EP1445065A1 - Brillenglas-Bearbeitungsvorrichtung - Google Patents

Brillenglas-Bearbeitungsvorrichtung Download PDF

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Publication number
EP1445065A1
EP1445065A1 EP04002470A EP04002470A EP1445065A1 EP 1445065 A1 EP1445065 A1 EP 1445065A1 EP 04002470 A EP04002470 A EP 04002470A EP 04002470 A EP04002470 A EP 04002470A EP 1445065 A1 EP1445065 A1 EP 1445065A1
Authority
EP
European Patent Office
Prior art keywords
lens
motor
torque
rotating shafts
processing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04002470A
Other languages
English (en)
French (fr)
Inventor
Toshiaki Mizuno
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.)
Nidek Co Ltd
Original Assignee
Nidek Co Ltd
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 Nidek Co Ltd filed Critical Nidek Co Ltd
Publication of EP1445065A1 publication Critical patent/EP1445065A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B24B9/148—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms electrically, e.g. numerically, controlled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load

Definitions

  • the present invention relates to an eyeglass lens processing apparatus for processing the periphery of eyeglass lenses.
  • a known eyeglass lens processing apparatus is configured such that a lens to be processed is chucked (held) between two lens rotating shafts; the chucked lens is rotated by rotating the lens rotating shafts through use of a motor; and the lens is pressed against an abrasive wheel while the lens is being rotated, to thus process the periphery of the lens.
  • a cup which is a jig for retaining the lens is fixedly attached to the optical center or the frame center of the lens, and then the cups is attached to one of the lens rotating shafts, whereby the lens is chucked and is processed.
  • the cup is fixedly attached to the lens through use of an adhesive tape or by suction.
  • the present invention has been conceived in view of the problems in the related art, and a technical challenge to be met by the invention is to provide an eyeglass lens processing apparatus which enables highly-precise processing of a lens while suppressing occurrence of axial displacement, which would otherwise arise during processing operation.
  • the prevent invention is characterized by comprising the following configuration.
  • FIG. 1 is a schematic outside view of an eyeglass lens processing apparatus according to the present invention.
  • An eyeglass frame shape measurement device 2 is disposed in an upper right of a system main unit 1.
  • An apparatus described in, e.g., US 5333412 (JP-A-4-93164) and US Re. 35898 (JP-A-5-212661) can be used as the measurement device 2.
  • a switch panel section 410 having switches to be used for controlling the measurement device 2; a display 415 for displaying processing information and the like; and a switch panel section 420 having switches to be used for entering processing requirements, issuing a processing instruction and the like are arranged front of the measurement device 2.
  • Reference numeral 402 designates a reclosable window for use with a processing chamber.
  • Fig. 2 is a schematic structural diagram of a lens processing section to be disposed inside a housing of the main unit 1.
  • a carriage section 700 is mounted on a base 10.
  • a lens to be processed (hereinafter simply called a "lens") LE chucked (held) between two lens rotating shafts 702L, 702R of a carriage 701 is processed by a group of abrasive wheels 602 attached to an abrasive wheel rotating shaft 601.
  • the group of abrasive wheels 602 includes a rough abrasive wheel 602a for a plastic lens; a rough abrasive wheel 602b for a glass lens; and a finishing abrasive wheel 602c for beveling processing and flat processing.
  • the shaft 601 is rotatably attached to the base 10 by a spindle 603.
  • a pulley 604 is attached to the right end of the shaft 601, and is coupled through a belt 605 to a pulley 607 attached to a rotating shaft of an abrasive wheel rotating motor 606.
  • a lens shape measurement section 500 is disposed rearward of a carriage 701.
  • Figs. 3A and 3B are schematic structural diagrams of the carriage section 700.
  • Fig. 4 is a view of the carriage section 700 shown in Fig. 2 when viewed in direction E.
  • the carriage 701 can cause the shafts 702L, 702R to chuck and rotate the lens LE. Further, the carriage 701 is rotatable and slidable with respect to a carriage shaft 703 fixed to the base 10 and extending parallel to the shaft 601.
