EP0510462A1 - Machine pour biseauter des lentilles - Google Patents

Machine pour biseauter des lentilles Download PDF

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Publication number
EP0510462A1
EP0510462A1 EP92106267A EP92106267A EP0510462A1 EP 0510462 A1 EP0510462 A1 EP 0510462A1 EP 92106267 A EP92106267 A EP 92106267A EP 92106267 A EP92106267 A EP 92106267A EP 0510462 A1 EP0510462 A1 EP 0510462A1
Authority
EP
European Patent Office
Prior art keywords
lens
corner
chamfering
periphery
angle
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
EP92106267A
Other languages
German (de)
English (en)
Other versions
EP0510462B1 (fr
Inventor
Susumu Hagiwara
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.)
Nikon Corp
Original Assignee
Nikon Corp
Nippon Kogaku KK
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 Nikon Corp, Nippon Kogaku KK filed Critical Nikon Corp
Publication of EP0510462A1 publication Critical patent/EP0510462A1/fr
Application granted granted Critical
Publication of EP0510462B1 publication Critical patent/EP0510462B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 present invention relates to a lens chamfering method for chamfering a corner defined by a lens plane and a peripheral ground plane of a lens to be ground, and a lens chamfering machine by implementing the same.
  • a lens grinding machine as shown in Figs. 17 and 18 Japanese Laid-Open Patent Application No. 56-15984 has been known as a prior art machine.
  • a lens 4 to be ground is held between lens shafts 2 and 3 of a main body 1 and the lens shafts 2 and 3 are rotated at a low speed while a cutting knife 6 driven by a motor 5 is moved toward the lens 4.
  • the press-contact of the cutting knife 6 to a peripheral surface of the lens 4 is controlled to coarsely grind the lens 4 into a shape of a lens frame of an eyeglasses frame on which the lens 4 is to be mounted.
  • a beveling grindstone 7 is abutted against the coarsely ground lens 4 and driven by a motor 8 so that the beveling grindstone 7 lightly contacts to the periphery of the lens 4 by its weight to form a bevel 4a in the periphery of the lens 4 as shown in Fig. 18. Since the lens 4 is rotated by the lens shafts 2 and 3, a distance from a center of the shaft to the contact area of the lens 4 to the beveling grindstone 7, that is, a dynamic radius varies with the rotation, but the beveling grindstone 7 is vertically swung by a pivotable arm 9 as the dynamic radius varies.
  • the lens 4 After such beveling, the lens 4 has corners a and b on the opposite sides of the bevel 4a.
  • the disclosed lens grinding machine uses a chamfering grindstone 10 having a smaller V-groove angle than that of the beveling grindstone 7, as shown in Fig. 18.
  • the chamfering grindstone 10 is attached to an output shaft of a motor 11 and a support plate 12 which supports the motor 11 is rotatably and axially movably mounted on a shaft 13.
  • chamfering In chamfering, an operator manually presses the support plate 12 to press the chamfering grindstone 10 to the bevel 4a of the lens 4 to chamfer the corners a and b.
  • the angles of inclination of the chamfering planes 10a and 10b of the chamfering grindstone are fixed.
  • the angle between the lens plane and the chamfered plane may be acute even after the chamfering. In this case, the chamfering makes no sense.
  • the lens chamfering machine of the present invention is characterized by the provision of a chamfering grindstone for chamfering a corner defined by a lens plane and a peripheral plane of a lens to be ground, a drive mechanism for driving at least one of the lens and the chamfering grindstone to change a relative positional relationship therebetween, and control means for calculating the relative positional relationship required to attain a desired shape of chamfer based on known data and/or measurement data on a shape of the lens to be ground and controlling the drive mechanism in accordance with the calculation.
  • control means calculates a direction which bisects the corner based on the known or measured angle of the corner, calculates a relative displacement along a direction containing that directional component, and controls the drive mechanism in accordance with the calculation.
  • Angle measurement means for measuring the angle of the corner may be provided in the lens chamfering machine.
