FR972730A - Lenses with multiple focal points and with common axes and their manufacturing process - Google Patents

Lenses with multiple focal points and with common axes and their manufacturing process

Info

Publication number
FR972730A
FR972730A FR972730DA FR972730A FR 972730 A FR972730 A FR 972730A FR 972730D A FR972730D A FR 972730DA FR 972730 A FR972730 A FR 972730A
Authority
FR
France
Prior art keywords
lenses
manufacturing process
focal points
multiple focal
common axes
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
Serge Clave
Marcel Clave
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 filed Critical
Application granted granted Critical
Publication of FR972730A publication Critical patent/FR972730A/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Health & Medical Sciences (AREA)
FR972730D 1941-04-04 1941-04-04 Lenses with multiple focal points and with common axes and their manufacturing process Expired FR972730A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR972730T 1941-04-04

Publications (1)

Publication Number Publication Date
FR972730A true FR972730A (en) 1951-02-02

Family

ID=9516200

Family Applications (1)

Application Number Title Priority Date Filing Date
FR972730D Expired FR972730A (en) 1941-04-04 1941-04-04 Lenses with multiple focal points and with common axes and their manufacturing process

Country Status (1)

Country Link
FR (1) FR972730A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1422125B1 (en) * 1954-10-04 1969-09-04 Akademie D Wissenschaften Zu B Spectacle lenses with different diopters in the far and near range
US4573777A (en) * 1984-03-08 1986-03-04 Bristol Alexander C Aspheric spectacle lens blank

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1422125B1 (en) * 1954-10-04 1969-09-04 Akademie D Wissenschaften Zu B Spectacle lenses with different diopters in the far and near range
US4573777A (en) * 1984-03-08 1986-03-04 Bristol Alexander C Aspheric spectacle lens blank

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