US3079737A - Toric lens tool - Google Patents
Toric lens tool Download PDFInfo
- Publication number
- US3079737A US3079737A US103636A US10363661A US3079737A US 3079737 A US3079737 A US 3079737A US 103636 A US103636 A US 103636A US 10363661 A US10363661 A US 10363661A US 3079737 A US3079737 A US 3079737A
- Authority
- US
- United States
- Prior art keywords
- lens
- warping
- tool
- blank
- bar
- 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.)
- Expired - Lifetime
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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
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/005—Blocking means, chucks or the like; Alignment devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T82/00—Turning
- Y10T82/14—Axial pattern
- Y10T82/148—Pivoted tool rest
Definitions
- One object of the invention is to provide a toric lens tool having means to hold a lens blank in such manner that two opposite peripheral portions thereof are held in a d ferent plane than two other opposite peripheral portions thereoi at right angles to the two first portions, whereby the lens blank is warped; and thereupon by cutting, grinding and/ or polishing a surface of the lens blank to spherical shape, that surface will be toric in shape when the lens blank is released from the tool.
- Another object is to provide a lens blank holding tool having means to accurately align a lens blank so that the blank is concentric relative to the tool and a base curve for the lens can be cut or ground in the blank and will be concentric to the blank itself so that subsequent cutting or grinding of a spherical power curve opposite the base curve may be accomplished with assurance that there will be accurate optical alignment of the two curves and at the same time minimizing the time equired for completely cutting or grinding the lens.
- Still another object is to provide separate means for holding the edge of the lens blank at two pairs of diametrically opposite points, one pair of points being crosswise of the other and the pairs of points being in dififerent planes so as to warp the lens blank before a cutting, grinding and/or finishing operation on one surface thereof whereby when that surface is finished to a spheri al shape, it wil return to a toric shape when released from our lens holding means.
- a in r object is to provide means of calibration to indicate the adjustm nt of the tool for toric surfaces of different dioptric rabetween the major and minor curvatures of the toric lens surface.
- Still a further object is to provide a supporting and centering ring for the lens which is acted upon by the tool, being warped t and in turn warping the lens blank as the tool is adjusted for the desired degree of such dioptric ratio.
- our invention ls sts in the construction, arrangement and combination of he various parts of our toric lens tool, whereby i above contemplated are 'ned, as hereinafter -v set forth, pointed out ace is an enlarged and ex our toric l 7. a front elevation o r tori k held hereby in a COllclI a -e, the parts Jed from the F1 tow l the viewer.
- FIG. 4 a side elevation, partly in section, of our tool adiusted to receive a lens blank and illustrating the insertion of such blank in the tool.
- FIG. 5 is a sectional view similar to FIG. 3 but rotated 90 and shows the cooperation of the lathe spindle and collet with certain portions of the lens holder to axially align them relative to each other and thereby accurately center the lens blank with respect to the axis of rotation of the tool.
- Pi-GS. 6 and 7 are enlarged sectional views similar to FIGS. 3 and 5 respectively showing the tool adjusted for Warping the lens blank;
- FIG. 8 is a sectional view similar to FIG. 7 showing the tool and lens blank associated with a polishing tool and pin for polishing the base curve of the lens after it has been cut or ground.
- the present invention has to do with a lens holding tool so designed that the base (or posterior) curve for the lens can be cut, ground and/ or polished with cylinder and therefore has a toric shape.
- the copcnding application of Kratt, Serial No. 51,167, filed August 22, 1960 shows and claims a somewhat similar tool for forming a toric power (or anterior) curve on a lens.
- a toric base curve as herein disclosed is accomplished by warping the lens blank.
- a tool body T is provided with a pair of diametrically opposite jaws to and a bore 12 having a threaded portion
- the adjusting screw S has a screw portion 16 entering the threads 1 and a knob 18 provided with graduations 26
- the graduations may bear suitable indicia (not shown) to be read against a hairline 24 of a transparent pointer 2-2 extending from the tool body T.
- a set screw as is provided in the body T to bear against a soft metal slug which in turn bears against the threads of the adjusting screw 16 for retaining the adjustment thereof.