  • the lens grinding machine of the present invention is characterized by the provision of the lens chamfering machine, a periphery grindstone for grinding a periphery of the lens to be ground, a drive mechanism for driving at least one of the lens and the periphery grindstone to change a relative positional relationship therebetween, and control means for activating the lens chamfering machine when the grinding by the periphery grindstone is completed.
  • the lens chamfering method of the present invention is characterized by the steps of determining a direction to bisect a corner defined by a lens plane and a peripheral ground plane of a lens to be ground based on known and/or measured data on a shape of the lens, and grinding the corner by relatively moving the chamfering grindstone to the lens along a direction containing the above directional component.
  • the control means calculates the relative positional relationship required to attain a desired shape of chamfer based on the known or measured data on the shape of the lens.
  • the drive mechanism drives at least one of the lens and the chamfering grindstone in accordance with the calculation to attain the desired shape of chamfer.
  • the corner defined by the lens plane and the peripheral ground plane of the lens is ground to the desired shape by the chamfering grindstone.
  • FIG. 1 shows an overall perspective view, partially developed, of the lens grinding machine in accordance with the present invention.
  • a support shaft 27 is axially movably fitted to a support bearing 26 which is secured to a main frame 21.
  • a base end of a head frame 22 is rotatably fitted to the support shaft 27 with a restriction in a thrust direction.
  • An end of the support shaft 27 is integrally engaged with a member 28 for laterally driving the head frame 22.
  • the laterally driving member 28 is supported by a shaft 31 so that it is slidable along an axis of the support shaft 27, and a rack 32 is fixed thereto.
  • the opposite ends of the shaft 31 are supported in parallel to the support shaft 27 by support members 30a and 30b secured to the main frame 21.
  • the rack 32 fixed to a side of the lateral driving member 28 engages with a pinion 33a coupled to a rotation shaft of a head frame lateral driving motor 33.
  • the lateral driving motor 33 When the lateral driving motor 33 is energized, the lateral driving member 28 is driven axially of the shaft 31 to drive the support shaft 27 which is integral with the lateral driving member 28 along its own axis.
  • the head frame 22 is driven axially of the support shaft 27 in accordance with the rotation of the lateral driving motor 33.
  • a vertical movement shaft 40 is vertically slidably fitted to a cylinder 43 secured to the main frame 21.
  • a roller 41 is rotatably mounted at an end of the vertical movement shaft 40 and it abuts against a buffer member 44 secured to a bottom of the head frame 22.
  • a rack 40a is formed axially of the vertical movement shaft 40 and it engages with a pinion 42a attached to a rotation shaft of a vertical driving motor 42 which is a pulse motor. As the vertical driving motor 42 rotates, the vertical movement shaft 40 is vertically driven and the head frame 22 is swung around the support shaft 27 by the roller 41 and the buffer member 44.
  • the head frame 22 is formed with a recess in which a member for holding a lens LE to be ground is mounted.
  • a lens press shaft 50b and a lens receive shaft 50a are coaxially and rotatably supported by the recess.
  • the lens press shaft 50b has a known holding mechanism (not shown) which holds the lens LE by the shafts 50b and 50a.
  • Pulleys 51a and 51b are mounted on the lens press shaft 50b and the lens receive shaft 50a, respectively, and a rotary shaft 56 having pulleys 53a and 53b at the opposite ends thereof is mounted on the head frame 22.
  • a gear 54 is attached to one end of the rotary shaft 56 and it engages with a pinion 55a mounted on a rotary shaft of a lens drive motor 55 which is a pulse motor.
  • Belts 52a and 52b are spanned between the pulleys 51a and 51b, and the pulleys 53a and 53b, respectively. As the lens driving motor 55 rotates, the lens LE is rotated.
  • a grindstone 23 and a grindstone driving motor 25 are arranged on the main frame 21.
  • Pulleys 71 and 72 are mounted thereon and they are coupled by a belt 73.
