WO2000012261A1 - Procede de realisation d'un verre correcteur a foyers multiples, et systeme de mise en oeuvre d'un tel procede - Google Patents
Procede de realisation d'un verre correcteur a foyers multiples, et systeme de mise en oeuvre d'un tel procede Download PDFInfo
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- WO2000012261A1 WO2000012261A1 PCT/FR1999/002054 FR9902054W WO0012261A1 WO 2000012261 A1 WO2000012261 A1 WO 2000012261A1 FR 9902054 W FR9902054 W FR 9902054W WO 0012261 A1 WO0012261 A1 WO 0012261A1
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Classifications
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- 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
-
- 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
- B24B13/0012—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for multifocal lenses
-
- 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 present invention relates to the production of corrective glasses with multiple focal points, in particular intended for the manufacture of optical glasses for glasses for improving human vision when the correction required varies according to the distance from the object observed.
- This is the case of the correction of presbyopia, which leads, in known manner, mainly to double or triple focal lenses (so-called bi-focal or tri-focal lenses), or to lenses with progressively variable focal length from point to point of the lens (commonly called progressive lenses).
- the invention relates in particular to a method for producing such lenses, as well as to a system for implementing such a method, namely in particular an automated system for producing a corrective lens, controlled by a processing system. of recorded program information.
- the main lens is used to obtain the correction in far vision
- the auxiliary lens adds a complementary correction to it to obtain the correction in close vision.
- the two corrections are obtained essentially by the relative values of the refractive indices, without requiring a difference in radius of curvature.
- the variation in overall power is easy to make progressive from one point to another of the glass by varying the thickness of the layers of different indices.
- the glasses thus produced are not however free from drawbacks.
- the transition from distant vision to close-up vision causes image jumps which are disturbing for the user and which cannot be avoided.
- triple focus glasses we may prefer triple focus glasses, but this is to the detriment of the aesthetics, since we return to notable variations in thickness.
- the typical correction ranges for focal lengths are 0.3 m to 0.5 m for close vision, 0.5 m to 1 m for intermediate vision, and 2 m to infinity for far vision.
- the invention aims mainly to improve the visual comfort adapted to each without thereby detracting from the desired aesthetics. It also aims, in doing so, to comply with the best conditions of industrial feasibility, in particular by proceeding from semi-finished glasses such as those currently available and by means of materials which are convenient to use at low cost.
- the invention essentially proposes, in a method of manufacturing vision correcting glasses having an addition of power for the correction of near vision relative to far vision, to perform mechanical machining of a internal face of each lens, in reduction of its thickness, which adds a prismatic deviation, calculated as a function of an individual distance between a center for application of far vision and a center for application of near vision, for bring the near vision correction optical center as close as possible to the near vision application center.
- the prismatic deviation to be ensured is variable between 0.5 and 1.5 diopters. At its simplest, it is applied single, centered along the axis of movement of the gaze between far vision and near vision. It is then obtained all the more easily, by interposing a shim appropriately sized between the semi-finished lens and its support to cause an offset of the machining axis by spherical milling on the internal face of the glass.
- the subject of the invention is in particular a method for producing a corrective glass with multiple focal points, in particular for glasses, from a semi-finished glass with determined optical characteristics, said semi-finished lens comprising a first concave curved face and a second convex curved face, and being provided with at least a first positioning marker M, associated with a correction A, called far vision correction, and a second positioning marker AT ', associated with an additive correction B, called close vision correction, both located on said convex face and constituted by points, characterized in that it comprises at least one step of surfacing by removing material over a determined depth of l 'one of said faces using abrasive machining means moving in translation along a first axis, in that said surfacing step comprises the presentation of said semi-finished glass in front of the machining means, such that a second axis, orthogonal to a plane tangent to the point constituting said first positioning mark M is inclined by an angle determined with respect to said first axis
- ⁇ ' (M' XA) + YX (A + B) with MM 1 the distance in centimeters separating said points M and M ', A and B said corrections, expressed in diopters, and y the distance in centimeters separating point M 'from the optical center in close-up view of said correcting lens.
