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GB1488002A - Contact lenses - Google Patents

Contact lenses

Info

Publication number
GB1488002A
GB1488002A GB2070777A GB2070777A GB1488002A GB 1488002 A GB1488002 A GB 1488002A GB 2070777 A GB2070777 A GB 2070777A GB 2070777 A GB2070777 A GB 2070777A GB 1488002 A GB1488002 A GB 1488002A
Authority
GB
United Kingdom
Prior art keywords
curved surface
blank
machining
tool
lens
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
GB2070777A
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.)
GLOBAL VISION Ltd
Original Assignee
GLOBAL VISION 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 GLOBAL VISION Ltd filed Critical GLOBAL VISION Ltd
Priority to GB2070777A priority Critical patent/GB1488002A/en
Publication of GB1488002A publication Critical patent/GB1488002A/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
    • B29D11/00932—Combined cutting and grinding thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/36—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning specially-shaped surfaces by making use of relative movement of the tool and work produced by geometrical mechanisms, i.e. forming-lathes
    • B23B5/40—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning specially-shaped surfaces by making use of relative movement of the tool and work produced by geometrical mechanisms, i.e. forming-lathes for turning spherical surfaces inside or outside
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

1488002 Making contact lens GLOBAL VISION (UK) Ltd 3 Oct 1974 [6 Oct 1973] 20707/77 Divided out of 1488001 Heading B3T A machine for use in manufacturing a contact lens from a lens blank 10 comprises a rotary chuck 101 mounted on a head stock 102, the chuck holding the blank support 11, a pivotal tool-carrier 103 with a tool 20 for machining a first curved surface 90 and edge cutting tool 30 for successive operation on the lens blank by pivoting the carrier 103, cross slides carrying tools 111 and 40 being provided for initial machining and centering of the blank and for machining a frusto-conical surface 93 on the side opposite the first curved surface 90. A microscope 62 for detecting the crown of the first curved surface and which, by the use of indicating means, the desired location of the second curved surface 91 can be determined. The second curved surface 91 is machined by a third cutting tool 70 after the lens blank has been reversed on the mounting and secured to by adhesive to a second support 61.
GB2070777A 1974-10-03 1974-10-03 Contact lenses Expired GB1488002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2070777A GB1488002A (en) 1974-10-03 1974-10-03 Contact lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2070777A GB1488002A (en) 1974-10-03 1974-10-03 Contact lenses

Publications (1)

Publication Number Publication Date
GB1488002A true GB1488002A (en) 1977-10-05

Family

ID=10150348

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2070777A Expired GB1488002A (en) 1974-10-03 1974-10-03 Contact lenses

Country Status (1)

Country Link
GB (1) GB1488002A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006883A4 (en) * 1977-08-02 1980-08-14 Automated Optics Method and apparatus adapted for automatic or semi-automatic fabrication of ultra-precision ophthalmic lenses, e.g., contact lenses.
EP0023800A3 (en) * 1979-08-02 1981-02-18 Yoshiaki Nagaura Manufacturing an article having opposed curved surfaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006883A4 (en) * 1977-08-02 1980-08-14 Automated Optics Method and apparatus adapted for automatic or semi-automatic fabrication of ultra-precision ophthalmic lenses, e.g., contact lenses.
EP0023800A3 (en) * 1979-08-02 1981-02-18 Yoshiaki Nagaura Manufacturing an article having opposed curved surfaces

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921003