GB1156455A - Method and Apparatus for Producing Aspheric Contact Lenses - Google Patents

Method and Apparatus for Producing Aspheric Contact Lenses

Info

Publication number
GB1156455A
GB1156455A GB1974467A GB1974467A GB1156455A GB 1156455 A GB1156455 A GB 1156455A GB 1974467 A GB1974467 A GB 1974467A GB 1974467 A GB1974467 A GB 1974467A GB 1156455 A GB1156455 A GB 1156455A
Authority
GB
United Kingdom
Prior art keywords
tool
cutting face
turning
contact lenses
rotating
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
Application number
GB1974467A
Inventor
David Volk
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1974467A priority Critical patent/GB1156455A/en
Publication of GB1156455A publication Critical patent/GB1156455A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
    • 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
    • B24B13/046—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 a pointed tool or scraper-like tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00932—Combined cutting and grinding thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Turning (AREA)

Abstract

1,156,455. Lathe and tools for turning aspheric surfaces. D. VOLK. 28 April, 1967, No. 19744/67. Headings B3B, B3D and B3T. Apparatus for turning aspheric surfaces on workpieces, e.g. of optical material for contact lenses, comprises a tool of generally cylindrical or conical form having an inclined cutting face of generally elliptical outline, and means for feeding the tool relative to the rotating workpiece along the workpiece axis with the apex of the ellipse on the axis and the cutting face inclined thereto. The tool may be solid, 26, Fig. 7, for forming concave surfaces or hollow 26a, Fig. 8, for forming convex surfaces. Where the angle # + # is less than, equal to or greater than 90 degrees the surfaces formed are respectively ellipsoids, paraboloids and hyperboloids. The tool shank, Fig. 3 has a rectangular section portion 27 with a recess 29 therein whereby it is clamped by a bolt 28, Fig. 1, in a swivel post 20 mounted on a support 21 which may be elevated by rotating it on a screwed projection 22 on the cross-slide 16. The tool may be of hardened steel or of metal with embedded diamond particles. The tool stem on which the cutting face is formed may be an elliptic cylinder or cone and the cutting face may be slightly curved in concave or convex sense, thus providing, where desired, a cutting face not truly elliptical.
GB1974467A 1967-04-28 1967-04-28 Method and Apparatus for Producing Aspheric Contact Lenses Expired GB1156455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1974467A GB1156455A (en) 1967-04-28 1967-04-28 Method and Apparatus for Producing Aspheric Contact Lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1974467A GB1156455A (en) 1967-04-28 1967-04-28 Method and Apparatus for Producing Aspheric Contact Lenses

Publications (1)

Publication Number Publication Date
GB1156455A true GB1156455A (en) 1969-06-25

Family

ID=10134486

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1974467A Expired GB1156455A (en) 1967-04-28 1967-04-28 Method and Apparatus for Producing Aspheric Contact Lenses

Country Status (1)

Country Link
GB (1) GB1156455A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084458A (en) * 1973-10-06 1978-04-18 Global Vision (U.K.) Limited Manufacture of contact lenses
US4745672A (en) * 1982-05-14 1988-05-24 Sealey Michael J Method of manufacturing contact lenses

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084458A (en) * 1973-10-06 1978-04-18 Global Vision (U.K.) Limited Manufacture of contact lenses
US4745672A (en) * 1982-05-14 1988-05-24 Sealey Michael J Method of manufacturing contact lenses
US5115553A (en) * 1982-05-14 1992-05-26 The Cooper Companies, Inc. Contact lens manufacturing apparatus

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