- FIG. 1 illustrates the principle of one addition by index variation in a conventional bi-focal corrective lens
- FIG. 2A and 2B illustrate an example of semi-finished glass, from which the final corrective glass according to the invention is made, in front and side views respectively;
- FIG. 4 schematically illustrates a preliminary step to the surfacing of a semi-finished glass, consisting of fixing it on a support;
- FIG. 5 illustrates a progressive corrective lens and the various optical references which characterize it
- FIG. 6A and 6B schematically illustrate examples of bifocal corrective lenses, without and with deflection prism respectively;
- FIG. 7A schematically illustrate, in front view, a double focus glass and a triple focus glass, intended for the correction of one right eye;
- FIG. 8A and 8B schematically illustrate surfacing devices, according to two alternative embodiments of a system according to the invention.
- FIG. 9 schematically illustrates an automated surfacing system controlled by a data processing system 1 recorded program.
- the problem encountered at the origin of the present invention is understood by considering a lens correcting the vision of a presbyopic individual, produced in the form of a bifocal lens as shown diagrammatically in FIG. 1, and the positions of the centers optical.
- This lens L is assumed to be composed of two lenses: a main lens i, the optical characteristics of which are defined for distant vision, and an auxiliary lens L2, of smaller size and of different index, attached to the front face of the lens L ( external face on a pair of glasses), which introduces an additive correction necessary in close vision.
- a main lens i the optical characteristics of which are defined for distant vision
- an auxiliary lens L2 of smaller size and of different index, attached to the front face of the lens L ( external face on a pair of glasses), which introduces an additive correction necessary in close vision.
- the optical centers of the two lenses are not confused, but offset in the vertical direction here 0 Y, supposed to correspond to the direction of movement of the gaze when the user switches from distant vision (in principle to the center of the finished lens) to a close-up vision (in principle oriented downwards), and vice versa.
- punctual marks M and M ' respectively in correspondence with the optical centers of the two lenses L and 2 •
- the point M materializes what 1' is called the application center of far vision, and point M 'the center application of near vision. Note that in the case of a progressive lens, it is not possible to isolate physically distinct lenses.
- M is then defined as being the center from which the progression starts and M 'the center of end of progression.
- industrially produced semi-finished glasses usually consist of circular lenses 1, as shown diagrammatically in FIGS. 2A and 2B, in front and side view, respectively.
- the difference in elevation from the main lens to the auxiliary lens is not visually sensitive.
- the front or external face, fe appears convex curved according to an appropriate radius of curvature, and the internal surface, fi, has a concave curvature parallel to the external face.
- the external face fe shows various marks, intended to guide the production of the final corrective glass, by surface machining in thickness reduction according to a process which will be detailed below.
- FIGS. 3A and 3B schematically represent corrective lenses, referenced LJJ and Lg, intended respectively for the right eye and the left eye of a spectacle wearer.
- the references M ⁇ , MQ, M 'D and M 1 G have the same meaning as the references M and M', but they are associated with the right eye and the left eye respectively.
- MO ' is not normally zero.
- This drawback can be remedied, in particular with regard to progressive lenses, by creating an induced prism effect, as will now be described.
- a corrective lens is produced by machining a semi-finished lens (see FIGS. 2A and 2B), advantageously chosen from a standard range, depending on the amplitude of the corrections to be obtained.
- the semi-finished glass 1 as shown diagrammatically in FIG. 4, is placed on a support 2 comprising a main body 20, substantially cylindrical, surmounted by an annular crown 21, forming a receptacle for the external face (convex in the example in Figure 4).
- the semi-finished glass 1 is blocked by bonding using fusible metal.
- Positioning is carried out using the marks on the surface of the external face fe (see FIG. 2A).
- the cylindrical body 20 and the annular ring 21 can comprise a channel 22 which pierces them right through, of axis An. The point M can therefore be seen from the front and from the back and positioned in the center of the opening of channel 22.
- a wedge-shaped wedge 3 is inserted between the external face fe and the crown 21, the role of which is to induce in the glass finally obtained a prismatic optical deviation. Therefore, the axis A 'H, orthogonal to the plane tangent to the surface of the external face fe at M, forms an angle ⁇ with the axis AH- It should be noted here that in practice, the wedge 3 n is not a solid object. It is preferably materialized by three points of which it is possible to control adjustable displacements to modify the orientation and the angle of the prism.
- a surface treatment is then carried out on the internal face. (concave).
