FR478320A - Multi-focal eye lens - Google Patents

Multi-focal eye lens

Info

Publication number
FR478320A
FR478320A FR478320DA FR478320A FR 478320 A FR478320 A FR 478320A FR 478320D A FR478320D A FR 478320DA FR 478320 A FR478320 A FR 478320A
Authority
FR
France
Prior art keywords
eye lens
focal eye
focal
lens
eye
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
Other languages
French (fr)
Inventor
Henry Orford Gowlland
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
Application granted granted Critical
Publication of FR478320A publication Critical patent/FR478320A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" 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
    • G02C7/063—Shape of the progressive surface

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
FR478320D 1914-04-08 1915-04-08 Multi-focal eye lens Expired FR478320A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA478320X 1914-04-08

Publications (1)

Publication Number Publication Date
FR478320A true FR478320A (en) 1915-12-03

Family

ID=1515858

Family Applications (1)

Application Number Title Priority Date Filing Date
FR478320D Expired FR478320A (en) 1914-04-08 1915-04-08 Multi-focal eye lens

Country Status (1)

Country Link
FR (1) FR478320A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1145820B (en) * 1956-10-06 1963-03-21 Saint Gobain Lens
DE1151955B (en) * 1953-11-25 1963-07-25 & Commerciale Des Ouvriers Lun Optical element with constantly changing refractive power
DE1158281B (en) * 1961-08-03 1963-11-28 Wilhelm Peter Soehnges Corneal contact lens
DE1422125B1 (en) * 1954-10-04 1969-09-04 Akademie D Wissenschaften Zu B Spectacle lenses with different diopters in the far and near range

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151955B (en) * 1953-11-25 1963-07-25 & Commerciale Des Ouvriers Lun Optical element with constantly changing refractive power
DE1422125B1 (en) * 1954-10-04 1969-09-04 Akademie D Wissenschaften Zu B Spectacle lenses with different diopters in the far and near range
DE1145820B (en) * 1956-10-06 1963-03-21 Saint Gobain Lens
DE1158281B (en) * 1961-08-03 1963-11-28 Wilhelm Peter Soehnges Corneal contact lens

Similar Documents

Publication Publication Date Title
FR478320A (en) Multi-focal eye lens
CA159395A (en) Multi-focal lens
ES60304A1 (en) Multifocal spectacle lenses.
FR484419A (en) Lens
FR479943A (en) Artificial rogue
DK19433C (en) Eye shield.
ES61525A3 (en) Celluloid glasses.
CH67203A (en) Shutter
CH55228A (en) Toric lens
CH71926A (en) Photogrammeter
CH73983A (en) Photogrammeter
CH72540A (en) Joiont
CH71606A (en) Changing image
FR478382A (en) Periscope
FR502119A (en) Periscope
CH62899A (en) Binoculars theater glasses
FR443226A (en) Transparent eye cup
FR521579A (en) Elastic suspension
CH72457A (en) mower
FR476674A (en) Binocular frame
FR481167A (en) Adjustable headlights
CH71217A (en) safety goggles
CH72516A (en) Glasses
DK24617C (en) Lubricant replacement.
DK30445C (en) Clarifier.