  • a lens chuck mechanism, a lens rotation mechanism, a X-axial direction movement mechanism for moving the carriage 701, and a Y-axial direction movement mechanism for moving the carriage 701 will be described hereinafter under the definition that a direction in which the carriage 701 is moved parallel to the shaft 601 is taken as the X-axial direction, and a direction in which a distance between the rotational center axis of the shafts 702L, 702R and the rotational center axis of the shaft 601 is changed by rotation of the carriage 701 is taken as the Y-axial direction.
  • the shaft 702L and the shaft 702R are rotatably held coaxially by a left arm 701L and a right arm 701R of the carriage 701,respectively.
  • a cup receiver 303 is attached to the right end of the shaft 702L.
  • a lens presser (retainer) 304 is attached to the left end of the shaft 702R.
  • a chucking motor 710 is fixed to an upper center surface of the right arm 701R, and a pulley 711 attached to a rotating shaft of the motor 710 is coupled through a belt 712 to a feed screw 713 rotatably held inside the right arm 701R.
  • the rotation of the feed screw 713 by the motor 710 causes a feed nut 714 to move in the axial direction of the shaft 702R so that the shaft 702R coupled to the feed nut 714 is moved in the axial direction.
  • the lens LE is chucked between the shafts 702L, 702R.
  • a cup 50 serving as a fixing jib has previously been fixedly attached to a front refractive surface of the lens LE, and a base section of the cup 50 is fixedly attached to the cup receiver 303 provided on the shaft 702L.
  • the cup 50 encompasses a cup of suction type and a cup to be attached by way of an adhesive tape.
  • a motor mount block 720 is attached to the left end portion of the left arm 701L.
  • a gear 721 is attached to the left end of the shaft 702L passing through the block 720.
  • a lens rotating motor 722 is fixed to the block 720. Rotation of the motor 722 is transmitted to the shaft 702L by way of the gear 721 and a gear 724.
  • a servo motor is used for the motor 722, and an encoder 722a is provided for detecting a rotational angle of a rotating shaft of the motor 722.
  • a pulley 726 is mounted on the shaft 702L inside the left arm 701L.
  • the pulley 726 is coupled through a timing belt 731a, to a pulley 703a attached to the left end of a rotating shaft 728 rotatably held rearward of the carriage 701.
  • a pulley 703b attached to the right end of the shaft 728 is coupled through a timing belt 731b, to a pulley 733 mounted on the shaft 702R inside the carriage right arm 701R.
  • the pulley 733 is slidable in the axial direction of the shaft 702R. By this configuration, the shaft 702L and the shaft 702R rotate synchronously.
  • a moving arm 740 is attached to the shaft 703 so as to be slidably movable along with the carriage 701 in the X-axial direction.
  • a front portion of the arm 740 is made slidable over a guide shaft 741 fixed to the base 10 in parallel with the shaft 703.
  • a rack 743 extending in parallel with the shaft 703 is attached rearward of the arm 740.
  • a pinion 746 attached to a rotating shaft of an X-axial direction movement motor 745 meshes with the rack 743.
  • the motor 745 is fixed to the base 10 , and the carriage 701 is moved in the X-axial direction along with the arm 740 by rotational drive of the motor 745.
  • a swingable block 750 is attached to the arm 740 so as to be pivotable around an axis La coinciding with the rotational center axis of the shaft 601.
  • a distance from the center axis of the shaft 703 to the axis La is set so as to be equal to a distance from the center axis of the shaft 703 to the rotational center axis of the shafts 702L, 702R.
  • a Y-axial direction movement motor 751 is fixed to the swingable block 750.
  • a servo motor is used for the motor 751, and an encoder 751a is provided for detecting a rotational angle of a the rotating shaft of the motor 751.
  • Rotation of the motor 751 is transmitted, through a pulley 752 and a belt 753, to a female thread 755 held in a rotatable manner by the block 750.
  • a feed screw 756 is inserted into and meshed with a screw section provided in the female thread 755. The feed screw 756 is vertically moved by the rotation of the female thread 755.
  • the upper end of the feed screw 756 is fixed to the block 720.
  • the block 720 is vertically moved along guides 758a, 758b, whereby the vertical position of the carriage 701 attached to the block 720 can also be changed. That, the carriage 701 is pivoted around the shaft 703 as the center of rotation, thereby changing a distance L between the rotational center axis of the shafts 702L, 702R and the rotational center axis of the shaft 601.