- the glass 1 and support 2 assembly is presented to a machine tool (not shown), the support being locked in a receiving member and moving a priori along the axis AH- DU because the glass 1 is inclined relative to this axis AH, the desired prism is reproduced, during the machining operation, with an angle at the top as a function of that of the wedge, but in the opposite direction.
- the value of the added prism is calculated so that the position of 0 'is optimized. In this way, it ensures, in addition to good compatibility with the technological means currently available in the optical industry, an instantaneous and comfortable close reading whatever the correction in far vision and the necessary addition, for the glasses. progressive in particular. All research effort is avoided, the reading application center being immediately in its ideal position.
- the distortions in close vision are very attenuated and the intermediate visions instantaneous. The transition from distant vision to intermediate and / or close vision takes place without image jump, whatever the type of corrective lens, with double or triple focus or with progressively variable corrective power.
- the points 0 and M are merged and the position of 0 'is given by the relation (1).
- the points M 'and 0' are, if not confused, at least very close to each other.
- the prism must be in the lower base, i.e. positive, for a lens associated with a positive A correction, and in the upper base, i.e. negative, for a lens associated with a negative A correction .
- FIGS. 6A and 6B schematically illustrate examples of corrective bifocal lenses, L ⁇ JF and 'DF, respectively without vertical prism and with vertical prism.
- the scales are not respected, to better highlight the prismatic configuration of the corrective lens L'JJF of FIG. 6B.
- ⁇ D xd (3), in which D is the power in diopters and d the distance in centimeters, make it possible to express the prismatic deviation ⁇ of the corrective lens of the invention (for example the DF of FIG. 6B), as a function of MM ' t B and A, so that the points 0 "and M' are merged.
- the calculation of the prismatic deviation thus induced can be further simplified by admitting that the difference between center of application of near vision and center of application of far vision on the lens is the same for all individuals requesting the same correction (distant vision and addition for close vision) with the same type of multifocal or progressive lens.
- FIG. 7A schematically illustrates, in front view, a bifocal lens 4 intended for the correction of the right eye. It includes two distinct areas: the main lens 40 and a small area 41, called the "patch", constituting the near vision area. Also shown in this FIG. 7A are the points M and M ', located in the zones 40 and 41, respectively.
- AOD and AOG the corrections to be made for the right eye and the left eye respectively, the inclination ⁇ of the axes MM 'being assumed to be + 8 degrees and - 8 degrees relative to the vertical, AOD and AOG obey conventionally to the following two relationships (the angles being expressed in degrees and AOD and AOG in diopters):
- ⁇ is the angle of the axis of astigmatism
- SPH the value of the sphere of the corrective lens
- CYL the value of the astigmatism of the corrective lens
- the prism to be added is typically given by the relation:
- ⁇ ' A (10), for a distance MM' usually equal to 10 mm.
- FIG. 7B schematically illustrates, in front view, a triple focal lens 5 intended for the correction of the right eye. It comprises three distinct zones: the main lens 50 and two superimposed zones of small dimensions 51 and 52, intended to provide intermediate vision and close vision, respectively.
- the points M and M ′ situated in the zones 50 and 52, respectively, have been represented.
- the distance separating M from M ' is, on average, typically 16 mm. The relation (10) therefore becomes:
- the method of the invention applies equally well to progressive lenses. It is even the preferred case of application of the invention, since the advantages obtained in improving visual comfort for an appreciated aesthetic while respecting industrial feasibility are particularly sensitive to it.
- the prismatic deviation that is added to the traditional semi-finished glass, calculated as a function of the distance MM '(translating the individual angular difference between near vision and far vision) and the addition of power between far vision and near vision, has the consequence, by bringing 0 '(optical center in near vision) of M' as intended by the invention, on the other hand to move the optical center 0 away from point M.
- Such glasses have already been shown in Figures 3A and 3B.
- the projection of the center of the pupil on the glass was made to appear in PD.
- the distance between PD and M D is, on average, 2 mm.
- the distances between MD and M'D and PD M'D are 14.5 and 16.5 mm respectively.
- M 'D is shifted 2 mm inwards.
- the distance between the points PD and M 'D of 16.5 mm corresponds to a vertical angle of rotation of the eye to pass from distant vision to close vision of the order of 37 to 38 degrees.
- same values are found for the corrective lens intended for the left eye (Figure 3B: LG).
- the MDM 'D axis is substantially vertical, as for bi-focal and tri-focal lenses, but with a slightly stronger angle of deviation from the vertical, typically 12 degrees.
