FR2294990A1 - Multifocal length lenses - combining high and low refractive index layers and grinding through the interface - Google Patents

Multifocal length lenses - combining high and low refractive index layers and grinding through the interface

Info

Publication number
FR2294990A1
FR2294990A1 FR7538259A FR7538259A FR2294990A1 FR 2294990 A1 FR2294990 A1 FR 2294990A1 FR 7538259 A FR7538259 A FR 7538259A FR 7538259 A FR7538259 A FR 7538259A FR 2294990 A1 FR2294990 A1 FR 2294990A1
Authority
FR
France
Prior art keywords
interface
grinding
refractive index
low refractive
index layers
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.)
Withdrawn
Application number
FR7538259A
Other languages
French (fr)
Inventor
Emil Wolfgang Deeg
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.)
American Optical Corp
Original Assignee
American Optical Corp
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 American Optical Corp filed Critical American Optical Corp
Publication of FR2294990A1 publication Critical patent/FR2294990A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/0307—Press-bending involving applying local or additional heating, cooling or insulating means
    • 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
    • B24B13/0012—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for multifocal lenses
    • 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
    • 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
    • B29D11/00028—Bifocal lenses; Multifocal lenses
    • 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
    • B29D11/0073—Optical laminates
    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C03B11/082—Construction of plunger or mould for making solid articles, e.g. lenses having profiled, patterned or microstructured surfaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/02—Forming molten glass coated with coloured layers; Forming molten glass of different compositions or layers; Forming molten glass comprising reinforcements or inserts
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/20—Uniting glass pieces by fusing without substantial reshaping
    • C03B23/22—Uniting glass lenses, e.g. forming bifocal lenses
    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/406—Products comprising at least two different glasses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/41—Profiled surfaces
    • C03B2215/412—Profiled surfaces fine structured, e.g. fresnel lenses, prismatic reflectors, other sharp-edged surface profiles
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/46—Lenses, e.g. bi-convex
    • C03B2215/48—Convex-concave
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/46—Lenses, e.g. bi-convex
    • C03B2215/49—Complex forms not covered by groups C03B2215/47 or C03B2215/48

Landscapes

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

Abstract

A multiple-focal length lens (e.g. bifocal) is produced by (a) laminating a layer of a high R.I. opthalmic material to another layer with relatively low R.I., forming an interface with high-low index (b) shaping >=1 part of the laminate into a generally meniscus-shaped rough lens, with meniscus-shaped interface (c) grinding opposite sides to the radii desired for convex object and concave ocular surfaces, continuing the grinding on each side towards the interface according to the desired proportions and orientation etc. to produce the required multiple focussing property. All the rough lenses have the same basic geometry.
FR7538259A 1974-12-16 1975-12-15 Multifocal length lenses - combining high and low refractive index layers and grinding through the interface Withdrawn FR2294990A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53278774A 1974-12-16 1974-12-16

Publications (1)

Publication Number Publication Date
FR2294990A1 true FR2294990A1 (en) 1976-07-16

Family

ID=24123170

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7538259A Withdrawn FR2294990A1 (en) 1974-12-16 1975-12-15 Multifocal length lenses - combining high and low refractive index layers and grinding through the interface

Country Status (4)

