FR2326718A2 - Trifocal spectacle lens with cosmetic appearance - where there is no distortion of vertical lines viewed through the lens - Google Patents

Trifocal spectacle lens with cosmetic appearance - where there is no distortion of vertical lines viewed through the lens

Info

Publication number
FR2326718A2
FR2326718A2 FR7628575A FR7628575A FR2326718A2 FR 2326718 A2 FR2326718 A2 FR 2326718A2 FR 7628575 A FR7628575 A FR 7628575A FR 7628575 A FR7628575 A FR 7628575A FR 2326718 A2 FR2326718 A2 FR 2326718A2
Authority
FR
France
Prior art keywords
lens
curve
vertical lines
cosmetic appearance
distortion
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.)
Granted
Application number
FR7628575A
Other languages
French (fr)
Other versions
FR2326718B2 (en
Inventor
John Talley Winthrop
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
Priority claimed from US05/619,143 external-priority patent/US4056311A/en
Priority claimed from US05/638,869 external-priority patent/US4062629A/en
Priority claimed from US05/638,870 external-priority patent/US4055379A/en
Application filed by American Optical Corp filed Critical American Optical Corp
Publication of FR2326718A2 publication Critical patent/FR2326718A2/en
Application granted granted Critical
Publication of FR2326718B2 publication Critical patent/FR2326718B2/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power
    • G02C7/063—Shape of the progressive 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
    • 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
    • C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
    • C03B23/0352—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet
    • C03B23/0357—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet by suction without blowing, e.g. with vacuum or by venturi effect
    • 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
    • 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
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power

Landscapes

  • Chemical & Material Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Eyeglasses (AREA)
  • Lenses (AREA)

Abstract

A multifocus spectacle lens, esp. a trifocal lens uses a vertical meridional curve (C) dividing the lens into two halves and forming three horizontal zones with no unsightly jumps in the curve (C). The top zone is for viewing distant objects, whereas the other two zones are subdivided along their widths into >=3 parts, curve (C) running down the centre of the middle part, the other parts being aspherical. The surface of each outer side part forms part of a surface of revolution with a vertical axis of rotation in the main meridional plane. A lens with a cosmetic appearance, and where observed vertical lines seen through the lens are unbroken over the entire field of view.
FR7628575A 1973-08-16 1976-09-23 Trifocal spectacle lens with cosmetic appearance - where there is no distortion of vertical lines viewed through the lens Granted FR2326718A2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US38904373A 1973-08-16 1973-08-16
US38904273A 1973-08-16 1973-08-16
US38904473A 1973-08-16 1973-08-16
US05/619,143 US4056311A (en) 1973-08-16 1975-10-01 Progressive power ophthalmic lens having a plurality of viewing zones with non-discontinuous variations therebetween
US05/638,869 US4062629A (en) 1973-08-16 1975-12-08 Progressive power ophthalmic lens having a plurality of viewing zone with discontinuous power variations therebetween
US05/638,870 US4055379A (en) 1973-08-16 1975-12-08 Multifocal lens

Publications (2)

Publication Number Publication Date
FR2326718A2 true FR2326718A2 (en) 1977-04-29
FR2326718B2 FR2326718B2 (en) 1982-04-30

Family

ID=62567082

Family Applications (2)

Application Number Title Priority Date Filing Date
FR7428011A Granted FR2270613A1 (en) 1973-08-16 1974-08-13 Very strong spectacle lenses - has a continuously variable refractive index
FR7628575A Granted FR2326718A2 (en) 1973-08-16 1976-09-23 Trifocal spectacle lens with cosmetic appearance - where there is no distortion of vertical lines viewed through the lens

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR7428011A Granted FR2270613A1 (en) 1973-08-16 1974-08-13 Very strong spectacle lenses - has a continuously variable refractive index

Country Status (4)

Country Link
JP (1) JPS5753570B2 (en)
DE (5) DE2462446C3 (en)
FR (2) FR2270613A1 (en)
NL (1) NL168626C (en)

Cited By (2)

* 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
FR2476333A1 (en) * 1980-02-14 1981-08-21 Itek Corp OPHTHALMIC LENS WITH PROGRESSIVELY VARIABLE FOCAL POWER