- the formulas (8) and (9) then become:
- the glasses are made from semi-finished glasses sold by various companies.
- the manufacture of these glasses does not come directly within the scope of the invention.
- the step of surfacing the glass to obtain characteristics in accordance with the expected result, in particular so that relation (4) is satisfied, remains entirely compatible with the technologies used in the known art, which represents a definite advantage.
- the value of the prism ⁇ is identical to the value ⁇ '.
- the value of this prism therefore obeys relations (10) or (11), depending on whether it is a bi-focal lens or a tri-focal lens.
- the final corrective glass can be obtained by a surfacing process which is entirely compatible with those used in the known art.
- FIG 8A illustrates one of the commonly used methods.
- a machine tool 6, known as a surface generator, is used.
- This comprises a cutter, 60, the abrasive front face 62 of which advantageously has a diameter substantially equal to or greater than that of the semi-finished glass 1 (conventionally circular) and of radius of curvature equal to that of its convex face fe.
- the body 20 of the support 2 of the semi-finished glass 1 is locked in jaws 63, or any similar member, of a fixed support (not shown), mechanically coupled to the machine tool 6.
- the cutter 60 is placed at the end of a rotary axis 61, the axis of symmetry of which coincides with the axis of symmetry AH of the support 2.
- the cutter When the cutter advances in translation along this axis AH, it will attack the concave face fi of the glass 1. As this is inclined at an angle ⁇ relative to the axis AH, the surfacing process results in a withdrawal of material, on the one hand, but also by the creation of a prism in the glass in the opposite direction with the wedge 3. The attack on the glass 1 continues until a predetermined corrective glass thickness is obtained, in a manner well known in itself.
- the cutter 60 is made of diamond material and rotates at a typical speed of 4500 revolutions / minute.
- the following operation consists, in a manner known per se, of performing a smoothing and polishing of the two surfaces, fe and fi, possibly but not necessarily returned to the normal position, that is to say the glass not inclined, and identically for these two surfaces. These operations do not make any significant modification to the correction values obtained during the surfacing step. It is also possible to carry out surface treatments of the glasses, on their external face fe, such as an anti-reflective treatment.
- the glass is cut according to a predetermined template.
- the final lenses do not have to be circular.
- the corrective lenses, right and left, are cut to the shape of the frame of glasses which must receive them.
- a physical prismatic wedge is introduced which will induce an inverse prism in the glass, of strictly identical value for bi-focal or tri-focal glasses, or of approximate value for glasses progressive.
- the same effect can be obtained without introducing a prism.
- the semi-finished glass has an axis of symmetry coincident with that of the support 2 and if the milling axis is inclined relative to this axis, the same effect is obtained as previously.
- FIG. 8B schematically illustrates this milling process.
- the shaft 61 supporting the cutter body 60 rotates around an axis A "forming an angle ⁇ with the axis AH-
- the device of FIG. 8A is therefore perfectly dual to the device of FIG. 8B. It must be understood that it is a relative inclination of the axes A and A "H, the latter possibly remaining horizontal. It may indeed be easier to appropriately tilt the support holder 63 than the rotary shaft 61 of the machine tool 6. It is also possible to combine the two methods.
- another known method consists of wedging the semi-finished glass using three points integral with the support, and at least one of which is of different length from the other two. It follows that the semi-finished glass is carried by a tripod and that it is presented to the cutter in an inclined manner, as before. If the three points are of equal lengths, a variant similar to the variant in FIG. 8B can be implemented.
- the steps of machining the semi-finished glass and producing a prism of predetermined value can be made fully automatic.
- FIG. 9 schematically illustrates a complete system authorizing such automation.
- the cutter-holder shaft 60 is driven by a first rotary motor 64.
- the support 66 of this motor is mechanically coupled to a second rotary motor 68, for example by means of a set of gears comprising a screw end or a rack 67 (or any similar device) driving the support 66 along a horizontal axis AH-
- a stepping motor instead of the set of rack gears 67 and the rotary motor 68.
- a slide device is provided fixed on a flat support (not shown), or a similar device, so as to guide the horizontal translation of the motor 64 and to support it.
- the semi-finished glass, of axis of symmetry A symmetry A ′ H is made integral with a support, here referenced 2 ′.