  • a lens shape measurement apparatus 100 and a lens chamfering machine 200 are arranged at predetermined positions on the main frame 21.
  • Fig. 2 shows a perspective view of an external view of the lens shape measurement apparatus
  • Fig. 3 is a III-III sectional view of Fig. 2.
  • Two guide rails 102a and 102b extend parallely along a Y direction on a base frame 101 and the opposite ends thereof are secured to the base frame.
  • a Y drive table 103 is slidably arranged on the guide rails 102a and 102b.
  • Two support members 110 and 111 are secured to the Y drive table 103, and parallel rails 113a and 113b having the opposite ends thereof secured to the support members 110 and 111 are spanned between the support members 110 and 111.
  • An X drive table 112 is slidably arranged on the parallel rails 113a and 113b.
  • a measurement shaft 121 extending along the Y axis is rotatably fitted to the X drive table 112, and the axial movement thereof is limited by rings 123 and 127 mounted on the measurement shaft 121.
  • a wave washer 128 is held between the ring 127 and the drive table 111, and a switch 129 is mounted at the bottom of the X drive table 112.
  • the ring 127 abuts against the switch 129 to turn it on.
  • the switch 129 is normally off because it receives a force of the wave washer 128 in the direction away from the switch 129.
  • a measurement device 120 is fixed to an end of the measurement shaft 121.
  • the measurement device 120 comprises a lens outer diameter measuring unit 120a, a lens plane optical axis position measuring unit 120b and a bevel measuring unit 120c.
  • a tension spring 104 for biasing the Y drive table 103 along the (-) Y direction is spanned between the Y direction drive table 103 and the base frame 101.
  • a rack 107 is formed at an end of the Y drive table 103 along the X direction and it is coupled with the Y drive motor 105 which is a pulse motor through a clutch 106.
  • a gear 106a is mounted on one rotary shaft of the clutch 106 and it engages with a pinion 105a mounted on the rotary shaft of the Y drive motor 105.
  • a pinion 106b mounted on the other rotary shaft of the clutch 106 engages with the rack 107.
  • the Y drive table 103 is pulled leftward in the drawing by the force of the tension spring 104 when the clutch 106 is disengaged.
  • the Y drive table 103 is moved along the Y direction as the Y drive motor 105 rotates.
  • a rack 108 is mounted at the other end of the Y drive table 103 along the X direction and it engages with a pinion 108a mounted on a rotary shaft of the encoder 109.
  • a displacement of the Y drive table 103 is detected by the decoder 109.
  • compression springs 114a, 114b, 114c and 114d are spanned between the X drive table 112 and the support members 110 and 111, and the X drive table 112 is nomally biased toward a neutral position in the X direction.
  • a rack 115 having the opposite ends thereof fixed to the support members 110 and 111 is arranged between the support members 110 and 111 and it engages with a pinion 116a mounted on a rotary shaft of an encoder 116 mounted on the X drive table 112.
  • a displacement of the X drive table 112 is detected by the encoder 116.
  • a gear 126 is mounted on a base end of the measurement shaft 121 and it engages with a gear 125a mounted on a rotary shaft of a measurement shaft drive motor 125 which is a pulse motor.
  • the measurement shaft 121 is rotated by the rotation of the measurement shaft drive motor 125.
  • a solenoid 124 is secured to the Y drive table 103 to face the base end of the measurement shaft 121. When the solenoid 124 is energized, it engages with the base end of the measurement shaft 121. Namely, when the solenoid 124 is energized, the measurement shaft 121 is secured.
  • FIG. 4 shows a perspective view of an external view of the lens chamfering machine 200
  • Fig. 5 shows a V-V sectional view of Fig. 4.
  • Two guide rails 202a and 202b are parallelly spanned on a base frame 201 and the opposite ends thereof are secured to the base frame.
  • a Y drive table 203 is slidably arranged on the guide rails 202a and 202b.