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL168626C (en) * 1973-08-16 1982-04-16 American Optical Corp LENS FOR GLASSES WITH VARIETY OF STRENGTH.
JPS526635U (en) * 1975-07-01 1977-01-18
DE2610203B2 (en) * 1976-03-11 1981-01-22 Optische Werke G. Rodenstock, 8000 Muenchen Progressive lens
FR2425653A1 (en) * 1978-05-12 1979-12-07 Essilor Int PROCESS FOR DEVELOPING A REFRACTION SURFACE OF AN OPHTHALMIC LENS WITH PROGRESSIVELY VARIABLE FOCAL POWER
JPS5942286B2 (en) * 1979-08-24 1984-10-13 セイコーエプソン株式会社 eyeglass lenses
JPS56128916A (en) * 1980-02-14 1981-10-08 Itek Corp Lens for glasses having sequentially varying focus
US4271538A (en) * 1980-03-24 1981-06-09 Norton Company Safety spectacles
JPS56144414A (en) * 1980-04-12 1981-11-10 Hoya Corp Progressive multifocal lens
FR2495789B1 (en) * 1980-12-05 1986-02-14 Suwa Seikosha Kk PROGRESSIVE MULTIFOCAL LENS
JPS5794714A (en) * 1980-12-05 1982-06-12 Seiko Epson Corp Progressive multifocus lens
JPS5799613A (en) * 1980-12-12 1982-06-21 Seiko Epson Corp Progressive multifocus lens
DE3116524C2 (en) * 1981-02-09 1993-06-24 AO Inc., Southbridge, Mass. Spectacle lenses, especially for correcting presbyopia
JPS57210320A (en) * 1981-06-19 1982-12-23 Hoya Corp Progressive focus lens
JPS5988718A (en) * 1982-11-12 1984-05-22 Hoya Corp Progressive focusing spectacle lens considering vergence of eye
JPH0690368B2 (en) * 1985-07-09 1994-11-14 セイコーエプソン株式会社 Progressive multifocal lens and glasses
GB8528460D0 (en) * 1985-11-19 1985-12-24 Sola Int Holdings Multifocal lens
US4838675A (en) * 1987-06-19 1989-06-13 Sola International Holdings, Ltd. Method for improving progressive lens designs and resulting article
DE3739974A1 (en) * 1987-11-25 1989-06-08 Rodenstock Optik G PROGRESSIVE GLASS GLASS
JPH03109522A (en) * 1990-09-14 1991-05-09 Seiko Epson Corp Progressive multifocus lens
US5446508A (en) * 1994-02-18 1995-08-29 Bmc Industries, Inc. Progressive power lens
US6827441B2 (en) * 2002-01-31 2004-12-07 Opticlear Inc. Progressive lens with reduced distortion
JP4807801B2 (en) * 2005-06-03 2011-11-02 Ｈｏｙａ株式会社 Design method for progressive multifocal contact lenses
DE102005057533A1 (en) * 2005-12-01 2007-06-06 Rodenstock Gmbh Method for calculating the magnification and / or distortion and method for producing a spectacle lens with low magnification and / or distortion
CA2877572A1 (en) 2011-09-22 2012-09-24 Ocular Technology Inc. Multi-focal lens
JP2019045545A (en) * 2017-08-30 2019-03-22 東海光学株式会社 Bifocal lens and method for manufacturing the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1271356A (en) * 1915-04-01 1918-07-02 Arthur E Paige Multifocal optical element.
US2475275A (en) * 1945-01-19 1949-07-05 Birchall Henry James Lens of variable focal power having surfaces of involute form
US2919523A (en) * 1951-09-04 1960-01-05 Bozena Marie Phillips Ophthalmic lenses and process and apparatus for producing the same
DE1151955B (en) * 1953-11-25 1963-07-25 & Commerciale Des Ouvriers Lun Optical element with constantly changing refractive power
BE533468A (en) * 1953-11-25
DE1145820B (en) * 1956-10-06 1963-03-21 Saint Gobain Lens
FR1509090A (en) * 1966-11-29 1968-01-12 Lunetiers Cottet Poichet Soc D Improvements to ophthalmic lenses with progressively variable focal power
BE755907A (en) * 1969-09-11 1971-02-15 Lunetiers PROGRESSIVE FOCAL POWER LENSES
NL168626C (en) * 1973-08-16 1982-04-16 American Optical Corp LENS FOR GLASSES WITH VARIETY OF STRENGTH.

Cited By (2)

* 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
FR2476333A1 (en) * 1980-02-14 1981-08-21 Itek Corp OPHTHALMIC LENS WITH PROGRESSIVELY VARIABLE FOCAL POWER

Also Published As

Publication number Publication date
DE7630825U1 (en) 1980-04-17
FR2326718B2 (en) 1982-04-30
NL168626B (en) 1981-11-16
DE2439127A1 (en) 1975-02-27
FR2270613A1 (en) 1975-12-05
NL168626C (en) 1982-04-16
JPS5046348A (en) 1975-04-25
JPS5753570B2 (en) 1982-11-13
NL7410793A (en) 1975-02-18
FR2270613B1 (en) 1979-06-15
DE2644510A1 (en) 1977-04-14
DE2439127B2 (en) 1977-10-06
DE2462446B2 (en) 1979-01-25
DE2462446A1 (en) 1977-03-31
DE2644450A1 (en) 1977-04-07
DE2462446C3 (en) 1979-09-20

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Legal Events

Date Code Title Description
TP Transmission of property