- the support 2 ' is itself carried by a motorized positioning device. It is positioned in space so that the point M is on the horizontal axis AH (horizontal axis and axis of symmetry of the shaft 61) and that the axis of symmetry A 'H of the semi-finished glass 1 form an angle of predetermined value ⁇ . This angle ⁇ is such that 1 'will obtain the value of induced prism ⁇ ' satisfying one of the above relationships.
- the support 2 'enjoy two degrees of freedom: possibility of rotation around a horizontal axis, orthogonal to the axis AH, to obtain the angle of inclination ⁇ , and translation along the axis A 'H to be able to place the point M on the axis AH-
- the various motorized members are controlled by a data processing system with recorded program 8, comprising, for example, a general-purpose microcomputer provided with one or more specific cards (not shown), provided with input ports. appropriate outputs to which the various motorized components are connected, by specialized or standard connections (parallel, series).
- a data processing system with recorded program 8 comprising, for example, a general-purpose microcomputer provided with one or more specific cards (not shown), provided with input ports. appropriate outputs to which the various motorized components are connected, by specialized or standard connections (parallel, series).
- the information processing system is a microcomputer 8 provided with standard peripherals, in particular a display screen 81, a keyboard 80, and a floppy disk drive 82.
- a display screen 81 for example, a liquid crystal display
- a keyboard 80 for example, a liquid crystal display
- a floppy disk drive 82 for example, a hard disk drive
- the link l ⁇ transmits instructions to one member 7 controlling the positioning of the support 2 'in rotation and in translation.
- the latter is associated with one or more conventional sensors, in particular position sensors (not shown), for example of an opto-electronic type. These sensors allow, among other things, to determine the position in space of the semi-finished glass 1. To do this, knowing the exact position of the horizontal axis AH which is fixed, we can use the benchmarks (see FIG. 2A) worn on the surface fe of the semi-finished glass 1. It is in particular possible to carry out an otic reading of the position in space of these marks, or marks.
- an additional link 12 transmits to the microcomputer the result of the measurements carried out.
- the latter can therefore, via the link l ⁇ , control in real time the movement of the semi-finished glass 1, so that the aforementioned positioning requirements are satisfied and block it in the position reached, so as to what it is presented to the strawberry 60 with the desired inclination ⁇ .
- the links l and I2 can be merged into a single bidirectional link.
- the microcomputer 8 controls the operation of the motor 64 by the link 13. It can be instructions for a simple on-off control or instructions also controlling the speed of rotation of the motor 64.
- the microcomputer 8 controls the forward and backward translation of the cutter 60, along the axis AH, this by means of the motor 68 and the worm 67 acting on the base 66 of the motor 64 ( in the example described). To do this, provision is made for a link I5 transmitting the forward or reverse operating instructions to the motor 68. It is also necessary to provide a position sensor (not shown) transmitting data relating to the position reached at all times by the cutter 60 It may be an electromechanical transducer or an opto-electronic transducer: coded wheel, etc., coupled to the worm screw 67. If the motor 68 is of the stepping type, there are generally digital data representing the position of the actuator acting on the base 66 of the motor 64.
- a link I 4 conveys the position measurement signals of the cutter 60 along the axis AH-
- the unidirectional links, I4 and 15, can be combined into a single bidirectional link.
- connections, l ⁇ I3 and I4 for the control of motorized components, 7, 64 and 68, do not normally carry electrical power signals, but that they act on electromechanical switches (relays, etc. ) and / or electronic (semiconductor switches, etc.) disposed between conventional electrical and / or fluid supply circuits (not shown) and these motorized members.
- the microcomputer 8 records, in the mass memory (hard disk, not shown) with which it is usually provided, data and program instructions for the production of corrective lenses, in particular for the step of machining by surfacing. Even more particularly, in accordance with the main characteristic of the invention, it records the data and instructions necessary for obtaining an induced prism in the glass corresponding to relation (4), in general, and to the one or the other of the specific relationships (10), (11) or (14), more particularly, depending on the type of corrective lens to be obtained (bi-focal, tri-focal or progressive).
- the data and program instructions can be entered initially by hand using the keyboard 80, or better still by reading a DK diskette (diskette drive 82) or any other magnetic or optical medium, provided that the microcomputer 8 is provided with an appropriate reader. You can still enter the data and instructions in the microcomputer by download, via a modem. This arrangement is particularly advantageous if the place of manufacture of corrective lenses is in a store dependent on a chain.