- the body T is further provided with a cross slot 36 adapted to receive the warping bar W.
- the bar in turn has a central clearance notch 32, at the ends of which supporting shoulders are provided that terminate in circumference engaging shoulders 36 for the warping and supporting ring it.
- the ring R preferably has a cone seat 33 to fit a cone surface it; of the lens blank B, which blank also has a. flange 32.
- a lathe spindle 44 is shown having a tapered bore to receive a collet 45 of the usual split type (3 splits being illustrated at 43).
- the collet of course is adapted to be drawn into the spindle to contract around the lens holding tool shown in PEG. 1 when it is assembled with a lens blank therein illustrated in these two figures wherein no attempt how- Referring to HG. 4 the manner of assembly of the tool to hold a blank B is illustrated.
- the adjusting screw S is in such position as to clear the bottom of the oss slot so that the warping bar W can be slid into POSlLlO'l'I as indicated by the arrow 5'3.
- the blank B has been seated in the ring R and the ring in turn positioned for confinement between the shoulders 36 ac-varev and supported on the shoulders 3 3.
- top of blank B isle: of the ws is? accordn "ly the bar W can be slid all be way as to the po .r shown in with th ends of the bar substantially coincident h the circurnference of the tool body '1.
- the screw S may be tightened a5, ist the bar W.
- FIG. 3 shows the manner of cutting, a lathe bit 52 being shown in a lathe bit holder 54-.
- the lathe bit is adapted to cut a base curve 55 in the lens blank B on a suitable radius indicated r.
- the lathe bit is so mounted as to swing about a vertical axis indicated by a dot 53 and of course may be adjusted for any reqrired length of radius as r.
- the lathe bit 52 swinging about the center 5'55 and through an arc of cut indicated at 5%, will cut the surface of the warped lens spherical as it is held by our toric lens tool, and such spherical surfaces are also idicate at 5% in FIGS. 6 and '7.
- ii the lens blank is released from the position it assumes in PEG. 6 by loosening the adjusting screw S the blank will return to its original sh pc and the base curve 5r; will assume a sharper curvature as indicated by the dot-anddash line and will constitute the minor curvature of toric surface whereas release from the p iiicn in FIG.
- the base curve 5% (o 3 remains warped) is toric lens tool with the collet and associated was a po shing tool d2 having a herrnispherica head provided with padding of rnoleskin, felt, velve or the like charged with a Preble polishing agent such as sta-nnic oxide and water, and with a polishing pin 5'5 of a pol shing machine, the point of which oscillates on an are do while the tool 62 rotates as indicated by the arrow 79.
- the sur ace 55 is polished spherical so that when the lens blank s re eased from the tool it has a pol: ned toric surface 5- 56 the minor and major curvatures of which are according to th indicated arcs se and dd in FZJS. 6 and 7.
- the screw the (not shown) at a suitable speed for polishing.
- Acco dingly one curvature will be sharper than the other en the bi is released from the tool and thereupon u ns to its original shape.
- a certain dioptric difference to produce a toric base curvature (or cylinder) in the lens has been formed into the posterior surface oi the lens.
- a ally H63. 6 and 7 the degree of warping is so ewhat exaggerated, as but a few thousandths of an 'inch movement is all that is required.
- the graduations 2% serve as a micrometer scale which may be calibrated as desired in either thousandths of an inch difr'erence or diopters or dillereuce.
- a body having a pair of opposite lens blank edge engaging jaws, said body having crosswise of said jaws a slot, a warping bar slidably received in said slot and having a pair of lens blank edge engaging shoulders, a supporting and warping ring interposed between said shoulders and the blank, and an adjusting screw carried by said body and engageable with said warping bar to move said bar axially of said body and in a direction for warping the lens blank between said jaws and said shoulders.
- a body having a pair of opposite lens blank edge engaging jaws, said body having crosswise of said jaws a slot, at warping bar slidably received in said slot and having a pair of lens edge engaging shoulders, a supporting and Warping ring interposed between said shoulders and the blank, an adjusting screw carried by said body and engageable with said warping bar to move said bar axially of said body and in a direction for warping the lens blank between said jaws and said shoulders, and calibration means for said adjusting screw.
