ−
DE3325287A1 (de) * 1983-07-13 1985-01-31 Fried. Krupp Gmbh, 4300 Essen Verfahren zur messung von abstaenden und/oder zur konturerfassung von messobjekten, messgeraet und anwendung dieses verfahrens
DE3537267A1 (de) * 1984-11-24 1986-05-28 Schöne Optik Maschinenfabrik GmbH, 4054 Nettetal Brillenglasrandschleifmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 105 (P-195)[1250], 7th May 1983; & JP,A,58 028 601 (HITACHI KINZOKU K.K.) 19-02-1983, the whole document. *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2707107A1 (fr) * 1993-06-28 1995-01-06 Takubo Seiki Seisakusho Kk Instrument de mesure de forme de lentille.
WO1999022906A1 (fr) * 1997-10-31 1999-05-14 Wernicke & Co. Gmbh Dispositif permettant de mesurer un gabarit a forme donnee
EP1352712A3 (fr) * 2002-04-08 2003-10-22 Hoya Corporation Méthode pour trouver la courbure et la position d'un chanfrein, ainsi que méthode et appareil pour usiner une lentille
US6887134B2 (en) 2002-04-08 2005-05-03 Hoya Corporation Method for deciding a bevel curve, method for determining a locus of a bevel, method for processing a lens and apparatus for processing a lens
US6935924B2 (en) 2002-04-08 2005-08-30 Hoya Corporation Method for deciding a bevel curve, method for determining a locus of a bevel, method for processing a lens and apparatus for processing a lens
US7083498B2 (en) 2002-04-08 2006-08-01 Hoya Corporation Method for deciding a bevel curve, method for determining the locus of a bevel, method for processing a lens and apparatus for processing a lens
US7083499B2 (en) 2002-04-08 2006-08-01 Hoya Corporation Method for deciding a bevel curve, method for determining the locus of a bevel, method for processing a lens and apparatus for processing a lens
US7125315B2 (en) 2002-04-08 2006-10-24 Hoya Corporation Method for deciding a bevel curve, method for determining the locus of a bevel, method for processing a lens and apparatus for processing a lens
EP2052814A1 (fr) * 2002-04-08 2009-04-29 Hoya Corporation Procédé pour décider d'une courbe latérale, procédé pour décider du locus d'un biseau, procédé de traitement de lentille et appareil de traitement de lentille
FR2851947A1 (fr) * 2003-03-07 2004-09-10 Essilor Int Procede d'usinage d'une lentille ophtalmique.
WO2004080652A1 (fr) * 2003-03-07 2004-09-23 Essilor International (Compagnie Generale D'optique) Procede d’usinage d’une lentille ophtalmique et machine d’usinage pour mettre en oeuvre la methode precedente
CN105127860A (zh) * 2015-09-03 2015-12-09 黄河科技学院 建筑瓷砖表面图案喷印、烘干、磨边生产线

Also Published As

Publication number Publication date
DE69010466D1 (de) 1994-08-11
EP0432078A3 (en) 1991-10-16
EP0432078B1 (fr) 1994-07-06
ES2017183A6 (es) 1991-01-01
ES2055893T3 (es) 1994-09-01
DE69010466T2 (de) 1994-10-20

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