  • a rack 205 is secured to one end of the Y drive table 203 parallelly to the guide rails 202a and 202b and it engages with a pinion gear 206 secured to a shaft of a chamfering grindstone drive motor 207 secured to the base frame 201.
  • a shaft 204 is embedded near the center of the Y drive table 203 perpendicularly to the guide rails 202a and 202b and a swingable table 210 is pivotably engaged with the shaft 204.
  • Two springs 217a and 217b are mounted at the opposite ends of the swingable table 210 along the X direction, and the other ends of springs 217a and 217b are secured to the drive table 203.
  • a block member 211 is secured to the swingable table 210 and a spindle cylinder 216 is secured to the block member 211 along the Y direction.
  • Bearings 215a and 215b are built in the spindle cylinder 216 and a spindle shaft 214 is rotatably built in inner rings of the bearings 215a and 215b.
  • One end of the spindle shaft 214 is coupled to a shaft 212a of a grindstone drive motor 212 secured to the swingable table 210, through a shaft joint 213.
  • a chamfering grindstone 220 is secured to the other end of the spindle shaft 214.
  • the chamfering grindstone 220 is semi-spherical.
  • a control unit of the lens grinding machine 80 is provided on a front side of the machine as shown in Fig. 1.
  • the control unit 80 comprises a CPU 81 for various arithmetic operations, a program memory 82 which stores a program used for the arithmetic operations by the CPU 81, a data memory 83 which stores various data, input keys 84 for entering various data and commands such as start of operation, an interface circuit 85, a buzzer for informing the end of grinding, and a control circuit 87 for controlling the various motors.
  • the program memory 82 stores a program for operating the lens shape measuring apparatus 100 and a program for driving the various motors in accordance with data from the lens shape measuring apparatus 100.
  • the interface circuit 85 is connected to the lens shape measurement apparatus 100 and an end of grinding sensor 29 provided in the roller 21.
  • the lens frame shape data is two-dimensional coordinate data on the plane normal to the lens optical axis
  • ⁇ n is a distance from the center of the lens LE to a desired peripheral point, that is, a radius of the lens
  • ⁇ n is an angle between a base line passing through the center of the lens LE and the desired peripheral point.
  • the frame shape data is pre-stored in the data memory 83 of the control unit 80.
  • the clutch 106 of the lens shape measuring apparatus 100 is engaged to drive the Y drive table 103 by the Y drive motor 105 such that the measurement device 120b is brought to a position corresponding to a position S10( ⁇ 0-h, ⁇ 0) which is shorter by a bevel height h in a radial direction of the lens LE for first frame shape data ( ⁇ 0, ⁇ 0) of an R1 plane of the lens. Then, as shown in Figs. 11A and 11B, the motors 33, 43 and 55 are driven to drive the lens LE such that the predetermined point S10( ⁇ 0-h, ⁇ 0) of the R1 plane of the lens abuts against the measurement device 120b.
  • the encoder 116 reads the displacement X10 of the X drive table 112 at S10( ⁇ 0-h, ⁇ 0).
  • the lens drive motor is driven by an angle ⁇ 1 to rotate the lens LE, and the Y drive motor 105 is driven to the position corresponding to ( ⁇ 1-h) to drive the measurement device 120b so that the measuring element 120b abuts against S11 ( ⁇ 1-h, ⁇ 1) of the R1 plane of the lens.
  • a displacement X11 of the X drive table 112 at S11( ⁇ 1-h, ⁇ 1) is read by the encoder 116.
  • displacements X'10, X'11, ..., X' 1n of the X drive table 112 are measured for S'10 ( ⁇ 0-h- ⁇ r, ⁇ 0), ..., S' 1n ( ⁇ n -h- ⁇ r, ⁇ n ) which are shorter by a small distance ⁇ r along the radial direction of the lens LE from S10, S11, ..., S 1n .
  • the head frame lateral drive motor 33 and the vertical drive motor 43 are activated to drive the head frame 22 so that the lens LE is moved away from the measurement device 120.
