FR767170A - Lentilles multi-focales ou bi-focales - Google Patents

Lentilles multi-focales ou bi-focales

Info

Publication number
FR767170A
FR767170A FR767170DA FR767170A FR 767170 A FR767170 A FR 767170A FR 767170D A FR767170D A FR 767170DA FR 767170 A FR767170 A FR 767170A
Authority
FR
France
Prior art keywords
focal
lenses
focal lenses
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
English (en)
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.)
BRITISH A O Co Ltd
Original Assignee
BRITISH A O Co Ltd
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 BRITISH A O Co Ltd filed Critical BRITISH A O Co Ltd
Application granted granted Critical
Publication of FR767170A publication Critical patent/FR767170A/fr
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

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR767170D 1934-01-16 1934-01-16 Lentilles multi-focales ou bi-focales Expired FR767170A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR767170T 1934-01-16

Publications (1)

Publication Number Publication Date
FR767170A true FR767170A (fr) 1934-07-12

Family

ID=9183731

Family Applications (1)

Application Number Title Priority Date Filing Date
FR767170D Expired FR767170A (fr) 1934-01-16 1934-01-16 Lentilles multi-focales ou bi-focales

Country Status (1)

Country Link
FR (1) FR767170A (fr)

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