GB963407A - Improvements in or relating to processes and apparatus for the production of toric surfaces - Google Patents

Improvements in or relating to processes and apparatus for the production of toric surfaces

Info

Publication number
GB963407A
GB963407A GB700962A GB700962A GB963407A GB 963407 A GB963407 A GB 963407A GB 700962 A GB700962 A GB 700962A GB 700962 A GB700962 A GB 700962A GB 963407 A GB963407 A GB 963407A
Authority
GB
United Kingdom
Prior art keywords
lens
revolution
slide
deformation
production
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
GB700962A
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.)
LENTILLES OPHTALMIQUES RATIONN
Original Assignee
LENTILLES OPHTALMIQUES RATIONN
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 LENTILLES OPHTALMIQUES RATIONN filed Critical LENTILLES OPHTALMIQUES RATIONN
Publication of GB963407A publication Critical patent/GB963407A/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
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • 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
    • B24B13/0025—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for contact lenses
    • 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
    • B24B13/0043—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor the workpieces being deformed during the grinding operation
    • 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
    • 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
    • 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
    • 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
    • B29D11/02—Artificial eyes from organic plastic material
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
    • B29C2043/3615—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices
    • B29C2043/3618—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices plurality of counteracting elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses

Abstract

963,407. Grinding; turning; machine-tool details. LENTILLES OPHTHALMIQUES RATIONELLES S.A. Feb. 22, 1962 [March 22, 1961], No. 7009/62. Headings B3B, B3D and B3T. A process for the production of a toric surface on a body of resilient material, such as in the production of a contact lens, comprises forming a surface of revolution on the body, compressing the body between two opposed forces acting at right angles to the axis of revolution of the surface, machining the surface so deformed in such a manner that it again becomes a surface of revolution, and finally releasing the compressive forces. The lens 40 may be of the form shown in Fig. 1 in which the surface of revolution is a spheroidal cap and deformation is effected by compression along a base circle diameter. The flanged base 39 of the lens is gripped by the upstanding portions 29 of four L-shaped jaws 27 which are slidably mounted in bores in a holding element 20 and urged inwardly against the action of outwardly-acting springs 31 by the rotation of the element 20 in a surrounding housing 1 having an oval bore 6, Fig. 2, constituted by two circular arcs of radius R with centres O displaced a distance d as shown. Depressions 28 in the base of the element 20 enable it to be rotated to position the jaws so as to provide the desired degree of deformation of the lens. When suitably deformed, the lens is turned or ground, and polished. In the modification shown in Figs. 4 and 5, the lens 60 is mounted in the lower end of a bore 57 in a vertically-movable support plate 55 and compression of the lens is effected by causing a slide 67 to urge the lens against an oppositelydisposed straight edge 64 on the support; the slide 67 is operated from a screw 57 whose tapered face 74 contacts a peg 68 on the slide. Upon suitable deformation of the lens the support 55 is lowered so as to bring the lens into contact with melted wax in a cup 53, and the subsequent machining operation is carried out when the wax has hardened.
GB700962A 1961-03-22 1962-02-22 Improvements in or relating to processes and apparatus for the production of toric surfaces Expired GB963407A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR856405A FR1296592A (en) 1961-03-22 1961-03-22 Process for obtaining a toric surface, in particular for the machining of scleral contact lenses and corneal lenses, and device for implementing this process

Publications (1)

Publication Number Publication Date
GB963407A true GB963407A (en) 1964-07-08

Family

ID=8751393

Family Applications (1)

Application Number Title Priority Date Filing Date
GB700962A Expired GB963407A (en) 1961-03-22 1962-02-22 Improvements in or relating to processes and apparatus for the production of toric surfaces

Country Status (2)

Country Link
FR (1) FR1296592A (en)
GB (1) GB963407A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837124A (en) * 1973-09-26 1974-09-24 Celestron Pacific Method for making replica contour block masters for producing schmidt corrector plates
US3837125A (en) * 1973-09-04 1974-09-24 Celestron Pacific Method and system for making schmidt corrector lenses
US4118853A (en) * 1975-10-30 1978-10-10 Essilor International, Cie Generale D'optique Method of making an ophthalmic lens of progressively variable focal power
US4580882A (en) * 1983-04-21 1986-04-08 Benjamin Nuchman Continuously variable contact lens
EP0325673A2 (en) * 1986-11-12 1989-08-02 Wilhelm F. Kunzler Mold for and method of making contact and intraocular lenses
US4900482A (en) * 1986-07-29 1990-02-13 Thomas Penrhyn F Method and apparatus for buckling contact lenses
EP0657246A1 (en) * 1993-12-06 1995-06-14 Peter Höfer Process for production of aspherical lenses especially toric contact lenses

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114721165B (en) * 2022-04-20 2023-12-05 江苏鸿晨集团有限公司 Teenager's eyesight prevents accuse honeycomb lens and manufacturing equipment thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837125A (en) * 1973-09-04 1974-09-24 Celestron Pacific Method and system for making schmidt corrector lenses
US3837124A (en) * 1973-09-26 1974-09-24 Celestron Pacific Method for making replica contour block masters for producing schmidt corrector plates
USRE29878E (en) * 1973-09-26 1979-01-09 Celestron Pacific Method for making replica contour block masters for producing Schmidt corrector plates
US4118853A (en) * 1975-10-30 1978-10-10 Essilor International, Cie Generale D'optique Method of making an ophthalmic lens of progressively variable focal power
US4580882A (en) * 1983-04-21 1986-04-08 Benjamin Nuchman Continuously variable contact lens
US4900482A (en) * 1986-07-29 1990-02-13 Thomas Penrhyn F Method and apparatus for buckling contact lenses
EP0325673A2 (en) * 1986-11-12 1989-08-02 Wilhelm F. Kunzler Mold for and method of making contact and intraocular lenses
EP0325673A3 (en) * 1986-11-12 1990-03-21 Wilhelm F. Kunzler Mold for and method of making contact and intraocular lenses
EP0657246A1 (en) * 1993-12-06 1995-06-14 Peter Höfer Process for production of aspherical lenses especially toric contact lenses

Also Published As

Publication number Publication date
FR1296592A (en) 1962-06-22

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