  • the Y drive motor 105 is activated to drive the Y drive table 103 in the direction to retract the measurement device 120.
  • the measurement shaft drive motor 125 is then activated to invert the measurement device 120 by 180 degrees.
  • the head frame lateral drive motor 33 is activated to drive the head frame 22 so that the lens LE approaches the measurement unit 120b and thereafter the motor 105 is activated so that the drive table 103 is driven to bring the measurement unit 102b to the position corresponding to S20 ( ⁇ 0-h, ⁇ 0) of the lens plane R2, as shown in Fig.
  • the head frame 2 is driven to a predetermined position of the plane R2 as it is done in the measurement of the plane R1.
  • the displacements X20, ..., X 2n and X'20, ..., X' 2n of the X drive table 112 are measured as it is done for the plane R1.
  • the displacements X10, ..., X' 2n of the X drive table 112 are distances from an initial position sensor (not shown) of the X drive table 112.
  • the measured displacements X10, ..., X' 2n are converted to the distances x10, ..., x' 2n from the spindle shaft 214 of the lens chamfering machine 200 by the CPU 81 as shown in Fig. 12.
  • Three dimensional coordinate data of the measured points S10, ..., S 1n ; S'10, ..., S' 1n ; S20, ..., S 2n and S'20, ..., S' 2n are calculated (steps 1 and 2).
  • the three-dimensional coordinate data are expressed by S 1n ( ⁇ n -h ⁇ n , x 1n ), S'10 ( ⁇ n -h- ⁇ r, ⁇ n , x' 1n ), S 2n ( ⁇ n -h, ⁇ n , x 2n ), S' 2n ( ⁇ n -h- ⁇ r, ⁇ ' n , x' 2n ) and they are stored in the data memory 83 of the control unit 80.
  • the motors 33, 43 and 25 are activated by an instruction from the CPU 81 to coarsely grind and bevel the lens periphery.
  • the grindstone 23 comprises a coarse grindstone and a bevel grindstone which are integral so that the coarse grinding and the bevel grinding are effected by the grindstone 23 (step 3).
  • the CPU 81 perfomrs various arithmetic operations based on the three-dimensional coordinate data (step 4).
  • the arithmetic operations are explained with reference to flow charts shown in Figs. 8 to 10. In the following description, only the arithmetic operations for the plane R2 is explained to avoid duplicate.
  • an angle ⁇ 1 between a straight line L2 connecting S 2n ( ⁇ n -h ⁇ n , x 2n ) and S 2n ( ⁇ n -h- ⁇ r, ⁇ ' n , x' 2n ) and a straight line L2 passing through S 2n ( ⁇ n -h, ⁇ n , x 2n ) on the grinding plane of the lens periphery is calculated from a formula (1) (step 42).
  • the direction of the line L1 is parallel to the lens optical axis and known.
  • an angle ⁇ 2 between a straight line L3 bisecting the angle ⁇ 1 and the straight line L1 is calculated from a formula (2) (step 43).
  • the coordinates of the point S 2n when the desired chamfering is effected by driving the lens LE in the X direction are calculated. since the point S 2n disappears by the chamfering, the coordinates of the points S 2n are calculated on the assumption that the point S 2n is present (step 45).
  • the point S 2n is represented by S 2n ( ⁇ n -h, ⁇ n , e 2n -g2) where g2 is a chamber. Since the chamfering grindstone 220 is not driven now, the coordinates of the center point P 2n of the chamfering grindstone 220 do not change.
  • the periphery thickness t S 1n - S 2n is calculated.
  • t and Y are compared step 41 and if t ⁇ Y, a decision is made that only the bevel is present on the periphery ground plane, and the process proceeds to a step 50. If t > Y, the process proceeds to the step 42. An actual bevel height m is then calculated (step 50).
  • a bevel top J is generally at the center of the periphery thickness t when the edge thickness is thin.