  • a processing pressure to be exerted on the lens LE (the pressure for pressing the lens LE against the abrasive wheel 602) is adjusted by controlling the torque of the motor 751.
  • the torque of the motor 751 is controlled by a voltage imparted to the motor 751.
  • a compression spring or the like, is preferably interposed between, for example, the left arm 701L and the arm 740 in order to lessen the downward load imposed on the carriage 701.
  • the mechanism for adjusting the processing pressure can also be constituted by a spring for pulling the carriage 701 toward the abrasive wheel 601 and a mechanism for changing the force of the spring.
  • R denotes the radius of the abrasive wheel 602
  • the radius vector information (r ⁇ n, r ⁇ n) is rotated around the processing center by each arbitrary minute unit angle, thereby determining a maximum L obtained at that time in the same manner as mentioned previously.
  • the foregoing calculation is performed over the entire circumference of the lens LE, where the maximum L achieved at each ⁇ i is taken as Li , and r ⁇ n achieved at that time is taken as ⁇ i.
  • the control section 100 activates the measurement section 500 on the basis of the processing correction data to measure the shapes of a front surface and a rear surface of the lens LE. Subsequently, the control section 100 obtains rough processing data and finishing data on the basis of the processing correction data in accordance with a predetermined program.
  • bevel locus data are determined on the basis of the shape of the lens LE determined by the measurement section 500.
  • the bevel locus is determined by, e.g., a method for dividing an outer peripheral edge thickness of a lens with a certain ratio; a method for determining curve values from front and rear curves of a lens; a combination of these methods; or the like.
  • the control section 100 sequentially performs rough processing and finishing operations by rotating the abrasive wheel 602 at high speed by controlling the drive of the motor 606.
  • the control section 100 controls the drive of the motor 745 to move the carriage 701 in the X-axial direction such that the carriage 701 comes to a position above the rough abrasive wheel 602a.
  • the lens LE is rotated by controlling the drive of the motor 722, and the carriage 701 is moved in the Y-axial direction by controlling the drive of the motor 751, whereby the lens LE is pressed against the rotating rough abrasive wheel 602a and thus rough-processed.
  • the control section 100 controls the drive of the motors 722 and 751 through drivers 115 and 117 in accordance with ( ⁇ i, Li) of the processing correction data ( ⁇ i, Li, ⁇ i).
  • the rotational angle of the lens LE (shafts 702L, 702R) is detected by the encoder 722a.
  • the inter-axis distance Li which acts as the position to which the carriage 701 is moved in the Y-axial direction, is detected by the encoder 751a.
  • the processing correction data for rough processing data are determined while factoring in a region which is to be used for finishing.
  • the driver 115 sends, to the servo motor 722 that rotates the shafts 702L, 702R, an instruction pulse signal for rotating the lens LE for each rotational angle ⁇ i. Concurrently, the rotational angle of the rotating shaft of the motor 722 is detected by the pulse signal output from the encoder 722a. The driver 115 compares the instruction pulse signal output to the motor 722 with the pulse signal output (issued) from the encoder 722a.
  • a voltage to be supplied to the motor 722 i.e., an electric current flowing into the motor 722 is changed so as to eliminate the difference.
  • the motor 722 increases torque T, thereby attempting to adjust the rotational angle of the rotating shaft of the motor 722 to the instructed position.
  • the torque T achieved at this time is substantially proportional to a rotational angle error ⁇ (a rotational angle error between the rotation instruction pulse signal output to the motor 722 and the pulse signal output from the encoder 722a) . Therefore, the torque T of the motor 722 can be obtained from the rotational angle error ⁇ .
  • the control section 100 controls the drive of the motor 722, specifically lowers the torque of the motor 722 or stop rotational drive, thereby the rotational speed of the lens LE (the shafts 702L, 702R) is decreased.
  • the control section 100 controls the drive of the motor 751, specifically lower the torque of the motor 751 or stop rotational drive, thereby decreasing the pressing pressure to be exerted on the lens LE.