- the programs and the application data can then be developed centrally and be available in real time, by simply querying a central database made available to all members, either for the production of corrective lenses proper , either to initialize or update a local database.
- the recorded order program and / or the data associated with it can be easily modified or updated, for example to take into account the availability of new types of semi-finished glasses, or quite simply to correct errors in the program or improve performance. Such modifications are also necessary when changing the machine tool or when replacing some of the components of the machining chain. This feature adds to the flexibility of the process.
- an operator enters the parameters necessary for carrying out the surfacing step of the corrective lens to be produced, taking into account all the parameters associated with this step: characteristics of the basic semi-finished lens, type of corrective lens and values of the corrections to be obtained (A, B), angular deviation ⁇ to obtain the prism ⁇ ', possibly the corrective parameters for the progressive lenses (or at least the indication that such corrections must be introduced, the program then automatically introducing).
- the data and instructions entered are displayed on the screen 81, in text and / or graphic form.
- the program can display a menu in the form of questions which the operator must answer to fully define the corrective lens he wishes to make.
- the program can display on screen 81 the characteristics or the model of the semi-finished glass to be used if these data were not entered in the previous step.
- This surfacing step is carried out in the manner previously described, by bidirectional exchanges of data and / or instructions, via the various links, II to I5, between the microcomputer 8, the motorized members, 7, 64 and 68, which 'it controls, and the sensors, in particular of position, associated with these motorized members.
- the semi-finished glass 1, for example a support of the tri-point type. It is only necessary that the axes of symmetry of the semi-finished glass 1 and of the cutter 60 form a determined angle ⁇ , so as to induce a prism in the glass which verifies the relation (4), which allows the points to be confused. M ', 0' and 0 ", or to get closer when the relation (7) is verified).
- the method is also compatible with the production of glasses correcting astigmatism, by playing on relations (8) and (9), or (12) and (13).
- the invention does achieve the goals that it has set itself.
- the production process comprising a surfacing step, makes it possible to obtain multi corrective lenses.
- fireplaces including double fireplaces, triple fireplaces and progressive, and brings many benefits.
- These corrective lenses do not exhibit, in particular, the unpleasant phenomenon of image jump when switching from one vision mode to another (distant vision with close vision, for example). Distortions in close vision are imperceptible. They offer great reading comfort and instant adaptation.
- the production process remains compatible with the technologies of the known art and allows the use, as base material, of semi-finished glasses commonly available commercially and chosen from a standard range.
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- Mechanical Engineering (AREA)
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- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69909489T DE69909489D1 (de) | 1998-08-28 | 1999-08-27 | Verfahren und vorrichtung zum herstellen einer multifokalen korrekturlinse |
EP99940243A EP1107849B1 (fr) | 1998-08-28 | 1999-08-27 | Procede de realisation d'un verre correcteur a foyers multiples, et systeme de mise en oeuvre d'un tel procede |
US09/763,795 US6382790B1 (en) | 1998-08-28 | 1999-08-27 | Method for producing a multifocal correction lens, and system for implementing same |
AU54264/99A AU5426499A (en) | 1998-08-28 | 1999-08-27 | Method for producing a multifocal correction lens, and system for implementing same |
CA002341584A CA2341584A1 (fr) | 1998-08-28 | 1999-08-27 | Procede de realisation d'un verre correcteur a foyers multiples, et systeme de mise en oeuvre d'un tel procede |
