ZA912459B - Lens grinding method and apparatus - Google Patents

Lens grinding method and apparatus

Info

Publication number
ZA912459B
ZA912459B ZA912459A ZA912459A ZA912459B ZA 912459 B ZA912459 B ZA 912459B ZA 912459 A ZA912459 A ZA 912459A ZA 912459 A ZA912459 A ZA 912459A ZA 912459 B ZA912459 B ZA 912459B
Authority
ZA
South Africa
Prior art keywords
sweep
cross
tool
base
lens
Prior art date
Application number
ZA912459A
Inventor
Stephen Kulan
Kulan Stephen
Original Assignee
Pilkington Visioncare Inc
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 Pilkington Visioncare Inc filed Critical Pilkington Visioncare Inc
Publication of ZA912459B publication Critical patent/ZA912459B/en

Links

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
    • B24B13/04—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 involving grinding wheels controlled by gearing
    • B24B13/043—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 involving grinding wheels controlled by gearing using cup-type grinding wheels
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)
  • Saccharide Compounds (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention provides a method of generating a lens having desired base and cross curvatures by means of a circular cup shaped diamond tool (42), which is rotated about an axis and is swept repeatedly over a lens blank (68) to remove material so as to generate the required surface, the tool being positioned so as to produce the desired combination of base and cross curvatures on the blank, the method comprising positioning the diamond tool by means of a cross slide (24) and a base slide (22), both of which slides are free to move during the generation of the surface; sweeping the rotating tool over the lens blank and adjusting the cross slide and/or the base slide during the sweep thereby to vary the head angle of the tool during the sweep such that at any position in the sweep the instantaneous head angle is at a value whereby the desired cross curvature produced is constant over the sweep. The invention also relates to a lens generating machine. <IMAGE>
ZA912459A 1990-04-18 1991-04-03 Lens grinding method and apparatus ZA912459B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51083490A 1990-04-18 1990-04-18

Publications (1)

Publication Number Publication Date
ZA912459B true ZA912459B (en) 1992-03-25

Family

ID=24032395

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA912459A ZA912459B (en) 1990-04-18 1991-04-03 Lens grinding method and apparatus

Country Status (10)

Country Link
EP (1) EP0453094B1 (en)
JP (1) JPH04226856A (en)
KR (1) KR910018131A (en)
AT (1) ATE114528T1 (en)
AU (1) AU7379191A (en)
BR (1) BR9101549A (en)
CA (1) CA2039289A1 (en)
DE (1) DE69105336T2 (en)
FI (1) FI911876A (en)
ZA (1) ZA912459B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5678967A (en) * 1995-11-21 1997-10-21 Micro Optics Design Corporation Apparatus for cutting a workpiece and including a kinematic tool coupling

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806327A (en) * 1954-03-03 1957-09-17 Orin W Coburn Lens grinder
US3289355A (en) * 1963-04-22 1966-12-06 Coburn Mfg Company Inc Automatic lens grinding machine
JPS60114457A (en) * 1983-11-26 1985-06-20 Nippon Kogaku Kk <Nikon> Spherical face forming grinder
US4574527A (en) * 1984-10-05 1986-03-11 Craxton Robert S Toric lens generating

Also Published As

Publication number Publication date
BR9101549A (en) 1991-12-03
DE69105336T2 (en) 1995-05-04
CA2039289A1 (en) 1991-10-19
DE69105336D1 (en) 1995-01-12
ATE114528T1 (en) 1994-12-15
EP0453094B1 (en) 1994-11-30
FI911876A (en) 1991-10-19
EP0453094A3 (en) 1992-04-01
KR910018131A (en) 1991-11-30
JPH04226856A (en) 1992-08-17
AU7379191A (en) 1991-10-24
EP0453094A2 (en) 1991-10-23
FI911876A0 (en) 1991-04-18

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