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CA583087A - Variable power lens - Google Patents

Variable power lens

Info

Publication number
CA583087A
CA583087A CA583087A CA687212A CA583087A CA 583087 A CA583087 A CA 583087A CA 583087 A CA583087 A CA 583087A CA 687212 A CA687212 A CA 687212A CA 583087 A CA583087 A CA 583087A
Authority
CA
Canada
Prior art keywords
variable power
power lens
lens
variable
power
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
CA583087A
Other languages
French (fr)
Inventor
J. Davenport Lawrence
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA583087A priority Critical patent/CA583087A/en
Application granted granted Critical
Publication of CA583087A publication Critical patent/CA583087A/en
Expired 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
    • G02C7/065—Properties on the principal line
    • 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

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
CA583087A 1955-06-04 1955-06-04 Variable power lens Expired CA583087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA583087A CA583087A (en) 1955-06-04 1955-06-04 Variable power lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA583087A CA583087A (en) 1955-06-04 1955-06-04 Variable power lens

Publications (1)

Publication Number Publication Date
CA583087A true CA583087A (en) 1959-09-15

Family

ID=4140978

Family Applications (1)

Application Number Title Priority Date Filing Date
CA583087A Expired CA583087A (en) 1955-06-04 1955-06-04 Variable power lens

Country Status (1)

Country Link
CA (1) CA583087A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499725A1 (en) * 1981-02-09 1982-08-13 American Optical Corp OPHTHALMIC LENSES WITH PROGRESSIVE POWER
WO1982003129A1 (en) * 1981-03-09 1982-09-16 Camelot Ind Corp Variably blended bifocal lens
US4861153A (en) * 1986-12-19 1989-08-29 American Optical Corporation Progressive addition spectacle lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499725A1 (en) * 1981-02-09 1982-08-13 American Optical Corp OPHTHALMIC LENSES WITH PROGRESSIVE POWER
WO1982003129A1 (en) * 1981-03-09 1982-09-16 Camelot Ind Corp Variably blended bifocal lens
US4861153A (en) * 1986-12-19 1989-08-29 American Optical Corporation Progressive addition spectacle lens

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