ZA888416B - Multifocal optical device - Google Patents

Multifocal optical device

Info

Publication number
ZA888416B
ZA888416B ZA888416A ZA888416A ZA888416B ZA 888416 B ZA888416 B ZA 888416B ZA 888416 A ZA888416 A ZA 888416A ZA 888416 A ZA888416 A ZA 888416A ZA 888416 B ZA888416 B ZA 888416B
Authority
ZA
South Africa
Prior art keywords
facet
optical device
smooth curve
multifocal optical
outer corner
Prior art date
Application number
ZA888416A
Other languages
English (en)
Inventor
Allen L Cohen
L Cohen Allen
Original Assignee
L Cohen Allen
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 L Cohen Allen filed Critical L Cohen Allen
Publication of ZA888416B publication Critical patent/ZA888416B/xx

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
    • G02B5/189—Structurally combined with optical elements not having diffractive power
    • G02B5/1895—Structurally combined with optical elements not having diffractive power such optical elements having dioptric power
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
    • 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
    • G02C7/024—Methods of designing ophthalmic lenses
    • G02C7/028—Special mathematical design techniques
    • 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
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • G02C7/042—Simultaneous type
    • 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
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • G02C7/044—Annular configuration, e.g. pupil tuned
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/20—Diffractive and Fresnel lenses or lens portions

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Mathematical Physics (AREA)
  • Prostheses (AREA)
  • Eyeglasses (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Materials For Medical Uses (AREA)
  • Polarising Elements (AREA)
  • Optical Integrated Circuits (AREA)
  • Laser Surgery Devices (AREA)
ZA888416A 1988-07-20 1988-11-10 Multifocal optical device ZA888416B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22200088A 1988-07-20 1988-07-20

Publications (1)

Publication Number Publication Date
ZA888416B true ZA888416B (en) 1989-07-26

Family

ID=22830316

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA888416A ZA888416B (en) 1988-07-20 1988-11-10 Multifocal optical device

Country Status (14)

Country Link
US (1) US4995715A (de)
EP (2) EP0681198A1 (de)
JP (1) JP2849097B2 (de)
KR (1) KR0141607B1 (de)
CN (1) CN1020134C (de)
AT (1) ATE133796T1 (de)
AU (1) AU622420B2 (de)
CA (1) CA1316727C (de)
DE (1) DE3854966T2 (de)
ES (1) ES2081811T3 (de)
GR (1) GR3019724T3 (de)
IE (2) IE960172L (de)
IL (1) IL88350A (de)
ZA (1) ZA888416B (de)

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US4338005A (en) 1978-12-18 1982-07-06 Cohen Allen L Multifocal phase place
US4340283A (en) 1978-12-18 1982-07-20 Cohen Allen L Phase shift multifocal zone plate
US4339005A (en) 1980-07-10 1982-07-13 Atlantic Richfield Company Curved well conductors for offshore platform
DE3265356D1 (en) 1981-04-29 1985-09-19 Pilkington Perkin Elmer Ltd Artificial eye lenses
EP0104832B1 (de) * 1982-09-29 1987-11-11 Pilkington Brothers P.L.C. Ophthalmische Linsen
GB2129157B (en) 1982-10-27 1986-02-05 Pilkington Perkin Elmer Ltd Bifocal contact lenses having defractive power
US5017000A (en) * 1986-05-14 1991-05-21 Cohen Allen L Multifocals using phase shifting
US4881805A (en) * 1987-11-12 1989-11-21 Cohen Allen L Progressive intensity phase bifocal

Also Published As

Publication number Publication date
CA1316727C (en) 1993-04-27
KR0141607B1 (ko) 1998-07-01
IE883377L (en) 1990-01-20
AU622420B2 (en) 1992-04-09
IL88350A0 (en) 1989-06-30
IE73484B1 (en) 1997-06-04
EP0351471B1 (de) 1996-01-31
AU2500488A (en) 1990-01-25
KR900002101A (ko) 1990-02-28
ES2081811T3 (es) 1996-03-16
IE960172L (en) 1990-01-20
EP0351471A3 (en) 1990-07-25
CN1039487A (zh) 1990-02-07
EP0681198A1 (de) 1995-11-08
US4995715A (en) 1991-02-26
CN1020134C (zh) 1993-03-17
EP0351471A2 (de) 1990-01-24
JPH0255314A (ja) 1990-02-23
JP2849097B2 (ja) 1999-01-20
IL88350A (en) 1992-08-18
DE3854966D1 (de) 1996-03-14
ATE133796T1 (de) 1996-02-15
DE3854966T2 (de) 1996-05-30
GR3019724T3 (en) 1996-07-31

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