  • An angle of the bevel that is, an angle between a line JS'' 1n and a line JS'' 2n is represented by 2 x ⁇
  • S'' 1n and S'' 2n are crosspoints of the planes R1 and R2 and the periphery ground plane and ⁇ is an angle made to the radial direction of the lens LE.
  • the coordinates of the points S'' 1n and S'' 2n are represented by S'' 1n ( ⁇ n -m, ⁇ n , x 1n ) S'' 2n ( ⁇ n -m, ⁇ n , x 2n )
  • the angle ⁇ 1 between the planes R1 and R2 and the optical axis is calculated (step 52).
  • the angle between the line L2 passing through the points S'' 2n and S' 2n on the plane R1 and the line L2 passing through the point S'' 2n and parallel to the optical axis is used.
  • the angle ⁇ 3 between the optical axis and the periphery ground plane is calculated (step 53).
  • the angle ⁇ 2 between the line L3 and the line L2 which is a bisecting line to the angle ⁇ 4 is calculated (step 55)
  • the chamfering calculation is over.
  • the chamfering calculation (step 4) is carried out after the bevel grinding (step 3) although it may be carried out after the steps 1 and 2 or during the grinding of the lens periphery (step 3).
  • the height of the lens center O is matched to the height of the axial center Q of the spindle shaft 214 of the lens chamfering machine 200 as shown in Fig. 16B, and the lens LE is spaced from the chamfering grindstone 220 by x 2n along the optical axis.
  • the lens LE is then rotated so that the point ⁇ 0 of the lens LE is on an extension of the line Q.
  • the desired chamfer g is attained by the movement of the lens LE.
  • the corner of the lens LE is ground, it may be cracked when a strong impact is applied thereto. Accordingly, springs 217a and 217b are provided on the chamfering grindstone 220 as the buffer member to relieve the impact.
  • the lens LE is most preferably driven along the line L3 which bisects the angle between the lens plane and the lens periphery ground plane, but since the chamfering grindstone 220 is semispherical, the chamfering of desired chamfer and angle may be attained even if it is driven along the X direction.
  • the lens is moved in the periphery grinding step and the chamfering step although the grindstone may be moved to change the relative distance between the lens and the grindstone.
  • the relative positional relationship between the grindstone and the lens to be ground which is required to attain the desired chamfer shape is calculated based on the data on the shape of the lens to be ground, and the relative positional relationship is changed in accordance with the calculation result. Accordingly, the chamfering with proper angle and amount can be attained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP19920106267 1991-04-16 1992-04-10 Machine pour biseauter des lentilles Expired - Lifetime EP0510462B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3083931A JP3018548B2 (ja) 1991-04-16 1991-04-16 レンズ面取装置およびレンズの面取方法
JP83931/91 1991-04-16

Publications (2)

Publication Number Publication Date
EP0510462A1 true EP0510462A1 (fr) 1992-10-28
EP0510462B1 EP0510462B1 (fr) 1995-07-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920106267 Expired - Lifetime EP0510462B1 (fr) 1991-04-16 1992-04-10 Machine pour biseauter des lentilles

Country Status (3)

Country Link
EP (1) EP0510462B1 (fr)
JP (1) JP3018548B2 (fr)
DE (1) DE69203641T2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0857539A2 (fr) * 1997-02-10 1998-08-12 Nidek Co., Ltd. Dispositif de meulage de lentilles
EP0857540A2 (fr) * 1997-02-10 1998-08-12 Nidek Co., Ltd. Dispositif de meulage de lentilles