AT99940243T ATE244618T1 (de) | 1998-08-28 | 1999-08-27 | Verfahren und vorrichtung zum herstellen einer multifokalen korrekturlinse |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR98/10803 | 1998-08-28 | ||
FR9810803A FR2782663B1 (fr) | 1998-08-28 | 1998-08-28 | Procede de realisation d'un verre correcteur a foyers multiples, et systeme de mise en oeuvre d'un tel procede |
Publications (1)
Publication Number | Publication Date |
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WO2000012261A1 true WO2000012261A1 (fr) | 2000-03-09 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/FR1999/002054 WO2000012261A1 (fr) | 1998-08-28 | 1999-08-27 | Procede de realisation d'un verre correcteur a foyers multiples, et systeme de mise en oeuvre d'un tel procede |
Country Status (8)
Country | Link |
---|---|
US (1) | US6382790B1 (fr) |
EP (1) | EP1107849B1 (fr) |
AT (1) | ATE244618T1 (fr) |
AU (1) | AU5426499A (fr) |
CA (1) | CA2341584A1 (fr) |
DE (1) | DE69909489D1 (fr) |
FR (1) | FR2782663B1 (fr) |
WO (1) | WO2000012261A1 (fr) |
Families Citing this family (8)
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DE10349721A1 (de) * | 2003-10-23 | 2005-06-09 | Rodenstock Gmbh | Individueles Brillenglas |
ES2483171T3 (es) * | 2007-01-25 | 2014-08-05 | Rodenstock Gmbh | Puntos de referencia para orto posición |
JP2012531621A (ja) * | 2009-06-26 | 2012-12-10 | クインタナ,アレハンドロ アルトゥロ ゲーベル | 余剰内部光学材料を有するワンピースレンズ |
DE102010007267B4 (de) | 2010-02-08 | 2020-09-03 | Carl Zeiss Vision International Gmbh | Linsenelement mit verbesserter prismatischer Wirkung sowie Verfahren zur Herstellung eines Linsenelements |
PL2724815T3 (pl) * | 2012-10-29 | 2014-10-31 | Essilor Int | Sposób obróbki skrawaniem powierzchni soczewki optycznej |
EP3031390B1 (fr) * | 2013-08-07 | 2019-08-21 | Bio Echo Net Inc | Thermomètre infrarouge |
PT3608055T (pt) * | 2018-08-10 | 2024-03-20 | Essilor Int | Método de maquinagem de uma superfície óptica de uma lente óptica |
WO2022165739A1 (fr) * | 2021-02-05 | 2022-08-11 | 广东工业大学 | Procédé et appareil de polissage intelligent de robot reposant sur une fusion visuelle 2d/3d pour du matériel |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2310925A (en) | 1939-10-11 | 1943-02-16 | American Optical Corp | Process of making lenses |
US2869455A (en) | 1955-12-12 | 1959-01-20 | Bull Sa Machines | Electromechanized actuating means in wire printing machines |
US2869422A (en) * | 1953-11-25 | 1959-01-20 | En Commandite Simple Et En Nom | Multifocal lens having a locally variable power |
US5430504A (en) | 1991-08-02 | 1995-07-04 | Hecht Contactlinsen Gmbh | Bifocal contact lenses |
-
1998
- 1998-08-28 FR FR9810803A patent/FR2782663B1/fr not_active Expired - Fee Related
-
1999
- 1999-08-27 WO PCT/FR1999/002054 patent/WO2000012261A1/fr active IP Right Grant
- 1999-08-27 US US09/763,795 patent/US6382790B1/en not_active Expired - Fee Related
- 1999-08-27 DE DE69909489T patent/DE69909489D1/de not_active Expired - Lifetime
- 1999-08-27 CA CA002341584A patent/CA2341584A1/fr not_active Abandoned
- 1999-08-27 AU AU54264/99A patent/AU5426499A/en not_active Abandoned
- 1999-08-27 EP EP99940243A patent/EP1107849B1/fr not_active Expired - Lifetime
- 1999-08-27 AT AT99940243T patent/ATE244618T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2310925A (en) | 1939-10-11 | 1943-02-16 | American Optical Corp | Process of making lenses |
US2869422A (en) * | 1953-11-25 | 1959-01-20 | En Commandite Simple Et En Nom | Multifocal lens having a locally variable power |
US2869455A (en) | 1955-12-12 | 1959-01-20 | Bull Sa Machines | Electromechanized actuating means in wire printing machines |
US5430504A (en) | 1991-08-02 | 1995-07-04 | Hecht Contactlinsen Gmbh | Bifocal contact lenses |
Also Published As
Publication number | Publication date |
---|---|
EP1107849A1 (fr) | 2001-06-20 |
CA2341584A1 (fr) | 2000-03-09 |
FR2782663A1 (fr) | 2000-03-03 |
FR2782663B1 (fr) | 2000-11-17 |
ATE244618T1 (de) | 2003-07-15 |
US6382790B1 (en) | 2002-05-07 |
EP1107849B1 (fr) | 2003-07-09 |
AU5426499A (en) | 2000-03-21 |
DE69909489D1 (de) | 2003-08-14 |
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