- a toric lens tool comprising a body having a pair of opposite lens blank edge engaging jaws, said body having crosswise thereof a slot, at warping bar slidably received in said slot and having a pair of lens blank edge engaging shoulders intermediate said jaws, and an adjusting screw carried by said body and engageable with said warping bar to move the bar axially of the body an in a direction for warping the lens blank between said jaws and said shoulders.
- a toric lens tool comprising a body having a pair of opp-o ite lens blank edge engaging jaws, said body having crosswise thereof a slot, a warping bar slidably received 'n sale slot and having a pair of lens blank edge engaging s oulders intermediate said jaws, an adjusting screw carby said body and engageable with said warping bar to move th bar axially of the body and in a direction warping the lens blank between said jaws and said ulders, and calibration means for said adjusting screw.
- a cylindrical body having a pair of opposite lens blank edge engaging jaws for one surface of a lens blank, a warping bar having a pair of lens blank edge engaging shoulders for the opposite surface of the lens blank, said shoulder being circumferentially intermediate said jaws, and an adjusting screw carried by said body and engageable with said warping bar to move said bar axially of said body for warping the lens blank between said jaws and said shoulders.
- a cylindrical body having a pair of opposite lens blank edge engaging jaws for one surface of a lens blank, a warping bar having a pair of lens blank edge engaging shoulders for the opposite surface of the lens blank, said shoulders being circumferentially intermediate said jaws and the length of said bar being coincident with the diameter of said body, a supporting and warping ring interposed between said shoulders and the blank and an adjusting screw carried by said body and engageable with said warping bar to move said bar axially of said body for warping the lens blank between said jaws and said shoulders.
- a cylindrical body having a pair of opposite lens blank edge engaging jaws for one surface of a lens blank, a warping bar having a pair of lens blank edge engaging shoulders for the opposite surface of the lens blank, said shoulders being circumferentially intermediate said jaws and the length of said bar being coincident with the diameter of said body, and an adjusting screw carried by said body and engageable with said warping bar to move said bar axially of said body for warping the lens blank between said jaws and said shoulders.
- a toric lens tool comprising a cylindrical body having a pair of opposite lens blank edge engaging jaws, said body having crosswise thereof a slot, a warping bar of substantially the same length as the diameter of said body, slidably received in said slot and having a pair of lens blank edge engaging shoulders intermediate said jaws, and an adjusting screw carried by said body and engageable with said warping bar to move the bar axially of the body and in a direction for warping the lens blank between said jaws and said shoulders.
- a cylindrical body for reception in a lathe collet said body having a pair of opposite lens blank edge engaging jaws, said body having crosswise of said jaws a slot, a warping bar slidably received in said slot and having a pair of lens blank edge engaging shoulders, a supporting and warping ring interposed between said shoulders and the blank, means to center said bar and said ring relative to said body, and an adjusting screw carried by said body and engageable with said warping bar to move said bar axially of said body in a direction for warping the lens blank between said jaws and said shoulders.
