BR9101549A - PROCESS AND MACHINE OF GENERATING A LENS THAT HAS DESIRED BASE AND CROSS-BENDING - Google Patents

PROCESS AND MACHINE OF GENERATING A LENS THAT HAS DESIRED BASE AND CROSS-BENDING

Info

Publication number
BR9101549A
BR9101549A BR919101549A BR9101549A BR9101549A BR 9101549 A BR9101549 A BR 9101549A BR 919101549 A BR919101549 A BR 919101549A BR 9101549 A BR9101549 A BR 9101549A BR 9101549 A BR9101549 A BR 9101549A
Authority
BR
Brazil
Prior art keywords
cross
lens
sweep
tool
base
Prior art date
Application number
BR919101549A
Other languages
Portuguese (pt)
Inventor
Stephen Kulan
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 BR9101549A publication Critical patent/BR9101549A/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

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>
BR919101549A 1990-04-18 1991-04-17 PROCESS AND MACHINE OF GENERATING A LENS THAT HAS DESIRED BASE AND CROSS-BENDING BR9101549A (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
BR9101549A true BR9101549A (en) 1991-12-03

Family

ID=24032395

Family Applications (1)

Application Number Title Priority Date Filing Date
BR919101549A BR9101549A (en) 1990-04-18 1991-04-17 PROCESS AND MACHINE OF GENERATING A LENS THAT HAS DESIRED BASE AND CROSS-BENDING

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
EP0453094A3 (en) 1992-04-01
KR910018131A (en) 1991-11-30
ATE114528T1 (en) 1994-12-15
EP0453094B1 (en) 1994-11-30
FI911876A (en) 1991-10-19
JPH04226856A (en) 1992-08-17
FI911876A0 (en) 1991-04-18
CA2039289A1 (en) 1991-10-19
DE69105336T2 (en) 1995-05-04
ZA912459B (en) 1992-03-25
DE69105336D1 (en) 1995-01-12
EP0453094A2 (en) 1991-10-23
AU7379191A (en) 1991-10-24

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