DE19808216A1 (de) * 1998-02-27 1999-09-09 Wernicke & Co Gmbh Brillenglasrandschleifmaschine
US5956791A (en) * 1996-11-30 1999-09-28 International Business Machines Corporation Epicycloidal brushing system
EP0953405A2 (fr) * 1998-04-30 1999-11-03 Nidek Co., Ltd. Meuleuse de lentilles optiques
US6062947A (en) * 1997-07-08 2000-05-16 Nidek Co., Ltd. Lens grinding apparatus
EP1352706A2 (fr) * 2002-04-08 2003-10-15 Hoya Corporation Dispositif de traitement de la circonférence de verres de lunettes avec une unité de finition pour chanfreiner et rainer
US6688944B2 (en) 2000-10-17 2004-02-10 Kabushiki Kaisha Topcon Spectacle lens chamfering data preparing method, spectacle lens chamfering method, spectacle lens chamfering data preparing apparatus, and spectacle lens chamfering apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU776015B2 (en) 1999-08-06 2004-08-26 Hoya Corporation Lens processing device, lens processing method, and lens measuring method
JP4846320B2 (ja) * 2005-09-28 2011-12-28 株式会社トプコン 眼鏡レンズ加工方法及び眼鏡レンズ加工装置
JP4846321B2 (ja) * 2005-09-28 2011-12-28 株式会社トプコン 眼鏡レンズ加工方法及び眼鏡レンズ加工装置
JP6197406B2 (ja) 2013-06-28 2017-09-20 株式会社ニデック 眼鏡レンズ加工装置、眼鏡レンズ加工プログラム

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286415A (en) * 1979-03-12 1981-09-01 Ait Industries, Inc. Method of edging lenses
US4912880A (en) * 1985-12-06 1990-04-03 Cobain Optical Industries, Inc. Computerized tracing/edging system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286415A (en) * 1979-03-12 1981-09-01 Ait Industries, Inc. Method of edging lenses
US4912880A (en) * 1985-12-06 1990-04-03 Cobain Optical Industries, Inc. Computerized tracing/edging system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5956791A (en) * 1996-11-30 1999-09-28 International Business Machines Corporation Epicycloidal brushing system
EP0857540A2 (fr) * 1997-02-10 1998-08-12 Nidek Co., Ltd. Dispositif de meulage de lentilles
EP0857539A3 (fr) * 1997-02-10 1999-03-03 Nidek Co., Ltd. Dispositif de meulage de lentilles
EP0857540A3 (fr) * 1997-02-10 1999-03-03 Nidek Co., Ltd. Dispositif de meulage de lentilles
EP0857539A2 (fr) * 1997-02-10 1998-08-12 Nidek Co., Ltd. Dispositif de meulage de lentilles
EP0890414A3 (fr) * 1997-07-08 2002-02-13 Nidek Co., Ltd. Dispositif de meulage de lentilles
US6062947A (en) * 1997-07-08 2000-05-16 Nidek Co., Ltd. Lens grinding apparatus
DE19808216C2 (de) * 1998-02-27 2000-01-27 Wernicke & Co Gmbh Brillenglasrandschleifmaschine
DE19808216A1 (de) * 1998-02-27 1999-09-09 Wernicke & Co Gmbh Brillenglasrandschleifmaschine
EP0953405A2 (fr) * 1998-04-30 1999-11-03 Nidek Co., Ltd. Meuleuse de lentilles optiques
EP0953405A3 (fr) * 1998-04-30 2003-03-26 Nidek Co., Ltd. Meuleuse de lentilles optiques
US6688944B2 (en) 2000-10-17 2004-02-10 Kabushiki Kaisha Topcon Spectacle lens chamfering data preparing method, spectacle lens chamfering method, spectacle lens chamfering data preparing apparatus, and spectacle lens chamfering apparatus
EP1352706A2 (fr) * 2002-04-08 2003-10-15 Hoya Corporation Dispositif de traitement de la circonférence de verres de lunettes avec une unité de finition pour chanfreiner et rainer
EP1352706A3 (fr) * 2002-04-08 2004-12-08 Hoya Corporation Dispositif de traitement de la circonférence de verres de lunettes avec une unité de finition pour chanfreiner et rainer

Also Published As

Publication number Publication date
DE69203641D1 (de) 1995-08-31
JPH05131350A (ja) 1993-05-28
DE69203641T2 (de) 1995-12-21
EP0510462B1 (fr) 1995-07-26
JP3018548B2 (ja) 2000-03-13

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