- a cylindrical body having a pair of opposite lens blank edge engaging jaws for one surface of a lens blank, a warping bar having a pair of lens blank edge engaging shoulders for the opposite surface of the lens blank, said shoulder being circumferentially intermediate said jaws, and an adjusting screw carried by said body and engageable with said warping bar to move said bar axially of said body for warping the lens blank between said jaws and said shoulders, said adjusting screw having a polishing pin seat located on the axis of said body and at the end of said tool opposite said jaws and warping bar.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US103636A US3079737A (en) | 1961-04-17 | 1961-04-17 | Toric lens tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US103636A US3079737A (en) | 1961-04-17 | 1961-04-17 | Toric lens tool |
Publications (1)
Publication Number | Publication Date |
---|---|
US3079737A true US3079737A (en) | 1963-03-05 |
Family
ID=22296218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US103636A Expired - Lifetime US3079737A (en) | 1961-04-17 | 1961-04-17 | Toric lens tool |
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US (1) | US3079737A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3210894A (en) * | 1962-08-13 | 1965-10-12 | Kollmorgen Corp | Method of producing aspheric surfaces on mirrors or lenses |
US3227507A (en) * | 1961-08-16 | 1966-01-04 | Feinbloom William | Corneal contact lens having inner ellipsoidal surface |
US3497577A (en) * | 1966-02-15 | 1970-02-24 | Ceskoslovenska Akademie Ved | Method of production of plastic lenses with aspherical surfaces |
US4074469A (en) * | 1974-02-08 | 1978-02-21 | Benjamin Nuchman | Apparatus for manufacturing lenses |
US4208365A (en) * | 1978-12-20 | 1980-06-17 | National Patent Development Corporation | Method and apparatus for molding toric contact lenses |
US4240311A (en) * | 1978-12-18 | 1980-12-23 | Motorola, Inc. | Quartz crystal resonator |
US4686798A (en) * | 1985-06-21 | 1987-08-18 | Sola U.S.A. Inc. | Optical blank carrier for lathing lenses and process therefor |
US5025595A (en) * | 1988-11-11 | 1991-06-25 | Glaenzer Spicer | Method and device for finishing a concave spherical bearing surface on a roller segment, particularly for a homokinetic joint |
US5031303A (en) * | 1988-11-18 | 1991-07-16 | Glaenzer Spicer | Methods and device for accurately positioning a roller segment for the purpose of finishing its pivoting bearing surface, and a method for machining the seats of device of this kind |
US5269105A (en) * | 1992-09-29 | 1993-12-14 | Bausch & Lomb Incorporated | Method of generating a toric surface on a molding tool |
US5347896A (en) * | 1992-12-21 | 1994-09-20 | Bausch & Lomb Incorporated | Automated collet loading for the manufacture of contact lenses |
US5502518A (en) * | 1993-09-09 | 1996-03-26 | Scient Optics Inc | Asymmetric aspheric contact lens |
US20070243277A1 (en) * | 2006-04-14 | 2007-10-18 | Hon Hai Precision Industry Co., Ltd. | Molding assembly |
US20090169666A1 (en) * | 2007-12-27 | 2009-07-02 | Hon Hai Precision Industry Co., Ltd. | Mold for forming optical lens |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1022761A (en) * | 1910-12-20 | 1912-04-09 | Carl Stvanek | Bevel-gear chuck. |
US1412170A (en) * | 1922-04-11 | Walteb l | ||
US1455438A (en) * | 1920-11-23 | 1923-05-15 | American Optical Corp | Lens block |
US2301035A (en) * | 1942-07-27 | 1942-11-03 | Golderer Adolf | Lens blocking device |
GB601326A (en) * | 1945-10-01 | 1948-05-04 | Claude Spencer Harris | Improvements in and relating to vacuum chucks or work holders |
US2443895A (en) * | 1943-12-20 | 1948-06-22 | Bryant Grinder Corp | Bevel gear holding fixture |
US2872198A (en) * | 1957-05-20 | 1959-02-03 | Nat Broach & Mach | Work holder |
US2918291A (en) * | 1958-07-23 | 1959-12-22 | Plantas Charles | Toolholder adapter |
-
1961
- 1961-04-17 US US103636A patent/US3079737A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1412170A (en) * | 1922-04-11 | Walteb l | ||