  • the torque of the motor 751 can be detected from an electric current flowing into the motor 751 detected by an electric current detection circuit of the driver 117.
  • the torque of the motor 751 can also be detected by detecting the rotation instruction pulse signal output to the motor 751 and the pulse signal output from the encoder 751a.
  • the allowable torque level T0 is a value at which no rotational displacement arises between the cup 50 (i.e., the shafts 702L, 702R) and the lens LE. This level is previously determined by a test or the like, and the determined value is stored in the memory 120.
  • the control section 100 again controls the drive of the motors 722, 751 for performing normal processing operation.
  • the torque T of the motor 72 2 exceeds the allowable torque level T0, the rotational speed of the lens LE, the processing pressure to be exerted on the lens LE, or the like is controlled such that the torque T falls lower than the allowable torque level T0, thereby decreasing the load exerted on the lens LE and preventing occurrence of axial displacement in the lens LE.
  • the control section 100 moves the carriage 701 in the X-axial direction of the X axis, to thereby move the lens LE to a position above the finishing abrasive wheel 602c. Subsequently, in accordance with the finishing data, rotation of the lens LE and movement of the carriage 701 in the X-and Y-axial directions are controlled, thereby performing finishing of the lens LE. If the torque T of the motor 722 exceeds the allowable torque level T0 during the course of finishing of the lens LE as well, the control section 100 controls the drive of the motors 722, 751 such that the torque T falls lower than the allowable torque level T0.
  • information on the rotational angle difference ⁇ between the rotation instruction pulse signal output to the motor 722 and the pulse signal output from the encoder 722a is used as a method for detecting (monitoring) the torque transmitted to the shafts 702L, 702R.
  • a method for providing torque sensors directly on the shafts 702L, 702R there may also be employed a method for providing torque sensors directly on the shafts 702L, 702R.
  • the method for decreasing the processing pressure to be exerted on the lens LE such that the detected torque T falls lower than the allowable torque level T0 also encompasses a case where the lens LE is detached from the abrasive wheel 602.
  • a configuration for setting a limit on an electric current flowing into the motor 722 for rotating the shafts 702L, 702R and controlling the drive of the motor 722 within the range of the limit value may also be employed as the method for preventing the torque T transmitted to the shafts 702L, 702R from exceeding the allowable torque level T0.
  • the electric current flowing into the motor 722 is detected by the electric current detection circuit of the driver 115.
  • the torque T of the motor 722; that is, the torque T transmitted to the shafts 702L, 702R is substantially proportional to the electric current flowing into the motor 722.
  • the torque T of the motor 722 (i.e., the torque T transmitted to the shafts 702L, 702R) can also be detected (monitored) by means of detecting the electric current flowing into the motor 722.
  • the limit imposed on the electric current flowing into the motor 722 is determined on the basis of the allowable torque level T0 at which no rotational displacement developbetween the shafts 7O2L, 702R and the lens LE, and the limit value is to be stored in the memory 120.
  • the rotational angle of the lens LE is detected on the basis of the output from the encoder 722a, and the drive of the motor 751 is controlled on the basis of processing data ( ⁇ i, Li) corresponding to the detected rotational angle, thereby controlling the inter-axis distance L.
  • the lens (lens rotating shaft) is moved toward the abrasive wheel (abrasive wheel rotating shaft) for processing
  • the abrasive wheel (abrasive wheel rotating shaft) can be moved toward the lens (lens rotating shaft) for processing.
  • a drive of a motor for moving the abrasive wheel (abrasive wheel rotating shaft) is controlled to adjust a pressing pressure.
  • the abrasive wheel is used as a processing tool for the lens, known processing tools which can rotate to grind or saw (cut) the lens can be used instead of the abrasive wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP04002470A 2003-02-05 2004-02-04 Brillenglas-Bearbeitungsvorrichtung Withdrawn EP1445065A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003028588 2003-02-05
JP2003028588 2003-02-05