Country Link
JP (1) JPS5838766B2 (en)
CA (1) CA1044930A (en)
DE (1) DE2553325A1 (en)
FR (1) FR2294990A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2419257A1 (en) * 1978-03-08 1979-10-05 Stenger Et Cie Sarl E Et G Multifocal, glass spectacle lens - with progressive alteration in power of zone for close observation or reading
FR2450788A1 (en) * 1979-03-08 1980-10-03 Corning Glass Works COMPOSITE MULTIFOCAL STICKS OR SEGMENTS AND PROCESS FOR THEIR MANUFACTURE
FR2615005A1 (en) * 1987-04-24 1988-11-10 Hoya Corp METHOD FOR MANUFACTURING AN OPHTHALMIC LENS
DE3715535A1 (en) * 1987-05-09 1988-11-17 Hans Joachim Dipl P Kirschning Glass roof-tiles which act as solar-cells - produced by plastic deformation of float glass material
EP0320887A2 (en) * 1987-12-14 1989-06-21 Ichikoh Industries Limited Method for forming fresnel-type prism lens
EP0545615A1 (en) * 1991-11-29 1993-06-09 Sola International Inc. Polymer bifocal lens production process
FR2690434A1 (en) * 1992-04-23 1993-10-29 Corning Inc Forming of aspherical optical cpd. glass lenses - by delivering molten glass to cavity of porous mould, driving upper component into molten glass, cooling and transferring to pressing station
FR2738237A1 (en) * 1995-09-04 1997-03-07 Corning Inc Mfg. rectangular cross-section glass bars with gradient of compsn.
EP0848688A1 (en) * 1995-09-04 1998-06-24 Corning Incorporated Method for making an article having a gradient of composition
WO2017040452A1 (en) * 2015-09-04 2017-03-09 Corning Incorporated Method of making shaped glass articles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2481813A1 (en) * 1980-04-30 1981-11-06 Essilor Int PROGRESSIVE OPHTHALMIC LENS
KR100390147B1 (en) * 2001-04-17 2003-07-04 한독옵텍 주식회사 A processing method for reducing thickness and weight of progressive lens

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2419257A1 (en) * 1978-03-08 1979-10-05 Stenger Et Cie Sarl E Et G Multifocal, glass spectacle lens - with progressive alteration in power of zone for close observation or reading
FR2450788A1 (en) * 1979-03-08 1980-10-03 Corning Glass Works COMPOSITE MULTIFOCAL STICKS OR SEGMENTS AND PROCESS FOR THEIR MANUFACTURE
FR2615005A1 (en) * 1987-04-24 1988-11-10 Hoya Corp METHOD FOR MANUFACTURING AN OPHTHALMIC LENS
DE3715535A1 (en) * 1987-05-09 1988-11-17 Hans Joachim Dipl P Kirschning Glass roof-tiles which act as solar-cells - produced by plastic deformation of float glass material
US5049177A (en) * 1987-12-14 1991-09-17 Ichikoh Industries, Ltd. Method for forming fresnel-type prism lens
EP0320887A3 (en) * 1987-12-14 1990-09-05 Ichikoh Industries Limited Method for forming fresnel-type prism lens
EP0320887A2 (en) * 1987-12-14 1989-06-21 Ichikoh Industries Limited Method for forming fresnel-type prism lens
EP0545615A1 (en) * 1991-11-29 1993-06-09 Sola International Inc. Polymer bifocal lens production process
US5366668A (en) * 1991-11-29 1994-11-22 Pilkington Visioncare Inc. Polymeric bifocal lens production process
FR2690434A1 (en) * 1992-04-23 1993-10-29 Corning Inc Forming of aspherical optical cpd. glass lenses - by delivering molten glass to cavity of porous mould, driving upper component into molten glass, cooling and transferring to pressing station
FR2738237A1 (en) * 1995-09-04 1997-03-07 Corning Inc Mfg. rectangular cross-section glass bars with gradient of compsn.
EP0848688A1 (en) * 1995-09-04 1998-06-24 Corning Incorporated Method for making an article having a gradient of composition
EP0848688A4 (en) * 1995-09-04 1998-10-28 Corning Inc Method for making an article having a gradient of composition
WO2017040452A1 (en) * 2015-09-04 2017-03-09 Corning Incorporated Method of making shaped glass articles

Also Published As

Publication number Publication date
CA1044930A (en) 1978-12-26
JPS5184266A (en) 1976-07-23
JPS5838766B2 (en) 1983-08-25
DE2553325A1 (en) 1976-07-01

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Legal Events

Date Code Title Description
ST Notification of lapse