US1022761A (en) * | 1910-12-20 | 1912-04-09 | Carl Stvanek | Bevel-gear chuck. |
US1455438A (en) * | 1920-11-23 | 1923-05-15 | American Optical Corp | Lens block |
US2301035A (en) * | 1942-07-27 | 1942-11-03 | Golderer Adolf | Lens blocking device |
US2443895A (en) * | 1943-12-20 | 1948-06-22 | Bryant Grinder Corp | Bevel gear holding fixture |
GB601326A (en) * | 1945-10-01 | 1948-05-04 | Claude Spencer Harris | Improvements in and relating to vacuum chucks or work holders |
US2872198A (en) * | 1957-05-20 | 1959-02-03 | Nat Broach & Mach | Work holder |
US2918291A (en) * | 1958-07-23 | 1959-12-22 | Plantas Charles | Toolholder adapter |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3227507A (en) * | 1961-08-16 | 1966-01-04 | Feinbloom William | Corneal contact lens having inner ellipsoidal surface |
US3210894A (en) * | 1962-08-13 | 1965-10-12 | Kollmorgen Corp | Method of producing aspheric surfaces on mirrors or lenses |
US3497577A (en) * | 1966-02-15 | 1970-02-24 | Ceskoslovenska Akademie Ved | Method of production of plastic lenses with aspherical surfaces |
US4074469A (en) * | 1974-02-08 | 1978-02-21 | Benjamin Nuchman | Apparatus for manufacturing lenses |
US4240311A (en) * | 1978-12-18 | 1980-12-23 | Motorola, Inc. | Quartz crystal resonator |
US4208365A (en) * | 1978-12-20 | 1980-06-17 | National Patent Development Corporation | Method and apparatus for molding toric contact lenses |
US4686798A (en) * | 1985-06-21 | 1987-08-18 | Sola U.S.A. Inc. | Optical blank carrier for lathing lenses and process therefor |
US5025595A (en) * | 1988-11-11 | 1991-06-25 | Glaenzer Spicer | Method and device for finishing a concave spherical bearing surface on a roller segment, particularly for a homokinetic joint |
US5031303A (en) * | 1988-11-18 | 1991-07-16 | Glaenzer Spicer | Methods and device for accurately positioning a roller segment for the purpose of finishing its pivoting bearing surface, and a method for machining the seats of device of this kind |
US5269105A (en) * | 1992-09-29 | 1993-12-14 | Bausch & Lomb Incorporated | Method of generating a toric surface on a molding tool |
WO1994007685A1 (en) * | 1992-09-29 | 1994-04-14 | Bausch & Lomb Incorporated | Method of generating a toric surface on a molding tool |
US5330203A (en) * | 1992-09-29 | 1994-07-19 | Bausch & Lomb Incorporated | Method of generating a toric surface on a molding tool |
US5347896A (en) * | 1992-12-21 | 1994-09-20 | Bausch & Lomb Incorporated | Automated collet loading for the manufacture of contact lenses |
US5502518A (en) * | 1993-09-09 | 1996-03-26 | Scient Optics Inc | Asymmetric aspheric contact lens |
US20070243277A1 (en) * | 2006-04-14 | 2007-10-18 | Hon Hai Precision Industry Co., Ltd. | Molding assembly |
US7563088B2 (en) * | 2006-04-14 | 2009-07-21 | Hon Hai Precision Industry Co., Ltd. | Molding assembly |
US20090169666A1 (en) * | 2007-12-27 | 2009-07-02 | Hon Hai Precision Industry Co., Ltd. | Mold for forming optical lens |
US7946838B2 (en) * | 2007-12-27 | 2011-05-24 | Hon Hai Precision Industry Co., Ltd. | Mold for forming optical lens |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: WESLEY-JESSEN INC. Free format text: MERGER;ASSIGNORS:SCHERING LENS, INC. (INTO);W-J (DELAWARE) INC. (CHANGED TO);REEL/FRAME:004078/0690 Effective date: 19800923 Owner name: W-J (DELAWARE) INC. Free format text: MERGER;ASSIGNOR:WESLEY-JESSEN INC.;REEL/FRAME:004078/0698 Effective date: 19800923 Owner name: SCHERING CORPORATION GALLOPING HILL ROAD, KENILWOR Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WESLEY-JESSEN INC., A CORP OF DE;REEL/FRAME:004078/0706 Effective date: 19811218 Owner name: WESLEY-JESSEN INC., NEW JERSEY Free format text: MERGER;ASSIGNORS:SCHERING LENS, INC. (INTO);W-J (DELAWARE) INC. (CHANGED TO);REEL/FRAME:004078/0690 Effective date: 19800923 Owner name: W-J (DELAWARE) INC., NEW JERSEY Free format text: MERGER;ASSIGNOR:WESLEY-JESSEN INC.;REEL/FRAME:004078/0698 Effective date: 19800923 |