Publications (1)

Publication Number Publication Date
EP1445065A1 true EP1445065A1 (de) 2004-08-11

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ID=32652984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04002470A Withdrawn EP1445065A1 (de) 2003-02-05 2004-02-04 Brillenglas-Bearbeitungsvorrichtung

Country Status (2)

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US (1) US20040192170A1 (de)
EP (1) EP1445065A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102441829A (zh) * 2010-09-30 2012-05-09 尼德克株式会社 眼镜镜片加工设备
EP2623261A2 (de) * 2012-02-03 2013-08-07 Nidek Co., Ltd Vorrichtung zum Bearbeiten von Brillengläsern

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4551162B2 (ja) * 2004-08-31 2010-09-22 株式会社ニデック 眼鏡レンズ加工装置
JP2006189472A (ja) * 2004-12-28 2006-07-20 Nidek Co Ltd 眼鏡レンズ加工装置
JP4873878B2 (ja) * 2005-03-31 2012-02-08 株式会社ニデック 眼鏡レンズ周縁加工装置
JP4290673B2 (ja) * 2005-04-28 2009-07-08 株式会社ニデック 眼鏡レンズ周縁加工方法
JP2007152439A (ja) * 2005-11-30 2007-06-21 Nidek Co Ltd 眼鏡レンズ加工装置
JP2007181889A (ja) * 2006-01-05 2007-07-19 Nidek Co Ltd 眼鏡レンズ加工システム
JP4975469B2 (ja) * 2007-02-02 2012-07-11 株式会社ニデック 眼鏡レンズ加工装置
JP5301823B2 (ja) 2007-12-06 2013-09-25 株式会社ニデック 眼鏡レンズ周縁加工装置
JP5302029B2 (ja) 2009-02-04 2013-10-02 株式会社ニデック 眼鏡レンズ加工装置
US9033762B2 (en) * 2009-07-22 2015-05-19 Jtekt Corporation Method and device for preventing slip of work piece
JP5469476B2 (ja) * 2010-02-15 2014-04-16 株式会社ニデック 眼鏡レンズ加工装置
CN103237627B (zh) * 2010-10-04 2016-11-09 施耐德两合公司 用于加工光学透镜的设备和方法以及光学透镜和用于光学透镜的输送容器
FR2980387B1 (fr) * 2011-09-26 2013-09-27 Essilor Int Procede de detourage d'une lentille ophtalmique
JP6236787B2 (ja) 2013-01-17 2017-11-29 株式会社ニデック 眼鏡レンズ加工装置

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EP0968790A2 (de) * 1998-06-30 2000-01-05 Nidek Co., Ltd. Schleifgerät zum Schleifen von Brillengläsern
DE19914174A1 (de) * 1999-03-29 2000-10-12 Wernicke & Co Gmbh Verfahren und Vorrichtung zum Formbearbeiten des Umfangsrandes von Brillengläsern

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US5333412A (en) * 1990-08-09 1994-08-02 Nidek Co., Ltd. Apparatus for and method of obtaining processing information for fitting lenses in eyeglasses frame and eyeglasses grinding machine
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DE19616536A1 (de) * 1996-04-25 1997-11-06 Wernicke & Co Gmbh Verfahren und Brillenglasrandschleifmaschine zum Formschleifen des Umfangsrandes von Brillengläsern und zum ggf. anschließenden Facettenschleifen
DE19632340A1 (de) * 1996-08-10 1998-02-12 Wernicke & Co Gmbh Verfahren zum Formschleifen des Umfangsrandes von Brillengläsern und zum ggf. anschließenden Facettenschleifen
EP0968790A2 (de) * 1998-06-30 2000-01-05 Nidek Co., Ltd. Schleifgerät zum Schleifen von Brillengläsern
DE19914174A1 (de) * 1999-03-29 2000-10-12 Wernicke & Co Gmbh Verfahren und Vorrichtung zum Formbearbeiten des Umfangsrandes von Brillengläsern

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102441829A (zh) * 2010-09-30 2012-05-09 尼德克株式会社 眼镜镜片加工设备
EP2436481A3 (de) * 2010-09-30 2014-11-05 Nidek Co., Ltd. Vorrichtung zum Bearbeiten von Brillengläsern
CN102441829B (zh) * 2010-09-30 2017-05-10 尼德克株式会社 眼镜镜片加工设备
CN107350923A (zh) * 2010-09-30 2017-11-17 尼德克株式会社 眼镜镜片加工设备
US9925635B2 (en) 2010-09-30 2018-03-27 Nidek Co., Ltd. Eyeglass lens processing apparatus
EP2623261A2 (de) * 2012-02-03 2013-08-07 Nidek Co., Ltd Vorrichtung zum Bearbeiten von Brillengläsern
EP2623261A3 (de) * 2012-02-03 2014-10-29 Nidek Co., Ltd Vorrichtung zum Bearbeiten von Brillengläsern
US9604342B2 (en) 2012-02-03 2017-03-28 Nidek Co., Ltd. Eyeglass lens processing apparatus

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